Pub Date : 2024-11-06DOI: 10.1016/j.mtsust.2024.101038
Shenglin Yan , Samah A. Mahyoub , Yanran Cui , Qiong Wang , Zhenglong Li
Carbon dioxide electrochemical reduction (CO2ER) affords an appealing pathway for transforming discarded CO2 to fuels and economic chemicals. Various nanocatalysts have been used for CO2ER, of which porous catalysts have attracted widespread attentions because of their large electrochemically active surface area, large number of pores for molecule transportation, and high local pH. Aerogels (including carbon-based aerogels and metallic aerogels), as a new class of porous catalysts, have been applied to CO2ER in recent years because of their high electrical conductivity (to reduce overpotential), three-dimensional porous structure and intrinsic hydrophobicity (to inhibit parasitic hydrogen evolution reaction, HER). In this article, we reviewed latest progresses toward aerogels for CO2ER, including (1) synthesis strategies of carbon-based aerogels and metallic aerogels; (2) innovations in aerogels design, such as heteroatom doping and metal incorporation in carbon-based aerogel, creating grain boundaries, regulating Cu0–Cu+ interfaces, and optimizing synergistic effect in metal aerogels; and (3) structural properties of aerogel catalysts to enhance CO2ER performance. Finally, we discuss the challenges, possible solutions and future directions for further development of aerogels in CO2ER.
{"title":"Aerogels for sustainable CO2 electroreduction to value-added chemicals","authors":"Shenglin Yan , Samah A. Mahyoub , Yanran Cui , Qiong Wang , Zhenglong Li","doi":"10.1016/j.mtsust.2024.101038","DOIUrl":"10.1016/j.mtsust.2024.101038","url":null,"abstract":"<div><div>Carbon dioxide electrochemical reduction (CO<sub>2</sub>ER) affords an appealing pathway for transforming discarded CO<sub>2</sub> to fuels and economic chemicals. Various nanocatalysts have been used for CO<sub>2</sub>ER, of which porous catalysts have attracted widespread attentions because of their large electrochemically active surface area, large number of pores for molecule transportation, and high local pH. Aerogels (including carbon-based aerogels and metallic aerogels), as a new class of porous catalysts, have been applied to CO<sub>2</sub>ER in recent years because of their high electrical conductivity (to reduce overpotential), three-dimensional porous structure and intrinsic hydrophobicity (to inhibit parasitic hydrogen evolution reaction, HER). In this article, we reviewed latest progresses toward aerogels for CO<sub>2</sub>ER, including (1) synthesis strategies of carbon-based aerogels and metallic aerogels; (2) innovations in aerogels design, such as heteroatom doping and metal incorporation in carbon-based aerogel, creating grain boundaries, regulating Cu<sup>0</sup>–Cu<sup>+</sup> interfaces, and optimizing synergistic effect in metal aerogels; and (3) structural properties of aerogel catalysts to enhance CO<sub>2</sub>ER performance. Finally, we discuss the challenges, possible solutions and future directions for further development of aerogels in CO<sub>2</sub>ER.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101038"},"PeriodicalIF":7.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-06DOI: 10.1016/j.mtsust.2024.101040
Gabriela A. Nogueira , Laís G. Fregolente , Lorena S. Pereira , Márcio J. Laranja , Altair B. Moreira , Odair P. Ferreira , Márcia C. Bisinoti
The presence of hexavalent chromium (Cr (VI)) in effluents remains a global concern due to its toxic properties. Even though adsorption has been employed for its removal from water, developing sustainable materials with higher adsorption capacities is still pivotal to tackling such contamination. In this study, two magnetic carbons (MC) were produced by hydrothermal carbonization (HTC) of sugarcane bagasse in the presence of iron (III) nitrate at 230 and 270 °C. Both MCs were thermochemically activated at 500 and 700 °C using KOH (1:2; w:w). The materials were characterized in terms of composition, structure, morphology, texture, and surface properties and then evaluated in adsorption studies of Cr (VI). After HTC, some iron phases such as α-Fe2O3, γ-Fe2O3, and Fe3O4 were observed, while thermochemical activation additionally revealed Fe0 and Fe4[Fe(CN)6]3. Activation increased the amount of meso- and macropores, specific surface area, pHzpc, surface hydrophilicity, and carbon and nitrogen contents. The adsorption kinetics study indicated that the pseudo-second-order model describes better the behavior of the materials. The investigation of adsorbent dose showed that doses below 1.00 g L−1 were more efficient in Cr (VI) removal. MC-230 and MC-270 thermochemically activated at 700 °C exhibited the highest Cr (VI) adsorption capacities (10.5 and 15.5 mg g−1, respectively). Therefore, the improved adsorption capacity for Cr (VI) of the materials thermochemically activated at 700 °C was mainly due to their enhanced textural properties.
由于六价铬（Cr (VI)）的毒性，其在污水中的存在仍然是一个全球关注的问题。尽管吸附技术已被用于去除水中的六价铬，但开发吸附能力更强的可持续材料仍是解决此类污染的关键。在本研究中，甘蔗渣在硝酸铁（III）存在下于 230 和 270 °C 下通过水热碳化（HTC）制备了两种磁性碳（MC）。两种 MC 均在 500 和 700 °C 下使用 KOH（1:2；w:w）进行热化学活化。对材料的组成、结构、形态、质地和表面特性进行了表征，然后在 Cr (VI) 吸附研究中进行了评估。在 HTC 之后，观察到一些铁相，如 α-Fe2O3、γ-Fe2O3 和 Fe3O4，而热化学活化还发现了 Fe0 和 Fe4[Fe(CN)6]3。活化增加了中孔和大孔的数量、比表面积、pHzpc、表面亲水性以及碳和氮的含量。吸附动力学研究表明，伪二阶模型能更好地描述材料的行为。对吸附剂剂量的研究表明，低于 1.00 g L-1 的剂量对六价铬的去除更有效。在 700 °C 下热化学活化的 MC-230 和 MC-270 对六价铬的吸附容量最高（分别为 10.5 和 15.5 mg g-1）。因此，在 700 ℃ 下热化学活化的材料对六价铬的吸附能力提高主要是由于它们的质构特性增强了。
{"title":"Magnetic activated carbonaceous materials from sugarcane bagasse: Preparation, characterization, and hexavalent chromium removal","authors":"Gabriela A. Nogueira , Laís G. Fregolente , Lorena S. Pereira , Márcio J. Laranja , Altair B. Moreira , Odair P. Ferreira , Márcia C. Bisinoti","doi":"10.1016/j.mtsust.2024.101040","DOIUrl":"10.1016/j.mtsust.2024.101040","url":null,"abstract":"<div><div>The presence of hexavalent chromium (Cr (VI)) in effluents remains a global concern due to its toxic properties. Even though adsorption has been employed for its removal from water, developing sustainable materials with higher adsorption capacities is still pivotal to tackling such contamination. In this study, two magnetic carbons (MC) were produced by hydrothermal carbonization (HTC) of sugarcane bagasse in the presence of iron (III) nitrate at 230 and 270 °C. Both MCs were thermochemically activated at 500 and 700 °C using KOH (1:2; w:w). The materials were characterized in terms of composition, structure, morphology, texture, and surface properties and then evaluated in adsorption studies of Cr (VI). After HTC, some iron phases such as α-Fe<sub>2</sub>O<sub>3</sub>, γ-Fe<sub>2</sub>O<sub>3</sub>, and Fe<sub>3</sub>O<sub>4</sub> were observed, while thermochemical activation additionally revealed Fe<sup>0</sup> and Fe<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>. Activation increased the amount of meso- and macropores, specific surface area, pH<sub>zpc</sub>, surface hydrophilicity, and carbon and nitrogen contents. The adsorption kinetics study indicated that the pseudo-second-order model describes better the behavior of the materials. The investigation of adsorbent dose showed that doses below 1.00 g L<sup>−1</sup> were more efficient in Cr (VI) removal. MC-230 and MC-270 thermochemically activated at 700 °C exhibited the highest Cr (VI) adsorption capacities (10.5 and 15.5 mg g<sup>−1</sup>, respectively). Therefore, the improved adsorption capacity for Cr (VI) of the materials thermochemically activated at 700 °C was mainly due to their enhanced textural properties.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101040"},"PeriodicalIF":7.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-04DOI: 10.1016/j.mtsust.2024.101024
Yi-Chun Chen , Xin-Yu Jiang , Jechan Lee , Ha Manh Bui , Young-Kwon Park , Haitao Wang , Wei-Hsin Chen , Chechia Hu , Kun-Yi Andrew Lin
Addressing the global need for sustainable chemical processes, this study introduces an innovative Woven Hybrid Membrane (WHM) specifically designed for the efficient oxidation of vanillyl alcohol (VAA) to vanillin (VLN). This transformation is crucial for converting lignocellulosic biomass into valuable chemical products, aligning with sustainable development goals. Utilizing a novel catalytic system that combines 2,2,6,6-tetramethylpiperidine 1-oxyl (TMP) and copper on a unique mesh-like structure, the WHM enhances both the economic and environmental viability of the process. This design not only overcomes the limitations of powdered catalysts, which are challenging to recover and reuse, but also promotes high catalytic efficiency and selectivity. By employing oxygen as the oxidant, our system maintains near 100% selectivity for VLN, demonstrating high conversion rates across multiple cycles without significant degradation in performance. Advanced analytical techniques, including electrochemical analysis and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), were used to explore the catalyst's functionality and the reaction mechanism. The results confirm the stability and effectiveness of the WHM, showcasing its potential as a reusable, highly efficient, and environmentally friendly catalyst. This research represents a significant step forward in the field of sustainable industrial chemistry, offering a robust solution for the bio-refinery industry's push towards greener processes.
{"title":"Constructing organic-inorganic woven hybrid membrane for highly-selective catalytic conversion of lignin-based phenolic molecule to value-added products","authors":"Yi-Chun Chen , Xin-Yu Jiang , Jechan Lee , Ha Manh Bui , Young-Kwon Park , Haitao Wang , Wei-Hsin Chen , Chechia Hu , Kun-Yi Andrew Lin","doi":"10.1016/j.mtsust.2024.101024","DOIUrl":"10.1016/j.mtsust.2024.101024","url":null,"abstract":"<div><div>Addressing the global need for sustainable chemical processes, this study introduces an innovative Woven Hybrid Membrane (WHM) specifically designed for the efficient oxidation of vanillyl alcohol (VAA) to vanillin (VLN). This transformation is crucial for converting lignocellulosic biomass into valuable chemical products, aligning with sustainable development goals. Utilizing a novel catalytic system that combines 2,2,6,6-tetramethylpiperidine 1-oxyl (TMP) and copper on a unique mesh-like structure, the WHM enhances both the economic and environmental viability of the process. This design not only overcomes the limitations of powdered catalysts, which are challenging to recover and reuse, but also promotes high catalytic efficiency and selectivity. By employing oxygen as the oxidant, our system maintains near 100% selectivity for VLN, demonstrating high conversion rates across multiple cycles without significant degradation in performance. Advanced analytical techniques, including electrochemical analysis and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), were used to explore the catalyst's functionality and the reaction mechanism. The results confirm the stability and effectiveness of the WHM, showcasing its potential as a reusable, highly efficient, and environmentally friendly catalyst. This research represents a significant step forward in the field of sustainable industrial chemistry, offering a robust solution for the bio-refinery industry's push towards greener processes.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101024"},"PeriodicalIF":7.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.mtsust.2024.101036
Hongqiang Ma , Congcong Fu , Jialong Wu , Xinhua Yuan , Chao Wu , Jingjing Feng
Based on X-CT, MIP, and SEM tests, the micro/meso scales evolutions of alkali-activated fly ash-slag (AAFS) concrete under sustained high temperatures are studied. The results show that the water loss of the C–S–H and C-A-S-H gel phases at 60 °C is continuous (about 60d). The variation law of meso-scale pore volume based on the X-CT test is consistent with that of micro-scale pore volume obtained by the MIP test. The 2D fractal dimension can be used to qualitatively evaluate the internal micro-cracks and microstructure complexity of AAFS concrete after sustained high-temperature action. The mass loss rate can reach stability within 3d-7d under the action of 100 °C, 150 °C, and 200 °C, and there is no cumulative effect of micro-cracks and pores caused by initial water loss. Under sustained high-temperatures, the internal pore structure, micro-cracks, and microstructure changes of AAFS concrete are persistent, and these persistent changes lead to a significant change in the mechanical properties of AAFS concrete.
{"title":"Micro/meso scales characterization of alkali-activated fly ash-slag concrete under sustained high-temperatures with X-CT, MIP, and SEM tests","authors":"Hongqiang Ma , Congcong Fu , Jialong Wu , Xinhua Yuan , Chao Wu , Jingjing Feng","doi":"10.1016/j.mtsust.2024.101036","DOIUrl":"10.1016/j.mtsust.2024.101036","url":null,"abstract":"<div><div>Based on X-CT, MIP, and SEM tests, the micro/meso scales evolutions of alkali-activated fly ash-slag (AAFS) concrete under sustained high temperatures are studied. The results show that the water loss of the C–S–H and C-A-S-H gel phases at 60 °C is continuous (about 60d). The variation law of meso-scale pore volume based on the X-CT test is consistent with that of micro-scale pore volume obtained by the MIP test. The 2D fractal dimension can be used to qualitatively evaluate the internal micro-cracks and microstructure complexity of AAFS concrete after sustained high-temperature action. The mass loss rate can reach stability within 3d-7d under the action of 100 °C, 150 °C, and 200 °C, and there is no cumulative effect of micro-cracks and pores caused by initial water loss. Under sustained high-temperatures, the internal pore structure, micro-cracks, and microstructure changes of AAFS concrete are persistent, and these persistent changes lead to a significant change in the mechanical properties of AAFS concrete.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101036"},"PeriodicalIF":7.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.mtsust.2024.101030
Umm-e Rubab , Ali Haider , Iram Shahzadi , Anwar Ul-Hamid , Hameed Ullah , Sherdil Khan , Atif Shahbaz , Ahmed M. Fouda , Muhammad Ikram
This study demonstrates the synthesis of co-precipitated cadmium selenide (CdSe) quantum dots (QDs) doped with (2 and 4 wt %) of silver (Ag) and fixed quantity of graphitic carbon nitride (g-C3N4) for catalytic as well as antibacterial potential with molecular docking (MD) analysis. Comprehensive characterizations investigated the structural composition, surface morphology, elemental composition, and optical properties. XRD revealed the multiple phases (hexagonal and cubic) of CdSe with a notable rise in the diffraction peaks intensity upon doping. The optical studies demonstrated the range of absorption peaks, which increased upon doping confirmed through band gap energies significantly altered. TEM study revealed that a sheet of g-C3N4 overlapped with CdSe QDs, and certain nanorod-like structures emerged after Ag doping. HR-TEM was employed for the d-spacing computation of prepared samples and exposed a decreasing trend as the Ag concentration increased. Furthermore, the catalytic activity (CA) performed against RhB dye showed maximum results in the acidic medium with a higher concentration of Ag into g-C3N4 doped CdSe. The efficient bactericidal efficacy was evaluated against S. aureus bacteria with the highest inhibition zone of 13.75 mm for 4% Ag doping, which was further explained by investigating their inhibitory effects on DNA gyrase and tyrosyl-tRNA synthetase via MD.
本研究通过分子对接（MD）分析，证明了掺杂了（2 和 4 wt %）银（Ag）和固定数量氮化石墨碳（g-C3N4）的共沉淀硒化镉（CdSe）量子点（QDs）的合成，以提高其催化和抗菌潜力。对其结构组成、表面形貌、元素组成和光学特性进行了全面的表征研究。XRD 显示了硒化镉的多相（六方和立方），掺杂后衍射峰强度显著增加。光学研究显示了吸收峰的范围，掺杂后带隙能的显著变化证实了吸收峰的增加。TEM 研究表明，g-C3N4 薄片与 CdSe QD 重叠，掺杂 Ag 后出现了某些纳米棒状结构。利用 HR-TEM 对制备的样品进行了 d-间距计算，结果表明随着 Ag 浓度的增加，d-间距呈下降趋势。此外，对 RhB 染料的催化活性（CA）显示，在酸性介质中，掺入 g-C3N4 CdSe 的 Ag 浓度越高，催化活性越大。通过 MD 研究其对 DNA 回旋酶和酪氨酸-tRNA 合成酶的抑制作用，进一步解释了其对金黄色葡萄球菌的高效杀菌效果。
{"title":"Assessment of silver and graphitic carbon nitride doped cadmium selenide quantum dots as an efficient dye degrader and antibacterial agent: In silico molecular docking analysis","authors":"Umm-e Rubab , Ali Haider , Iram Shahzadi , Anwar Ul-Hamid , Hameed Ullah , Sherdil Khan , Atif Shahbaz , Ahmed M. Fouda , Muhammad Ikram","doi":"10.1016/j.mtsust.2024.101030","DOIUrl":"10.1016/j.mtsust.2024.101030","url":null,"abstract":"<div><div>This study demonstrates the synthesis of co-precipitated cadmium selenide (CdSe) quantum dots (QDs) doped with (2 and 4 wt %) of silver (Ag) and fixed quantity of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) for catalytic as well as antibacterial potential with molecular docking (MD) analysis. Comprehensive characterizations investigated the structural composition, surface morphology, elemental composition, and optical properties. XRD revealed the multiple phases (hexagonal and cubic) of CdSe with a notable rise in the diffraction peaks intensity upon doping. The optical studies demonstrated the range of absorption peaks, which increased upon doping confirmed through band gap energies significantly altered. TEM study revealed that a sheet of g-C<sub>3</sub>N<sub>4</sub> overlapped with CdSe QDs, and certain nanorod-like structures emerged after Ag doping. HR-TEM was employed for the d-spacing computation of prepared samples and exposed a decreasing trend as the Ag concentration increased. Furthermore, the catalytic activity (CA) performed against RhB dye showed maximum results in the acidic medium with a higher concentration of Ag into g-C<sub>3</sub>N<sub>4</sub> doped CdSe. The efficient bactericidal efficacy was evaluated against <em>S. aureus</em> bacteria with the highest inhibition zone of 13.75 mm for 4% Ag doping, which was further explained by investigating their inhibitory effects on DNA gyrase and tyrosyl-tRNA synthetase via MD.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101030"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.mtsust.2024.101023
Songhua Ma , Linxuan Jiang , Wenjie Yang , Fan Liu , Devin Wang , Feng Wang , Jun Huang
Malignant tumours have become one of the most serious diseases threatening human health, and their incidence is increasing every year. Improving the effectiveness of treatment for this disease is an important research topic in the related interdisciplinary fields of medicine, pharmacy and chemistry. Traditional therapies for tumours mainly include chemotherapy, radiotherapy and surgery, but these methods have shortcomings such as insufficient efficacy, low specificity and serious side effects, and thus the therapeutic effect is not satisfactory. In recent years, the emerging tumour therapies have made great progress, such as photothermal therapy (PTT) and photodynamic therapy (PDT) which possess the advantages of high efficacy, good selectivity and few side effects. Nanomaterial-based photocatalysis agents have attracted much attention in the field of PTT/PDT therapy due to the high photoconversion efficiency, easy modification, high tumour selectivity and good biocompatibility. In this review, we briefly summarize and introduce the advances of common photothermal agents and photosensitizer in tumor photocatalysis therapy in recent years, including noble nanomaterials, semiconductor nanomaterials, carbon-based nanomaterials and polymer-based nanomaterials. Furthermore, the challenges of photothermal agents, photosensitizers and PTT/PDT combined therapy in antitumour therapy applications are discussed. It is believed that the development of photothermal agents and photosensitizer with high tissue penetration capacity, high photothermal efficiency and safety will have a promising future in clinical photocatalysis tumour therapy.
{"title":"Advances of Nanomaterials in Cancer Photocatalysis Therapy","authors":"Songhua Ma , Linxuan Jiang , Wenjie Yang , Fan Liu , Devin Wang , Feng Wang , Jun Huang","doi":"10.1016/j.mtsust.2024.101023","DOIUrl":"10.1016/j.mtsust.2024.101023","url":null,"abstract":"<div><div>Malignant tumours have become one of the most serious diseases threatening human health, and their incidence is increasing every year. Improving the effectiveness of treatment for this disease is an important research topic in the related interdisciplinary fields of medicine, pharmacy and chemistry. Traditional therapies for tumours mainly include chemotherapy, radiotherapy and surgery, but these methods have shortcomings such as insufficient efficacy, low specificity and serious side effects, and thus the therapeutic effect is not satisfactory. In recent years, the emerging tumour therapies have made great progress, such as photothermal therapy (PTT) and photodynamic therapy (PDT) which possess the advantages of high efficacy, good selectivity and few side effects. Nanomaterial-based photocatalysis agents have attracted much attention in the field of PTT/PDT therapy due to the high photoconversion efficiency, easy modification, high tumour selectivity and good biocompatibility. In this review, we briefly summarize and introduce the advances of common photothermal agents and photosensitizer in tumor photocatalysis therapy in recent years, including noble nanomaterials, semiconductor nanomaterials, carbon-based nanomaterials and polymer-based nanomaterials. Furthermore, the challenges of photothermal agents, photosensitizers and PTT/PDT combined therapy in antitumour therapy applications are discussed. It is believed that the development of photothermal agents and photosensitizer with high tissue penetration capacity, high photothermal efficiency and safety will have a promising future in clinical photocatalysis tumour therapy.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"29 ","pages":"Article 101023"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.mtsust.2024.101025
Qidong Wang , Fangjun Yu , Shaoyong Zhang , Weihong Zheng , Jizhen Shang , Shuai Li , Hua Wang , Yu Shu , Zhaohang Yang , Hiroshi Uyama , Guojiang Mao
The construction of hydrophobic porous adsorption materials, which are cost-effective, green, stable, and efficient, are urgently demanded for the large-scale and effective oily wastewater treatment. Herein, a facile and low-cost two-step fabrication strategy of hydrophobic melamine foam (MF) was demonstrated, including cellulose acetate (CA) decoration and siloxane modification. Cellulose acetate initially assembled on the skeleton of MF with the aid of hydrogen bond formation between the hydroxyl groups of CA and imimo groups of MF. At an optimal concentration of CA, the as-prepared composite foam (CA/MF) exhibited good hydrophobicity. To further improve the oil/water selectivity, the above foam was enhanced by chemical vapor deposition (CVD) of methyltrimethoxysilane (MTMS). The successful silicification reaction between CA/MF and MTMS decreased the surface energy and improved the surface topological structure, leading to excellent hydrophobicity (water contact angle of 147.4°) and superoliophilicty. Such hydrophobized cellulose acetate/melamine foam (H-CA/MF) presented low density, favorable porosity (97.78%), and distinguished pore volume (88.66 mL/g), leading to a high oil adsorption capacity of up to 56.6 g/g. Due to the excellent mechanical elasticity of H-CA/MF, the oil absorption and recovery can be achieved easily by a simple manual adsorption-squeezing method and lab-made pump-assisted separation device with satisfactory recyclability. Moreover, H-CA/MF displayed marvelous stability and environmental adaptability in different harsh environment, further enlarging its practical application scenarios. Along with the green and cost-effective preparation process, the present study provides a facile strategy to fabricate hydrophobized melamine-based foam, which is of great significance for scalable and efficient oil/water separation.
构建经济、绿色、稳定、高效的疏水多孔吸附材料是大规模有效处理含油废水的迫切需求。本文展示了一种简便、低成本的疏水性三聚氰胺泡沫（MF）两步制备策略，包括醋酸纤维素（CA）装饰和硅氧烷改性。醋酸纤维素最初借助 CA 的羟基和三聚氰胺泡沫的亚氨基之间形成的氢键组装在三聚氰胺泡沫的骨架上。在 CA 的最佳浓度下，制备的复合泡沫（CA/MF）具有良好的疏水性。为了进一步提高油/水选择性，上述泡沫通过化学气相沉积（CVD）甲基三甲氧基硅烷（MTMS）得到了增强。CA/MF 与 MTMS 之间成功的硅化反应降低了表面能，改善了表面拓扑结构，从而获得了优异的疏水性（水接触角为 147.4°）和超亲油性。这种疏水性醋酸纤维素/三聚氰胺泡沫（H-CA/MF）密度低、孔隙率高（97.78%）、孔容积大（88.66 mL/g），因此吸油量高达 56.6 g/g。由于 H-CA/MF 具有优异的机械弹性，因此可通过简单的手动吸附-挤压方法和实验室自制的泵辅助分离装置轻松实现吸油和回收，并具有令人满意的可回收性。此外，H-CA/MF 在不同的恶劣环境中都表现出了出色的稳定性和环境适应性，进一步扩大了其实际应用范围。本研究采用绿色、低成本的制备工艺，提供了一种制造疏水性三聚氰胺基泡沫的简便策略，对实现可扩展的高效油水分离具有重要意义。
{"title":"Cellulose acetate-decorated and siloxane-modified hydrophobic melamine foam with excellent selectivity and durability for efficient oil/water separation","authors":"Qidong Wang , Fangjun Yu , Shaoyong Zhang , Weihong Zheng , Jizhen Shang , Shuai Li , Hua Wang , Yu Shu , Zhaohang Yang , Hiroshi Uyama , Guojiang Mao","doi":"10.1016/j.mtsust.2024.101025","DOIUrl":"10.1016/j.mtsust.2024.101025","url":null,"abstract":"<div><div>The construction of hydrophobic porous adsorption materials, which are cost-effective, green, stable, and efficient, are urgently demanded for the large-scale and effective oily wastewater treatment. Herein, a facile and low-cost two-step fabrication strategy of hydrophobic melamine foam (MF) was demonstrated, including cellulose acetate (CA) decoration and siloxane modification. Cellulose acetate initially assembled on the skeleton of MF with the aid of hydrogen bond formation between the hydroxyl groups of CA and imimo groups of MF. At an optimal concentration of CA, the as-prepared composite foam (CA/MF) exhibited good hydrophobicity. To further improve the oil/water selectivity, the above foam was enhanced by chemical vapor deposition (CVD) of methyltrimethoxysilane (MTMS). The successful silicification reaction between CA/MF and MTMS decreased the surface energy and improved the surface topological structure, leading to excellent hydrophobicity (water contact angle of 147.4°) and superoliophilicty. Such hydrophobized cellulose acetate/melamine foam (H-CA/MF) presented low density, favorable porosity (97.78%), and distinguished pore volume (88.66 mL/g), leading to a high oil adsorption capacity of up to 56.6 g/g. Due to the excellent mechanical elasticity of H-CA/MF, the oil absorption and recovery can be achieved easily by a simple manual adsorption-squeezing method and lab-made pump-assisted separation device with satisfactory recyclability. Moreover, H-CA/MF displayed marvelous stability and environmental adaptability in different harsh environment, further enlarging its practical application scenarios. Along with the green and cost-effective preparation process, the present study provides a facile strategy to fabricate hydrophobized melamine-based foam, which is of great significance for scalable and efficient oil/water separation.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101025"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.mtsust.2024.101037
Xiao-Ping Zheng , Meng Li , Yu Chai , Ya-Peng Du , Yu-Cang Zhang , Yan-Zhen Zheng
Substituting renewable lignocellulose for fossil fuels is crucial for economic development and environmental protection. Deep eutectic solvents (DESs) demonstrate efficacy in facilitating the fractionation of high-purity lignin and cellulose during lignocellulose pretreatment. In this study, agricultural by-product passion fruit husks underwent pretreatment using DESs comprised of choline chloride (ChCl) and organic acids, aiming to efficiently separate cellulose and lignin. Among the various DESs tested, ChCl combined with lactic acid (LA) exhibited optimal performance in the pretreatment process. This combination demonstrated a remarkable synergistic effect in breaking down the lignin-carbohydrate complex bonds and deconstructing passion fruit husks. Characterizations of the cellulose rich solid residues were performed using FTIR, SEM, and XRD techniques, confirming the effectiveness of lignin removal and cellulose retention through the pretreatment. The regenerated lignin exhibited homogeneous distribution and well-preserved structure, as evidenced by 2D-HSQC analysis. Furthermore, it displayed notable antioxidant activity and antibacterial property. The mechanism underlying the pretreatment was elucidated through density functional theory (DFT) calculations, confirming hydrogen-bond interactions between DESs and lignin, which positively contributed to lignin dissolution. Additionally, hydrogen-bond properties between DESs and lignin were also revealed.
用可再生木质纤维素替代化石燃料对经济发展和环境保护至关重要。在木质纤维素预处理过程中，深共晶溶剂（DES）在促进高纯度木质素和纤维素的分馏方面表现出了功效。本研究使用氯化胆碱（ChCl）和有机酸组成的 DESs 对农副产品百香果壳进行预处理，旨在有效分离纤维素和木质素。在测试的各种 DES 中，氯化胆碱与乳酸（LA）的组合在预处理过程中表现出最佳性能。这种组合在分解木质素-碳水化合物复合键和解构百香果外皮方面表现出了显著的协同效应。利用傅立叶变换红外光谱（FTIR）、扫描电镜（SEM）和 XRD 技术对富含纤维素的固体残留物进行了表征，证实了通过预处理去除木质素和保留纤维素的效果。2D-HSQC 分析表明，再生木质素分布均匀，结构保存完好。此外，它还具有显著的抗氧化活性和抗菌特性。通过密度泛函理论（DFT）计算阐明了预处理的机理，证实了 DESs 与木质素之间的氢键相互作用，这对木质素的溶解起到了积极作用。此外，还揭示了 DESs 与木质素之间的氢键特性。
{"title":"Efficient pretreatment of passion fruit husks using choline chloride based deep eutectic solvents","authors":"Xiao-Ping Zheng , Meng Li , Yu Chai , Ya-Peng Du , Yu-Cang Zhang , Yan-Zhen Zheng","doi":"10.1016/j.mtsust.2024.101037","DOIUrl":"10.1016/j.mtsust.2024.101037","url":null,"abstract":"<div><div>Substituting renewable lignocellulose for fossil fuels is crucial for economic development and environmental protection. Deep eutectic solvents (DESs) demonstrate efficacy in facilitating the fractionation of high-purity lignin and cellulose during lignocellulose pretreatment. In this study, agricultural by-product passion fruit husks underwent pretreatment using DESs comprised of choline chloride (ChCl) and organic acids, aiming to efficiently separate cellulose and lignin. Among the various DESs tested, ChCl combined with lactic acid (LA) exhibited optimal performance in the pretreatment process. This combination demonstrated a remarkable synergistic effect in breaking down the lignin-carbohydrate complex bonds and deconstructing passion fruit husks. Characterizations of the cellulose rich solid residues were performed using FTIR, SEM, and XRD techniques, confirming the effectiveness of lignin removal and cellulose retention through the pretreatment. The regenerated lignin exhibited homogeneous distribution and well-preserved structure, as evidenced by 2D-HSQC analysis. Furthermore, it displayed notable antioxidant activity and antibacterial property. The mechanism underlying the pretreatment was elucidated through density functional theory (DFT) calculations, confirming hydrogen-bond interactions between DESs and lignin, which positively contributed to lignin dissolution. Additionally, hydrogen-bond properties between DESs and lignin were also revealed.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101037"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.mtsust.2024.101029
Emmanuel Abu-Danso , Nick Weingart , Tobias Standau , Volker Altstädt , Jussi V.K. Kukkonen , Holger Ruckdäschel
Emerging water pollutants pose a serious threat to the ecosystem function. To avert this, efficient remedial and preventive measures that also protect the environment are required. The use of sustainable materials as alternatives to water treatment systems has become a global focus due to their ‘fit-for-purpose’ potential. This study reports on a process engineered water regenerable nanocomposite (PLA@HNT) from polylactide (PLA) and Halloysite (HNT) for the removal of aqueous phase Tetracycline (TC). PLA was surface etched with NaOH to activate carboxylates, hydroxyls and enhance hydrophilicity. HNT was hydrothermally treated with CO(NH2)2 for basal spacing as well as access to activated inner Al–OH and Si–OH functional groups. The modified materials were reacted via melt extrusion to obtain a surface responsive PLA@HNT which was subsequently applied as an adsorbent for selective TC adsorption in a fixed bed column system at 1 ml min−1 and 2 ml min−1 flow rates. The maximum capacity (qbed) was found to be 0.05 mmol g−1. Hyphenations of Ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometer (UHR FT-ICR-MS) and other analytical techniques were used to investigate aspects of PLA@HNT before and after application. Collision induced dissociation (CID) analysis found only residual TC and no degradation products in the effluent after removal studies. Furthermore, PLA@HNT can be reused over 4 adsorption cycles with water as eluent.
{"title":"Processing of water regenerable PLA@HNT nanocomposite via melt extrusion for selective adsorption of aqueous phase tetracycline","authors":"Emmanuel Abu-Danso , Nick Weingart , Tobias Standau , Volker Altstädt , Jussi V.K. Kukkonen , Holger Ruckdäschel","doi":"10.1016/j.mtsust.2024.101029","DOIUrl":"10.1016/j.mtsust.2024.101029","url":null,"abstract":"<div><div>Emerging water pollutants pose a serious threat to the ecosystem function. To avert this, efficient remedial and preventive measures that also protect the environment are required. The use of sustainable materials as alternatives to water treatment systems has become a global focus due to their ‘fit-for-purpose’ potential. This study reports on a process engineered water regenerable nanocomposite (PLA@HNT) from polylactide (PLA) and Halloysite (HNT) for the removal of aqueous phase Tetracycline (TC). PLA was surface etched with NaOH to activate carboxylates, hydroxyls and enhance hydrophilicity. HNT was hydrothermally treated with CO(NH<sub>2</sub>)<sub>2</sub> for basal spacing as well as access to activated inner Al–OH and Si–OH functional groups. The modified materials were reacted <em>via</em> melt extrusion to obtain a surface responsive PLA@HNT which was subsequently applied as an adsorbent for selective TC adsorption in a fixed bed column system at 1 ml min<sup>−1</sup> and 2 ml min<sup>−1</sup> flow rates. The maximum capacity (q<sub>bed</sub>) was found to be 0.05 mmol g<sup>−1</sup>. Hyphenations of Ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometer (UHR FT-ICR-MS) and other analytical techniques were used to investigate aspects of PLA@HNT before and after application. Collision induced dissociation (CID) analysis found only residual TC and no degradation products in the effluent after removal studies. Furthermore, PLA@HNT can be reused over 4 adsorption cycles with water as eluent.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101029"},"PeriodicalIF":7.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.mtsust.2024.101031
Muhammad Ikram , Ali Haider , Muhammad Bilal , Anwar Ul-Hamid , Souraya Goumri-Said , Mohammed Benali Kanoun , El Sayed Yousef , Salamat Ali
Water pollution, exacerbated by inadequate water management practices, has compromised the effectiveness of traditional water treatment technologies. The integration of metal oxide-based nanomaterials in treatment systems has the potential to revolutionize the field of wastewater treatment, providing a sustainable and efficient solution to the growing global water crisis. This study focused on the fabrication of hexagonal cesium (Cs) doped MoO3 nanostructures (NSs) for their potential use as catalytic and antibacterial agents. Various structural, optical, and morphological analysis was conducted to examine these NSs. The UV–Vis spectroscopy results showed that as Cs concentration increased, the band gap energies of MoO3 decreased from 3.5 eV to 3.0 eV. The field emission scanning electron microscopy (FESEM) investigation revealed the plate-like structural morphology of MoO3 formed by overlapping one layer onto another. Cs doping effectively inhibited the recombination of photo-generated charge carriers, resulting in a significant reduction in PL peak intensity for Cs-doped MoO3 compared to MoO3. The prepared NS-reduced methylene blue dye in the absence of light under different pH conditions, reaching 86.8% with 2% Cs-doped MoO3. Density functional theory (DFT), utilizing the Heyd-Scuseria-Ernzerhof hybrid (HSE06) method, was employed to model and compute the interactions between methylene blue (MB) and Cs-doped MoO3 during MB adsorption. Bactericidal experiments on multidrug-resistant Escherichia coli showed that the NSs had remarkable antibacterial action, generating an inhibition zone of 9.15 mm at higher doses using 6% Cs-doped MoO3. Consequently, these findings offer potential significance for research in developing and implementing wastewater disinfection systems.
{"title":"Investigating the catalytic and antibacterial behavior of cesium-doped MoO3 nanostructures against methylene blue dye and MDR E. coli with DFT analysis","authors":"Muhammad Ikram , Ali Haider , Muhammad Bilal , Anwar Ul-Hamid , Souraya Goumri-Said , Mohammed Benali Kanoun , El Sayed Yousef , Salamat Ali","doi":"10.1016/j.mtsust.2024.101031","DOIUrl":"10.1016/j.mtsust.2024.101031","url":null,"abstract":"<div><div>Water pollution, exacerbated by inadequate water management practices, has compromised the effectiveness of traditional water treatment technologies. The integration of metal oxide-based nanomaterials in treatment systems has the potential to revolutionize the field of wastewater treatment, providing a sustainable and efficient solution to the growing global water crisis. This study focused on the fabrication of hexagonal cesium (Cs) doped MoO<sub>3</sub> nanostructures (NSs) for their potential use as catalytic and antibacterial agents. Various structural, optical, and morphological analysis was conducted to examine these NSs. The UV–Vis spectroscopy results showed that as Cs concentration increased, the band gap energies of MoO<sub>3</sub> decreased from 3.5 eV to 3.0 eV. The field emission scanning electron microscopy (FESEM) investigation revealed the plate-like structural morphology of MoO<sub>3</sub> formed by overlapping one layer onto another. Cs doping effectively inhibited the recombination of photo-generated charge carriers, resulting in a significant reduction in PL peak intensity for Cs-doped MoO<sub>3</sub> compared to MoO<sub>3</sub>. The prepared NS-reduced methylene blue dye in the absence of light under different pH conditions, reaching 86.8% with 2% Cs-doped MoO<sub>3</sub>. Density functional theory (DFT), utilizing the Heyd-Scuseria-Ernzerhof hybrid (HSE06) method, was employed to model and compute the interactions between methylene blue (MB) and Cs-doped MoO<sub>3</sub> during MB adsorption. Bactericidal experiments on multidrug-resistant <em>Escherichia coli</em> showed that the NSs had remarkable antibacterial action, generating an inhibition zone of 9.15 mm at higher doses using 6% Cs-doped MoO<sub>3</sub>. Consequently, these findings offer potential significance for research in developing and implementing wastewater disinfection systems.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101031"},"PeriodicalIF":7.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142577835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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