Amorphous copper slag (CS), a by-product of the matte smelting and refining processes in copper smelting, contains approximately 47 % iron. This study explores the potential of using CS as an iron source to create a photocatalyst composite with TiO2 through calcination at various temperatures (550, 700, 850, and 1000 °C) in order to achieve efficient photocatalytic conversion of glucose to lactic acid under visible light irradiation (λ ≥ 380 nm) at room temperature. All the calcined composites exhibited superior glucose conversion and lactic acid production compared to the uncalcined composite (CT) and pure TiO2. The composite calcined at 700 °C provided the highest yield and selectivity for lactic acid. This improvement is attributed to the optimal ratio of Ti(III)/Ti(IV) and the effective separation of photogenerated electron-hole pairs via the Z-scheme heterojunction in the calcined CT composite. This process contributes to the circular economy by recycling waste materials to produce higher-value-added chemicals from biomass using sustainable energy sources.
{"title":"Transforming temperature effects on TiO2/iron oxide composite derived from copper slag as a photocatalyst for glucose conversion","authors":"Jirawat Trakulmututa , Chitiphon Chuaicham , Assadawoot Srikhaow , Keiko Sasaki","doi":"10.1016/j.susmat.2024.e01129","DOIUrl":"10.1016/j.susmat.2024.e01129","url":null,"abstract":"<div><div>Amorphous copper slag (CS), a by-product of the matte smelting and refining processes in copper smelting, contains approximately 47 % iron. This study explores the potential of using CS as an iron source to create a photocatalyst composite with TiO<sub>2</sub> through calcination at various temperatures (550, 700, 850, and 1000 °C) in order to achieve efficient photocatalytic conversion of glucose to lactic acid under visible light irradiation (λ ≥ 380 nm) at room temperature. All the calcined composites exhibited superior glucose conversion and lactic acid production compared to the uncalcined composite (CT) and pure TiO<sub>2</sub>. The composite calcined at 700 °C provided the highest yield and selectivity for lactic acid. This improvement is attributed to the optimal ratio of Ti<sup>(III)</sup>/Ti<sup>(IV)</sup> and the effective separation of photogenerated electron-hole pairs <em>via</em> the <em>Z</em>-scheme heterojunction in the calcined CT composite. This process contributes to the circular economy by recycling waste materials to produce higher-value-added chemicals from biomass using sustainable energy sources.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01129"},"PeriodicalIF":8.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-25DOI: 10.1016/j.susmat.2024.e01125
Peng Zhao , Cheng Cheng , Ali Abd El-Aty , Jie Tao , Xunzhong Guo , Yuting Ji
The grain size often influences the precision and quality of products manufactured by microforming at the microscale. Macroscale finite element modeling (FEM) cannot accurately predict nonuniform deformation and microstructural evolution at the microscale. In addition, the microscale FEM is challenging for forming processes with complex loading boundary conditions. Thus, in this study, a multiscale framework-based CPFEM is proposed to study the deformation behavior of microtubes manufactured through the 3D-FBF process. The acquired results show that significant nonuniform deformation is caused by greater geometric dimensions and smaller grain sizes, which increase the bending radius of microtubes at the macro level. In addition, a larger offset leads to higher flow stress, larger lattice rotation angles, and consequently, a larger bending radius for the microtube, and grain orientation also influences bending deformation, with easily deformable grain orientations leading to greater stress distribution within the grains.
{"title":"Multiscale framework-based crystal plasticity modeling and texture evolution of the deformation behavior of AISI 304 stainless steel microtubes manufactured through 3D-FBF technology","authors":"Peng Zhao , Cheng Cheng , Ali Abd El-Aty , Jie Tao , Xunzhong Guo , Yuting Ji","doi":"10.1016/j.susmat.2024.e01125","DOIUrl":"10.1016/j.susmat.2024.e01125","url":null,"abstract":"<div><div>The grain size often influences the precision and quality of products manufactured by microforming at the microscale. Macroscale finite element modeling (FEM) cannot accurately predict nonuniform deformation and microstructural evolution at the microscale. In addition, the microscale FEM is challenging for forming processes with complex loading boundary conditions. Thus, in this study, a multiscale framework-based CPFEM is proposed to study the deformation behavior of microtubes manufactured through the 3D-FBF process. The acquired results show that significant nonuniform deformation is caused by greater geometric dimensions and smaller grain sizes, which increase the bending radius of microtubes at the macro level. In addition, a larger offset leads to higher flow stress, larger lattice rotation angles, and consequently, a larger bending radius for the microtube, and grain orientation also influences bending deformation, with easily deformable grain orientations leading to greater stress distribution within the grains.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01125"},"PeriodicalIF":8.6,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.susmat.2024.e01126
Weijun Wu , Junfang Chang , Yanyang He , Zhiyong Guo , Sui Wang , Jie Mao
Conductive hydrogels have broad application prospects in the field of self-powered sensors and energy harvesting devices due to their good electrical conductivity and flexibility. However, at low temperatures, conductive hydrogels are usually frozen, resulting in problems such as poor electrical conductivity and flexibility, which seriously hinder the application of these fields. To address these challenges, phytic acid (PA) was employed as the crosslinker and antifreezing agent in this study. Polyvinyl alcohol (PVA), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), chitosan (CS), and PA were used as raw materials to successfully synthesize PVA/AMPS/CS/PA (PACP) multifunctional conductive hydrogels with outstanding antifreeze and water retention properties (freezing point below −80 °C, 30-day water loss rate of 3.5%). In addition, PACP hydrogels exhibit exceptional electrical conductivity of up to 9.4 S/m, along with antibacterial and biocompatible properties, enabling their utilization as wearable sensors on human skin tissue. Notably, the PACP hydrogel-based triboelectric nanogenerator (PACP-TENG) excels in accurately monitoring human motion and powering small electronic devices, facilitating remote control of small light switches. The resulting open circuit voltage is as high as 314 V at 25 °C and about 110 V at low temperature. Therefore, PACP hydrogels with excellent properties are expected to expand their applications in these fields.
{"title":"Phytic acid-based super antifreeze multifunctional conductive hydrogel for human motion monitoring and energy harvesting devices","authors":"Weijun Wu , Junfang Chang , Yanyang He , Zhiyong Guo , Sui Wang , Jie Mao","doi":"10.1016/j.susmat.2024.e01126","DOIUrl":"10.1016/j.susmat.2024.e01126","url":null,"abstract":"<div><div>Conductive hydrogels have broad application prospects in the field of self-powered sensors and energy harvesting devices due to their good electrical conductivity and flexibility. However, at low temperatures, conductive hydrogels are usually frozen, resulting in problems such as poor electrical conductivity and flexibility, which seriously hinder the application of these fields. To address these challenges, phytic acid (PA) was employed as the crosslinker and antifreezing agent in this study. Polyvinyl alcohol (PVA), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), chitosan (CS), and PA were used as raw materials to successfully synthesize PVA/AMPS/CS/PA (PACP) multifunctional conductive hydrogels with outstanding antifreeze and water retention properties (freezing point below −80 °C, 30-day water loss rate of 3.5%). In addition, PACP hydrogels exhibit exceptional electrical conductivity of up to 9.4 S/m, along with antibacterial and biocompatible properties, enabling their utilization as wearable sensors on human skin tissue. Notably, the PACP hydrogel-based triboelectric nanogenerator (PACP-TENG) excels in accurately monitoring human motion and powering small electronic devices, facilitating remote control of small light switches. The resulting open circuit voltage is as high as 314 V at 25 °C and about 110 V at low temperature. Therefore, PACP hydrogels with excellent properties are expected to expand their applications in these fields.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01126"},"PeriodicalIF":8.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142320284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.susmat.2024.e01127
Xixi Luo , Tao Liu , Changze Wei , Di Lan , Xin Li , Ying Ma , Hui Xie , Fangli Yu , Guanglei Wu
Addressing the issue of low impedance characteristics is essential to improve the electromagnetic wave absorption performance of magnetic materials. Herein, two dimensional Fe3Al@polypyrrole (PPy) lamellae with synergistic magnetic and dielectric properties are fabricated by a mechanical alloying, ordering transformation and polymerization process, which exhibits excellent electromagnetic wave absorption performance. By carefully controlling the thickness of the PPy shell, the optimized Fe3Al@PPy lamellae show a minimum reflection loss of −45.6 dB and an effective absorption bandwidth of 9.1 GHz at a thickness of only 1.5 mm. The conformal growth of Fe3Al@PPy lamellae can induce strong interfacial polarization, dipole polarization, multiple scattering effect and magnetic loss behaviors for the attenuation of electromagnetic waves. This study demonstrates a facile strategy for the development of efficient Fe3Al@PPy composite absorbents showing great potential for practical applications.
{"title":"Synergistically magnetic and dielectric properties of two dimensional Fe3Al@PPy lamellae exhibiting broadband and strong electromagnetic wave absorption","authors":"Xixi Luo , Tao Liu , Changze Wei , Di Lan , Xin Li , Ying Ma , Hui Xie , Fangli Yu , Guanglei Wu","doi":"10.1016/j.susmat.2024.e01127","DOIUrl":"10.1016/j.susmat.2024.e01127","url":null,"abstract":"<div><div>Addressing the issue of low impedance characteristics is essential to improve the electromagnetic wave absorption performance of magnetic materials. Herein, two dimensional Fe<sub>3</sub>Al@polypyrrole (PPy) lamellae with synergistic magnetic and dielectric properties are fabricated by a mechanical alloying, ordering transformation and polymerization process, which exhibits excellent electromagnetic wave absorption performance. By carefully controlling the thickness of the PPy shell, the optimized Fe<sub>3</sub>Al@PPy lamellae show a minimum reflection loss of −45.6 dB and an effective absorption bandwidth of 9.1 GHz at a thickness of only 1.5 mm. The conformal growth of Fe<sub>3</sub>Al@PPy lamellae can induce strong interfacial polarization, dipole polarization, multiple scattering effect and magnetic loss behaviors for the attenuation of electromagnetic waves. This study demonstrates a facile strategy for the development of efficient Fe<sub>3</sub>Al@PPy composite absorbents showing great potential for practical applications.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01127"},"PeriodicalIF":8.6,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.susmat.2024.e01121
R. Suriya, V. Manjusha, M.R. Rajeev, T.S. Anirudhan
Chronic wounds in diabetic patients deteriorate into multiple infections. A multifunctional transdermal material with high self-healing ability, remodeling capability, antibacterial and radicle scavenging activity, and an excellent multi-sensitive carrier was needed to promote wound healing. For that, Oxidized Cellulose (OC) and gelatin (GLN) are selected to construct a dual drug-loaded Schiff base hydrogel with iron nanoparticle (IONPS) incorporation for the controlled and sustained release of Insulin (INS) and Metfomin (MET), which synergistically promote wound repair. The INS/MET-IONPS-OC/GLN hydrogel drug payload was characterized using FT-IR, XRD, DLS, ZETA, TG, FE-SEM, TEM, and VSM analysis. The high drug loading and encapsulation efficiency were 93.20 % and 98.8 % for INS and 90.2 % and 95.1 % for MET, respectively. The temperature-sensitive drug release (92.0 % of INS and 90.0 % of MET) percentage is much better than the pH-sensitive drug release (83.5 % of INS and 80.2 % of MET). Above 90.0 % viability in MTT and apoptosis assay reveals the nontoxic nature of the INS/MET-IONPS-OC/GLN towards L929 normal cell lines. The zone of inhibition value of 12 and 15 mm in gram-negative bacteria reveals the anti-bacterial effect. The antioxidant activity of the carrier shields the cells against reactive oxygen species promotes healing rate ensures by DPPH assay.The cell proliferation and angiogenesis were confirmed by scratch assay on L929 cell lines in diabetic and non-diabetic conditions, showing the healing ability of the INS/MET-IONPS-OC/GLN hydrogel.
{"title":"Synthesis and characterization of a novel dual sensitive iron nanoparticles incorporated Schiff base composite hydrogel for diabetic wound healing therapy","authors":"R. Suriya, V. Manjusha, M.R. Rajeev, T.S. Anirudhan","doi":"10.1016/j.susmat.2024.e01121","DOIUrl":"10.1016/j.susmat.2024.e01121","url":null,"abstract":"<div><div>Chronic wounds in diabetic patients deteriorate into multiple infections. A multifunctional transdermal material with high self-healing ability, remodeling capability, antibacterial and radicle scavenging activity, and an excellent multi-sensitive carrier was needed to promote wound healing. For that, Oxidized Cellulose (OC) and gelatin (GLN) are selected to construct a dual drug-loaded Schiff base hydrogel with iron nanoparticle (IONPS) incorporation for the controlled and sustained release of Insulin (INS) and Metfomin (MET), which synergistically promote wound repair. The INS/MET-IONPS-OC/GLN hydrogel drug payload was characterized using FT-IR, XRD, DLS, ZETA, TG, FE-SEM, TEM, and VSM analysis. The high drug loading and encapsulation efficiency were 93.20 % and 98.8 % for INS and 90.2 % and 95.1 % for MET, respectively. The temperature-sensitive drug release (92.0 % of INS and 90.0 % of MET) percentage is much better than the pH-sensitive drug release (83.5 % of INS and 80.2 % of MET). Above 90.0 % viability in MTT and apoptosis assay reveals the nontoxic nature of the INS/MET-IONPS-OC/GLN towards L929 normal cell lines. The zone of inhibition value of 12 and 15 mm in gram-negative bacteria reveals the anti-bacterial effect. The antioxidant activity of the carrier shields the cells against reactive oxygen species promotes healing rate ensures by DPPH assay.The cell proliferation and angiogenesis were confirmed by scratch assay on L929 cell lines in diabetic and non-diabetic conditions, showing the healing ability of the INS/MET-IONPS-OC/GLN hydrogel.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01121"},"PeriodicalIF":8.6,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-20DOI: 10.1016/j.susmat.2024.e01124
Md Shahjahan Kabir Chowdury , Ye Ji Park , Sung Bum Park , Yong-il Park
With the goal of achieving net zero carbon emissions and the growing scarcity of fossil fuels, significant efforts have been devoted to the development of high-efficiency, low-cost, environmentally friendly, and alternative energy conversion and storage devices. Pristine graphene, consisting of single-atom-thick carbon nanosheets arranged in an sp2 hybridized honeycomb lattice, has emerged as a primary building-block material, including a large surface area, mechanical strength, chemical inertness, and superior electric and thermal properties. Since pristine graphene has a band gap of zero, which significantly limits its applications, modifying graphene by incorporating a heteroatom is a highly effective method to enhance its properties. This approach enhances the suitability and potential of heteroatom-doped graphene as an electrode material in energy conversion and storage devices. This review comprehensively describes the current synthesis advancements in pristine graphene, and heteroatom-doped graphene-based electrocatalysts and/or electrode materials for two types of energy conversion: fuel cells, and water splitting, as well as three frontier energy storage devices, namely supercapacitors and lithium-based various types of batteries. To this end, an exploration of the future prospects, opportunities, and challenges pertaining to the application of graphene and its heteroatom-doped graphene in energy conversion and storage devices is anticipated. This comprehensive review article aims to pave the way for novel advancements and practical utilization of heteroatom-doped graphene-based materials in various domains.
{"title":"Review: Two-dimensional nanostructured pristine graphene and heteroatom-doped graphene-based materials for energy conversion and storage devices","authors":"Md Shahjahan Kabir Chowdury , Ye Ji Park , Sung Bum Park , Yong-il Park","doi":"10.1016/j.susmat.2024.e01124","DOIUrl":"10.1016/j.susmat.2024.e01124","url":null,"abstract":"<div><div>With the goal of achieving net zero carbon emissions and the growing scarcity of fossil fuels, significant efforts have been devoted to the development of high-efficiency, low-cost, environmentally friendly, and alternative energy conversion and storage devices. Pristine graphene, consisting of single-atom-thick carbon nanosheets arranged in an sp<sup>2</sup> hybridized honeycomb lattice, has emerged as a primary building-block material, including a large surface area, mechanical strength, chemical inertness, and superior electric and thermal properties. Since pristine graphene has a band gap of zero, which significantly limits its applications, modifying graphene by incorporating a heteroatom is a highly effective method to enhance its properties. This approach enhances the suitability and potential of heteroatom-doped graphene as an electrode material in energy conversion and storage devices. This review comprehensively describes the current synthesis advancements in pristine graphene, and heteroatom-doped graphene-based electrocatalysts and/or electrode materials for two types of energy conversion: fuel cells, and water splitting, as well as three frontier energy storage devices, namely supercapacitors and lithium-based various types of batteries. To this end, an exploration of the future prospects, opportunities, and challenges pertaining to the application of graphene and its heteroatom-doped graphene in energy conversion and storage devices is anticipated. This comprehensive review article aims to pave the way for novel advancements and practical utilization of heteroatom-doped graphene-based materials in various domains.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01124"},"PeriodicalIF":8.6,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-19DOI: 10.1016/j.susmat.2024.e01122
Tiago J. Ferreira , Catarina Cabral , Thiago O. Carvalho , Joana Pais , Laura M. Esteves , Ludmila P.C. Silva , Patrícia M. Reis , José M.S.S. Esperança , Isabel A.A.C. Esteves
Several strategies can be considered for the mitigation of carbon dioxide (CO2) emissions to the atmosphere, and among them is its post-combustion capture/separation from flue gas emitted from coal-fired power plants. In this work, six imidazolium, ammonium- and DABCO-based ionic liquids (ILs) containing the acetate anion were used to impregnate the metal-organic framework (MOF) ZIF-8. The cationic effect was studied to determine how the different cationic families and side alkyl chain size influence the gas sorption performance of the produced IL@MOF composites. The combination of different characterization techniques confirmed IL impregnation, and that the composite materials were microporous and crystalline. Single-component CO2 and nitrogen (N2) sorption-desorption equilibrium measurements were performed at 303 K for ZIF-8 and the IL@ZIF-8 materials. At the low-pressure regime (0–1 bar), synergy was observed for the imidazolium-based composites, especially for the one with the long-side alkyl chain. The ideal CO2/N2 selectivity was calculated for post-combustion composition, and, at 1 bar, [C10MIM][Ac]@ZIF-8 was over four times more selective than ZIF-8, while the selectivity of [C2MIM][Ac]@ZIF-8 at this pressure almost tripled when compared to the MOF. A chemical reaction between CO2 and the imidazolium ILs explained the results.
为减少大气中的二氧化碳（CO2）排放，可以考虑采用多种策略，其中之一就是从燃煤发电厂排放的烟气中进行燃烧后捕集/分离。在这项研究中，使用了六种含有醋酸阴离子的咪唑、铵和 DABCO 离子液体 (IL) 来浸渍金属有机框架 (MOF) ZIF-8。研究了阳离子效应，以确定不同的阳离子族和侧烷基链大小如何影响所制得的 IL@MOF 复合材料的气体吸附性能。不同表征技术的结合证实了 IL 的浸渍，以及复合材料的微孔性和结晶性。在 303 K 下对 ZIF-8 和 IL@ZIF-8 材料进行了单组分 CO2 和氮（N2）吸附-解吸平衡测量。在低压条件下（0-1 巴），咪唑基复合材料，尤其是具有长侧烷基链的咪唑基复合材料出现了协同效应。在 1 巴的压力下，[C10MIM][Ac]@ZIF-8 的选择性是 ZIF-8 的四倍多，而[C2MIM][Ac]@ZIF-8 在此压力下的选择性几乎是 MOF 的三倍。二氧化碳与咪唑鎓 IL 之间的化学反应解释了上述结果。
{"title":"Cationic effect study in acetate-based ionic liquids/ZIF-8 composites for CO2 sorption","authors":"Tiago J. Ferreira , Catarina Cabral , Thiago O. Carvalho , Joana Pais , Laura M. Esteves , Ludmila P.C. Silva , Patrícia M. Reis , José M.S.S. Esperança , Isabel A.A.C. Esteves","doi":"10.1016/j.susmat.2024.e01122","DOIUrl":"10.1016/j.susmat.2024.e01122","url":null,"abstract":"<div><div>Several strategies can be considered for the mitigation of carbon dioxide (CO<sub>2</sub>) emissions to the atmosphere, and among them is its post-combustion capture/separation from flue gas emitted from coal-fired power plants. In this work, six imidazolium, ammonium- and DABCO-based ionic liquids (ILs) containing the acetate anion were used to impregnate the metal-organic framework (MOF) ZIF-8. The cationic effect was studied to determine how the different cationic families and side alkyl chain size influence the gas sorption performance of the produced IL@MOF composites. The combination of different characterization techniques confirmed IL impregnation, and that the composite materials were microporous and crystalline. Single-component CO<sub>2</sub> and nitrogen (N<sub>2</sub>) sorption-desorption equilibrium measurements were performed at 303 K for ZIF-8 and the IL@ZIF-8 materials. At the low-pressure regime (0–1 bar), synergy was observed for the imidazolium-based composites, especially for the one with the long-side alkyl chain. The ideal CO<sub>2</sub>/N<sub>2</sub> selectivity was calculated for post-combustion composition, and, at 1 bar, [C<sub>10</sub>MIM][Ac]@ZIF-8 was over four times more selective than ZIF-8, while the selectivity of [C<sub>2</sub>MIM][Ac]@ZIF-8 at this pressure almost tripled when compared to the MOF. A chemical reaction between CO<sub>2</sub> and the imidazolium ILs explained the results.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01122"},"PeriodicalIF":8.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-19DOI: 10.1016/j.susmat.2024.e01123
M. Alejandra Quintana, Julia Aguirre, M. Ángeles Martín-Lara, Mónica Calero, Mario J. Muñoz-Batista, Rafael R. Solís
The oxidation of alcohols to aldehydes is one of the most relevant reactions in organic chemistry. The currently implemented methods based on expensive noble metallic catalysts, toxic solvents, and high temperature and pressure conditions have released the seek for softer and cheaper alternatives such as photocatalysis. In this sense, graphitic carbon nitride has been modified with sodium thiosulfate as a source of S and Na+ incorporation in the structure, aimed at enhancing the photocatalytic performance on the oxidation of alcohols to aldehydes, i.e. cinnamaldehyde, benzaldehyde, and vanillin in aqueous solution. Three g-C3N4 samples synthesized from different precursors, i.e. melamine, thiourea, and urea, were treated with sodium thiosulfate. Urea led to the g-C3N4 with the highest mesoporosity (surface area, 69 m2 g−1) and photocatalytic activity. The modification with 5 % (wt.) of Na2S2O3 enhanced the pseudo-first order rate constant of cinnamyl alcohol oxidation from 0.265 h−1 (bare sample) to 0.792 h−1 (Na2S2O3-modified). The characterization of the material suggests a better charge separation of the photogenerated charges after S and Na+ incorporation in the structure, minimizing the recombination rate of photogenerated charges. The optimum photocatalyst, tested in aqueous solution, was most selective in the production of benzaldehyde (selectivity, >100 %) > cinnamaldehyde (>23 %) > vanillin (∼5 %). The selectivity was considerably boosted under acetonitrile as the solvent medium, raising in the case of cinnamaldehyde the 23 % recorded in water to 51 % in pure acetonitrile. The degradation mechanism suggests a strong influence of the photogenerated holes and the superoxide radical, the latter being more selective in the oxidation of the alcohol.
{"title":"Sodium thiosulfate modified graphitic carbon nitride for enhancing the photocatalytic production of aldehydes","authors":"M. Alejandra Quintana, Julia Aguirre, M. Ángeles Martín-Lara, Mónica Calero, Mario J. Muñoz-Batista, Rafael R. Solís","doi":"10.1016/j.susmat.2024.e01123","DOIUrl":"10.1016/j.susmat.2024.e01123","url":null,"abstract":"<div><div>The oxidation of alcohols to aldehydes is one of the most relevant reactions in organic chemistry. The currently implemented methods based on expensive noble metallic catalysts, toxic solvents, and high temperature and pressure conditions have released the seek for softer and cheaper alternatives such as photocatalysis. In this sense, graphitic carbon nitride has been modified with sodium thiosulfate as a source of S and Na<sup>+</sup> incorporation in the structure, aimed at enhancing the photocatalytic performance on the oxidation of alcohols to aldehydes, i.e. cinnamaldehyde, benzaldehyde, and vanillin in aqueous solution. Three g-C<sub>3</sub>N<sub>4</sub> samples synthesized from different precursors, i.e. melamine, thiourea, and urea, were treated with sodium thiosulfate. Urea led to the g-C<sub>3</sub>N<sub>4</sub> with the highest mesoporosity (surface area, 69 m<sup>2</sup> g<sup>−1</sup>) and photocatalytic activity. The modification with 5 % (wt.) of Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub> enhanced the pseudo-first order rate constant of cinnamyl alcohol oxidation from 0.265 h<sup>−1</sup> (bare sample) to 0.792 h<sup>−1</sup> (Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>-modified). The characterization of the material suggests a better charge separation of the photogenerated charges after S and Na<sup>+</sup> incorporation in the structure, minimizing the recombination rate of photogenerated charges. The optimum photocatalyst, tested in aqueous solution, was most selective in the production of benzaldehyde (selectivity, >100 %) > cinnamaldehyde (>23 %) > vanillin (∼5 %). The selectivity was considerably boosted under acetonitrile as the solvent medium, raising in the case of cinnamaldehyde the 23 % recorded in water to 51 % in pure acetonitrile. The degradation mechanism suggests a strong influence of the photogenerated holes and the superoxide radical, the latter being more selective in the oxidation of the alcohol.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01123"},"PeriodicalIF":8.6,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214993724003038/pdfft?md5=3edc3fc330f51d90dfd069a9dae67fbf&pid=1-s2.0-S2214993724003038-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-16DOI: 10.1016/j.susmat.2024.e01120
Sushant Wakekar, Chinmoy Das
To address water scarcity globally, recently atmospheric water harvesting (AWH) has emerged as an intriguing and sustainable solution. This comprehensive review critically investigates how diversity in MOFs and their composite materials shapes the effectiveness and practicality of AWH technologies. These materials range from pristine MOFs to functionalized MOFs-based composites to attain the sophisticated hydrophilic behavior to perform as water harvesters. The multifaceted effects of MOFs and their composite materials on the kinetics of sorption and condensation, the feasibility of water uptake and release, the overall performance of the materials, the theoretical understanding of water uptake, and various instrumentation techniques have been demonstrated in this comprehensive review. It contributes to the ongoing discourse on sustainable water sourcing by emphasizing the pivotal role of materials diversity in shaping the future of AWH technologies.
{"title":"Deciphering the functions of metal-organic frameworks and their derived composites towards atmospheric water harvesting: A comprehensive review","authors":"Sushant Wakekar, Chinmoy Das","doi":"10.1016/j.susmat.2024.e01120","DOIUrl":"10.1016/j.susmat.2024.e01120","url":null,"abstract":"<div><div>To address water scarcity globally, recently atmospheric water harvesting (AWH) has emerged as an intriguing and sustainable solution. This comprehensive review critically investigates how diversity in MOFs and their composite materials shapes the effectiveness and practicality of AWH technologies. These materials range from pristine MOFs to functionalized MOFs-based composites to attain the sophisticated hydrophilic behavior to perform as water harvesters. The multifaceted effects of MOFs and their composite materials on the kinetics of sorption and condensation, the feasibility of water uptake and release, the overall performance of the materials, the theoretical understanding of water uptake, and various instrumentation techniques have been demonstrated in this comprehensive review. It contributes to the ongoing discourse on sustainable water sourcing by emphasizing the pivotal role of materials diversity in shaping the future of AWH technologies.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"42 ","pages":"Article e01120"},"PeriodicalIF":8.6,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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