Pub Date : 2024-09-26DOI: 10.1016/j.mtsust.2024.101000
Xiaoling Zou , Mang Lu , Huanggen Yang , Xuejiao Wu
It is a challenging and meaningful task to design a piezo-photocatalyst with excellent performance under mild mechanical stirring conditions rather than ultrasonic irradiation. Herein, a hydraulic-driven piezo-photocatalytic process was proposed, using MoS2-based heterojunction as catalysts for diclofenac sodium (DCF) degradation. A magnetically retrievable MoS2/TiO2/Fe3O4 composite was designed and successfully prepared by a facile one-step solvothermal process. Among various heterojunction composites and pure MoS2, the ternary composite MoS2/TiO2/Fe3O4 exhibited the strongest piezo-photocatalysis capability, with a DCF degradation efficiency of 99.6% and a pseudo-first-order rate constant of 0.733 min−1. Additionally, the degradation efficiency of DCF was still up to 85.2% in 6 min after 5 cycles by MoS2/TiO2/Fe3O4. The ternary composite can be easily collected and separated using a magnet. There was an optimum hydraulic gradient value (0.45 s−1) for DCF degradation. •OH played a major role in DCF degradation during the hydraulic-driven piezo-photocatalytic process. A satisfactory DCF degradation was found in the actual water media. The results verify the existence of a synergetic effect between piezo and photocatalytic processes. Thereupon, the hydraulic-driven piezo-photocatalysis can be an efficient, sustainable, and energy-saving process for water treatment.
{"title":"Novel MoS2-based heterojunction as an efficient and magnetically retrievable piezo-photocatalyst for diclofenac sodium degradation","authors":"Xiaoling Zou , Mang Lu , Huanggen Yang , Xuejiao Wu","doi":"10.1016/j.mtsust.2024.101000","DOIUrl":"10.1016/j.mtsust.2024.101000","url":null,"abstract":"<div><div>It is a challenging and meaningful task to design a piezo-photocatalyst with excellent performance under mild mechanical stirring conditions rather than ultrasonic irradiation. Herein, a hydraulic-driven piezo-photocatalytic process was proposed, using MoS<sub>2</sub>-based heterojunction as catalysts for diclofenac sodium (DCF) degradation. A magnetically retrievable MoS<sub>2</sub>/TiO<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub> composite was designed and successfully prepared by a facile one-step solvothermal process. Among various heterojunction composites and pure MoS<sub>2</sub>, the ternary composite MoS<sub>2</sub>/TiO<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub> exhibited the strongest piezo-photocatalysis capability, with a DCF degradation efficiency of 99.6% and a pseudo-first-order rate constant of 0.733 min<sup>−1</sup>. Additionally, the degradation efficiency of DCF was still up to 85.2% in 6 min after 5 cycles by MoS<sub>2</sub>/TiO<sub>2</sub>/Fe<sub>3</sub>O<sub>4</sub>. The ternary composite can be easily collected and separated using a magnet. There was an optimum hydraulic gradient value (0.45 s<sup>−1</sup>) for DCF degradation. <sup>•</sup>OH played a major role in DCF degradation during the hydraulic-driven piezo-photocatalytic process. A satisfactory DCF degradation was found in the actual water media. The results verify the existence of a synergetic effect between piezo and photocatalytic processes. Thereupon, the hydraulic-driven piezo-photocatalysis can be an efficient, sustainable, and energy-saving process for water treatment.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 101000"},"PeriodicalIF":7.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327487","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 : 2024-09-25DOI: 10.1016/j.mtsust.2024.100995
Xu Qi , Beikai Zhao , Jiawei Zou , Yuping Zhao , Jing Gao , Lin Gu , Yiping Lu , Ze Zhang , Qian Yu
Intermetallic compounds typically exhibit limited plastic deformation capacity due to challenges in activating dislocation slip and deformation twinning, coupled with a lack of alternative deformation mechanisms. Ti–Pt alloys are a prevalent type of intermetallic compound utilized in high-temperature shape memory alloys and as materials for energy applications in electric fields. However, they often exhibit poor deformation capability. Here, we prepared a low-symmetry intermetallic phase, Ti4Pt3, which demonstrates significant plastic deformation capability. This phase features a high density of parallel planar defects, resulting in an exceptionally large lattice periodicity perpendicular to these defects. Through in-situ scanning electron microscope compression tests, we observed substantial plastic deformation in this new phase. Analysis of the deformed Ti4Pt3 phase revealed that the dense planar defects create uniformly distributed sites of internal stress concentration, enabling a rapid increase in back stress within crystals. This phenomenon leads to notable lattice rotation and localized order-disorder transitions, both crucial mechanisms facilitating plastic deformation and enhancing deformation capacity. Our research underscores the potential of leveraging structural asymmetry to enable unconventional deformation mechanisms, thereby enhancing the plasticity of intermetallic materials.
{"title":"The deformation mechanism of low symmetric Ti–Pt intermetallic compounds containing high density of planar defects","authors":"Xu Qi , Beikai Zhao , Jiawei Zou , Yuping Zhao , Jing Gao , Lin Gu , Yiping Lu , Ze Zhang , Qian Yu","doi":"10.1016/j.mtsust.2024.100995","DOIUrl":"10.1016/j.mtsust.2024.100995","url":null,"abstract":"<div><div>Intermetallic compounds typically exhibit limited plastic deformation capacity due to challenges in activating dislocation slip and deformation twinning, coupled with a lack of alternative deformation mechanisms. Ti–Pt alloys are a prevalent type of intermetallic compound utilized in high-temperature shape memory alloys and as materials for energy applications in electric fields. However, they often exhibit poor deformation capability. Here, we prepared a low-symmetry intermetallic phase, Ti<sub>4</sub>Pt<sub>3</sub>, which demonstrates significant plastic deformation capability. This phase features a high density of parallel planar defects, resulting in an exceptionally large lattice periodicity perpendicular to these defects. Through in-situ scanning electron microscope compression tests, we observed substantial plastic deformation in this new phase. Analysis of the deformed Ti<sub>4</sub>Pt<sub>3</sub> phase revealed that the dense planar defects create uniformly distributed sites of internal stress concentration, enabling a rapid increase in back stress within crystals. This phenomenon leads to notable lattice rotation and localized order-disorder transitions, both crucial mechanisms facilitating plastic deformation and enhancing deformation capacity. Our research underscores the potential of leveraging structural asymmetry to enable unconventional deformation mechanisms, thereby enhancing the plasticity of intermetallic materials.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100995"},"PeriodicalIF":7.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359018","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 : 2024-09-25DOI: 10.1016/j.mtsust.2024.100994
Yuhe He , Jilong Wang , Qingqing Yuan , Hao Xu , Yejun Guan , Peng Wu
Supported Pd catalysts has found wide applications in reductive etherification of aldehydes. However, the synthesis of furfural-derived ethers on Pd catalysts has encountered great challenges because several side reactions such as over-hydrogenation of furan ring and decarbonylation always occur simultaneously under the reaction conditions. We herein reported the catalytic performance of Pd nanoparticles (∼4 nm) supported on the external surface of layered structured PLS-3 zeolite with narrow pore size (<0.4 nm) and large external surface area (80–100 m2/g). The PLS-3 with Si/Al of 92 having total acid sites of 93 μmol/g showed satisfied ether selectivity. Pd nanoparticles located on the external surface showed better etherification selectivity than those confined in the framework, due to the less diffusion limitation of furfural acetal as an intermediate.
{"title":"Layered silicate PLS-3 with PREFER structure supported Pd nanoparticles: A recyclable catalyst for the synthesis of furfuryl ethyl ether","authors":"Yuhe He , Jilong Wang , Qingqing Yuan , Hao Xu , Yejun Guan , Peng Wu","doi":"10.1016/j.mtsust.2024.100994","DOIUrl":"10.1016/j.mtsust.2024.100994","url":null,"abstract":"<div><div>Supported Pd catalysts has found wide applications in reductive etherification of aldehydes. However, the synthesis of furfural-derived ethers on Pd catalysts has encountered great challenges because several side reactions such as over-hydrogenation of furan ring and decarbonylation always occur simultaneously under the reaction conditions. We herein reported the catalytic performance of Pd nanoparticles (∼4 nm) supported on the external surface of layered structured PLS-3 zeolite with narrow pore size (<0.4 nm) and large external surface area (80–100 m<sup>2</sup>/g). The PLS-3 with Si/Al of 92 having total acid sites of 93 μmol/g showed satisfied ether selectivity. Pd nanoparticles located on the external surface showed better etherification selectivity than those confined in the framework, due to the less diffusion limitation of furfural acetal as an intermediate.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100994"},"PeriodicalIF":7.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323975","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 : 2024-09-24DOI: 10.1016/j.mtsust.2024.100991
Yuyan Guo , Zhiguang Guo , Weimin Liu
Inspired by the capillary effect in nature (such as water transport in soils) and droplet-drive performance of Nepenthes, a new driving strategy for emulsion separation membrane based on the synergistic effect of capillary force and progressive wettability-induction force was proposed. It is prepared by a one-step, simple continuous, electrospinning process. By adjusting solutions and spinning parameters, the membrane obtains its capillary structure and progressive oleophilicity in one-step preparation. Attractively, the membrane shows separation efficiency and excellent permeability, with a flux of 384801 L m−2 h−1 bar−1 for the oil-water mixture, and the little water content of less than 18 ppm. And for emulsions, the flux even reaches 50000 L m−2 h−1 bar−1 and the separation efficiency reaches 99.95%. Furthermore, the membrane has excellent mechanical-stability: at 80 kPa transmembrane pressure, it can still effectively prevent water's penetration. Drawing inspiration from nature, the incorporation of capillary force and progressive wettability-induction force into the separation membrane as an additional dual emulsion separation driving force proves to be a highly effective and versatile approach. This method provides a way to solve the general flux-efficiency balance problem of oil-water separation and also provides a new strategy for the preparation of separation membranes for various purposes.
受自然界中的毛细管效应（如土壤中的水输送）和尼泊金的液滴驱动性能的启发，提出了一种基于毛细管力和渐进润湿诱导力协同效应的乳液分离膜的新驱动策略。它是通过一步式、简单连续的电纺丝工艺制备的。通过调整溶液和纺丝参数，该膜在一步制备过程中获得了毛细管结构和渐进亲油性。该膜具有极高的分离效率和极佳的渗透性，对油水混合物的通量可达 384801 L m-2 h-1 bar-1，且含水量小于 18 ppm。对于乳状液，通量甚至达到 50000 L m-2 h-1 bar-1，分离效率达到 99.95%。此外，该膜还具有出色的机械稳定性：在 80 kPa 的跨膜压力下，它仍能有效阻止水的渗透。从大自然中汲取灵感，在分离膜中加入毛细管力和渐进润湿诱导力作为额外的双重乳液分离驱动力，被证明是一种高效且多用途的方法。这种方法为解决油水分离的一般通量-效率平衡问题提供了一种途径，也为制备各种用途的分离膜提供了一种新策略。
{"title":"An adaptive and fast emulsion separation Janus membrane","authors":"Yuyan Guo , Zhiguang Guo , Weimin Liu","doi":"10.1016/j.mtsust.2024.100991","DOIUrl":"10.1016/j.mtsust.2024.100991","url":null,"abstract":"<div><div>Inspired by the capillary effect in nature (such as water transport in soils) and droplet-drive performance of Nepenthes, a new driving strategy for emulsion separation membrane based on the synergistic effect of capillary force and progressive wettability-induction force was proposed. It is prepared by a one-step, simple continuous, electrospinning process. By adjusting solutions and spinning parameters, the membrane obtains its capillary structure and progressive oleophilicity in one-step preparation. Attractively, the membrane shows separation efficiency and excellent permeability, with a flux of 384801 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup> for the oil-water mixture, and the little water content of less than 18 ppm. And for emulsions, the flux even reaches 50000 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup> and the separation efficiency reaches 99.95%. Furthermore, the membrane has excellent mechanical-stability: at 80 kPa transmembrane pressure, it can still effectively prevent water's penetration. Drawing inspiration from nature, the incorporation of capillary force and progressive wettability-induction force into the separation membrane as an additional dual emulsion separation driving force proves to be a highly effective and versatile approach. This method provides a way to solve the general flux-efficiency balance problem of oil-water separation and also provides a new strategy for the preparation of separation membranes for various purposes.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100991"},"PeriodicalIF":7.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359016","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 : 2024-09-24DOI: 10.1016/j.mtsust.2024.100990
Muhammad Muddasar , Mario Culebras , Maurice N. Collins
Lignin, a complex phenolic polymer abundantly present in the papermaking and biofuel industries, stands out as a cost-effective, plentiful, and non-toxic material. In recent years, there has been significant interest in utilizing this green biopolymer for energy storage devices. This review thoroughly examines lignin structure, chemistry, and classification based on separation techniques. It then explores the most recent breakthroughs in creating carbon materials (nanosheets, nanofibers, spheres, composites, and 3D hierarchical porous carbon) from lignin, discussing its versatility in supercapacitors and batteries. Finally, this study highlights future materials and their prospects, the critical challenges which must be addressed while suggesting future research avenues for lignin-derived carbon materials in energy storage. By combining insights from different studies, this review aims to offer readers a thorough understanding of how lignin-derived carbon materials could play a crucial role in promoting sustainable energy solutions.
{"title":"Lignin and its carbon derivatives: Synthesis techniques and their energy storage applications","authors":"Muhammad Muddasar , Mario Culebras , Maurice N. Collins","doi":"10.1016/j.mtsust.2024.100990","DOIUrl":"10.1016/j.mtsust.2024.100990","url":null,"abstract":"<div><div>Lignin, a complex phenolic polymer abundantly present in the papermaking and biofuel industries, stands out as a cost-effective, plentiful, and non-toxic material. In recent years, there has been significant interest in utilizing this green biopolymer for energy storage devices. This review thoroughly examines lignin structure, chemistry, and classification based on separation techniques. It then explores the most recent breakthroughs in creating carbon materials (nanosheets, nanofibers, spheres, composites, and 3D hierarchical porous carbon) from lignin, discussing its versatility in supercapacitors and batteries. Finally, this study highlights future materials and their prospects, the critical challenges which must be addressed while suggesting future research avenues for lignin-derived carbon materials in energy storage. By combining insights from different studies, this review aims to offer readers a thorough understanding of how lignin-derived carbon materials could play a crucial role in promoting sustainable energy solutions.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100990"},"PeriodicalIF":7.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-24DOI: 10.1016/j.mtsust.2024.100989
Xin Huang , Kang Xu , Jiahao Li , Wei Chen , Zhenxing Yang , Kebin Ding , Yujie Leng , Yakui Weng , Shuai Dong , Yunhui Wang , Zhihong Yang
The rational design of van der Waals heterostructure offers an effective avenue for improving the photocatalytic efficiency of individual two-dimensional materials, garnering extensive interest in recent years. Herein, the feasibility of GeC/Ga2SO heterostructure as a photocatalyst for overall water splitting has been explored based on the first-principles calculations. Our findings reveal that the electronic bandstructure of GeC/Ga2SO heterostructure can be engineered in staggered or straddling band alignment depending on stacking patterns. Particularly, in the GeC/Ga2SO heterostructure with staggered band alignment, an intrinsic built-in electric field is established at the interface with the direction from GeC to Ga2SO, facilitating the formation of a direct Z-scheme heterostructure. Also importantly, the band-edge positions of Z-scheme GeC/Ga2SO heterostructure cross the water redox potentials, providing adequate driving force for both the reduction and oxidation reactions of water. Gibbs free energy calculations demonstrated that the photocatalytic overall water splitting can proceed spontaneously in the neutral environment (pH = 7) under light irradiation. Moreover, GeC/Ga2SO heterostructure exhibits good thermal stability and a strong (magnitude in 105 cm−1) and broad (from visible to ultraviolet light) optical absorption. Finally, through applying the tensile strain, further enhancements in the optical absorption and carrier redox ability are achieved due to the favorable modulation in the bandgap. Therefore, all these features make GeC/Ga2SO heterostructure show great potential in the application of photocatalytic water splitting.
{"title":"First-principles study of GeC/Ga2SO heterostructure as a potential direct Z-scheme photocatalyst for water splitting","authors":"Xin Huang , Kang Xu , Jiahao Li , Wei Chen , Zhenxing Yang , Kebin Ding , Yujie Leng , Yakui Weng , Shuai Dong , Yunhui Wang , Zhihong Yang","doi":"10.1016/j.mtsust.2024.100989","DOIUrl":"10.1016/j.mtsust.2024.100989","url":null,"abstract":"<div><div>The rational design of van der Waals heterostructure offers an effective avenue for improving the photocatalytic efficiency of individual two-dimensional materials, garnering extensive interest in recent years. Herein, the feasibility of GeC/Ga<sub>2</sub>SO heterostructure as a photocatalyst for overall water splitting has been explored based on the first-principles calculations. Our findings reveal that the electronic bandstructure of GeC/Ga<sub>2</sub>SO heterostructure can be engineered in staggered or straddling band alignment depending on stacking patterns. Particularly, in the GeC/Ga<sub>2</sub>SO heterostructure with staggered band alignment, an intrinsic built-in electric field is established at the interface with the direction from GeC to Ga<sub>2</sub>SO, facilitating the formation of a direct Z-scheme heterostructure. Also importantly, the band-edge positions of Z-scheme GeC/Ga<sub>2</sub>SO heterostructure cross the water redox potentials, providing adequate driving force for both the reduction and oxidation reactions of water. Gibbs free energy calculations demonstrated that the photocatalytic overall water splitting can proceed spontaneously in the neutral environment (pH = 7) under light irradiation. Moreover, GeC/Ga<sub>2</sub>SO heterostructure exhibits good thermal stability and a strong (magnitude in 10<sup>5</sup> cm<sup>−1</sup>) and broad (from visible to ultraviolet light) optical absorption. Finally, through applying the tensile strain, further enhancements in the optical absorption and carrier redox ability are achieved due to the favorable modulation in the bandgap. Therefore, all these features make GeC/Ga<sub>2</sub>SO heterostructure show great potential in the application of photocatalytic water splitting.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100989"},"PeriodicalIF":7.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359015","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 : 2024-09-24DOI: 10.1016/j.mtsust.2024.100992
Minh-Trang Huynh Pham , Art Wei Yao Ang , Truong-Giang Vo , Tomohiro Hayashi , Chia-Ying Chiang
The burgeoning interest in the electrocatalytic conversion of biomass-derived compounds, exemplified by 5-hydroxymethylfurfural (HMF), into economically valuable products underscores the significance of such studies. Within this context, the electrocatalytic oxidation of HMF into 2,5-diformylfuran (DFF) using the mixed-valence silver (I, III) oxide (AgO) as the catalyst is presented for the first time. A thorough investigation has been carried out to explore the complex factors influencing the electrochemical transformation of the HMF to DFF, involving applied potentials, reactant concentrations, and the significant implications of mass transfer phenomena. Under optimized conditions, DFF, one of the highest value-added intermediates, can be produced with selectivity as high as 54%. Additionally, a yield of 10.8 μmol cm−2 h−1 was obtained under mild basic condition. Another pivotal aspect of this work involves meticulously examining the reaction process, bolstered by a comprehensive analytical approach that integrates high-performance liquid chromatography (HPLC), and operando Raman spectroscopy. The amalgamation of operando Raman spectroscopy with advanced simulation techniques represents a novel endeavor, offering a groundbreaking pathway to unravel the complexities inherent in these compounds and contribute substantially to the understanding of HMF oxidation and its intermediates. By looking closely at the catalyst surface during the reaction, a valuable insight into the steps involved was developed, helping in proposing an in-depth reaction pathway.
{"title":"Unlocking the potential of mixed-valence silver oxide for electrochemical valorization of 5-hydroxymethylfurfural into valuable products","authors":"Minh-Trang Huynh Pham , Art Wei Yao Ang , Truong-Giang Vo , Tomohiro Hayashi , Chia-Ying Chiang","doi":"10.1016/j.mtsust.2024.100992","DOIUrl":"10.1016/j.mtsust.2024.100992","url":null,"abstract":"<div><div>The burgeoning interest in the electrocatalytic conversion of biomass-derived compounds, exemplified by 5-hydroxymethylfurfural (HMF), into economically valuable products underscores the significance of such studies. Within this context, the electrocatalytic oxidation of HMF into 2,5-diformylfuran (DFF) using the mixed-valence silver (I, III) oxide (AgO) as the catalyst is presented for the first time. A thorough investigation has been carried out to explore the complex factors influencing the electrochemical transformation of the HMF to DFF, involving applied potentials, reactant concentrations, and the significant implications of mass transfer phenomena. Under optimized conditions, DFF, one of the highest value-added intermediates, can be produced with selectivity as high as 54%. Additionally, a yield of 10.8 μmol cm<sup>−2</sup> h<sup>−1</sup> was obtained under mild basic condition. Another pivotal aspect of this work involves meticulously examining the reaction process, bolstered by a comprehensive analytical approach that integrates high-performance liquid chromatography (HPLC), and <em>operando</em> Raman spectroscopy. The amalgamation of <em>operando</em> Raman spectroscopy with advanced simulation techniques represents a novel endeavor, offering a groundbreaking pathway to unravel the complexities inherent in these compounds and contribute substantially to the understanding of HMF oxidation and its intermediates. By looking closely at the catalyst surface during the reaction, a valuable insight into the steps involved was developed, helping in proposing an in-depth reaction pathway.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100992"},"PeriodicalIF":7.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327485","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 : 2024-09-24DOI: 10.1016/j.mtsust.2024.100993
Deepu Murukadas , Woongki Lee , Chanbin Park , Hwajeong Kim , Youngkyoo Kim
Here we report that organic/inorganic hybrid composite films, consisting of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and zeolite Y (Zy), can efficiently convert heat to electricity in the horizontal device geometry. The PEDOT:PSS/Zy (PPZy) hybrid composite films were prepared from corresponding aqueous solutions at various Zy contents (up to 50 wt%). The PPZy solutions exhibited an increased viscous state with a maximum at Zy = 30 wt%, indicating strong interactions between PEDOT:PSS and Zy components. All devices with the PPZy composite films could convert heat to electricity and showed higher thermoelectric (TE) performances than those with the pristine PEDOT:PSS films. The TE devices with the PPZy films (Zy = 30 wt%) delivered an output power of 8.8 pW with a power factor of 0.76 μW/mK2, which is ca. 20 times higher than those with the pristine PEDOT:PSS films. The flexible TE devices, which were fabricated on poly(ethylene naphthalate) (PEN) film substrates, exhibited robust TE performances even after 5000 bending cycles. The present approach of hybrid composite films based on zeolite particles may contribute to further TE performance improvement for flexible and wearable TE devices.
在此，我们报告了由聚（3,4-亚乙二氧基噻吩）:聚（苯乙烯磺酸）（PEDOT:PSS）和沸石 Y（Zy）组成的有机/无机混合复合薄膜可以在水平器件几何形状中有效地将热能转化为电能。PEDOT:PSS/Zy (PPZy) 混合复合薄膜是用不同 Zy 含量（最高达 50 wt%）的相应水溶液制备的。PPZy 溶液的粘度在 Zy = 30 wt% 时达到最大值，表明 PEDOT:PSS 和 Zy 成分之间存在很强的相互作用。与使用原始 PEDOT:PSS 薄膜的器件相比，使用 PPZy 复合薄膜的所有器件都能将热量转化为电能，并显示出更高的热电（TE）性能。使用 PPZy 薄膜（Zy = 30 wt%）的 TE 器件输出功率为 8.8 pW，功率因数为 0.76 μW/mK2，比使用原始 PEDOT:PSS 薄膜的器件高出约 20 倍。在聚（萘乙酸乙二醇酯）（PEN）薄膜基底上制作的柔性 TE 器件即使在经过 5000 次弯曲循环后仍能表现出稳定的 TE 性能。目前基于沸石颗粒的混合复合薄膜方法可能有助于进一步提高柔性和可穿戴 TE 器件的 TE 性能。
{"title":"Thermoelectric devices with polymer/zeolite hybrid composite films for conversion of heat to electricity","authors":"Deepu Murukadas , Woongki Lee , Chanbin Park , Hwajeong Kim , Youngkyoo Kim","doi":"10.1016/j.mtsust.2024.100993","DOIUrl":"10.1016/j.mtsust.2024.100993","url":null,"abstract":"<div><div>Here we report that organic/inorganic hybrid composite films, consisting of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and zeolite Y (Zy), can efficiently convert heat to electricity in the horizontal device geometry. The PEDOT:PSS/Zy (PPZy) hybrid composite films were prepared from corresponding aqueous solutions at various Zy contents (up to 50 wt%). The PPZy solutions exhibited an increased viscous state with a maximum at Zy = 30 wt%, indicating strong interactions between PEDOT:PSS and Zy components. All devices with the PPZy composite films could convert heat to electricity and showed higher thermoelectric (TE) performances than those with the pristine PEDOT:PSS films. The TE devices with the PPZy films (Zy = 30 wt%) delivered an output power of 8.8 pW with a power factor of 0.76 μW/mK<sup>2</sup>, which is ca. 20 times higher than those with the pristine PEDOT:PSS films. The flexible TE devices, which were fabricated on poly(ethylene naphthalate) (PEN) film substrates, exhibited robust TE performances even after 5000 bending cycles. The present approach of hybrid composite films based on zeolite particles may contribute to further TE performance improvement for flexible and wearable TE devices.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100993"},"PeriodicalIF":7.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359017","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 : 2024-09-23DOI: 10.1016/j.mtsust.2024.100987
Wei Dong , Zhiqiang Ren , Xin Liu
As an efficient method for utilizing coal gangue (CG), concrete incorporating coal gangue as coarse aggregate has significantly reduced the reliance on natural aggregates, offering substantial environmental and economic benefits. In this study, coal gangue concrete was prepared with coal gangue replacement rates of 0, 20, 40, 60, 80, and 100%, and mechanical tests under unconfined compression were conducted to evaluate the stress-strain behavior and failure mechanism of coal gangue coarse aggregate concrete (CGC). Utilizing scanning electron microscope (SEM) microscopic characterization, the microscopic failure mechanism of CGC was further elucidated. With increased coal gangue replacement, the CGC's uniaxial compression failure mode shifts from shear to longitudinal splitting failure. The slope, peak stress and elastic modulus of the stress–strain curve's rising section are negatively correlated with the coal gangue content, while the falling section's slope, peak strain and ultimate strain are positively correlated. Next, building upon the classical constitutive model, we adjust the constitutive parameters utilizing the uniaxial compressive strength and coal gangue content. Finally, we introduce a predictive model for the CGC's constitutive compressive behavior across various content levels. There is a notably high agreement between the model and experimental data.
{"title":"Experimental study on constitutive relation of coal gangue coarse aggregate concrete under uniaxial compression","authors":"Wei Dong , Zhiqiang Ren , Xin Liu","doi":"10.1016/j.mtsust.2024.100987","DOIUrl":"10.1016/j.mtsust.2024.100987","url":null,"abstract":"<div><div>As an efficient method for utilizing coal gangue (CG), concrete incorporating coal gangue as coarse aggregate has significantly reduced the reliance on natural aggregates, offering substantial environmental and economic benefits. In this study, coal gangue concrete was prepared with coal gangue replacement rates of 0, 20, 40, 60, 80, and 100%, and mechanical tests under unconfined compression were conducted to evaluate the stress-strain behavior and failure mechanism of coal gangue coarse aggregate concrete (CGC). Utilizing scanning electron microscope (SEM) microscopic characterization, the microscopic failure mechanism of CGC was further elucidated. With increased coal gangue replacement, the CGC's uniaxial compression failure mode shifts from shear to longitudinal splitting failure. The slope, peak stress and elastic modulus of the stress–strain curve's rising section are negatively correlated with the coal gangue content, while the falling section's slope, peak strain and ultimate strain are positively correlated. Next, building upon the classical constitutive model, we adjust the constitutive parameters utilizing the uniaxial compressive strength and coal gangue content. Finally, we introduce a predictive model for the CGC's constitutive compressive behavior across various content levels. There is a notably high agreement between the model and experimental data.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100987"},"PeriodicalIF":7.1,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315570","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 : 2024-09-23DOI: 10.1016/j.mtsust.2024.100986
Shu-Yao Li , Ting Yan , Ying-Jie Huo , Wei-Guo Pan
Combining solar energy conversion with latent heat storage based on phase change materials (PCMs) has offered a promising way for expanding solar energy utilization. However, the application of PCMs for solar heat utilization is greatly limited by low thermal conductivity and poor sunlight absorption capacity. Carbon foam (CF) has excellent sunlight absorption properties, and carbon nanotube (CNT) have good thermal conductivity. In this study, CF/CNT porous material was prepared by self-assembly thermal-bridge between CF and CNT. CF/CNT was employed to a porous matrix for the encapsulation of octadecanol (OC), and then a composite photothermal PCM (CF/CNT/OC) was successfully fabricated. Compared with pure OC, the CF/CNT/OC has superior thermal conductivity capacity and excellent photothermal conversion performance. The thermal conductivity of CF/CNT/OC89 reached 1.31 W m−1 K−1, and the photothermal conversion efficiency was 82.6 %. Meanwhile, the melting enthalpy of CF/CNT/OC98 reached up to 275.8 kJ∙kg−1, exhibiting the excellent thermal storage properties. This functional composite PCM has broad application prospects in solar energy capture and storage, building energy saving and so on.
{"title":"Carbon nanotube/carbon foam thermal-bridge enhancing solar energy conversion and storage of phase change materials","authors":"Shu-Yao Li , Ting Yan , Ying-Jie Huo , Wei-Guo Pan","doi":"10.1016/j.mtsust.2024.100986","DOIUrl":"10.1016/j.mtsust.2024.100986","url":null,"abstract":"<div><div>Combining solar energy conversion with latent heat storage based on phase change materials (PCMs) has offered a promising way for expanding solar energy utilization. However, the application of PCMs for solar heat utilization is greatly limited by low thermal conductivity and poor sunlight absorption capacity. Carbon foam (CF) has excellent sunlight absorption properties, and carbon nanotube (CNT) have good thermal conductivity. In this study, CF/CNT porous material was prepared by self-assembly thermal-bridge between CF and CNT. CF/CNT was employed to a porous matrix for the encapsulation of octadecanol (OC), and then a composite photothermal PCM (CF/CNT/OC) was successfully fabricated. Compared with pure OC, the CF/CNT/OC has superior thermal conductivity capacity and excellent photothermal conversion performance. The thermal conductivity of CF/CNT/OC89 reached 1.31 W m<sup>−1</sup> K<sup>−1</sup>, and the photothermal conversion efficiency was 82.6 %. Meanwhile, the melting enthalpy of CF/CNT/OC98 reached up to 275.8 kJ∙kg<sup>−1</sup>, exhibiting the excellent thermal storage properties. This functional composite PCM has broad application prospects in solar energy capture and storage, building energy saving and so on.</div></div>","PeriodicalId":18322,"journal":{"name":"Materials Today Sustainability","volume":"28 ","pages":"Article 100986"},"PeriodicalIF":7.1,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359011","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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