Progress in Natural Science: Materials International最新文献

英文中文

Balancing charge carrier density and exciton recombination in defective g-C3N4 for efficient photocatalytic hydrogen evolution

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.015

Peng Wu , Tao Zhou , Zhongqiu Tong , Fengshuo Xi , Jijun Lu , Xiufeng Li , Wenhui Ma , Shaoyuan Li , Xingwei Yang

Graphitic carbon nitride (g-C₃N₄) is a promising material for photocatalytic hydrogen production owing to its tunable band structure and high charge carrier density, however, it displays a high carrier recombination rate. Defect engineering can solve this problem by providing active sites within g-C₃N₄ to accelerate the separation of photogenerated electrons and holes and enhance its solar light absorption. Previous studies have implied that there exists a defect concentration threshold for obtaining the maximum photocatalytic hydrogen production performance, but the underlying mechanism remains unclear. In this study, the relationship between charge carrier density and exciton recombination was investigated to address this issue. A series of g-C₃N₄ photocatalysts with different tri-coordinate nitrogen (N_3C) vacancy concentrations were synthesized using in-situ coprecipitation polymerization. The catalytic performance is related to the vacancy concentration, higher vacancy concentration will lead to higher carrier separation efficiency and carrier density of g-C₃N₄, as well as better photocatalytic hydrogen production performance. However, when excessive vacancies act as recombination centers, the charge carrier recombination rate is increased, which will also adversely affect the photocatalytic hydrogen production performance.

{"title":"Balancing charge carrier density and exciton recombination in defective g-C3N4 for efficient photocatalytic hydrogen evolution","authors":"Peng Wu , Tao Zhou , Zhongqiu Tong , Fengshuo Xi , Jijun Lu , Xiufeng Li , Wenhui Ma , Shaoyuan Li , Xingwei Yang","doi":"10.1016/j.pnsc.2024.12.015","DOIUrl":"10.1016/j.pnsc.2024.12.015","url":null,"abstract":"<div><div>Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) is a promising material for photocatalytic hydrogen production owing to its tunable band structure and high charge carrier density, however, it displays a high carrier recombination rate. Defect engineering can solve this problem by providing active sites within g-C<sub>3</sub>N<sub>4</sub> to accelerate the separation of photogenerated electrons and holes and enhance its solar light absorption. Previous studies have implied that there exists a defect concentration threshold for obtaining the maximum photocatalytic hydrogen production performance, but the underlying mechanism remains unclear. In this study, the relationship between charge carrier density and exciton recombination was investigated to address this issue. A series of g-C<sub>3</sub>N<sub>4</sub> photocatalysts with different tri-coordinate nitrogen (N<sub>3C</sub>) vacancy concentrations were synthesized using <em>in-situ</em> coprecipitation polymerization. The catalytic performance is related to the vacancy concentration, higher vacancy concentration will lead to higher carrier separation efficiency and carrier density of g-C<sub>3</sub>N<sub>4</sub>, as well as better photocatalytic hydrogen production performance. However, when excessive vacancies act as recombination centers, the charge carrier recombination rate is increased, which will also adversely affect the photocatalytic hydrogen production performance.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 238-244"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A machine learning method approach for designing novel high strength and plasticity metastable β titanium alloys

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.11.010

Zhiduo Liu , Haoyu Zhang , Shuai Zhang , Jun Cheng , Yixuan He , Ge Zhou , Jiawei Liu , Suping Song , Lijia Chen

In order to improve efficiency and reduce costs, four machine learning models were established for the design of metastable β titanium alloys, including the Adaboost model, the LightGBM model, the Voting model, and the Stacking model. The accuracy of these models was evaluated, and all models exhibited excellent accuracy for tensile strength, yield strength, and elongation. The values of R-squared coefficients(R²) all greater than 0.9. Among them, the LightGBM model showed the highest accuracy, with relatively smallest values of mean absolute error (MAE) and root mean square error (RMSE) and relatively largest value of R². To further verify the accuracy of the model, a metastable β titanium alloy Ti-5.5Cr-5Al-4Mo-3Nb-2Zr was designed by the LightGBM model. The predicted values of the alloy's tensile strength, yield strength, and elongation under three heat treatment processes were in high agreement with the experimental values. The alloy exhibited optimal strength-plasticity matching after undergoing a solution treatment at 850 °C for 0.5 h, followed by aging at 650 °C for 8 h, with a tensile strength of 1317 MPa, an elongation of 11.17 %, and a strength-plasticity product of 14.711 GPa·%.

{"title":"A machine learning method approach for designing novel high strength and plasticity metastable β titanium alloys","authors":"Zhiduo Liu , Haoyu Zhang , Shuai Zhang , Jun Cheng , Yixuan He , Ge Zhou , Jiawei Liu , Suping Song , Lijia Chen","doi":"10.1016/j.pnsc.2024.11.010","DOIUrl":"10.1016/j.pnsc.2024.11.010","url":null,"abstract":"<div><div>In order to improve efficiency and reduce costs, four machine learning models were established for the design of metastable β titanium alloys, including the Adaboost model, the LightGBM model, the Voting model, and the Stacking model. The accuracy of these models was evaluated, and all models exhibited excellent accuracy for tensile strength, yield strength, and elongation. The values of R-squared coefficients(<em>R</em><sup>2</sup>) all greater than 0.9. Among them, the LightGBM model showed the highest accuracy, with relatively smallest values of mean absolute error (<em>MAE</em>) and root mean square error (<em>RMSE</em>) and relatively largest value of <em>R</em><sup>2</sup>. To further verify the accuracy of the model, a metastable β titanium alloy Ti-5.5Cr-5Al-4Mo-3Nb-2Zr was designed by the LightGBM model. The predicted values of the alloy's tensile strength, yield strength, and elongation under three heat treatment processes were in high agreement with the experimental values. The alloy exhibited optimal strength-plasticity matching after undergoing a solution treatment at 850 °C for 0.5 h, followed by aging at 650 °C for 8 h, with a tensile strength of 1317 MPa, an elongation of 11.17 %, and a strength-plasticity product of 14.711 GPa·%.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 156-165"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dodecylamine-mediated synthesis of caron-supported platinum-ruthenium alloy nanoparticles with ultrafine sizes towards high-efficiency methanol oxidation electrocatalysis

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.011

Liang Chu , Zheng Rong , Mengyuan Ma , Feng Guo , Shaonan Tian , Jun Yang

For fully leveraging the advantages of PtRu alloys as electrocatalysts to catalyze methanol oxidation reaction (MOR), we herein report an ambient-temperature method for directly synthesizing carbon-supported PtRu alloy nanoparticles with ultrafine sizes in an organic medium towards high-efficiency MOR. This strategy involves the dodecylamine (DDA)-mediated extraction of Pt and Ru ions from water to toluene, and then mixing them with carbon substrate, followed by NaBH₄ reduction in the same organic medium. Profiting from their ultrafine sizes of ca. 1.68 nm, the as-prepared PtRu nanoparticles supported on carbon substrate show a mass activity of 0.93 A mg⁻¹ and a speciﬁc activity of 10.56 mA cm⁻², respectively, both of which are much higher than those of the commercial PtRu/C catalyst.

引用次数: 0

Recent advances in photopolymerization 3D printing of alumina-ceramic

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.07.013

M. Irfan Hussain , Min Xia , XiaoNa Ren , Zhen Shen , Muhammad Jamil , Changchun Ge

Digital light processing (DLP) 3D printing has a huge potential for manufacturing intricate and customized ceramic parts with high precision and cost-effectiveness. Research in this field contributes to material innovation, opening the avenues for new process designs in both scientific and industrial sectors. However, the implementation of DLP 3D printing technology in ceramic research has not yet reached the maturity level as that in polymer and tissue engineering. Necessarily, a holistic in-depth literature reporting the successful integration of alumina ceramics within DLP 3D printing technology is urgently needed. This review, systematic examines recent progress in DLP technology, focusing on photopolymer resins that incorporate UV-sensitive monomers, photoinitiators, and dispersants, as well as their synergistic effects on achieving high-quality printing, desirable material properties, and enhanced performance. Further, the review discusses key factors including post-processing characteristics such as debinding and sintering, which influence microstructure, and defect formation including microcracks, porosity and voids. Finally, the challenges associated with printing and sintering are highlighted, aiming to identify focused focused development pathways and potential solution to optimize outcomes. This analysis clarifies existing challenges and also propsoes future applications for DLP technology in the alumina-ceramic field.

{"title":"Recent advances in photopolymerization 3D printing of alumina-ceramic","authors":"M. Irfan Hussain , Min Xia , XiaoNa Ren , Zhen Shen , Muhammad Jamil , Changchun Ge","doi":"10.1016/j.pnsc.2024.07.013","DOIUrl":"10.1016/j.pnsc.2024.07.013","url":null,"abstract":"<div><div>Digital light processing (DLP) 3D printing has a huge potential for manufacturing intricate and customized ceramic parts with high precision and cost-effectiveness. Research in this field contributes to material innovation, opening the avenues for new process designs in both scientific and industrial sectors. However, the implementation of DLP 3D printing technology in ceramic research has not yet reached the maturity level as that in polymer and tissue engineering. Necessarily, a holistic in-depth literature reporting the successful integration of alumina ceramics within DLP 3D printing technology is urgently needed. This review, systematic examines recent progress in DLP technology, focusing on photopolymer resins that incorporate UV-sensitive monomers, photoinitiators, and dispersants, as well as their synergistic effects on achieving high-quality printing, desirable material properties, and enhanced performance. Further, the review discusses key factors including post-processing characteristics such as debinding and sintering, which influence microstructure, and defect formation including microcracks, porosity and voids. Finally, the challenges associated with printing and sintering are highlighted, aiming to identify focused focused development pathways and potential solution to optimize outcomes. This analysis clarifies existing challenges and also propsoes future applications for DLP technology in the alumina-ceramic field.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 1-30"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulation of charge density wave and superconductivity in kagome superconductor CsV3Sb5 by intercalation

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.11.001

Han Xiao , Yingxu Zhang , Lixuan Yu , Mengjuan Mi , Xiangqi Liu , Qihui Cui , Bingbing Lyu , Yanfeng Guo , Min Liu , Shanpeng Wang , Yilin Wang

AV₃Sb₅ (A = K, Rb, and Cs), recently discovered van der Waals Kagome metals, exhibit a multitude of intriguing strongly correlated phenomena, particularly the unconventional charge density wave (CDW) and superconductivity, and thus have generated tremendous attention. In this study, we modulated CDW orders and superconductivity in CsV₃Sb₅ flakes utilizing an ionic-gel electrolyte (LiClO₄/PEO), which also serves as a protective layer to prevent the CsV₃Sb₅ thin flakes from being degraded in air. The dominated carriers of pristine CsV₃Sb₅ undergoes a transition from electron-type above 50 K to hole-type below 10 K, while both electron and hole carriers participate in the transport process at 25 K. The CDW transition temperature increases (from 86 K up to 106 K) and behaves a positive correlation with the electron-type carrier concentration, while the superconducting transition temperature decreases and behaves a negative correlation with the hole-type carrier concentration. The regulation of carrier density induces a shift in the relative positions of Fermi level and van Hove singularities, leading to the modulation of CDW order and superconductivity. Our work demonstrates CsV₃Sb₅ as a versatile platform for tuning CDW order and superconductivity, and provides valuable insights into the physical properties of Kagome metals.

{"title":"Regulation of charge density wave and superconductivity in kagome superconductor CsV3Sb5 by intercalation","authors":"Han Xiao , Yingxu Zhang , Lixuan Yu , Mengjuan Mi , Xiangqi Liu , Qihui Cui , Bingbing Lyu , Yanfeng Guo , Min Liu , Shanpeng Wang , Yilin Wang","doi":"10.1016/j.pnsc.2024.11.001","DOIUrl":"10.1016/j.pnsc.2024.11.001","url":null,"abstract":"<div><div>AV<sub>3</sub>Sb<sub>5</sub> (A = K, Rb, and Cs), recently discovered van der Waals Kagome metals, exhibit a multitude of intriguing strongly correlated phenomena, particularly the unconventional charge density wave (CDW) and superconductivity, and thus have generated tremendous attention. In this study, we modulated CDW orders and superconductivity in CsV<sub>3</sub>Sb<sub>5</sub> flakes utilizing an ionic-gel electrolyte (LiClO<sub>4</sub>/PEO), which also serves as a protective layer to prevent the CsV<sub>3</sub>Sb<sub>5</sub> thin flakes from being degraded in air. The dominated carriers of pristine CsV<sub>3</sub>Sb<sub>5</sub> undergoes a transition from electron-type above 50 K to hole-type below 10 K, while both electron and hole carriers participate in the transport process at 25 K. The CDW transition temperature increases (from 86 K up to 106 K) and behaves a positive correlation with the electron-type carrier concentration, while the superconducting transition temperature decreases and behaves a negative correlation with the hole-type carrier concentration. The regulation of carrier density induces a shift in the relative positions of Fermi level and van Hove singularities, leading to the modulation of CDW order and superconductivity. Our work demonstrates CsV<sub>3</sub>Sb<sub>5</sub> as a versatile platform for tuning CDW order and superconductivity, and provides valuable insights into the physical properties of Kagome metals.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 122-128"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel Li-ion based transistor within LiCoO2/Li6.75La3Zr1.5Ta0.5O12/Ag scheme

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.005

Jixiang Yin , Houning Song , Peirong Li , Yuzhi Xing , Supeng Chen , Qi Liang , Yu Feng , Dong Yang , Wenxiao Zhao , Dong Wang , Qinghao Li , Pengfei Yu , Qiang Li , Xiaosong Liu , Yanxue Chen

Traditional electronic devices are reaching their physical limits as they shrink in size to improve integration. Solid ionic devices have become promising candidate to avoid tunneling effect and address these constraints, but the response time are typically sluggish. In recent years, the rapid development of solid electrolyte and solid-state battery provide superior choices to overcome limitations in ion transport. In this work, we construct an ionic transistor within Ag/LiCoO₂/Li_6.75La₃Zr_1.5Ta_0.5O₁₂ (LLZTO)/Ag structure. LiCoO₂ serves as the channel layer of the transistor, with LLZTO acting as the electrolyte to isolate electrons and facilitate ion conduction, and Ag as the gate/anode. XRD, Raman spectroscopy, and electrochemical characterization confirm lithiation and delithiation. Transport characterization demonstrates the continuous resistive switching of the LiCoO₂ channel layer between high and low resistive states under pulsed gate voltage control, exhibiting high reversibility and long cycle stability. By combining X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES), the transition between high and low resistive states can be well clarified by a first-order Mott transition scheme. These results provide new perspectives for performance improvement and further development of ionic devices.

{"title":"A novel Li-ion based transistor within LiCoO2/Li6.75La3Zr1.5Ta0.5O12/Ag scheme","authors":"Jixiang Yin , Houning Song , Peirong Li , Yuzhi Xing , Supeng Chen , Qi Liang , Yu Feng , Dong Yang , Wenxiao Zhao , Dong Wang , Qinghao Li , Pengfei Yu , Qiang Li , Xiaosong Liu , Yanxue Chen","doi":"10.1016/j.pnsc.2024.12.005","DOIUrl":"10.1016/j.pnsc.2024.12.005","url":null,"abstract":"<div><div>Traditional electronic devices are reaching their physical limits as they shrink in size to improve integration. Solid ionic devices have become promising candidate to avoid tunneling effect and address these constraints, but the response time are typically sluggish. In recent years, the rapid development of solid electrolyte and solid-state battery provide superior choices to overcome limitations in ion transport. In this work, we construct an ionic transistor within Ag/LiCoO<sub>2</sub>/Li<sub>6.75</sub>La<sub>3</sub>Zr<sub>1.5</sub>Ta<sub>0.5</sub>O<sub>12</sub> (LLZTO)/Ag structure. LiCoO<sub>2</sub> serves as the channel layer of the transistor, with LLZTO acting as the electrolyte to isolate electrons and facilitate ion conduction, and Ag as the gate/anode. XRD, Raman spectroscopy, and electrochemical characterization confirm lithiation and delithiation. Transport characterization demonstrates the continuous resistive switching of the LiCoO<sub>2</sub> channel layer between high and low resistive states under pulsed gate voltage control, exhibiting high reversibility and long cycle stability. By combining X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES), the transition between high and low resistive states can be well clarified by a first-order Mott transition scheme. These results provide new perspectives for performance improvement and further development of ionic devices.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 194-200"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of temperature on the deformation mechanism and mechanical property of hexagonal titanium under a specific loading condition

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.010

Junyang Jin, Jude Zhang, Wujing Fu, Hao Wu

The present study is devoted to investigating the temperature-dependent mechanical properties of hexagonal titanium when deformed at an angle of 45° to the rolling-transverse plane. Our results demonstrated enhancements in both strength and ductility at liquid nitrogen temperature. Such a superior mechanical property was attributed to the significantly elevated activity of {11–22} twins and prismatic <a> slip. Our findings are therefore expected to enrich the understanding of how loading orientation influences the mechanical properties and deformation mechanisms of hexagonal titanium.

引用次数: 0

Non-metal plasmonic TiN sensitized 2D CdS nanosheet arrays for efficient visible light-driven photoelectrochemical hydrogen evolution and photocatalytic degradation performance

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.007

Desheng Ni , Xinglin Jia , Jianan Li , Shicheng Liu , Lei Liu , Wenzhong Wang , Guling Zhang , Bin Zou , Lijuan Wang , Qing Zhou

Here, a novel non-metal plasmonic TiN sensitized two-dimensional (2D) CdS nanosheet arrays (NSAs) were constructed for high-efficiency photoelectrochemical (PEC) hydrogen evolution as well as photocatalytic pollutant degradation under bias-free visible light illumination for the first time. For this patent heterogeneous nano-structures, the large surface area enables 2D CdS NSAs further to facilitate visible light absorption, as well as afford much active regions to absorb TiN nanoparticles (NPs) for boosting light energy utilization through the wide surface plasmon resonance (SPR) absorption feature of TiN. Additionally, the numerous SPR-induced TiN hot electron injection into 2D CdS efficiently augment carrier concentration. Moreover, the establishment of Schottky junction between CdS nanosheet and TiN NPs is in favour of charge migration and separation. The optimized 2D CdS/TiN NSAs achieved an obviously enhanced hydrogen production rate up to 217.2 μmol h⁻¹, 2.02-fold higher than that of pure 2D CdS NSAs. Furthermore, the organic dye Congo red degradation efficiency on the 2D CdS/TiN NSAs reached up to 93.1 % under visible light irradiation for 120 min. The remarkably enhanced photocatalytic pollutant degradation and PEC hydrogen evolution of the 2D CdS/TiN NSAs can be attributed to the cooperative action of CdS/TiN Schottky junction and SPR effect of TiN. The demonstrations of present study offer new insights into designing non-metal-based plasmonic photocatalysts for high-efficiency PEC hydrogen generation and photocatalytic pollutant degradation from the perspectives of the visible light absorption and carrier separation and injection.

{"title":"Non-metal plasmonic TiN sensitized 2D CdS nanosheet arrays for efficient visible light-driven photoelectrochemical hydrogen evolution and photocatalytic degradation performance","authors":"Desheng Ni , Xinglin Jia , Jianan Li , Shicheng Liu , Lei Liu , Wenzhong Wang , Guling Zhang , Bin Zou , Lijuan Wang , Qing Zhou","doi":"10.1016/j.pnsc.2024.12.007","DOIUrl":"10.1016/j.pnsc.2024.12.007","url":null,"abstract":"<div><div>Here, a novel non-metal plasmonic TiN sensitized two-dimensional (2D) CdS nanosheet arrays (NSAs) were constructed for high-efficiency photoelectrochemical (PEC) hydrogen evolution as well as photocatalytic pollutant degradation under bias-free visible light illumination for the first time. For this patent heterogeneous nano-structures, the large surface area enables 2D CdS NSAs further to facilitate visible light absorption, as well as afford much active regions to absorb TiN nanoparticles (NPs) for boosting light energy utilization through the wide surface plasmon resonance (SPR) absorption feature of TiN. Additionally, the numerous SPR-induced TiN hot electron injection into 2D CdS efficiently augment carrier concentration. Moreover, the establishment of Schottky junction between CdS nanosheet and TiN NPs is in favour of charge migration and separation. The optimized 2D CdS/TiN NSAs achieved an obviously enhanced hydrogen production rate up to 217.2 μmol h<sup>−1</sup>, 2.02-fold higher than that of pure 2D CdS NSAs. Furthermore, the organic dye Congo red degradation efficiency on the 2D CdS/TiN NSAs reached up to 93.1 % under visible light irradiation for 120 min. The remarkably enhanced photocatalytic pollutant degradation and PEC hydrogen evolution of the 2D CdS/TiN NSAs can be attributed to the cooperative action of CdS/TiN Schottky junction and SPR effect of TiN. The demonstrations of present study offer new insights into designing non-metal-based plasmonic photocatalysts for high-efficiency PEC hydrogen generation and photocatalytic pollutant degradation from the perspectives of the visible light absorption and carrier separation and injection.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":"35 1","pages":"Pages 201-214"},"PeriodicalIF":4.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in porous structures for oxygen reduction reaction

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.003

Ying Chen , Huawei Wang , Yujing Li

As environmental concerns grow, there is a global shift from traditional fossil energy. Hydrogen fuel cells are gaining attention, but high material costs limit their adoption in large scale. The oxygen reduction reaction at the cathode of fuel cell, which dominates the electrochemical kinetics, relies mainly on platinum-group-metal (PGM) catalysts, hence research is focused on minimizing PGM or developing non-PGM catalysts. Porous materials possess unique physicochemical properties, and have shown great potential in advancing catalyst technology in fuel cells. This review summarizes the recent fundamental and technological advances of porous catalysts for oxygen reduction reactions including PGM and non-PGM catalysts, discusses the mechanisms underlying the enhanced catalytic activity through structural design and surface modification. It also highlights the comprehensive impact of porous materials in oxygen reduction reactions and membrane electrode assemblies, the main challenges, and provides perspectives on research of porous catalyst.

引用次数: 0

Facile formation of Mg-containing interphase on nanosilicon from Agar/MgCO3 precursor for lithium-ion battery anodes

IF 4.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Progress in Natural Science: Materials International

Pub Date : 2025-02-01 DOI: 10.1016/j.pnsc.2024.12.002

Ke Zhang , Jianhua Zhou , Haoran Liu , Xiaoyang Wang , Jie Gao , Jun-Liang Chen , Haiqing Qin , Wenping Liu , Xiaoxu Lei , Lei Miao

The ultra-high theoretical capacity (4200 mAh g⁻¹) of Silicon anode materials for lithium-ion batteries while which is one of the ideal replacement materials for graphite anodes. However, the poor electrical conductivity and greatly reduces the cycle life of the battery of Silicon material, which suffers from severe volume expansion during charge/discharge cycling leading to electrode pulverization. In this work, Agar/magnesium carbonate-coated silicon nanocomposites were synthesized by utilizing the "self-solidifying" property of agar. The magnesium oxide formed by the decomposition of magnesium carbonate at high temperatures mitigates the volume expansion of nanosilicon together with the derived carbon layer. Moreover, the lithium-magnesium alloy electron-conducting interface layer generated by the reaction between lithium ions and magnesium oxide, which greatly shortens the diffusion length of lithium ions and electrons inside the electrode during the charge-discharge cycle. The first discharge specific capacity was 2060.2 mAh g⁻¹, the Coulombic efficiency as high as 86.28 %, and still possesses a reversible specific capacity of 801.5 mAh g⁻¹ after cycling 200 cycles at a high current of 500 mA g⁻¹ of Agar/magnesium@Si with optimal ratio composite. The composite material used in this work largely suppresses the volume expansion of the silicon anode and contributes to the design of low-cost and high Coulombic efficiency lithium-ion batteries.

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