{"title":"Constructing surface oxygen vacancy-rich ln2O3-x/tubular carbon nitride S-scheme heterojunction for selective biomass-derivative oxidation coupled with H2 production","authors":"Xukai Xia, Yanyan Jia, Weikang Wang, Jifang Zhang, Lele Wang, Qinqin Liu","doi":"10.1016/j.jmst.2024.12.093","DOIUrl":null,"url":null,"abstract":"The integration of selective oxidation of renewable biomass and its derivatives with hydrogen (H<sub>2</sub>) production holds significant potential for simultaneously yielding value-added chemicals and “green H<sub>2</sub>”, contributing to addressing sustainability challenges. The S-scheme charge transfer mechanism enhances charge separation by maintaining strong redox potentials at both ends, facilitating both oxidation and reduction reactions. Herein, we synthesize a visible-light-responsive, oxygen vacancy-rich In<sub>2</sub>O<sub>3-</sub><em><sub>x</sub></em>/tubular carbon nitride (IO<sub>OV</sub>/TCN) S-scheme heterojunction photocatalyst via electrostatic adherence for selective 5-hydroxymethylfurfural (HMF) oxidation to 2,5-diformylfuran (DFF) and 2,5-furandicarboxylic acid (FDCA), alongside H<sub>2</sub> production. Under anaerobic conditions and visible-light irradiation, the optimal IO<sub>OV</sub>/TCN-10 catalyst achieves an HMF conversion of 94.8% with a selectivity of 53.6% for DFF and FDCA, and a H<sub>2</sub> yield of 754.05 μmol g<sup>−1</sup> in 3 h. The significantly improved photocatalytic activity results from enhanced visible-light absorption, reduced carrier recombination, and abundant catalytic active sites due to the synergistic effect of surface oxygen vacancies, the hollow nanotube-based architecture, and the S-scheme charge transfer mechanism. This work highlights the great potentials of S-scheme heterojunctions in biomass conversion for sustainable energy use and chemical production.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"47 1","pages":""},"PeriodicalIF":11.2000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science & Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jmst.2024.12.093","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The integration of selective oxidation of renewable biomass and its derivatives with hydrogen (H2) production holds significant potential for simultaneously yielding value-added chemicals and “green H2”, contributing to addressing sustainability challenges. The S-scheme charge transfer mechanism enhances charge separation by maintaining strong redox potentials at both ends, facilitating both oxidation and reduction reactions. Herein, we synthesize a visible-light-responsive, oxygen vacancy-rich In2O3-x/tubular carbon nitride (IOOV/TCN) S-scheme heterojunction photocatalyst via electrostatic adherence for selective 5-hydroxymethylfurfural (HMF) oxidation to 2,5-diformylfuran (DFF) and 2,5-furandicarboxylic acid (FDCA), alongside H2 production. Under anaerobic conditions and visible-light irradiation, the optimal IOOV/TCN-10 catalyst achieves an HMF conversion of 94.8% with a selectivity of 53.6% for DFF and FDCA, and a H2 yield of 754.05 μmol g−1 in 3 h. The significantly improved photocatalytic activity results from enhanced visible-light absorption, reduced carrier recombination, and abundant catalytic active sites due to the synergistic effect of surface oxygen vacancies, the hollow nanotube-based architecture, and the S-scheme charge transfer mechanism. This work highlights the great potentials of S-scheme heterojunctions in biomass conversion for sustainable energy use and chemical production.
期刊介绍:
Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.