化工进展 ›› 2025, Vol. 44 ›› Issue (2): 957-970.DOI: 10.16085/j.issn.1000-6613.2024-0295

• 材料科学与技术 • 上一篇    下一篇

木质纤维素基生物质炭改性半导体及其光催化应用

方碧瑶(), 邱健豪(), 李伊馨, 姚建峰()   

  1. 南京林业大学化学工程学院,江苏省林业资源高效加工利用协同创新中心,江苏 南京 210037
  • 收稿日期:2024-02-19 修回日期:2024-03-24 出版日期:2025-02-25 发布日期:2025-03-10
  • 通讯作者: 邱健豪,姚建峰
  • 作者简介:方碧瑶(2002—),女,硕士研究生,研究方向为光催化材料构筑及应用。E-mail:byaofang@qq.com
  • 基金资助:
    江苏省林业科技创新与推广项目(LYKJ[2021]04);国家自然科学基金(32371812);江苏省自然科学基金(BK20210628)

Lignocellulose-derived biochar-modified semiconductors and their photocatalytic applications

FANG Biyao(), QIU Jianhao(), LI Yixin, YAO Jianfeng()   

  1. College of Chemical Engineering, Jiangsu Co-innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
  • Received:2024-02-19 Revised:2024-03-24 Online:2025-02-25 Published:2025-03-10
  • Contact: QIU Jianhao, YAO Jianfeng

摘要:

因木质纤维素基生物质炭具有表面官能团丰富、结构易于调控及化学性质稳定等优点,其被广泛应用于催化、吸附及电化学等领域。其中,在光催化材料的构筑中,生物质炭能够改善半导体吸光差、光生载流子分离效率低、活性位点较少、比表面积较小等问题,进而优化其光催化性能。本文重点讨论了纤维素和木质素基生物质炭用于不同半导体(TiO2、g-C3N4及ZnO等)的改性,改性方式包括复合改性和掺杂改性,复合改性又分为碳点复合和以炭为载体两种形式。同时,详细介绍了改性后的催化剂在各种光催化应用[光催化有机污染物降解、Cr(Ⅵ)还原、产氢及产H2O2等]中的性能表现。最后,从催化材料设计和光催化应用角度分别讨论了木质纤维素基生物质炭改性半导体用于光催化的研究现状及存在的问题,并提出了相应的解决方案。另外,还展望了该领域的未来发展前景。本文能够为生物质衍生炭的应用及光催化材料的设计提供较为深入的见解和指引。

关键词: 纤维素, 木质素, 生物质炭, 半导体, 光催化

Abstract:

Lignocellulose-derived biochar has been widely used in the fields of catalysis, adsorption and electrochemistry due to its merits including abundant surface functional groups, tunable structures and stable chemical properties. Among them, in the construction of photocatalysts, biochar can improve the weak light absorption, low separation efficiency of photo-generated charge carriers, insufficient active sites and low specific surface area of semiconductors so as to optimize their photocatalytic performances. This review mainly focused on different semiconductors (TiO2, g-C3N4 and ZnO, etc.) decorated by cellulose and lignin-derived biochar. The modification strategies included carbon combination and carbon doping, and the strategy of carbon combination could be further distinguished into carbon dot combination and carbon as scaffolds. Meanwhile, performances of modified catalysts in diverse photocatalytic applications (photocatalytic degradation of organic pollutants, reduction of Cr(Ⅵ), H2 evolution and H2O2 production, et al.) were introduced in detail. Finally, the research status and existing problems of lignocellulose-derived biochar-modified semiconductors for photocatalysis were discussed respectively from the perspective of catalyst design and photocatalytic application, and the corresponding solutions were proposed. In addition, the future development prospects in this field were also presented. This review could provide insight and guidance on the application of biomass-derived carbon and the design of photocatalysts.

Key words: cellulose, lignin, biochar, semiconductor, photocatalysis

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