无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2021, Vol. 53 ›› Issue (12): 21-28.doi: 10.19964/j.issn.1006-4990.2021-0614

• 无机新型材料——碳资源转化与利用 • 上一篇    下一篇

聚合氮化碳的制备、改性及光催化还原二氧化碳性能研究

李佳慧1(),李克艳1(),宋春山1,2,郭新闻1()   

  1. 1.大连理工大学化工学院,辽宁大连 116024
    2.香港中文大学理学院化学系
  • 收稿日期:2021-10-18 出版日期:2021-12-10 发布日期:2021-12-16
  • 作者简介:李佳慧(1997— ),女,硕士研究生,主要研究方向为光催化二氧化碳还原;E-mail: ljh17854232276@163.com
  • 基金资助:
    兴辽英才计划(XLYC2008032)

Study on preparation,modification and carbon dioxide photocatalytic reduction performance of polymeric carbon nitride

LI Jiahui1(),LI Keyan1(),SONG Chunshan1,2,GUO Xinwen1()   

  1. 1. School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China
    2. Department of Chemistry,Faculty of Science,Chinese University of Hong Kong
  • Received:2021-10-18 Published:2021-12-10 Online:2021-12-16

摘要:

由过量二氧化碳(CO2)排放导致的温室效应使得全球气候变暖问题日益紧迫,在“双碳”背景下,如何资源化利用CO2尤为重要。光催化还原CO2生成化学品和燃料是有望同时解决能源危机和环境问题的途径。非金属半导体聚合氮化碳(PCN)具有可见光响应、化学稳定性高、易于制备等优点,在光催化领域备受关注,但由传统热聚合方法得到的PCN存在比表面积小、电子-空穴对复合严重、对可见光吸收范围窄等不足之处。介绍了光还原CO2的反应机理和PCN的结构,总结了PCN的制备方法以及提升其光还原CO2性能的手段,包括形貌调控、异原子掺杂、缺陷工程和构建异质结等。最后,对目前PCN材料在CO2光还原反应研究中存在的问题进行了分析,并对未来发展方向进行了展望。

关键词: 光催化, 二氧化碳还原, 聚合氮化碳, 改性

Abstract:

The greenhouse effect caused by excessive carbon dioxide(CO2) emissions makes global warming increasingly ur-gent,under the background of “double carbon”,how to utilize CO2 is of particular importance.The photocatalytic reduction of CO2 to produce chemicals and fuels is a promising way to solve both energy crisis and environmental problems.Non-metal semiconductor,polymeric carbon nitride(PCN) has attracted much attention in the field of photocatalysis due to its visible light response,high chemical stability,easy preparation and low cost.However,PCN prepared by the traditional thermal polymerization method suffers from small specific surface area,serious electron-hole recombination as well as limited visible light response range.The reaction mechanism of CO2 photoreduction and the structure of PCN were introduced.The preparation methods of PCN and the modification methods for improved photocatalytic performance were summarized,including morpho-logy control,heteroatom doping,defect engineering and heterojunction construction.Finally,the problems existing in the research of PCN materials in CO2 photoreduction were analyzed,and the future development direction was prospected.

Key words: photocatalysis, carbon dioxide reduction, polymeric carbon nitride, modification

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