具有气-液-固三相界面的二维/二维石墨相氮化碳@碘氧铋S型异质结高效光催化二氧化碳还原  

2D/2D g-C_(3)N_(4)@BiOI S-scheme heterojunction with gas-liquid-solid triphase interface for highly efficient CO_(2) photoreduction

作　　者：杨超 张庆贺 王往 程蓓 余家国 曹少文 Chao Yang;Qinghe Zhang;Wang Wang;Bei Cheng;Jiaguo Yu;Shaowen Cao(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Hubei Technology Innovation Center for Advanced Composites,Wuhan University of Technology,Wuhan 430070,China;Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China [2]Hubei Technology Innovation Center for Advanced Composites,Wuhan University of Technology,Wuhan 430070,China [3]Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China

出　　处：《Science China Materials》2024年第6期1830-1838,共9页中国科学（材料科学）（英文版）

基　　金：supported by the National Key R&D Program of China (2022YFE0114800);the National Natural Science Foundation of China (22278324 and 52073223)。

摘　　要：在过去几十年中,将二氧化碳光还原转化为有用的化学燃料(甲烷、一氧化碳和甲醇等)受到了极大的关注.然而,由于光生电荷的复合速度快,二氧化碳和水分子的共吸附不足,目前的二氧化碳光还原系统的效率还远远不能令人满意.本文报道了在疏水碳纤维纸上构建一个紧密的二维/二维石墨相氮化碳@碘氧铋梯型(S型)异质结,用于高效的二氧化碳光还原.所制备的异质结具有良好的一氧化碳选择性(77.8%)和活性(458.0μmol h^(-1)m^(-2)).良好的光催化性能归因于良好设计的S型异质结结构,提高了电荷分离效率,以及形成了气-液-固三相界面,充分保证了二氧化碳和水的同时供给.这项工作为高效光催化二氧化碳还原系统的设计提供了新思路.Over the past decades,there has been con-siderable research attention dedicated to the conversion of CO_(2) into valuable chemical fuels such as CH_(4),CO,and CH3OH through CO_(2) photoreduction.Despite these efforts,the efficiency of current CO_(2) photoreduction systems remains unsatisfactory,primarily due to the rapid recombination of photoinduced charges and inadequate co-adsorption of CO_(2) and H2O molecules.Herein,we present a novel and highly efficient CO_(2) photoreduction system based on an intimate 2D/2D g-C_(3)N_(4)@BiOI step-scheme(S-scheme)heterojunction constructed on hydrophobic carbon fiber paper.The resulting heterojunction demonstrates outstanding photocatalytic ability for CO_(2) reduction,achieving high CO selectivity(77.8%)and activity(458.0μmol h^(-1) m^(-2) for CO).The re-markable photocatalytic performance can be attributed to the well-designed S-scheme heterojunction,which enhances charge separation efficiency,and the establishment of a gas-liquid-solid triphase interface,ensuring the simultaneous and sufficient supply of CO_(2) and H_(2)O.This work introduces new perspectives for the design of highly efficient photocatalytic CO_(2) reduction systems.

关 键 词：CO_(2)photoreduction S-scheme heterojunction tri-phase interface separation of charge carriers co-adsorption of CO_(2)and H2O 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]