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-C3N4@BiOI S-scheme heterojunction with gas-liquid-solid triphase interface for highly efficient CO2 photoreduction
杨超 1张庆贺 1王往 1程蓓 1余家国 2曹少文1
作者信息
- 1. 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
- 2. Laboratory of Solar Fuel,Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China
- 折叠
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(458.0 μmol 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.
Abstract
Over the past decades,there has been con-siderable research attention dedicated to the conversion of CO2 into valuable chemical fuels such as CH4,CO,and CH3OH through CO2 photoreduction.Despite these efforts,the efficiency of current CO2 photoreduction systems remains unsatisfactory,primarily due to the rapid recombination of photoinduced charges and inadequate co-adsorption of CO2 and H2O molecules.Herein,we present a novel and highly efficient CO2 photoreduction system based on an intimate 2D/2D g-C3N4@BiOI step-scheme(S-scheme)heterojunction constructed on hydrophobic carbon fiber paper.The resulting heterojunction demonstrates outstanding photocatalytic ability for CO2 reduction,achieving high CO selectivity(77.8％)and activity(458.0 μmol 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 CO2 and H2O.This work introduces new perspectives for the design of highly efficient photocatalytic CO2 reduction systems.
关键词
CO2 photoreduction/S-scheme heterojunction/tri-phase interface/separation of charge carriers/co-adsorption of CO2 and H2OKey words
CO2 photoreduction/S-scheme heterojunction/tri-phase interface/separation of charge carriers/co-adsorption of CO2 and H2O引用本文复制引用
基金项目
National Key R&D Program of China(2022YFE0114800)
National Natural Science Foundation of China(22278324)
National Natural Science Foundation of China(52073223)
出版年
2024
NETL
NSTL
万方数据