摘要
The direct conversion of atmospheric CO_(2) into fuel via photocatalysis exhibits significant practical application value in advancing the carbon cycle.In this study,we established an electro-assisted photocatalytic system with dual compartments and interfaces,and coated Ag nanoparticles on the titanium nanotube arrays(TNTAs)by polydopamine modification.In the absence of sacrificial agent and alkali absorption liquid conditions,the stable,efficient and highly selective conversion of CO_(2) to CO at the gas-solid interface in ambient air was realized by photoelectric synergy.Specifically,with the assistance of potential,the CO formation rates reached 194.9μmol h^(−1) m^(−2) and 103.9μmol h^(−1) m^(−2) under ultraviolet and visible light irradiation,respectively;the corresponding CO_(2) conversion rates in ambient air were 30%and 16%,respectively.The excellent catalytic effect is mainly attributed to the formation of P–N heterojunction during the catalytic process and the surface plasmon resonance effect.Additionally,the introduction of solid agar electrolytes effectively inhibits the hydrogen evolution reaction and improves the electron utilization rate.This system promotes the development of photocatalytic technology for practical applications and provides new insights and support for the carbon cycle.
作者简介
Corresponding author:Hongzhong Zhang received a Ph.D.degree from Beijing University of Science and Technology in 2005.He is a professor in the School of Materials and Chemical Engineering of Zhengzhou University of Light Industry,a leader in key disciplines of environmental engineering in Henan Province,and a former chair of the National Natural Science Foundation of China.He is mainly engaged in the research of photocatalysis and membrane separation coupling technology and green homogeneous catalysis technology,E-mail:zhz@zzuli.edu.cn;Corresponding author:Jun Li received his Ph.D.degree from Wuhan University of Technology in 2019 and is an associate professor at Zhengzhou University.He has presided over the National Natural Science Foundation of China Youth Project and the China Postdoctoral Science Foundation.In recent years,he has been mainly engaged in the structural design,in-situ characterization of nanocatalysts and their application in the field of photocatalysis and electrocatalysis,E-mail:junli2019@zzu.edu.cn;Feng Yue entered the School of Materials and Chemical Engineering of Zhengzhou University of Light Industry in 2021,joined Professor Hongzhong Zhang's research group and studied for a master's degree in resources and environment.The main research topics are the synthesis of nanocatalysts and photocatalytic CO_(2) reduction at the gas-solid interface.
