Preparation Cu_(x)Co_(1-x)for photocatalytic conversion of CO_(2)  

Cu_(x)Co_(1-x)的制备及其光催化转化CO_(2)的研究

作　　者：WANG Jingzhou YAO Chenzhong ZHANG Xisheng MA Ziwei 王景州;姚陈忠;张喜生;马紫微(运城学院物理与电子工程系,山西运城044000)

机构地区：[1]Department of Physics and Electronic Engineering,Yuncheng University,Yuncheng 044000,China

出　　处：《燃料化学学报(中英文)》2025年第4期462-471,共10页Journal of Fuel Chemistry and Technology

基　　金：supported by the Doctoral Research Start-up Project of Yuncheng University(YQ-2023067);Project of Shanxi Natural Science Foundation(202303021211189);Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Provinces(20220036);Shanxi Province Intelligent Optoelectronic Sensing Application Technology Innovation Center;Shanxi Province Optoelectronic Information Science and Technology Laboratory,Yuncheng University。

摘　　要：Metal nanoparticles with high surface area and high electrochemical activity exhibit excellent catalytic performance in the photocatalytic reduction of carbon dioxide(CO_(2)).However,poor stability,small specific surface area,and less active sites limits its solar energy utilization.Hydrothermal method was utilized to synthesize the bimetallic material of Cu_(x)Co_(1-x)in this work.Co was loaded onto the Cu surface due to the electrons generated by the surface plasmon resonance(SPR)effect occurring on the Cu surface.Cu_(x)Co_(1-x)exhibits high photocatalytic conversion of CO_(2)efficiency under irradiation,which mainly because the Co nanoparticles on the surface of Cu can be used as cocatalysts to enhance the photocharge transfer.Cu_(0.6)Co_(0.4)exhibits the comparatively best photocatalytic conversion efficiency of CO_(2)in the first 6 h light irradiation.The yields of CO and CH_(4)reached 35.26 and 2.71μmol/(g·h),respectively.Upon illumination,electrons were produced,with the majority of them moving towards the interface.This movement contributes to the increased lifetime of photogenerated electron-hole pairs,which in turn boosts the photocatalytic efficiency.The findings of this research provide significant insights for creating photocatalysts that are both highly effective and stable in CO_(2)reduction processes.具有高比表面积和高电化学活性的金属纳米粒子在二氧化碳(CO_(2))光催化还原方面表现出优良的催化性能,但其存在带隙宽、光吸收差和电子空穴的体复合限制了其对太阳能的利用。本工作采用水热法成功制备出了双金属材料Cu_(x)Co_(1-x)。由于在铜表面发生的表面等离子体共振(SPR)效应产生的电子,Co被负载到铜表面。Cu_(x)Co_(1-x)在光照条件下表现出较高的二氧化碳光催化转化效率,这主要是因为Cu表面的Co纳米颗粒可以作为助催剂来增强光电荷转移。Cu_(0.6)Co_(0.4)在前6 h具有最佳的二氧化碳光催化转化效率,当反应1 h后,CO和CH_(4)产率分别达到35.26和2.71μmol/(g·h)。这主要由于在光照条件下产生的光生电子大部分向界面移动,该移动有助于增加光生电子-空穴对的寿命,从而提高了光催化效率。本研究对开发高活性和高稳定性的CO_(2)还原光催化剂具有重要参考价值。

关 键 词：photocatalytic conversion hydrothermal technique surface plasmon resonance bimetallic material photoinduced charge 

分 类 号：O611.4[理学—无机化学]