空心二氧化钛掺杂铜提升光催化二氧化碳还原性能  

Hollow Cu-doped TiO_(2) for enhancing photocatalytic CO_(2) reduction performance

作　　者：宋智佳 王岁岁 匡勤[1] SONG Zhijia;WANG Suisui;KUANG Qin(Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学化学化工学院化学系,福建厦门361005

出　　处：《无机盐工业》2023年第8期45-50,共6页Inorganic Chemicals Industry

基　　金：国家自然科学基金面上项目(22275153)。

摘　　要：光催化二氧化碳还原作为一种新兴绿色技术,有望同时解决能源危机和环境污染问题,因此近年来备受关注。TiO_(2)是目前研究最广泛的光催化剂之一,但也存在光吸收范围有限、光生载流子快速复合等不足。通过高温热解Ti基MOF(金属有机框架)前驱体可以将Cu掺杂进空心结构的TiO_(2)中。通过X射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)分析所制备的光催化剂的结构和形貌,并利用紫外可见漫反射光谱(UV-Vis DRS)和光致发光光谱(PL)探究构效关系。实验结果表明,Cu的掺杂可以增强光吸收能力,促进光生载流子分离,从而改善光催化CO_(2)还原性能,当Cu掺杂质量分数为0.50%时催化剂性能最佳,CO和CH_(4)的产量分别为6.3µmol/g和1.6µmol/g。Photocatalytic CO_(2) reduction,as a new green technology,is expected to simultaneously solve the energy crisis and environmental pollution problems,so it has attracted much attention in recent years.As one of the most widely studied photocatalysts,TiO_(2) still has the disadvantages of limited light absorption range and rapid recombination of photogenerated carriers.Cu can be doped into TiO_(2) with hollow structure by pyrolyzing Ti-based MOF(metal‐organic framework)precur‐sors.The structure and morphology of the as‐prepared photocatalysts were analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).In addition,the structure‐activity relationship was investigated using UV-Visible diffuse reflection spectroscopy(UV-Vis DRS)and photoluminescence spectroscopy(PL).The experimental results revealed that Cu doping could improve the light absorption capacity and promote the separa‐tion of photogenerated carries,thereby improving the performance in photocatalytic CO_(2) reduction.When Cu doping mass fraction was 0.50%,the catalyst exhibited the best performance,and the yield of CO and CH_(4) reached 6.3µmol/g and 1.6µmol/g,respectively.

关 键 词：光催化 二氧化碳还原 铜掺杂空心二氧化钛 

分 类 号：TQ426[化学工程]