复合材料Au/Cu_(2)O的合成及其光催化CO_(2)还原为CO活性研究  

Synthesis of Composite Au/Cu_(2)O and Study on Photocatalytic Reduction of CO_(2)to CO

作　　者：李艳[1] Li Yan(College of Physical Science and Technology,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《山东化工》2023年第2期59-62,共4页Shandong Chemical Industry

摘　　要：采用多元醇法制备不同质量百分比Au/Cu_(2)O催化剂,通过SEM、TEM、XPS等手段对复合材料的理化性质进行表征。在紫外-可见光照射下进行CO_(2)光还原实验研究。光还原实验表明,与纯Cu_(2)O相比,3%Au/Cu_(2)O具有优良的光催化性能。反应4 h后CO产量可达3.5μmol/g,比纯Cu_(2)O的产量高1.4倍。通过对其光学和电化学性能进行测试表明3%Au/Cu_(2)O的各项性能均优于纯Cu_(2)O。这归因于Au/Cu_(2)O催化剂光吸收性能的提高及Au纳米粒子作为助催化剂捕获Cu_(2)O堆积的多余电子从而促进催化剂光生载流子的分离与迁移,使得催化性能大大提高。Au/Cu_(2)O catalysts with different mass percentages were prepared by polyol method,and the physicochemical properties of the composites were characterized by SEM,TEM,XPS,etc.The experimental study of CO_(2)photoreduction was carried out under UV-visible light irradiation.Photoreduction experiments show that 3%Au/Cu_(2)O has excellent photocatalytic performance compared with pure Cu_(2)O.After 4 h of reaction,the CO yield can reach 3.5μmol/g,which is 1.4 times higher than that of pure Cu_(2)O.The optical and electrochemical properties of 3%Au/Cu_(2)O are better than pure Cu_(2)O.This is attributed to the improvement of the photoabsorption performance of the Au/Cu_(2)O catalyst and the Au nanoparticles as a cocatalyst to capture the excess electrons accumulated by Cu_(2)O to promote the separation and migration of photogenerated carriers of the catalyst,which greatly improves the catalytic performance.

关 键 词：Au/Cu_(2)O CO_(2) CO 光催化 还原 

分 类 号：O643[理学—物理化学]