Cu_(x)O/TiO_(2)纳米颗粒的制备及其光催化性能研究  

The Preparation of Cu_(x)O/TiO_(2) Nanoparticles andIts Photocatalytic Activity

作　　者：李瑞瑞 牛炳康 柴猛 袁博 赵嘉翔 郭婧[1,2] LI Ruirui;NIU Bingkang;CHAI Meng;YUAN Bo;ZHAO Jiaxiang;GUO Jing(School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China;Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering,North University of China,Taiyuan 030051,China;Ordos Carbon Neutralization Research and Application Co.,Ltd.,Ordos 017000,China)

机构地区：[1]中北大学化学与化工学院,山西太原030051 [2]中北大学超重力化工过程山西省重点实验室,山西太原030051 [3]鄂尔多斯市碳中和研究应用有限公司,内蒙古鄂尔多斯017000

出　　处：《中北大学学报（自然科学版）》2023年第4期403-415,共13页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金青年基金(21808214);山西省自然科学基金青年基金(201901D211222);山西省高等学校创新项目(2019L0515);山西省留学回国人员择优资助项目(20220013)。

摘　　要：为拓宽TiO_(2)的光响应范围,降低其光生电子-空穴对的复合速率,以TiO_(2)纳米颗粒为载体,采用液相沉积法制备了系列不同Cu_(x)O负载量的Cu_(x)O/TiO_(2)光催化剂,并以罗丹明B染料为目标降解物来探究其光催化性能。在15 W紫外灯照射下,0.08-Cu_(x)O/TiO_(2)光催化剂表现出最优的罗丹明B降解率,其活性是商业锐钛矿型TiO_(2)的7.5倍。450℃煅烧可使Cu_(x)O/TiO_(2)光催化剂的光响应范围扩大,光生电子-空穴对复合速率降低,但其光催化活性反而大大降低。由自由基捕获实验可知,Cu_(x)O/TiO_(2)光催化剂降解罗丹明B过程中起主要作用的是羟基自由基,同时还有部分空穴发生了直接氧化作用并参与了降解。In order to broaden the optical response range and reduce the recombination rate of electron-hole pairs of TiO_(2),a series of Cu_(x)O/TiO_(2) photocatalysts with different Cu_(x)O loadings were prepared by liquid-phase deposition method using TiO_(2) nanoparticles as the support.The photocatalytic performance of the Cu_(x)O/TiO_(2) was investigated by the degradation of Rhodamine B.The optimized 0.08-Cu_(x)O/TiO_(2) photocatalyst showed the excellent Rhodamine B degradation performance under the irradiation of 15W UV lamp,which was 7.5 times that of commercial TiO_(2) nanoparticles.After calcination at 450℃,the optical response range of the Cu_(x)O/TiO_(2) photocatalyst was expanded and the recombination rate of photogenerated electron-hole pairs was reduced,but its photocatalytic activity was greatly reduced.The free radical capture experiment showed that for the Cu_(x)O/TiO_(2) photocatalyst,the degradation of Rhodamine B mainly through the oxidation of hydroxyl radicals,and the direct oxidation of some of the holes also takes part of the degradation.

关 键 词：二氧化钛 氧化亚铜 光催化 液相沉积 罗丹明B 

分 类 号：TQ134.11[化学工程—无机化工]