Performance and mechanism of constructed CuO/CeO2 p-n heterojunction for photocatalytic degradation of methylene blue

被引：6
作者：
Chen, Huan-huan [1 ,2 ]
Luo, Shao-hua [1 ,2 ]
Lei, Xue-fei [1 ,2 ]
Teng, Fei [1 ,2 ]
Ji, Xian-bing [3 ]
Li, Xiao-dong [1 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
[2] Northeastern Univ Qinhuangdao, Key Lab Dielect & Electrolyte Funct Mat Hebei Prov, Qinhuangdao 066004, Peoples R China
[3] Hebei Univ Environm Engn, Dept Environm Engn, Qinhuangdao 066102, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 06期
基金：
中国国家自然科学基金;
关键词：
CuO; CeO2; 2; p-n heterojunction; photocatalytic mechanism; methylene blue; CUO-CEO2; CATALYSTS; OXIDATION; NANORODS; TETRACYCLINE; TEMPERATURE; FABRICATION; COMPOSITES;
D O I：
10.1016/S1003-6326(24)66518-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
CuO/CeO2 2 p-n heterojunction composites were synthesized using an easy microwave reflux method with homogeneous precipitation technology, and their photocatalytic performance in terms of methylene blue degradation was studied. The results showed that the degradation effect of the CuO/CeO2 2 heterojunction composites was substantially stronger than that of CeO2. 2 . The composite prepared with a Cu/Ce molar ratio of 1/3 (1/3 Cu/Ce) exhibited the highest catalytic activity, achieving a degradation efficiency of 96.2% within 180 min. The improved photocatalytic performance was attributed to the formation of a p-n heterojunction between CuO and CeO2, 2 , which considerably promoted the separation and transport of photogenerated carriers. The band offset of the CuO/CeO2 2 heterostructure was calculated; its valence band offset was 1.58 eV and conduction band offset was -0.48 eV, further demonstrating the formation of a p-n heterojunction.
引用
收藏
页码：1951 / 1964
页数：14
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