The band structure and photocatalytic mechanism for a CeO2-modified C3N4 photocatalyst

被引：32
|
作者：
Han, Zhongxing [1 ,2 ]
Yu, Yanlong [3 ]
Zheng, Wenjun [3 ]
Cao, Yaan [1 ,2 ]
机构：
[1] Nankai Univ, TEDA Appl Phys Inst, Minist Educ, MOE Key Lab Weak Light Nonlinear Photon, Tianjin 300457, Peoples R China
[2] Nankai Univ, Sch Phys, Tianjin 300457, Peoples R China
[3] Nankai Univ, Dept Mat Chem, Coll Chem, Tianjin 300457, Peoples R China
来源：
NEW JOURNAL OF CHEMISTRY | 2017年 / 41卷 / 18期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
VISIBLE-LIGHT PHOTOCATALYSIS; PHOTOLUMINESCENCE LIFETIME; CO2; REDUCTION; NITROGEN; HETEROSTRUCTURE; NANOCOMPOSITES; FABRICATION; ZNO;
D O I：
10.1039/c7nj01614j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of CeO2-modified C3N4 (C3N4/CeO2X%) heterostructure photocatalysts was synthesized via a hydrothermal method. Their band structure was studied via theoretical calculation and experimental characterization. The behavior of charge carriers was investigated via absorption spectra, PL, and timeresolved PL decay curves. It was found that the modification of CeO2 on C3N4 matched the energy band, enhanced absorption in the visible region, separated photogenerated electrons and holes. Owing to the modification of CeO2 on C3N4, the photocatalytic performance was significantly improved as compared to that of C3N4. This study may offer a new strategy to fabricate and design a band structure of a new photocatalyst with high photocatalytic performance.
引用
收藏
页码：9724 / 9730
页数：7
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