Architecture of Cu2O@TiO2 core-shell heterojunction and photodegradation for 4-nitrophenol under simulated sunlight irradiation

被引：69

作者：

Chu, Sheng ^{[1
,2
]}

Zheng, Xinmei ^{[3
]}

Kong, Fei ^{[1
,2
]}

Wu, Guohao ^{[1
,2
]}

Luo, Leilei ^{[1
,2
]}

Guo, Yong ^{[1
,2
]}

Liu, Honglin ^{[3
]}

Wang, Ying ^{[1
,2
]}

Yu, Hongxia ^{[3
]}

Zou, Zhigang ^{[1
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, ERERC, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Sch Environm, Nanjing 210093, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 129卷 / 03期

基金：

中国博士后科学基金;

关键词：

Inorganic compounds; Semiconductors; Chemical synthesis; Heterostructures; VISIBLE-LIGHT IRRADIATION; PHOTOCATALYTIC DEGRADATION; HYDROGEN-PRODUCTION; WATER; SEMICONDUCTOR; CU2O/TIO2; CU2O; STABILITY; TIO2; FILM;

D O I：

10.1016/j.matchemphys.2011.06.004

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

A Cu2O@TiO2 core-shell heterojunction photocatalyst was prepared by an in situ hydrolysis and crystallization method. The as-prepared catalyst was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy and photoluminescence (PL) spectroscopy. Under simulated sunlight irradiation, it exhibited high photocatalytic activity and stability for 4-nitrophenol (4-NP) degradation. Compared with neat Cu2O and Cu2O/TiO2(PM) prepared by physical mixing, the heightened photocatalytic activity of Cu2O@TiO2 was attributed to the improvement of charge separation since large close interface was formed between the two semiconductors. The in situ method may generally be applied to develop other core-shell heterojunction photocatalysts. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1184 / 1188

页数：5

共 22 条

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