Synthesis and characterization of Cu2O-modified Bi2O3 nanospheres with enhanced visible light photocatalytic activity

被引：40
作者：
Luo, Yidan [1 ]
Huang, Qingqing [1 ]
Li, Bin [1 ]
Dong, Lihui [1 ]
Fan, Minguang [1 ]
Zhang, Feiyue [1 ]
机构：
[1] Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Sch Chem & Chem Engn, Nanning 530004, Guangxi, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2015年 / 357卷
基金：
中国博士后科学基金;
关键词：
Nanospheres; Surface modification; Photocatalysis; CHARGE-TRANSFER ABSORPTION; PLASMONIC PHOTOCATALYST; HYDROTHERMAL SYNTHESIS; CONTROLLABLE SYNTHESIS; CU2O NANOPARTICLES; DEGRADATION; OXIDE; PHOTODEGRADATION; PHOTOACTIVITY; ALPHA-BI2O3;
D O I：
10.1016/j.apsusc.2015.09.126
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, a series of Cu2O-modified Bi2O3 nanospheres with perfect visible-light catalytic activity were successfully synthesized via the two-step method. The obtained products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) surface area, UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS). In the catalysts of Cu2O-modified Bi2O3 nanospheres, Cu2O was dispersed on the surface of Bi2O3 nanospheres. All of Cu2O-modified Bi2O3 nanospheres showed uniformly nanospheres with the size of 80-150 nm, and exhibited enhanced photocatalytic activity in the degradation of Rhodamine B. The higher BET surface area, the band gap narrowing, and the interfacial charge transfer effect were considered to cause the excellent photocatalysis of Cu2O loading Bi2O3 samples. Furthermore, the possible photocatalysis mechanism was proposed. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：1072 / 1079
页数：8
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