Preparation and characterization of direct Z-scheme photocatalyst Bi2O3/NaNbO3 and its reaction mechanism

被引：124

作者：

Chen, Shifu ^{[1
,2
]}

Hu, Yingfei ^{[2
]}

Ji, Lei ^{[2
]}

Jiang, Xiaoliang ^{[2
]}

Fu, Xianliang ^{[2
]}

机构：

[1] Anhui Sci & Technol Univ, Dept Chem, Fengyang 233100, Anhui, Peoples R China

[2] Huaibei Normal Univ, Dept Chem, Huaibei 235000, Anhui, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2014年 / 292卷

关键词：

Photocatalyst; Bi2O3/NaNbO3; Z-scheme; Activity; Reaction mechanism; HYDROTHERMAL SYNTHESIS; HETEROJUNCTION PHOTOCATALYST; ELECTRONIC-STRUCTURE; X-RAY; DEGRADATION; MICROSPHERES; BI2O3/BATIO3; PERFORMANCE; PREDICTION; EVOLUTION;

D O I：

10.1016/j.apsusc.2013.11.144

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 paper, highly active Bi2O3/NaNbO3 photocatalyst was prepared by a facile ball milling method using NaNbO3 and Bi2O3 as precursors. The photocatalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflection spectroscopy (DRS), X-ray photoelectron spectra (XPS), and Brunauer-Emmett-Teller (BET) surface areas. The photocatalytic activity was evaluated by photocatalytic oxidation of rhodamine B (RhB). The results showed that the photodegradation rate of RhB for Bi2O3(5.0 wt%)/NaNbO3 photocatalyst is 6.3 times that of pure NaNbO3. The optimum percentage of doped Bi2O3 is 5.0 wt%. And the composite photocatalyst exhibits good stability. Based on the results of characterization by determining reactive species, terephthalic acid photoluminescence probing technique (TA-PL), and electron spin resonance (ESR) technology, it is proposed that the Bi2O3/NaNbO3 has the characteristic of direct Z-scheme type photocatalyst. The mechanism of increased photocatalytic activity was also discussed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：357 / 366

页数：10