Effects of citric acid and urea on the structural and morphological characteristics of BiVO4 synthesized by the sol-gel combustion method

被引：26

作者：

Chen, Long ^{[1
]}

Wang, Junxia ^{[1
]}

Meng, Dawei ^{[1
]}

Xing, Yulin ^{[1
]}

Tian, Xiaoyun ^{[1
]}

Yu, Xiaohong ^{[1
]}

Xu, Kun ^{[1
]}

Wu, Xiuling ^{[1
]}

机构：

[1] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2015年 / 76卷 / 03期

基金：

中国国家自然科学基金;

关键词：

BiVO4; Sol-gel combustion; Citric acid; Urea; Microsphere; Photocatalysis; VISIBLE-LIGHT; PHOTOCATALYTIC DEGRADATION; HIERARCHICAL STRUCTURES; FACILE SYNTHESIS; SHAPED BIVO4; RHODAMINE-B; TEMPERATURE; PERFORMANCE; WATER; FABRICATION;

D O I：

10.1007/s10971-015-3806-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Micro-sized spherical BiVO4 photocatalysts composed of nanoparticles were synthesized by the sol-gel combustion method. The effects of citric acid and urea on the structural and morphological characteristics of samples were studied by X-ray diffraction, field emission scanning electron microscopy, N-2 adsorption and desorption and UV-Vis spectroscopy. The photocatalytic activity was evaluated by the photocatalytic degradation of rhodamine B under visible light. The results showed the sphere-shaped BiVO4 sample to have excellent photocatalytic performance compared with the bulk sample prepared by solid-state reaction. This enhancement could be attributed to the special spherical morphology, which enhanced the absorption ability, increased the separation efficiency of photon-generated carriers and improved surface reaction sites for consumption of photon-generated carriers. Uniform micro-sized spherical BiVO4 samples composed of nanoparticles were successfully synthesized by the sol-gel combustion method. The relationships between the morphologies and citric acid with urea contents were studied by using the field emission scanning electron microscopy (FE-SEM) technology. [GRAPHICS] .

引用

页码：562 / 571

页数：10

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