Preparation of BiVO4 Hollow Spheres and its Photocatalytic Degradation of Methylene Blue

被引：5

作者：

Ma, Zhan-ying ^{[1
,2
]}

Yao, Bing-hua ^{[1
]}

机构：

[1] Xian Univ Technol, Dept Appl Chem, Xian 710054, Peoples R China

[2] Xianyang Normal Univ, Coll Chem & Chem Engn, Xianyang 712000, Peoples R China

来源：

CHINESE JOURNAL OF CHEMICAL PHYSICS | 2013年 / 26卷 / 03期

关键词：

BiVO4; Preparation; Hollow spheres; Photocatalysis; VISIBLE-LIGHT; TIO2; NANOSTRUCTURES; IRRADIATION;

D O I：

10.1063/1674-0068/26/03/341-346

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Monoclinic BiVO4 hollow nanospheres were successfully prepared via template-free method using citric acid (C6H8O7) as chelating agent and characterized by X-ray diffraction patterns, transmission electron microscope, UV-Vis DRS, and TG-DTA technique. C6H8O7 played an important role in the formation of hollow spheres. Morphology observations revealed that when appropriate amount of C6H8O7 was introduced, the cavity with the diameter of 40 nm was obtained in BiVO4 nanospheres. UV-Vis diffuse reflectance spectra indicated that the samples had absorption in both UV and visible light region. The photocatalytic activities were evaluated by the degradation of methylene blue under Xe lamp irradiation. Hollow spheres endow BiVO4 samples with greatly improved photocatalytic activity. A possible formation mechanism of hollow spheres was proposed.

引用

页码：341 / 346

页数：6

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