Cubic ZnWO4 nano-photocatalysts synthesized by the microwave-assisted precipitation technique

被引：46

作者：

Amouzegar, Z. ^{[1
,2
]}

Naghizadeh, R. ^{[1
]}

Rezaie, H. R. ^{[1
]}

Ghahari, M. ^{[3
]}

Aminzare, M. ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Dept Mat & Met Engn, Tehran, Iran

[2] Islamic Azad Univ, North Tehran Branch, Young Researchers & Elites Club, Tehran, Iran

[3] Inst Color Sci & Technol, Nanomat & Nanocoatings Dept, Tehran 1668814811, Iran

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 01期

关键词：

Microwave synthesis; Nanocrystalline; Photocatalyst; ZnWO4; NANOCRYSTALLINE ZNWO4; OPTICAL-ABSORPTION; METAL TUNGSTATES; DEGRADATION; FABRICATION; SCINTILLATION; DEFECTS; FACILE;

D O I：

10.1016/j.ceramint.2014.09.119

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：

A novel cubic-shaped nanocrystalline ZnWO4 photocatalyst has been successfully synthesized at 250 C in a very short time by a microwave assisted precipitation technique using Na2WO4 center dot 2H(2)O and ZnCl2 as raw materials. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results indicated that obtained powder exhibited only wolframite structure with a cubic morphology. The direct optical band gap was estimated to be 3.74 eV by UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activity was investigated by the decomposition of aqueous Rhodamine B (RhB) under UV light irradiation. Cubic-shaped nanocrystalline ZnWO4 showed high photocatalytic activity and the degradation efficiency was 69% after 75 min. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1743 / 1747

页数：5