Facile synthesis and enhanced visible-light photocatalytic activity of micro/nanostructured Ag2ZnGeO4 hollow spheres

被引：6
|
作者：
Liu, Jin [1 ,2 ]
Zhang, Gaoke [1 ]
机构：
[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China
[2] Zhoukou Normal Univ, Key Lab Rare Earth Funct Mat & Applicat, Zhoukou 466001, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2015年 / 193卷
基金：
中国国家自然科学基金;
关键词：
Ag2ZnGeO4; Hollow sphere; Visible-light; Photocatalytic; TEMPLATE-FREE SYNTHESIS; HYDROTHERMAL SYNTHESIS; ORGANIC POLLUTANTS; DYE DEGRADATION; TIO2; MICROSPHERES; WATER; DISINFECTION; SUSPENSIONS; REDUCTION;
D O I：
10.1016/j.mseb.2014.12.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Micro/nanostructured Ag2ZnGeO4 hollow spheres were successfully synthesized by a one-step and low-temperature route under ambient pressure. The micro/nanostructured Ag2ZnGeO4 hollow spheres have a diameter of 1-2 pm and their shells are composed of numerous nanoparticles and nanorods. The growth process of the micro/nanostructured Ag2ZnGeO4 hollow spheres was investigated in detail. The results indicated that the morphologies and composition of Ag2ZnGeO4 samples were strongly dependent on the dose of the AgNO3 and reaction time. Excessive AgNO3 was favorable for the nucleation and growth rate of Ag2ZnGeO4 crystals and the formation of pure Ag2ZnGeO4. Moreover, the formation mechanism of the micro/nanostructured Ag2ZnGeO4 hollow spheres is related to the Ostwald ripening. Under the same conditions, the photocatalytic activity of micro/nanostructured Ag2ZnGeO4 hollow spheres is about 1.7 times and 11 times higher than that of bulk Ag2ZnGeO4 and Degussa P25, respectively. These interesting findings could provide new insight on the synthesis of micro/nanostructured ternary-metal oxides with enhanced photocatalytic activity. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：198 / 205
页数：8
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