Microwave-assisted combustion synthesis of Ag/ZnO nanocomposites and their photocatalytic activities under ultraviolet and visible-light irradiation

被引：0

作者：

Zhang, Dafeng ^{[1
]}

Pu, Xipeng ^{[1
]}

Li, Huaiyong ^{[1
]}

Yu, Young Moon ^{[2
]}

Shim, Jae Jeong ^{[3
]}

Cai, Peiqing ^{[3
]}

Kim, Sun Il ^{[3
]}

Seo, Hyo Jin ^{[3
]}

机构：

[1] School of Materials Science and Engineering, Liaocheng University, Liaocheng, Shandong,252000, China

[2] LED-Marin Convergence Technology RandBD Center, Pukyong National University, Busan,608-739, Korea, Republic of

[3] Dept. of Physics and Interdisciplinary Program of Biomedical, Mechanical and Electrical Engineering, Pukyong National University, Busan,608-737, Korea, Republic of

来源：

Materials Research Bulletin | 2015年 / 61卷

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

Combustion synthesis - Irradiation - Metal nanoparticles - Microwave irradiation - Photocatalysis - Scanning electron microscopy - Silver nanoparticles - X ray photoelectron spectroscopy - High resolution transmission electron microscopy - Light - Energy gap - II-VI semiconductors - Zinc oxide - X ray diffraction - Nanocomposites - Photoluminescence;

D O I：

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学科分类号：

摘要：

Ag/ZnO nanocomposites were synthesized by a rapid one-step microwave-assisted combustion method. The as-synthesized samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence and ultraviolet-visible spectrophotometry. XRD results showed that hexagonal ZnO and cubic Ag were obtained. Ag nanoparticles were chemically attached on the surface of ZnO. The decrease in the energy band gap of Ag/ZnO nanocomposites and the photoluminescence quenching were observed while the Ag content was increased. Furthermore, the introduction of Ag nanoparticles leads to significantly improved photocatalytic activities in the case of ultraviolet irradiation, but in the case of visible-light irradiation opposite results were obtained. The corresponding mechanism was discussed in detail. © 2014 Elsevier Ltd. All rights reserved.

引用

页码：321 / 325