Effect of gold nanoparticles on the photocatalytic efficiency of ZnO films

被引：29
作者：
Georgiev, Peter [1 ]
Kaneva, Nina [2 ]
Bojinova, Assya [2 ]
Papazova, Karolina [2 ]
Mircheva, Kristina [1 ]
Balashev, Konstantin [1 ]
机构：
[1] Univ Sofia, Fac Chem & Pharm, Dept Phys Chem, Sofia 1164, Bulgaria
[2] Univ Sofia, Fac Chem & Pharm, Dept Gen & Inorgan Chem, Lab Nanoparticle Sci & Technol, Sofia 1164, Bulgaria
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2014年 / 460卷
关键词：
Gold nanoparticles; Zinc oxide; Thin films; Photocatalysis; Malachite green; AZO-DYE; AU-ZNO; TIO2; PLATINUM; CARBON; ENHANCEMENT; DEGRADATION; OXIDATION; SIZE; UV;
D O I：
10.1016/j.colsurfa.2014.02.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study presents a simple and inexpensive method for preparation of ZnO/Au thin film photocatalysts. Nanostructured ZnO and modified with gold nanoparticles zinc oxide films are obtained on glass substrate by dip-coating technique. The precursor suspension is prepared using commercial ZnO powder, ethanol and polyethyleneglycol, while the gold nanoparticles are obtained by classical citrate synthesis. Thin ZnO and ZnO/Au films are characterized by Atomic Force Microscopy (AFM), Scanning Electron Microscopy(SEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray diffraction and UV-Vis spectroscopy. The photocatalytic action of the samples is studied in respect to Malachite Green photodegradation under UV and visible light irradiation. The modified ZnO/Au films manifest higher photocatalytic efficiency under UV and visible light illumination in comparison to ZnO ones. A possible mechanism for explanation of the observed effect is proposed. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：240 / 247
页数：8
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