Photocatalytic activity of AgI sensitized ZnO nanoparticles under visible light irradiation

被引：97
作者：
Vignesh, K. [1 ]
Suganthi, A. [1 ]
Rajarajan, M. [2 ]
Sara, S. A. [1 ]
机构：
[1] Thiagarajar Coll, PG & Res Dept Chem, Madurai 625009, Tamil Nadu, India
[2] CPA Coll, Dept Chem, Bodinayakanur 626513, Tamil Nadu, India
来源：
POWDER TECHNOLOGY | 2012年 / 224卷
关键词：
AgI-ZnO nanoparticles; Rosaniline; Photocatalysis; Visible light; ACTIVATED CARBON; PATHOGENIC BACTERIA; AQUEOUS SUSPENSIONS; DEGRADATION; PHOTODEGRADATION; DESTRUCTION; ADSORPTION; EFFICIENT; AGI/TIO2; WATER;
D O I：
10.1016/j.powtec.2012.03.015
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Nanoparticles of zinc oxide (ZnO) sensitized with silver iodide (AgI) were synthesized by a chemical precipitation method and were found to be a visible light driven photocatalyst. The characterization of prepared photocatalyst was studied using UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), X-ray powder diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). Average crystallite size determined by XRD was 21.56 nm for ZnO and 23.44 nm for AgI sensitized ZnO (AgI-ZnO). The photocatalytic efficiency of AgI-ZnO was evaluated by the decolorization of rosaniline hydrochloride dye (RA) under visible light irradiation. The influence of various operational parameters such as the effect of pH, catalyst dosage and initial dye concentration on the photodecolorization was investigated in detail. The removal percentage of chemical oxygen demand (COD) and total organic carbon (TOC) was determined to evaluate the mineralization of RA during photodecolorization. Maximum decolorization, COD removal and total organic carbon (TOC) reduction were 88%, 75% and 68% respectively, under the optimum conditions. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：331 / 337
页数：7
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