The Influence of Morphology on Photo-catalytic Activity and Optical Properties of Nanocrystalline ZnO Powder

被引：0
作者：
Javad Moghaddam [1 ]
Sara Mollaesmail [1 ]
Saeed Karimi [2 ]
机构：
[1] Materials and Metallurgical Engineering Department, Advanced Materials Research Center, Sahand University of Technology
[2] School of Metallurgy and Materials Engineering, University of Tehran
来源：
Nano-Micro Letters | 2012年 / 04期
关键词：
Nano-particles; ZnO; Precipitation method; Optical properties; Photocatalytic activity;
D O I：
暂无
中图分类号：
TQ132.41 []; O643.36 [催化剂];
学科分类号：
0817 ; 081705 ;
摘要：
ZnO nano-particles were synthesized via an ammonical ammonium carbonate solution by precipitation method in presence of some additives such as urea, oleic and stearic acid. The morphology and crystallinity of the obtained zinc oxide particles depend critically on the type of additive which was used. Additives also affected the crystal orientation of precipitate nano-particles. SEM, XRD, BET and UV-visible were used to characterize morphology, microstructure, specific surface area and optical properties of the products.Photo-catalysis properties of the as-prepared ZnO powders were evaluated by degradation of methyl red(acid red) in aqueous solution exposed to UV-light. Results suggested a close relationship among the morphology,size and surface area on photo-catalysis and optical properties of the particles. The widest Egvalue(3.56 e V),highest degradation and decolorization efficiency(99%) were obtained from a sample with the smallest grain size(largest surface area) which were used urea as an additive.
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页码：197 / 201
页数：5
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