Optimization of preparation conditions of ZnO-SiO2 xerogel by sol-gel technique for photodegradation of methylene blue dye

被引：23
|
作者：
Mohamed, R. M. [1 ,2 ]
Baeissa, E. S. [1 ]
Mkhalid, I. A. [1 ]
Al-Rayyani, M. A. [1 ]
机构：
[1] King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah, Saudi Arabia
[2] CMRDI, Adv Mat Dept, Cairo, Egypt
来源：
APPLIED NANOSCIENCE | 2013年 / 3卷 / 01期
关键词：
Sol-gel; Nanoparticles; ZnO-SiO2; Photocatalysis; Methylene blue dye; PHOTOCATALYTIC DEGRADATION; ZNO; TIO2/SIO2; CATALYSTS; SILICA; FILMS; WATER;
D O I：
10.1007/s13204-012-0074-z
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The ZnO-SiO2 xerogel photocatalyst was prepared via the sol-gel technique and applied for photodegradation of methylene blue (MB) dye. The optimum conditions for preparation of ZnO-SiO2 gel is 30:70 ZnO:SiO2 molar ratio and TEOS:C2H5OH:H2O:HNO3 is 1:16:12:0.04 molar ratios at 30 degrees C for 30 min, at these conditions the photoactivity of ZnO-SiO2 xerogel was 99% at a surface area of 500 m(2)/g after 60 min. The optimum loading of ZnO-SiO2 photocatalyst was 0.050 wt% that gives 99% MB dye removal efficiency after 40 min. The overall kinetics of photodegradation of MB dye using ZnO-SiO2 photocatalyst was found to be of the first order.
引用
收藏
页码：57 / 63
页数：7
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