期刊
WATER SCIENCE AND TECHNOLOGY
卷 65, 期 11, 页码 1923-1928出版社
IWA PUBLISHING
DOI: 10.2166/wst.2012.091
关键词
Direct Blue 71; Fe:ZnO nanomaterials; mild hydrothermal; solar degradation; surface modifier
资金
- Kurdistan University of Medical Sciences, Kurdistan, Iran
This paper reports photodegradation of Direct Blue 71 under irradiation by sunlight. We synthesized Fe:ZnO nanomaterials under mild hydrothermal conditions (P = autogenous, T = 100 degrees C, t = 18 h). The precursors were Fe2O3. as dopant, n-butylamine as surface modifier, NaOH as mineralizer and reagent grade ZnO. The systematic experiments on the photodegradation of Direct Blue 71 were carried out by changing different effective parameters. The variables in this study were type of nanomaterials synthesized (4 types), nanomaterial dosage (0.4-1.0 g/L), contact time (30-120 min), pH (3-11), and dye concentration (20-100 ppm). The photodegradation efficiency was determined using a UV-Vis spectrophotometer. Determination of total organic carbon (TOC) amount was used to find out mineralization efficiency. Our experimental results revealed that the nanomaterials synthesized had higher efficiency compared with the reagent grade ZnO. The best efficiency was achieved at the following conditions: 1.0 g/L nanomaterials loading, 120 min contact time, pH 5, and photodegradation efficiency from more than 75 up to 99% depending upon the dye concentration.
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