期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 9, 期 -, 页码 S1858-S1868出版社
ELSEVIER
DOI: 10.1016/j.arabjc.2012.05.006
关键词
Photocatalytic degradation; 4-Nitrophenol; Solar-irradiation; Catalyst loading; Electron acceptors
资金
- UGC, New Delhi, India
The photocatalytic degradation of 4-nitrophenol over irradiated ZnO suspensions was investigated in aerated aqueous solution. Complete degradation was achieved after irradiation with solar light, being the reaction rate dependent on the initial pH. The effect of various parameters such as catalyst loading, pH and initial concentration of 4-nitrophenol on degradation has been determined. The degradation was strongly enhanced in the presence of electron acceptors such as H2O2, K2S2O8 and KBrO3. The kinetics of heterogeneous photocatalytic degradation is discussed interms of Langmuir-Hinshelwood (L-H) kinetic model. The intermediates formed during the photodegradation were identified by GC-MS analysis. The mineralization of 4-nitrophenol has also been confirmed by COD measurements. (C) 2012 Production and hosting by Elsevier B.V. on behalf of King Saud University.
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