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Microwave-enhanced catalytic degradation of phenol over nickel oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
48924 46528 2006 7 PDF Available
Title
Microwave-enhanced catalytic degradation of phenol over nickel oxide
Abstract

A mix-valenced nickel oxide, NiOx, was prepared from nickel nitrate aqueous solution through a precipitation with sodium hydroxide and an oxidation by sodium hypochlorite. Further, pure nickel oxide was obtained from the NiOx by calcination at 300, 400 and 500 °C (labeled as C300, C400 and C500, respectively). They were characterized by thermogravimetry (TG), X-ray diffraction (XRD), nitrogen adsorption at −196 °C and temperature-programmed reduction (TPR). Their catalytic activities towards the degradation of phenol were further studied under continuous bubbling of air through the liquid phase. Also, the effects of pH, temperature and kinds of nickel oxide on the efficiency of the microwave-enhance catalytic degradation (MECD) of phenol have been investigated. The results indicated that the relative activity affected significantly with the oxidation state of nickel, surface area and surface acidity of nickel oxide, i.e., NiOx (>+2 and SBET = 201 m2 g−1) ≫ C300 (+2 and SBET = 104 m2 g−1) > C400 (+2 and SBET = 52 m2 g−1) > C500 (+2 and SBET = 27 m2 g−1). The introduction of microwave irradiation could greatly shorten the time of phenol degradation.

Keywords
Nickel oxide; Microwave; Degradation of phenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 68, Issues 3–4, 7 November 2006, Pages 147–153
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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