Microwave-enhanced catalytic degradation of 4-chlorophenol over nickel oxides

被引：54

作者：

Lai, Teh-Long ^{[1
,2
]}

Lee, Chia-Chan ^{[2
]}

Huang, Gim-Lin ^{[1
]}

Shu, Youn-Yuen ^{[1
]}

Wang, Chen-Bin ^{[2
]}

机构：

[1] Natl Kaohsiung Normal Univ, Dept Chem, Environm Anal Lab, Kaohsiung 802, Taiwan

[2] Natl Def Univ, Chung Cheng Inst Technol, Dept Appl Chem, Tao Yuan 33509, Taiwan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 78卷 / 1-2期

关键词：

nickel oxide; microwave; degradation of 4-chlorophenol;

D O I：

10.1016/j.apcatb.2007.09.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A mix-valenced nickel oxide was obtained from nickel nitrate aqueous solution through a precipitation with sodium hydroxide and an oxidation by sodium hypochlorite. Furthermore, the oxide was heated under microwave-assisted to fabricate a high-active mix-valenced nickel oxide (assigned as NiOx). Pure nickel oxide was obtained from the NiOx by calcination at 300, 400 and 500 degrees C (labeled as C300, C400 and C500, respectively). They were characterized by thermogravimetry (TG), X-ray diffraction (XRD), infrared spectroscopy (IR), temperature-programmed reduction (TPR), nitrogen adsorption at 196 degrees C and scanning electron microscopy (SEM). Their catalytic activities towards the degradation of 4-chlorophenol 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-enhanced catalytic degradation (MECD) of 4-chlorophenol have been investigated. The results showed that the 4-chlorophenol had degraded completely into harmless products (CO2 center dot H2O and mineral acids) within 5 min of investigation, under pH 7 and T = 70 degrees C over the fabricated NiOx. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：151 / 157

页数：7

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