Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite

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	Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite
	Nawaz, Faheem 1,2; Xie, Yongbing 1; Xiao, Jiadong 1,2; Cao, Hongbin 1; Li, Yuping 1; Zhang, Di 1
刊名	RSC ADVANCES
	2016
卷号	6 期号:35 页码:29674-29684
ISSN号	2046-2069
英文摘要	A mesoporous Fe-3/MnO2 composite was fabricated by a co-precipitation method in this paper, and it showed a much higher activity than Fe3O4 and MnO2 in the catalytic ozonation of a p-cresol and p-chlorophenol mixture. The physicochemical properties of Fe3O4 and MnO2 and Fe3O4/MnO2 were compared using XRD, SEM, TEM and N-2 physical adsorption/desorption. pH had a significant effect on the degradation rate of the phenols and catalyst stability, and the degradation order of p-cresol and p-chlorophenol also varied in different mediums. pH 9 was found to be the optimal condition both for catalytic activity and metal leaching. Attenuated total reflection Fourier transform infrared spectra confirmed that ozone replaced chemically adsorbed water on the Fe3O4/MnO2 surface and evolved into reactive radicals. Electron spin resonance and quenching experiments with different scavengers were conducted to reveal that the hydroxyl radicals were mainly responsible for the phenolic mixture degradation at pH 9, along with a little contribution of singlet oxygen and molecular ozone. A detailed mineralization pathway of the phenolic mixture was also proposed according to the gas chromatography-mass spectrometry results.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	SUPPORTED MANGANESE OXIDES ; AQUEOUS-SOLUTION ; WASTE-WATER ; OXIDATION ; NANOPARTICLES ; PERFORMANCE ; CARBON ; OZONE ; NITROBENZENE ; PHOTOCATALYSIS
收录类别	SCI
语种	英语
WOS记录号	WOS:000373029500080
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20988]
专题	过程工程研究所_湿法冶金清洁生产技术国家工程实验室
作者单位	1.Chinese Acad Sci, Beijing Engn Res Ctr Proc Pollut Control, Inst Proc Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Nawaz, Faheem,Xie, Yongbing,Xiao, Jiadong,et al. Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite[J]. RSC ADVANCES,2016,6(35):29674-29684.
APA	Nawaz, Faheem,Xie, Yongbing,Xiao, Jiadong,Cao, Hongbin,Li, Yuping,&Zhang, Di.(2016).Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite.RSC ADVANCES,6(35),29674-29684.
MLA	Nawaz, Faheem,et al."Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite".RSC ADVANCES 6.35(2016):29674-29684.