Insights into the mechanism of phenolic mixture degradation by catalytic ozonation with a mesoporous Fe3O4/MnO2 composite
Nawaz, Faheem1,2; Xie, Yongbing1; Xiao, Jiadong1,2; Cao, Hongbin1; Li, Yuping1; Zhang, Di1
2016
发表期刊RSC ADVANCES
ISSN2046-2069
卷号6期号:35页码:29674-29684
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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c6ra03167f
收录类别SCI
语种英语
关键词[WOS]SUPPORTED MANGANESE OXIDES ; AQUEOUS-SOLUTION ; WASTE-WATER ; OXIDATION ; NANOPARTICLES ; PERFORMANCE ; CARBON ; OZONE ; NITROBENZENE ; PHOTOCATALYSIS
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National Natural Science Foundation of China(21207133) ; National Science Fund for Distinguished Young Scholars of China(51425405)
WOS记录号WOS:000373029500080
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/20988
专题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
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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.
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