Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene
	Miao, Xue; Lu, Huijie; Li, Qianqian; Su, Guijin; Zheng, Minghui; Zhao, Yuyang; Liu, Yalu; Huang, Xinchen; Zhao, Yanhui
刊名	ENVIRONMENTAL SCIENCE-NANO
	2017-11-01
卷号	4 期号:5 页码:994-1004
英文摘要	Three crystalline forms of Al2O3 featuring rod-like fibers are synthesized, to perform the gaseous degradation of 1-chloronaphthalene (CN-1), a model compound. The degradation efficiency (DE) decreases as follows: micro/nano-gamma-Al2O3 > micro/nano-eta-Al2O3 > regular alpha-Al2O3. The high DE of 92.2% attained over gamma-Al2O3 is attributed to its specific defective spinel structure, resulting in its large surface area and pore volume, large amounts of surface-adsorbed oxygen species, and Bronsted and Lewis acid sites. The degradation products, naphthalene and 1,4/1,6-dichloronaphthalene (DiCN), with yield ratios of 7.3-13.3, are detected, indicating the occurrence of hydrodechlorination and side chlorination reactions. 1,6-DiCN is believed to be the most favored DiCN isomer product based on the calculated Delta H-r and Delta G(r). However, the percentage values of intermediates formed via these two reactions, in the degradation of CN-1, are 9.1%, 4.5% and 4.4%, over alpha-, eta- and gamma-Al2O3, respectively. The oxidative degradation pathway possibly dominantly occurs especially over micro/nano-gamma-Al2O3 with oxidative species such as O-2(-), O- and O2-, following the Mars-van Krevelen mechanism. Oxidation intermediates containing -CH2-, -CH3, and C-O groups are produced, which can be subsequently oxidized to low-molecular-weight products, such as formic, acetic and propanoic acids, and eventually completely oxidized to CO2.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39427]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Miao, Xue,Lu, Huijie,Li, Qianqian,et al. Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene[J]. ENVIRONMENTAL SCIENCE-NANO,2017,4(5):994-1004.
APA	Miao, Xue.,Lu, Huijie.,Li, Qianqian.,Su, Guijin.,Zheng, Minghui.,...&Zhao, Yanhui.(2017).Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene.ENVIRONMENTAL SCIENCE-NANO,4(5),994-1004.
MLA	Miao, Xue,et al."Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene".ENVIRONMENTAL SCIENCE-NANO 4.5(2017):994-1004.