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题名: Kinetic study on the photo-catalytic degradation of pyridine in TiO2 suspension systems
作者: Zhao, H;  Xu, SH;  Zhong, JB;  Bao, XH
关键词: TiO2 ;  pyridine ;  kinetics ;  photo-degradation
刊名: CATALYSIS TODAY
发表日期: 2004-09-01
DOI: 10.1016/j.cattod.2004.06.086
卷: 93-5, 页:857-861
收录类别: ISTP ;  SCI
文章类型: Article
项目归属: 502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: It has been generally agreed that pyridine can be effectively mineralized in aerated TiO2 slurries using near-UV irradiation. The knowledge on the kinetics of the system possesses both practical and theoretical values. The present study, on the base of Langmuir-Hinshewood mechanism, illustrates a pseudo first-order kinetic model of the degradation with the limiting rate constant of 3.004 mg l(-1) min(-1) and equilibrium adsorption constant 2.763 x 10(-2) l mg(-1), respectively. The degradation efficiency in alkali is a little higher than that in acid with a minimum at about pH = 5, which is explained by the formation of acid-pyridine in acidic surrounding together with the amphoteric nature of the TiO2 surface. The promotion of H2O2 on the photo-degradation ties in its supplying proper amount of (OH)-O-. radicals for the inducement stage before surface redox reactions. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: PHOTOCATALYTIC DEGRADATION ;  THERMAL-DECOMPOSITION ;  WATER ;  POLLUTANTS ;  QUINOLINE ;  OXIDATION ;  PRODUCTS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000223973200123
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82071
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Inst Railway Technol, Dalian 116028, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhao, H,Xu, SH,Zhong, JB,et al. Kinetic study on the photo-catalytic degradation of pyridine in TiO2 suspension systems[J]. CATALYSIS TODAY,2004,93-5:857-861.
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