标题：Effects of operational parameters on the photodegradation of 2,4-dinitrophenol in TiO2 dispersion作者：Mao, Lu; Shen, Jiaojun; Ma, Xiaoliang; Lan, Zhonghui; Zhang, Xu

来源出版物：DESALINATION AND WATER TREATMENT 卷：56 期：3页：744-751 DOI：10.1080/19443994.2014.937754 出版年：OCT 16 2015

摘要：Photocatalytic degradation of 2,4- dinitrophenol in two commercial TiO2 ( Degussa P25 and Hombikat UV- 100) was investigated in this work. The properties of two TiO2 were systematically studied and described in detail. The observed photoactivity of Degussa P25 was 6- 12 times higher than Hombikat UV- 100 although the specific surface area of Hombikat UV- 100 was 5.7 times more than that of Degussa P25. The photodegradation of 2,4- dinitrophenol was favored at neutral pH in Degussa P25, while its degradation was preferred at pH 3.0 in Hombikat UV- 100 dispersion. The observed kinetic constant ( kobs) for the photodegradation of 2,4- dinitrophenol in 20 mg/ L humic acid solution was found to be 15% ( Degussa P25) and 21% ( Hombikat UV- 100) of the values obtained from the corresponding pure aquatic solutions. The suppression effects of beta cyclodextrin on the photodegradation of 2,4- dinitrophenol over Degussa P25 ( 50%) was much more significant than that of Hombikat UV- 100 because of the different adsorption behavior of a- cyclodextrin over two TiO2. Hydroxyl radical and valance band hole was found to be the predominant reactant during the degradation of 2,4- dinitrophenol using P25 and UV- 100, respectively. Formic acid, acetic acid, oxalic acid, and NO - 3 were detected as advanced oxidation products.

入藏号：WOS:000361994300019

文献类型：Article

语种：English

作者关键词：2, 4-Dinitrophenol, TiO2, Humic acid, Cyclodextrin, Photocatalytic degradation

扩展关键词：HETEROGENEOUS PHOTOCATALYTIC DEGRADATION; PERFORMANCE LIQUID-CHROMATOGRAPHY; TITANIUM-DIOXIDE; P-NITROPHENOL; 4-NITROPHENOL; 2-NITROPHENOL; SUSPENSIONS; PHENOLS; WATER; MECHANISM

通讯作者地址：Zhang, Xu; Wuhan Univ, Sch Resources & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

电子邮件地址：312603022@qq.com; 786572688@qq.com; 1056149167@qq.com; 1354425356@qq.com; xuzhangwhu@gmail.com

地址： [Mao, Lu; Shen, Jiaojun; Ma, Xiaoliang; Lan, Zhonghui; Zhang, Xu] Wuhan Univ, Sch Resources & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430079, Peoples R China.

研究方向：Engineering; Water Resources

ISSN：1944-3994

eISSN：1944-3986

影响因子（2014）：1.173