ICCAS OpenIR
Photo-sensitized Degradation of Dye Pollutants on Amorphous TiO2 under Visible Light Irradiation
Wang Qi1; Zhao Jincai2; Cong Yanqing1; Zhang Yi1
2011-06-01
Source PublicationCHINESE JOURNAL OF CATALYSIS
ISSN0253-9837
Volume32Issue:6Pages:1076-1082
AbstractAmorphous TiO2 (Am-TiO2) was prepared via a simple step through hydrolysis. The as-prepared Am-TiO2 was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-visible diffuse reflectance spectroscopy, and N-2 adsorption-desorption. Large surface area (216 m(2)/g) and abundant surface hydroxyl group/chemical adsorbed water were observed on Am-TiO2. Compared with crystallized TiO2, the adsorption edge of Am-TiO2 exhibited a blue shift (from 411 to 378 nm). Rapid photo-sensitized degradation of rhodamine B (RhB) was achieved on Am-TiO2 under visible light (lambda > 420 nm) irradiation. The pseudo-first-order rate constant (k = 0.0325 min(-1)) was 6.5 and 5.2 times that of anatase and TiO2 P25, respectively. Moreover, both the N-deethylation and cleavage of chromophore ring structure of RhB were observed on Am-TiO2 while only the latter path predominated on crystallized TiO2. The difference between cleavage of chromophore ring structure and N-deethylation was ascribed to different anchoring groups of RhB on TiO2 through -COOH and -N+Et2, respectively. Testing in 4 recycle experiments, the degradation rate of RhB did not change significantly, indicating the excellent stability and reusability of the Am-TiO2 photocatalyst.
KeywordAmorphous Titanium Dioxide Rhodamine b Photocatalytic Visible Light
DOI10.3724/SP.J.1088.2011.10336
Indexed BySCI
Language英语
WOS IDWOS:000292429000028
PublisherSCIENCE PRESS
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71848
Collection中国科学院化学研究所
Corresponding AuthorWang Qi
Affiliation1.Zhejiang Gongshang Univ, Sch Environm Sci & Engn, Hangzhou 310018, Zhejiang, Peoples R China
2.Chinese Acad Sci, Inst Chem, Being Natl Lab Mol Sci, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang Qi,Zhao Jincai,Cong Yanqing,et al. Photo-sensitized Degradation of Dye Pollutants on Amorphous TiO2 under Visible Light Irradiation[J]. CHINESE JOURNAL OF CATALYSIS,2011,32(6):1076-1082.
APA Wang Qi,Zhao Jincai,Cong Yanqing,&Zhang Yi.(2011).Photo-sensitized Degradation of Dye Pollutants on Amorphous TiO2 under Visible Light Irradiation.CHINESE JOURNAL OF CATALYSIS,32(6),1076-1082.
MLA Wang Qi,et al."Photo-sensitized Degradation of Dye Pollutants on Amorphous TiO2 under Visible Light Irradiation".CHINESE JOURNAL OF CATALYSIS 32.6(2011):1076-1082.
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