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Enhanced photocatalytic degradation of dye pollutants under visible irradiation on Al(III)-modified TiO2: Structure, interaction, and interfacial electron transfer
Zhao, Dan1; Chen, Chuncheng1; Wang, Yifeng1; Ma, Wanhong1; Zhao, Jincai1; Rajh, Tijana2; Zang, Ling3
2008
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume42Issue:1Pages:308-314
AbstractAluminum(III)-modified TiO2 was prepared by sol-gel process via a sudden gelating method. The structure of the modified material and the local environment of aluminum were investigated using X-ray diffraction, HRTEM, XpS, (27)AI MAS NMR, and xi-potential measurements. The effect of the aluminum modification on interaction between the dye and photocatalyst, the interfacial electron transfer process, and thereby the degradation of dye pollutants under visible irradiation were also examined by FIR spectra and UV-vis diffuse reflectance spectra. It was found that, rather than incorporating into the crystal lattice of TiO2, the aluminum forms an overlayer of Al2O3 on the surface of TiO2, interfaced with Ti-O-Al bonds. It is interesting that the carboxylate-containing dyes such as Rhodamine B (RhB) adsorb preferentially on the Al2O3, rather than the Ti(IV) sites on the surface of TiO2. The photodegradation rate observed for RhB is nearly 5-fold faster than that obtained in the pristine TiO2 system. The photodegradation of dyes on the aluminum(Ill)-modified photocatalyst is of great dependence on the structure and anchoring group of the dyes. Structure with carboxylate as anchoring group and amino group as electron donor is favorable for degradation. The mechanistic details are discussed on the basis of experimental results.
DOI10.1021/es071770e
Indexed BySCI
Language英语
WOS IDWOS:000252037400050
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:141[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63204
Collection中国科学院化学研究所
Corresponding AuthorChen, Chuncheng
Affiliation1.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
2.Argonne Natl Lab, Div Mat Sci, Div Chem, Argonne, IL 60439 USA
3.So Illinois Univ, Dept Chem & Biochem, Carbondale, IL 62901 USA
Recommended Citation
GB/T 7714
Zhao, Dan,Chen, Chuncheng,Wang, Yifeng,et al. Enhanced photocatalytic degradation of dye pollutants under visible irradiation on Al(III)-modified TiO2: Structure, interaction, and interfacial electron transfer[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2008,42(1):308-314.
APA Zhao, Dan.,Chen, Chuncheng.,Wang, Yifeng.,Ma, Wanhong.,Zhao, Jincai.,...&Zang, Ling.(2008).Enhanced photocatalytic degradation of dye pollutants under visible irradiation on Al(III)-modified TiO2: Structure, interaction, and interfacial electron transfer.ENVIRONMENTAL SCIENCE & TECHNOLOGY,42(1),308-314.
MLA Zhao, Dan,et al."Enhanced photocatalytic degradation of dye pollutants under visible irradiation on Al(III)-modified TiO2: Structure, interaction, and interfacial electron transfer".ENVIRONMENTAL SCIENCE & TECHNOLOGY 42.1(2008):308-314.
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