Cited by 194TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesAdvanced oxidation water treatment

Enhanced Photocatalytic Degradation of Dye Pollutants under Visible Irradiation on Al(III)-Modified TiO2: Structure, Interaction, and Interfacial Electron Transfer

Zhao, Dan, Chen, Chuncheng, Wang, Yifeng, Ma, Wanhong, Zhao, Jincai, Rajh, Tijana, Zang, Ling·2008·Environmental Science & Technology

Abstract

Aluminum(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, 27Al 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 FTIR 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(III)-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.

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Crossref · 10.1021/es071770e

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Authors
Zhao, D., Chen, C., Wang, Y., Ma, W., Zhao, J., Rajh, T., & Zang, L.
Affiliations
Southern Illinois University Carbondale (US)
Corresponding author
  • Chen, Chuncheng
  • Zhao, Jincai
Venue
Environmental Science & Technology
Published
2007-11-27
Volume
42
Issue
1
Pages
308-314
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2015655416
Cited by
194
References
45
Citations by year
2026: 4 · 2025: 4 · 2024: 7 · 2023: 7 · 2022: 5 · 2021: 12 · 2020: 15 · 2019: 9 · 2018: 11 · 2017: 8 · 2016: 13 · 2015: 15 · 2014: 11 · 2013: 21 · 2012: 18
FWCI
4.83
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • Chinese Academy of Sciences
  • Ministry of Science and Technology of the People's Republic of China
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
Keywords
photocatalytic degradation, dye pollutants, visible light photocatalysis, rhodamine B, interfacial electron transfer, dye adsorption, dye degradation mechanism
MeSH terms
Aluminum, Catalysis, Coloring Agents, Light, Oxidation-Reduction, Photochemistry, Titanium, Water Pollutants, Chemical, Water Purification

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