Journal
SURFACE & COATINGS TECHNOLOGY
Volume 258, Issue -, Pages 672-676Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2014.08.019
Keywords
BiOI; TiO2; Heterojunction; Self-cleaning; Photocatalysis
Funding
- Natural Science Foundation of Hubei Province of China [2012FFB01104]
- National Natural Science Foundation of China [51408204, 61361009]
- Hubei University for Nationalities [MY2013T003]
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To endow cotton fabrics with self-cleaning property, TiO2 films were coated on the cotton fabrics by means of sol-gel method, and then BiOI nanosheets were loaded on the surface of TiO2 films by a chemical bath deposition method. The as-prepared BiOI/TiO2-cotton samples were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy. The photocatalytic activity and stability of the BiOI/TiO2-cotton samples toward degradation of methyl orange (MO) solutions were evaluated. In comparison with TiO2-cotton, the dramatic enhancement in the photocatalytic performance of the BiOI/TiO2-cotton could be attributed to strong visible-light absorption of BiOI photocatalysts and the formation of a p-BiOI/n-TiO2 heterojunction. Meanwhile, the photocatalytic performances of BiOI/TiO2-cotton were maintained for the cycling experiments, indicating that BiOI/TiO2-cotton could be used as stable and efficient self-cleaning materials. (C) 2014 Elsevier B.V. All rights reserved.
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