Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 211, Issue -, Pages 182-187Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.07.116
Keywords
Acid orange 7; Photocatalysis; Titania; Mesoporous; Adsorption
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Funding
- EPSRC [EP/I003800/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I003800/1] Funding Source: researchfish
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A series of mesoporous films of titania of different thicknesses are prepared and their surface areas and porosities determined by physical adsorption using Kr as the adsorbate. The amounts of acid orange 7 (AO7) adsorbed by these films are found to be proportional to their measured surface areas and so the possibility of using this as a method of determining the surface area of thin titania films is discussed. The initial rates of UV-driven photocatalytic- and visible-driven photosensitised-bleaching of AO7 in solution, upon UVA and visible light irradiation, respectively, are also directly dependent upon the measured surface areas of the titania films. The quantum efficiencies for the UV photocatalytic- and visible photosensitised-bleaching of AO7 by the thickest of the AO7 films were estimated to be 0.08 and 0.01%. respectively. (c) 2011 Elsevier B.V. All rights reserved.
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