Qamar, M. ; Ganguli, Ashok K. (2013) Self-assembling behaviour of Pt nanoparticles onto surface of TiO2 and their resulting photocatalytic activity Bulletin of Materials Science, 36 (6). pp. 945-1132. ISSN 0250-4707
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Official URL: http://www.ias.ac.in/listing/articles/boms/036/06
Abstract
In the present study, self-assembling behaviour of guest nanoparticles (platinum) onto the surface of host support (titanium dioxide) during photodeposition process as a function of solution pH has been explored in detail by means of transmission electron microscope (TEM). The photocatalytic activity of the resulting bimetallic nanoassembly (Pt/TiO2) was evaluated by studying the degradation of two organic pollutants viz. triclopyr and methyl orange. Microscopic studies revealed that the deposition and/or distribution of Pt nanoparticles onto the surface of TiO2 were strongly guided by the ionization state of support which in turn was regulated by the solution pH of photodeposition process. A direct relationship between the solution pH of deposition process and the photocatalytic activity of resulting bimetallic catalyst has been observed. A mechanism based on the interparticle interaction between TiO2 and hydrolytic products of metal ions has been proposed for the differences in the photocatalytic activity of the resulting nanocomposite.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | TiO2; Sol–Gel Synthesis; Photocatalysis; Photodeposition; Photocatalytic Activity |
ID Code: | 111735 |
Deposited On: | 28 Sep 2017 12:22 |
Last Modified: | 28 Sep 2017 12:22 |
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