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Synthesis, morphology, optical and photocatalytic performance of nanostructured beta-Ga2O3

Girija, K and Thirumalairajan, S and Avadhani, GS and Mahgalaraj, D and Ponpandian, N and Viswanathan, C (2013) Synthesis, morphology, optical and photocatalytic performance of nanostructured beta-Ga2O3. In: Materials Research Bulletin, 48 (6). pp. 2296-2303.

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Official URL: http://dx.doi.org/10.1016/j.materresbull.2013.02.0...


Fine powders of beta-Ga2O3 nanostructures were prepared via low temperature reflux condensation method by varying the pH value without using any surfactant. The pH value of reaction mixture had great influence on the morphology of final products. High crystalline single phase beta-Ga2O3 nanostructures were obtained by thermal treatment at 900 degrees C which was confirmed by X-ray diffraction and Raman spectroscopy. The morphological analysis revealed rod like nanostructures at lower and higher pH values of 6 and 10, while spindle like structures were obtained at pH = 8. The phase purity and presence of vibrational bands were identified using Fourier transform infrared spectroscopy. The optical absorbance spectrum showed intense absorption features in the UV spectral region. A broad blue emission peak centered at 441 nm due to donor-acceptor gallium-oxygen vacancy pair recombination appeared. The photocatalytic activity toward Rhodamine B under visible light irradiation was higher for nanorods at pH 10.

Item Type: Journal Article
Publication: Materials Research Bulletin
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Nanostructures; Oxides; Chemical Synthesis; Electron Microscopy; Catalytic Properties
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 21 Jun 2013 05:03
Last Modified: 21 Jun 2013 05:03
URI: http://eprints.iisc.ac.in/id/eprint/46716

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