Characterization and Photocatalytic Activity of Enhanced Copper-Silica-Loaded Titania Prepared via HydrothermalMethod

Poliah, Ramarao and Sreekantan, Srimala (2011) Characterization and Photocatalytic Activity of Enhanced Copper-Silica-Loaded Titania Prepared via HydrothermalMethod. Journal of Nanomaterials, 2011 (239289). pp. 1-8. ISSN 1687-4110

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Abstract

TiO2 nanopowder, loaded with SiO2 and Cu-SiO2, was prepared under both acidic and basic environments via the hydrothermal method. The morphology and structure of TiO2 were studied by XRD, TEM, and FT-IR. The photocatalytic activity of samples was studied by monitoring the degradation of methyl orange, using a UV-visible spectrophotometer. The effect of Ti/Si ratio, pH, and Cu2+ addition on the formation of TiO2 and its photocatalytic activity was investigated in detail. The results show that a large surface area and a high surface acidity were important factors to achieve good TiO2 performance. The presence of Ti-O-Si bonding enhanced surface acidity, which improved its ability to adsorb more hydroxyl radicals and increased its surface area. The addition of 0.1mol% concentration of Cu2+ and 25mol% SiO2 in TiO2 induced the formation of new states close to the conduction band, which narrowed the band gap energy and enhanced the photodegradation efficiency.

Item Type:	Article
Subjects:	T Technology > TN Mining Engineering. Metallurgy > TN1-997 Mining engineering. Metallurgy
Divisions:	Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral (School of Material & Mineral Resource Engineering) > Article
Depositing User:	Mr Noorazilan Noordin
Date Deposited:	18 Jan 2018 08:16
Last Modified:	18 Jan 2018 08:16
URI:	http://eprints.usm.my/id/eprint/38430

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