Buried-Layer Bared AZO/TiO2 Semiconductor Coupled Films and their Photocatalytic Properties

Xi Wen Zhang; Cen Cen Liu; Gao Rong Han

doi:10.4028/www.scientific.net/MSF.620-622.707

Paper Titles

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Preparation of TiO₂ Thin Films and its Superhydrophilic Properties
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Light Conversion by Size Control of Inorganic Phosphors
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Properties Predicting of Transition Metal-Doped Anatase TiO₂
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Buried-Layer Bared AZO/TiO₂ Semiconductor Coupled Films and their Photocatalytic Properties
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Effects of Electrical Discharge Energy on Machining Performance of Sintered NdFeB Magnet
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Development of Porous Material with High Young’s Modulus and Low Thermal Expansion Coefficient in SiC-Vitrified Bonding Material-LiAlSiO₄ System
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Viscoelastic Analysis on High Temperature’s Stability of Asphalt Pavement
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Preparation of Superfine Molybdenum Powder by Reduction Process
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HomeMaterials Science ForumMaterials Science Forum Vols. 620-622Buried-Layer Bared AZO/TiO2 Semiconductor Coupled...

Buried-Layer Bared AZO/TiO₂ Semiconductor Coupled Films and their Photocatalytic Properties

Abstract:

AZO/TiO2 double-layered semiconductor coupled films were prepared through sequentially depositing AZO and TiO2 films on glass substrates by radio frequency (RF) magnetron sputtering. PVP-pretreatment and post-annealing were performed on these double-layers to achieve an exposure of the AZO buried-layer in different baring conditions. The photocatalytic efficiencies of these buried-layer bared structures were measured through dye decomposition under ultraviolet irradiation. Silver mirror reactions were operated to explore a possible photocatalytic mechanism associated with these buried-layer bared conditions. The buried-layer bared AZO/TiO2 coupled films present 2 ~3 times of photocatalytic activity comparing to the normal AZO/TiO2 double-layered or single layered ones. It suggested that the self-built electrical field formed from coupling semiconductors reduces the recombination of electron-hole pairs, increases the yield of surface photogenerated charges, and enhances the photocatalysis.