Influence of Microwave-Hydrothermal Temperature on Synthesis of TiO2 Thin Films on PMMA Substrates from Colloidal Anatase Aqueous Solutions

Zhi Qing Zhang; Jian Feng Huang; Li Yun Cao; Jian Peng Wu

doi:10.4028/www.scientific.net/KEM.512-515.1682

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Influence of Microwave-Hydrothermal Temperature on...

Influence of Microwave-Hydrothermal Temperature on Synthesis of TiO₂ Thin Films on PMMA Substrates from Colloidal Anatase Aqueous Solutions

Abstract:

Nanocrystalline TiO₂ films were deposited on polymethylmethacrylate (PMMA) substrates by dip–coating process from colloidal anatase aqueous solutions. Microwave–hydrothermal process treating TiO₂ colloidal solutions was applied to enhance crystallization under a mild condition and avoid post–treatment. The as–prepared TiO₂ films were characterized and analysed by X–ray diffraction (XRD), UV–visible spectroscopy and atomic force microscopy (AFM). The photocatalytic degradation of Rhodamine B (RhB) under ultraviolet radiation was explored. Results show that pure anatase TiO₂ is achieved rapidly using microwave hydrothermal process. The TiO₂ suspension becomes uniformly disperse, stable and deposit-free after ultrasonic dispersion. The thin films deposited on unmodified PMMA substrates from the dispersive TiO₂ colloidal solution are dense, homogeneous, crack–free, without visible agglomerates and show high photocatalytic activity without post-treatment. Rhodamine B has been degraded over 99 % after 180 minutes under UV irradiation.

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Periodical:

Key Engineering Materials (Volumes 512-515)

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1682-1685

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1682

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Online since:

June 2012

Authors:

Zhi Qing Zhang, Jian Feng Huang, Li Yun Cao, Jian Peng Wu

Keywords:

Microwave Hydrothermal Process, Photocatalytic Reaction, PMMA, TiO₂ Film

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