Influence of Microwave-hydrothermal Temperature on Synthesis of TiO2 Thin Films on PMMA Substrates from Colloidal Anatase Aqueous Solutions
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 were 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.Our experiments show that pure anatase TiO2 is rapidly achieved 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.
TiO2 films Microwave hydrothermal process Photocatalytic reactions PMMA
Zhang Zhi-qing Huang Jian-feng Cao Li-yun Wu Jian-peng
Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science & Technology,Xian Shaanxi,710021,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1682-1685
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）