Preparation of Nanosmooth Potassium Tetratitanate Films by Sol-Gel Method

doi:10.3724/SP.J.1077.2007.00749

Abstract

Abstract: A new nanosmooth potassium tetratitanate film was prepared on glass substrates by a sol-gel method using Ti(n-OC₄H₉)₄ and CH₃COOK as precursors. The surface structure of the film was analyzed by atomic force microscope (AFM). The crystal growth of potassium tetratitanate was characterized by TG and XRD. The photocatalytic decomposition of octadecyltrichlorosilane (OTS) based self- assembled monolayers(SAMs) formed on K2Ti4O9 films was studied by using contact angle analysis. The results show that the films consist of flat particles with the ratio of diameter to height about 11. The root
mean square roughness (RMS) of the films measured on an area of 2μm×2μm in AFM images is 4.1nm. Densely packed OTS-SAMs similar in quality to those on TiO₂ are formed on K₂Ti₄O₉. K₂Ti₄O₉ efficiently decomposes OTS-SAMs under UV irradiation in air.

Key words: sol-gel process, potassium tetratitanate film, atomic force microscope, photocatalysis

CLC Number:

O643

QIAN Qing-Hua,BAI Yang,ZHOU Xue-Feng,LIU Chang,FENG Xin,LU Xiao-Hua. Preparation of Nanosmooth Potassium Tetratitanate Films by Sol-Gel Method[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00749.

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Preparation of Nanosmooth Potassium Tetratitanate Films by Sol-Gel Method

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