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Citation: YANG Hui, SHEN Qian-Hong, GAO Ji-Wei. Morphology Control of Anatase TiO₂ Films Prepared at Low Temperature Using 4,4’-isopropylidenediphenol[J]. Acta Physico-Chimica Sinica, ;2007, 23(08): 1269-1274. doi: 10.3866/PKU.WHXB20070825 shu

Morphology Control of Anatase TiO₂ Films Prepared at Low Temperature Using 4,4’-isopropylidenediphenol

1.
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China; Green Construction Materials and Applied Technology Engineering Research Center, Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 21 March 2007
Available Online: 8 June 2007

4,4’-isopropylidenediphenol (BPA) was used as a template to control the surface morphology of TiO2 films. A solution was produced by evenly stirring the mixture of the BPA ethanol solution and the TiO2 sol containing anatase grains. The films was prepared from resultant solution by a dip-coating technique, and then the BPA was preferentially extracted by anhydrous ethanol. So the anatase TiO2 films were obtained at low temperature, and the control of the surface morphology of the films was also achieved. Scanning electron microscopy (SEM) was adopted to analyze the influence of the dosage of TiO2 sol, BPA, and the anhydrous ethanol on the morphology of the films, and the control mechanism was also discussed. The results showed that the composition of the solution could affect the move and the aggregation of particles in the drying process of wet films, and thus change the distribution of TiO2 and BPA on the surface of the films, and ultimately influence the surface structure of TiO2 films. With the decrease of BPA concentration, the effect region of BPA was changed from the inside region of the film to the surface region of the film. Low concentration of TiO2 colloidal particle and high content of ethanol were propitious to form rough morphology or porous structure.
- Anatase; Titania film; Surface morphology; Low temperature preparation
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Morphology Control of Anatase TiO2 Films Prepared at Low Temperature Using 4,4’-isopropylidenediphenol

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通讯作者: 陈斌, bchen63@163.com

Morphology Control of Anatase TiO₂ Films Prepared at Low Temperature Using 4,4’-isopropylidenediphenol