| A multifunctional thin film was coated on glass substrates for antistatic and UV Shielding can be used as window glass of buildings, automobile, museum, electron panel and so on. ATO particles were used as antistatic component and CeO2-TiO2 were used as UV shielding component, respectively. Firstly, we prepared the ATO solution including ATO particles using low-temperature hydrothermal process, and then discussed the effects of different moral ratio of Sb/Sn, hydrothermal temperature and pH value on the structure and the properties of ATO particles. Secondly, we prepared the CeO2-TiO2 thin films deposited on glass substrates, the effects of different molar ratio of Ce to Ti and the film thickness on UV Shielding efficiency, the surface morphology of CeO2-TiO2 thin films were studied. Finally, the ATO-(CeO2-TiO2) thin films were deposited on glass substrates using the mixed solution by sol-gel dip coating process. And the effects of different molar ratio of ATO to CeO2-TiO2 and the film thickness on the properties of ATO-(CeO2-TiO2) films were studied. The results showed as following:(1) SnCl4:5H2O and SbCl3 were raw materials for preparing the ATO particles. When the hydrothermal temperature is 180℃, pH=1, Sb doping content is 3%, the heat-treated temperature is 450℃, the optimized resistivity(3.11Ω·m) of ATO particles are obtained. ATO particles have the same rutile lattice structure as SnO2 when the Sb doping ratio is in proper range. The hydrothermal process can react under lower temperature which makes it easy to requirement of the equipment and easier to industrialize.(2) Ce(NO3)3·6H2O and C16H36O4Ti were raw materials for preparing the CeO2-TiO2 UV-Shielding thin films. When the molar ratio of CeO2 to TiO2 was 1:1, the thin films showed the best UV-shielding abilities. The quanity of Ce-O-Ti increased with the increase of the film thickness, then formed new sufficient impurity energy levels, strengthened the ability to adopt the electron from valence band, made the absorption edge and cutoff edge of films shifted to red range, therefore, the UV-shielding abilities increased. When the molar ratio of CeO2 to TiO2 was 1:1, the surface of the thin film exhibited a uniformly granular structure. With the increase of the CeO2 doping content, thin films become more roughness, and the visible transmission decreased, finally crack when deposited for 5 levels.(3) Multifunctional films (ATO-(CeO2-TiO2) thin films) can be prepared using one-step deposition process through sol-gel method. UV-shielding abilities had a little decrease when the ATO mixing content increased(10%:85.9%,30%:86.74%,40%: 86.12%,50%:85.56%), however, the films shew few differences in visible transmittance. The composite films have SnO2 crystalline but with substantially lower intensity, the widths of the diffraction peak are considerably broadened due to the small crystalline size and the low heat-treated temperature, causing low crystallization agree. A further increase in heat-treated temperature results in sharper and stronger diffraction peaks. When the ATO doping content increased, the electron conducting path formed rapidly, and the surface sheet resistivity shaply decreased. Static disappeared when the ATO mixing content is 15%, It reached the critical sheet resistivity(R=1.67*104Ω).(4) ATO solution including ATO particles, using low-temperature hydrothermal process, mixed with the CeO2-TiO2 solution can disperse uniformity, then form the thin films with homogeneous components, and the processing can be easily controlled. |
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