Abstract

The present work reports synthesis of titanium dioxide (TiO₂) thin films deposited from ethanolic titanium diisopropoxide bis-acetyl acetonate precursor solution by using spray pyrolysis technique. The deposition of films were carried out on both amorphous and fluorine doped tin oxide (F:SnO₂) glasses. The effect of film thickness on photoelectrochemical, structural, morphological and optical properties of TiO₂ thin films was studied. The photoelectrochemical performance showed highest short circuit current and open circuit voltage at the optimized thickness of the film of 0.921 μm. X-ray diffraction study revealed that the films are polycrystalline, and exhibit anatase phase having tetragonal crystal structure. The TiO₂ electrodes deposited on fluorine-doped substrates were further used in the photoelectrochemical degradation of pollutants such as Methylene blue dye and benzoic acid. The degradation efficiencies were found to be 76 and 55% for the dye and benzoic acid, respectively.

中文翻译：

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二氧化钛光电极增强的光电催化降解活性：膜厚度的影响

摘要

本工作报道了使用喷雾热解技术，从乙醇化二异丙醇钛双乙酰丙酮酸酯前体溶液中合成的二氧化钛（TiO ₂）薄膜的合成。在无定形和氟掺杂的氧化锡（F：SnO ₂）玻璃上均进行膜的沉积。研究了膜厚对TiO ₂薄膜的光电化学，结构，形貌和光学性质的影响。在最佳膜厚度为0.921μm时，光电化学性能显示出最高的短路电流和开路电压。X射线衍射研究表明该膜是多晶的，并显示具有四方晶体结构的锐钛矿相。TiO ₂沉积在掺氟衬底上的电极还用于亚甲基蓝染料和苯甲酸等污染物的光电化学降解。发现染料和苯甲酸的降解效率分别为76和55％。