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Photoelectrocatalysis Study of the Decolorization of Synthetic Azo Dye Mixtures on Ti/TiO2

机译：Ti / TiO2上合成偶氮染料混合物脱色的光电催化研究

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The main goal of this paper was to study the degradation of synthetic dye mixtures, using photoelectrocatalytic properties of particulate films of TiO2 supported on titanium substrate and excited by UV–Vis radiation. The dyes’ decolorizations were measured by spectrophotometric methods and ratios higher than 87 % for a period of 300 min. The stirring speed was an important operational parameter, increasing 12 times the photoelectrocatalytic efficiency. Data analysis has also shown that, under the conditions of this study, the Cl− present in the electrode/solution interface can be oxidized to generate the ClO3 − species. These species turned out to be powerful oxidizing agents, which together with the hydroxyl radical, work in the efficiency of the photocatalytic process. Scanning electron microscopy images of TiO2 film on Ti with indication of the thickness and spherical shape of the sample studied were obtained.
机译：本文的主要目的是利用负载在钛基底上并被UV-Vis辐射激发的TiO2颗粒膜的光电催化特性，研究合成染料混合物的降解。染料的脱色是通过分光光度法测量的，并且在300分钟的时间内其比率高于87％。搅拌速度是重要的操作参数，将光电催化效率提高了12倍。数据分析还显示，在这项研究的条件下，电极/溶液界面中存在的Cl-可以被氧化生成ClO3--。事实证明，这些物质是强氧化剂，与羟基自由基一起作用于光催化过程。获得了Ti上的TiO2膜的扫描电子显微镜图像，该图像指示了所研究样品的厚度和球形。

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