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首页> 外文期刊>RSC Advances >Photocatalytic degradation of rhodamine B catalyzed by TiO2 films on a capillary column
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Photocatalytic degradation of rhodamine B catalyzed by TiO2 films on a capillary column

机译：毛细管柱上的TiO2薄膜光催化降解罗丹明B。

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摘要

TiO _(2) films on a capillary column were prepared using tetrabutoxytitanium as a source of TiO _(2) via the sol–gel method. The film thickness showed a linear increase with tetrabutoxytitanium concentration. The specific surface area of the film was improved by adding polyethylene glycol with different molecular weights. Under optimal conditions, the prepared film had a good mesoporous structure with specific surface area of 47.72 m ~(2) g ~(?1) , and showed nearly spherical nanoparticles with a 10 nm diameter and anatase phase. Influences of the thickness, specific surface area, and initial solution concentration on photodegradation of rhodamine B using TiO _(2) films as a catalyst were investigated. The results showed that the photodegradation efficiency increased with an increasing thickness and specific surface area of TiO _(2) films. For a rhodamine B solution of 15 mg L ~(?1) , the photodegradation efficiency was 98.33% in 30 min under the optimal conditions. The catalysts could be reused up to eight times with almost the same efficiency, indicating a firm immobilization of films on the inner wall of the capillary. Therefore, TiO _(2) films are promising for the treatment of wastewater.
机译：毛细管柱上的TiO _（2）膜是使用四丁氧基钛作为TiO _（2）的溶胶-凝胶法制备的。膜厚度显示出随着四丁氧基钛浓度的线性增加。通过添加不同分子量的聚乙二醇可以改善薄膜的比表面积。在最佳条件下，制得的薄膜具有良好的介孔结构，比表面积为47.72 m〜（2）g〜（？1），并显示出直径约为10 nm的锐钛矿型近球形纳米颗粒。研究了厚度，比表面积和初始溶液浓度对以TiO_（2）薄膜为催化剂的若丹明B光降解的影响。结果表明，随着TiO_（2）薄膜厚度和比表面积的增加，光降解效率增加。对于若丹明B溶液15 mg L〜（？1），在最佳条件下30分钟内光降解效率为98.33％。催化剂可以以几乎相同的效率重复使用多达八次，表明薄膜牢固地固定在毛细管的内壁上。因此，TiO_（2）薄膜有望用于废水处理。

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