Photocatalytic degradation of dodecyl-benzenesulfonate over TiO2-Cu2O under visible irradiation.
Photocatalytic degradation of dodecyl-benzenesulfonate over TiO2-Cu2O under visible irradiation.
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DOI：
10.1016/j.jhazmat.2009.02.020
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发表时间：
2009-08
影响因子：
13.6
通讯作者：
Chenghui Han;Zhiyu Li;Jianyi Shen
中科院分区：
文献类型：
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作者：
Chenghui Han;Zhiyu Li;Jianyi Shen
以钛酸丁酯为原料，采用水解法和肼还原法制备了一系列TiO 2-Cu 2 O复合氧化物。采用X射线衍射（XRD）、电感耦合等离子体光谱（ICP）、高分辨透射电子显微镜（HRTEM）、N2吸附和紫外-可见光谱（UV-vis）等技术对复合氧化物进行了表征。在可见光照射下对十二烷基苯磺酸盐（DBS）进行了光催化降解，研究了催化剂组成和反应条件的影响。结果表明，TiO 2-Cu 2 O复合氧化物的光催化活性明显优于Cu 2 O或TiO 2单独使用时的光催化活性。其中，5%TiO2-Cu 2 O复合氧化物的活性最高，对DBS和COD的降解率分别达到97.3%和65%。此外，DBS的分解符合一级动力学，DBS的吸附符合Langmuir模型。溶液中的氧对COD的去除起着至关重要的作用。
A series of TiO2–Cu2O mixed oxides were prepared by the hydrolysis of titanium butoxide and reduction of copper acetate with hydrazine. These composite oxides were characterized by X-ray diffraction (XRD), inductively coupled plasma spectrometry (ICP), high-resolution transmission electron microscopy (HRTEM), N2adsorption and UV–vis techniques. Photocatalytic degradation of dodecyl-benzenesulfonate (DBS) under visible irradiation was performed, and effects of composition of catalysts and reaction conditions were studied. It was observed that TiO2–Cu2O composite oxides exhibited better photocatalytic activity than Cu2O or TiO2alone. Among these composite oxides, the 5%TiO2–Cu2O displayed the highest activity, and the degradation percentage of DBS and COD reached 97.3% and 65%, respectively. In addition, it was found that the decomposition of DBS followed the first-order kinetics and the adsorption of DBS followed the Langmuir model. Oxygen in solution played a vital role in the elimination of COD.