V2O5-TiO2催化剂光催化降解2,4-二氯苯酚:催化剂载体和表面活性剂的影响

doi:10.1016/S1872-2067(15)61035-X

催化学报 ›› 2016, Vol. 37 ›› Issue (4): 607-615.DOI: 10.1016/S1872-2067(15)61035-X

V₂O₅-TiO₂催化剂光催化降解2,4-二氯苯酚:催化剂载体和表面活性剂的影响

Eda Sinirtas, Meltem Isleyen, Gulin Selda Pozan Soylu

伊斯坦布尔大学工程学院化工系, 阿维克拉尔 34320, 伊斯坦布尔, 土耳其

收稿日期:2015-10-06 修回日期:2015-12-22 出版日期:2016-03-30 发布日期:2016-03-30
通讯作者: Gulin Selda Pozan Soylu
基金资助:
土耳其科学技术研究委员会(111M210 [2011-2013]).

Photocatalytic degradation of 2,4-dichlorophenol with V₂O₅-TiO₂ catalysts: Effect of catalyst support and surfactant additives

Eda Sinirtas, Meltem Isleyen, Gulin Selda Pozan Soylu

Chemical Engineering Department, Faculty of Engineering, Istanbul University, Avcilar 34320, Istanbul, Turkey

Received:2015-10-06 Revised:2015-12-22 Online:2016-03-30 Published:2016-03-30
Contact: Gulin Selda Pozan Soylu
Supported by:
This work was supported by The Scientific and Technological Research Council of Turkey(TUBITAK)within the research project 111M210 [2011-2013].

摘要/Abstract

摘要：

采用固态分散法成功制备了表面活性剂修饰的不同V₂O₅含量的二元氧化物催化剂, 运用X射线衍射、漫反射光谱、红外光谱、扫描电镜和N₂吸附-脱附法对该纳米复合物进行了表征, 并在紫外光照射下考察了其光催化降解2,4-二氯苯酚的性能. 结果表明, 50 wt%, V₂O₅-TiO₂(记为50V₂O₅-TiO₂)表现出比单纯V₂O₅, TiO₂ 和P25更高的光催化活性, V₂O₅和TiO₂之间的相互作用会影响二元氧化物催化剂的光催化效率. CTAB和HTAB的修饰显著增加了50V₂O₅-TiO₂样品的催化效率, 其中(50V₂O₅-TiO₂)-CTAB催化剂在反应30 min后表现出最高的2,4-二氯苯酚降解率(100%)和反应速率(2.22 mg/(L·min)). 表面活性剂的加入能修饰二元氧化物中V₂O₅和TiO₂的光学和电子性质, 从而显著提高其光催化活性.

关键词: 2,4-二氯苯酚, 降解, 光催化, 表面活性剂, 二元氧化物, 表征

Abstract:

Binary oxide catalysts with various weight percentage V₂O₅ loadings were prepared by solid-state dispersion and the nanocomposites were modified with surfactants. The catalysts were analyzed using X-ray diffraction, diffuse-reflectance spectroscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, and N₂ adsorption-desorption. The photocatalytic activities of the catalysts were evaluated in the degradation of 2,4-dichlorophenol under ultraviolet irradiation. The photocatalytic activity of 50 wt% V₂O₅-TiO₂ (50V₂O₅-TiO₂) was higher than those of pure V₂O₅, TiO₂, and P25. Interactions between V₂O₅ and TiO₂ affected the photocatalytic efficiencies of the binary oxide catalysts. Cetyltrimethylammonium bromide (CTAB) and hexadecyltrimethylammonium bromide (HTAB) significantly enhanced the efficiency of the 50V₂O₅-TiO₂ catalyst. The highest percentage of 2,4-dichlorophenol degradation (100%) and highest reaction rate (2.22 mg/(L·min)) were obtained in 30 min with the (50V₂O₅-TiO₂)-CTAB catalyst. It is concluded that the addition of a surfactant to the binary oxide significantly enhanced the photocatalytic activity by modifying the optical and electronic properties of V₂O₅ and TiO₂.

Key words: 2,4-Dichlorophenol, Degradation, Photocatalysis, Surfactant, Binary oxide, Characterization

Eda Sinirtas, Meltem Isleyen, Gulin Selda Pozan Soylu. V₂O₅-TiO₂催化剂光催化降解2,4-二氯苯酚:催化剂载体和表面活性剂的影响[J]. 催化学报, 2016, 37(4): 607-615.

Eda Sinirtas, Meltem Isleyen, Gulin Selda Pozan Soylu. Photocatalytic degradation of 2,4-dichlorophenol with V₂O₅-TiO₂ catalysts: Effect of catalyst support and surfactant additives[J]. Chinese Journal of Catalysis, 2016, 37(4): 607-615.

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V₂O₅-TiO₂催化剂光催化降解2,4-二氯苯酚:催化剂载体和表面活性剂的影响

Photocatalytic degradation of 2,4-dichlorophenol with V₂O₅-TiO₂ catalysts: Effect of catalyst support and surfactant additives

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