Photocatalytic activity of poly(3-hexylthiophene)/titanium dioxide composites for degrading methyl orange
Photocatalytic activity of poly(3-hexylthiophene)/titanium dioxide composites for degrading methyl orange
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DOI：
10.1016/j.solmat.2010.05.025
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发表时间：
2010-10
影响因子：
6.9
通讯作者：
Yunfeng Zhu;Y. Dan
中科院分区：
文献类型：
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作者：
Yunfeng Zhu;Y. Dan
以三氯甲烷为溶剂，FeCl 3为氧化剂，采用化学氧化聚合法合成了聚3-己基噻吩（P3 HT），并采用聚合物/无机物共混法制备了聚3-己基噻吩/二氧化钛（P3 HT/TiO 2）复合材料。采用傅里叶变换红外光谱（FTIR）、热重分析（TGA）、紫外-可见漫反射光谱（UV-vis DRS）和X射线光电子能谱（XPS）对P3 HT/TiO 2复合材料进行了表征。结果表明，P3 HT/TiO 2复合材料是由聚3-己基噻吩包覆TiO 2形成的。UV-vis DRS测试结果表明，P3 HT/TiO 2复合材料在可见光范围内具有较强的吸收，表明P3 HT在TiO 2表面的引入可以扩展TiO 2的光响应范围。P3 HT/TiO 2复合材料对橙子（MeO）有一定的吸附作用。在紫外光和可见光照射下，P3 HT/TiO 2复合材料比纯TiO 2更有效地去除溶液中的染料。以P3 HT/TiO 2复合材料为光催化剂，在紫外光和可见光照射下，发现了不同的降解途径。在紫外光照射下，MeO分子中的发色基团主要被裂解，而在可见光照射下，MeO分子中的发色基团与MeO的降解之间存在竞争性的光降解反应.
Poly(3-hexylthiophene) (P3HT) was synthesized by chemical oxidative polymerization method using FeCl3as an oxidant in CHCl3and poly(3-hexylthiophene)/titanium dioxide (P3HT/TiO2) composites were prepared by a convenient polymer/inorganic blending technique. The resulting P3HT/TiO2composites were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS), and X-ray photoelectron spectroscopy (XPS). The results indicated that P3HT/TiO2composites were formed from poly(3-hexylthiophene) covered titanium dioxide. UV–vis DRS measurements showed that P3HT/TiO2composites have a broad and strong absorption in visible range, indicating that the incorporation of P3HT onto the surface of TiO2can extend the photoresponse range of TiO2. P3HT/TiO2composites can adsorb methyl orange (MeO) to a certain extent. Both under UV and visible light irradiation, P3HT/TiO2composites were more efficient in removing dye from solution than pure TiO2. Using P3HT/TiO2composites as photocatalysts, the different degradation pathways of MeO were found under UV and visible light irradiation. The chromophoric groups of MeO molecules were dominantly cleaved under UV light irradiation, while under visible irradiation, the competitive photodegradation reactions between the formation of intermediates with chromophoric group and degradation of MeO occured in the photocatalysis system.