Enhanced visible light photocatalytic degradation of methylene blue by F-doped TiO2
Enhanced visible light photocatalytic degradation of methylene blue by F-doped TiO2
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DOI：
10.1016/j.apsusc.2014.07.038
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发表时间：
2014-11
影响因子：
6.7
通讯作者：
Wei Yu;Xinjuan Liu;L. Pan;Jinliang Li;Junying Liu;Jing Zhang;Ping Li;Cheng Chen;Zhuo Sun
中科院分区：
文献类型：
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作者：
Wei Yu;Xinjuan Liu;L. Pan;Jinliang Li;Junying Liu;Jing Zhang;Ping Li;Cheng Chen;Zhuo Sun
采用改进的溶胶凝胶法成功地合成了氟掺杂的二氧化钛(F-TiO2光催化剂)。用扫描电子显微镜、透射电子显微镜、X射线衍射仪、紫外可见吸收光谱和电化学阻抗谱分别表征了其形貌、结构和光催化降解亚甲基蓝(MB)的性能。结果表明，在可见光照射下，F-TiO2对亚甲基蓝的光催化降解性能较好，最大降解率为91%，比纯TiO2光催化剂的降解率(32%)高出91%。这种优异的光催化活性是由于F的掺杂增加了可见光的吸收，促进了光生电子和空穴的分离，以及增强了光催化氧化物种。
F-doped TiO2(F-TiO2) were successfully synthesized using a modified sol–gel method. The morphologies, structures, and photocatalytic performance in the degradation of methylene blue (MB) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV–vis absorption spectroscopy, and electrochemical impedance spectra, respectively. The results show that F-TiO2exhibits an enhanced photocatalytic performance in the degradation of MB with a maximum degradation rate of 91% under visible light irradiation as compared with pure TiO2(32%). The excellent photocatalytic activity is due to the contribution from the increased visible light absorption, promoted separation of photo-generated electrons and holes as well as enhanced photocatalytic oxidizing species with the doping of F in TiO2.