摘要
采用简单的水热法结合化学吸附法制备了具有异质结构的光催化剂PANI/F-Bi PO_4,采用X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)、紫外-可见漫反射光谱仪(DRS)、X射线光电子能谱仪(XPS)等对其结构、形貌、光谱特征、表面化学组成等进行了表征和分析。在可见光条件下,考察了PANI/F-Bi PO_4对罗丹明B(Rh B)的光催化降解效率,并且对光催化降解的机理进行了分析。这种异质结构明显拓宽光吸收范围,同时PANI和F-Bi PO_4间载流子的有效迁移产生了内建电场,从而促进了光生电子与空穴的分离。研究表明:PANI/F-Bi PO_4在可见光下表现出优异的光催化活性。经可见光照射4 h,它对40 mg/L的Rh B去除率达到98.7%。
PANI/F-BiPO4 heterojunction composite photocatalyst was fabricated via a facile hydrothermal method followed by chemisorption method. The structures, morphologies, light absorption properties and surface chemical composition of the samples were studied by X-ray diffraction （XRD） , field emission scanning electron microscopy （FESEM）, UV-Vis diffuse reflectance spectrophotometer （DRS） and X- ray photoelectron spectroscopy （XPS）. The photocatalytic activity of PANI/F-BiPO4 was investigated by degradation of RhB in the visible light. Besides, the photocatalytic mechanism was discussed. It was found that PANI/F-BiPO4 exhibited strong absorbance because of the heterostructure formed at their interface. At the same time, a built-in electric field was built due to the effective migration of carrier between PANI and F-BiPO4, which favors the rapid separation of photogenerated holes and electrons. The results show that PANI/F-BiPO4 composite shows excellent photocatalytic activity under the visible light. The degradation rate of 40 mg/L RhB can be up to 98.7% after 4 hour of visible light irradiation.
出处
《人工晶体学报》
CSCD
北大核心
2017年第12期2468-2472,共5页
Journal of Synthetic Crystals
基金
河北省科技计划项目(15211118)
河北省教育厅青年基金(QN2016032)
