不同钙源条件下CaTiO_3制备及光催化性能

Preparation and Photocatalytic Properties of CaTiO_3 Using Calcium Sources

采用水热法在无模板或表面活性剂条件下制备了CaTiO_3枝晶结构。X射线衍射、扫描电子显微镜、紫外-可见吸收光度计和比表面积分析仪(BET)对样品进行了表征与分析。对不同钙源种类条件下所制备CaTiO_3样品的微观结构和光降解率进行了分析。结果表明:相比于以Ca(OH)2为钙源所制备样品,钙源为CaCl_2和Ca(NO_3)_2所制备样品降解罗丹明B溶液具有较快的光降解率,这主要是由于CaCl_2和Ca(NO_3)_2所制备的CaTiO_3样品具有高的结晶度及枝晶结构使其具有高的吸收率。其中以Ca(NO_3)_2所制备样品具有更高的光降解率和重复利用率,是因为它的结晶度更高,且枝晶发育更有序所致。

CaTiO3 dendritic structure were prepared without template or surfactant via a hydrothermal method.The samples were characterized by X-ray diffraction,scanning electron microscopy,ultraviolet-visible absorption spectrophotometer and specific surface area analyzer.Effects of calcium source kinds on microstructure and photocatalytic properties of CaTiO3 were studied.The results showed that the photocatalytic rate of CaTiO3 dendrite prepared using CaCl2 and Ca(NO3)2 for degrading RhB solutions are superior to the others.It is attributed that CaTiO3 dendritic structure had high crystallinity and absorption rate.The sample prepared using Ca(NO3)2 reached the optimum photocatalytic rate and high repeated recycle due to highest crystallinity and perfect dendritic structure.