溶剂热法制备片状结构CaTiO_3及光催化性能研究

Preparation and Photocatalytic Properties of Sheet-like CaTiO_3 Structure by Solvothermal Method

在无模板或无表面活性剂条件下,利用溶剂热制备片状结构的CaTiO_3。探究了水热时间对CaTiO_3显微结构和在紫外光下催化降解罗丹明B溶液的光催化活性。分析了CaTiO_3光催化剂加入量和不同p H值的罗丹明B溶液对样品光催化性能的影响。通过扫描电镜(FESEM)、X-衍射仪(XRD)、紫外-可见吸收光谱仪(UV-vis)和比表面积分析仪(BET)对样品进行了性能表征。实验结果表明:当水热时间24 h时制备了具有较好光催化性能的CaTiO_3片状结构。同时加入0.1 g CaTiO_3样品降解p H值为9的罗丹明B溶液中,在紫外光的照射下CaTiO_3样品光催化降解效果最好,60 min可达到K=0.0526 min^(-1),其降解完后的溶液p H呈现中性,对环境不会造成酸碱污染。

Without surfactant or template, CaTiO3 sheet-like structure was prepared by solvothermal synthesis method. Effects of hydrothermal time CaTiO3 microstructure and its photocatalytic activity for the degradation of rhodamine B under UV light irradiation. CaTiO3 addition amount and pH values of rhodamine B solution for CaTiO3 were also studied. The samples were characterized by FESEM, XRD, UV-Vis and BET analysis. The experimental results show that when hydrothermal time is 24 h, CaTiO3 sheet-like structure exhibits the good photocatalytic performance. When CaTiO3 sheet-like structure photocatalyst addition content is 0. 1 g and pH of rhodamine B （ RhB） solution is 9, CaTiO3 sheet-like structure photocatalyst reaches the maximum value K of 0. 0526 min^-1 in 60 min for the degradation of RhB solution under UV light irradiation. After degradation, the RhB solution pH is neutral, which would not cause acid and alkali pollution for the environment.