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采用CaCO3和TiO2作为原料,在1400℃、2h条件下烧结得到CaTiO3.应用X射线衍射(XRD)、扫描电子显微镜(SEM)对高温处理后的混合物料进行了表征.以亚甲基蓝为降解物,研究了光照时间、pH值、溶液初始浓度、催化剂投加量对CaTiO3光催化性能的影响.实验结果表明,光照时间延长,亚甲基蓝降解率增加,但是亚甲基蓝被降解速率降低;碱性条件有利于CaTiO3对亚甲基蓝的光催化降解;CaTiO3对低浓度的亚甲基蓝溶液具有较高的光催化降解率;随着CaTiO3投加量增加,亚甲基蓝降解率增大,但是当CaTiO3投加量大于0.1g时,随着CaTiO3投加量的增加,亚甲基蓝的降解率几乎不变,甚至有所降低.
CaTiO3 was obtained by sintering at 1400 ℃ for 2h using CaCO3 and TiO2 as raw materials.The composite materials after high temperature treatment were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) The effect of CaTiO3 on the photocatalytic activity of CaTiO3 was studied under the conditions of light time, pH value, initial concentration of the solution and dosage of the catalyst. The experimental results showed that the degradation rate of methylene blue increased with the increase of light irradiation time, but the degradation rate of methylene blue decreased. Methylene blue photocatalytic degradation; CaTiO3 on the low concentration of methylene blue solution has a higher rate of photocatalytic degradation; with the dosage of CaTiO3 increase methylene blue degradation rate increases, but when the CaTiO3 dosage is greater than 0.1g, with the CaTiO3 Dosing rate increases, methylene blue degradation rate almost unchanged, or even reduced.