近年来，光催化技术因其高效率、低能耗、低成本、少污染等优点被广泛应用于水处理领域，开发新型、高效的光催化材料是光催化研究的重点和难点。类水滑石及其焙烧产物作为光催化剂处理废水，不会产生二次污染，且可以高效降解水体中的污染物，催化能力较强。本文采用共沉淀法制备含Ti三元类水滑石Ti-LDH，焙烧得其产物Ti-LDO，并对二者用SEM、FT-IR、UV-Vis DRS、BET、XRD等手段表征分析，探究光催化剂的催化性能。主要研究结果如下： （1）含Ti三元类水滑石及其焙烧产物的最佳制备工艺为：Co/Ti/Fe摩尔比为1:2:1，共沉淀剂选择NaOH与Na2CO3的混合溶液；焙烧温度为450℃，焙烧时间为2h。类水滑石材料焙烧后改变了原有的层状结构，孔径变大，有助于提升光催化性能；制备出的两种光催化剂均表现出优异的紫外光吸收性能，焙烧态Ti-LDO的光吸收性能更优。 （2）经实验探究得出，Ti-LDH光催化最佳条件应为：亚甲基蓝溶液初始浓度为20mg/L，pH=2，Ti-LDH投加量为0.07g即0.035g/L，此时降解效率达到75.11%；Ti-LDO光催化实验的最佳条件应为：溶液初始浓度15mg/L，pH=4，Ti-LDO投加量为0.05g即0.025g/L，对亚甲基蓝的降解效率可达97.31%，Ti-LDO的光催化性能优于Ti-LDH。 （3）在紫外光的照射下，制备的含Ti三元类水滑石材料Ti-LDH及其焙烧产物Ti-LDO对亚甲基蓝的光催化反应均符合L-H一级动力学模型；参与此光催化反应的活性基团包括光生空穴和羟基自由基；反应发生2h后，亚甲基蓝的特征峰遭到破坏。

In recent years, photocatalytic technology has been widely used in water treatment because of its high efficiency, low energy consumption, low cost and low pollution. It is the focus and difficulty of photocatalytic research to develop new and efficient photocatalytic materials. The hydrotalcites and its calcined product are used as photocatalysts to treat wastewater, which not only does not cause secondary pollution, but also has strong degradation ability and can effectively remove pollutants in water. Co/Ti/Fe ternary hydrotalcite was prepared by coprecipitation method and calcined to obtain the product, then its catalytic performance were investigated.The main research results are as follows: （1）The optimum preparation process of ternary hydrotalcite containing Ti and its calcined products is as follows: molar ratio of Co/Ti/Fe is 1:2:1, and the co-precipitator should choose the mixed solution of NaOH and Na2CO3; the calcination condition is 450 ℃, and the calcination time is 2 h. After calcination, the original layered structure of hydrotalcite-like materials is changed, and the pore size range becomes larger, which helps to improve the photocatalytic performance. The two hydrotalcite-like photocatalysts prepared show excellent ultraviolet absorption performance, and the light absorption intensity of calcined Ti-LDO is better. （2）The experimental results show that the optimal conditions for photocatalysis of Ti-LDH should be: initial concentration of solution 20mg/L, pH=2, dosage of Ti-LDH is 0.07g, reaction under optimal conditions, simulated dye wastewater The removal rate of methylene blue (MB) solution can reach 75.11%; the optimal conditions for Ti-LDO photocatalysis experiment should be: initial concentration of solution 15mg/L, pH=4, dosage of Ti-LDO is 0.05g, under optimal conditions The reaction rate of MB is up to 97.31%; this also proves that the photocatalytic performance of Ti-LDO is better than that of Ti-LDH. （3）Under the irradiation of ultraviolet light, the photocatalytic reaction of the Ti-LDH containing Ti ternary hydrotalcite and its calcined product Ti-LDO on the MB is consistent with the LH first-order kinetic model; Experiments show that photogenerated holes and hydroxyl radicals are active groups involved in photocatalytic reaction; after photocatalysis for 2 h, the characteristic peak of MB is destroyed.