中文摘要：

以蒙脱石为基底，采用溶胶-凝胶法制备二氧化钛／蒙脱石（TiO2／Mmt）复合光催化材料，通过Fe（NO3）3-HNO3体系水解生长纳米FeOOH，从而制备出负载型羟基氧化铁／二氧化钛／蒙脱石（FeOOH／TiO2／Mmt）复合光催化材料以改善材料在可见光下的光催化性能。高分辨透射电镜的表征结果显示，FeOOH／TiO2复合薄膜厚度约为10～40nm，TiO2为晶粒粒径约为5～10nm的锐钛矿，FeOOH为长10～30nm，宽约4nm的针铁矿。以甲基橙为目标物，对FeOOH／TiO2／Mmt复合材料的光催化性能进行初探，在甲基橙初始浓度为5mg／L，催化剂用量为1．875g／L，H2O2初始浓度为2mmol／L，pH值为6．5，350w氙灯照射1h，甲基橙脱色率达到99％，明显优于相同条件下TiO2／Mmt对甲基橙的45％脱色率；同时甲基橙残液的红外光谱图显示FeOOH／TiO2／Mmt／H2O2／UV体系比FeOOH／TiO2／Mmt／H2O2／Visible light体系具备更好的光催化氧化苯环的能力，降解更为彻底。

英文摘要：

TiO2/Montmorillonite （TiO2/Mmt） composite was firstly prepared by the sol-gel method, then was put into the Fe（ NO3 ） 3-HNO3 system in order to form the nano-FeOOH/TiO2/Mmt composite depending on the hydrolysis of Fe^3＋ through controlling pH, temperature and concentration. This sample could improve the photoeatalysis effect in visible light. TEM result showed that the FeOOH/TiO2 composite film is 10 - 40 nm thick, and TiO2 is anatase measured at 5 - 10 nm in size, on TiO2/Mmt surface the goethite nanofilm was formed which is measured at 10 -30 nm in length,and 4 nm in width. Finally. FeOOH/TiO2/Mmt composite was also used to degrade methyl orange （MO） to testify its photocatalytic activity, with the initial concentrations of MO, H2O2 and catalyzer being 5 mg/L, 2 mmol/L and 1. 875 g/L, respectively,pH = 6. 5 ,the discoloration efficiency of MC is about 99 % in 350 W visible light irradiation for 1 hour and is far better than the TiO2/Mmt composite. The IR spectra of MO showed that the FeOOH/ TiO2/Mmt/H2O2/UV system possesses the better photocatalytic activity than FeOOH/TiO2/Mmt/H2 O2/Visible light for the strong capability of oxidating benzene ring