TiO2/柱撑膨润土复合光催化剂制备及应用研究

以改性的新疆乌兰陵格膨润土、四氯化钛和钛酸丁酯为原料，采用柱撑多次负载法制备TiO₂／柱撑膨润土复合光催化剂。并通过改变TiO₂／柱撑膨润土的配比、负载次数、焙烧温度得到最佳制备条件。采用XRD、IR、SEM、EDS对TiO₂／柱撑膨润土复合光催化剂进行了表征。证实TiO₂呈高度分散状态，并已渗入膨润土层间结构，使层间距扩大，形成互不干扰的活性反应中心。在模拟染料废水中，对TiO₂／柱撑膨润土复合光催化剂的光催化降解性能进行了研究。同时用所制TiO₂／柱撑膨润土复合光催化剂对石化含油污水进行了光降解试验。

Study on the Preparation of TiO2 / Pillared Bentonite Composite Photocatalyst and Its Application

With modified Xinjiang Wulanlingge bentonite, titanium tetrachloride and tetrabutyl titanate as the raw materials, TiO₂/pillared bentonite composite photocatalyst was prepared by pillaring and multiple loading method. The optimal conditions for the preparation were obtained by adjusting the proportion of TiO₂/pillared bentonite，number of loading times and roasting temperature．The TiO₂/pillared bentonite composite photocatalyst was characterized by XRD, IR, SEM and EDS. TiO₂ was found to be highly dispersed and have penetrated into the lattice layers of bentonite, enlarging the interlayer space and forming non-interfering active reaction centers. The photocatalytic degradation performance of pillared bentonite composite photocatalyst was studied in simulated dyestuff wastewater and the photo degradation test of this photocatalyst was also made in petrochemical oilcontaining effluent.