【摘要】 钛酸四异丙酯在醋酸溶液中水解生成的多核钛离子经离子交换反应插入到膨润土层间,制得钛柱撑膨润土(TiO2-PILC),再通过光沉积法合成了一系列不同铂量修饰的钛柱撑膨润土(Pt-TiO2-PILCs);用XRD、BET和TEM对制得的复合催化剂进行了性能表征;以五氯酚钠为目标污染物,考察了它们的催化活性.结果表明:柱撑膨润土中TiO2主要以锐钛型存在,含铂的Pt—TiO2-PILCs的催化活性明显高于TiO2-PILC.此外该复合催化剂还具有回收容易、重复使用性好等特点.更多还原

【Abstract】 TiO2 pillared bentonite (TiO2-PILC) was prepared with an intercalation of polynu-clear titanium complex formed by reaction of Ti(i-C3H7O)4 and acetic acid. TiO2 pillared bentonites modified with platinum (Pt-TiO2-PILCs) were carried out via the photodeposition method. Characteristics of the pillared bentonites were examined by XRD, BET, TEM. TiO2-PILC and Pt-TiC-2-PILCs were used as composite photocatalysts in photocatalytic degradation of sodium pentachlorophenate(PCP-Na). The results indicate that all the pillared bentonites contain TiO2 in the anatase phase and with a mean crystallite size of TiO2 about 5nm. The photocatalytic activities of Pt-TiO2-PILCs are superior to that of TiO2-PILC. In addition, the experiments also illustrate that the composite photocatalysts can be easily recovered, regenerated and reused.更多还原