采用溶胶-凝胶法制备了氯掺杂二氧化钛柱撑蒙脱土催化剂.利用XRD、SEM、UV-ViS-DRS、光致发光谱(PLS)、N:吸附-脱附和XPS等测试技术对其进行了表征.结果表明,该催化剂具有明显的锐钛矿相结构,且氯掺杂与二氧化钛柱撑后,蒙脱土的层间结构没有完全被破坏;氯掺杂拓宽了其光吸收范围,在可见光区吸收增强;其带隙能由3.t9 eV减小至3.14 eV;氯以阴离子形式存在于TiO2晶格中.对硝基苯胺降解实验表明,氯掺杂可显著提高二氧化钛柱撑蒙脱土的光催化活性,氯掺杂量为6%(与钛的摩尔比)的催化剂具有较好光催化活性.
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