【摘要】 概述了利用溶胶-凝胶法合成纯纳米Ti O2粉体时不同合成条件对制备结果的影响;综述了利用溶胶-凝胶法合成金属及非金属离子掺杂Ti O2粉体、半导体复合纳米Ti O2、贵金属沉积以及固体超强酸化纳米Ti O2的研究现状,并指出不同方法提高光催化活性的机理在于促进电子-空穴的分离或改变能带及表面结构。针对制备纳米Ti O2粉体中存在的问题,指出未来的研究方向应是提高Ti O2催化活性的机理研究、可见光化纳米Ti O2的制备以及工业化生产条件探索等。更多还原

【Abstract】 The influence of synthesis condition on pure nano-TiO₂ powder is reviewed.The advances in synthesis of ion-doped TiO₂ powder, coupled semiconductor powder, rare metal deposited TiO₂ powder and solid super acid TiO₂ by sol-gel method are summarized. The mechanisms for the enhancement of the photocatalytic activity of the modified nano-TiO₂ are introduced and enhancement mechanism lies in the separation of electron-hole pairs or the variation of electronic band structure or surface state.As to the problems in preparation of nanometer TiO₂, further study should be focused on the mechanism for the enhancement of the photocatalytic activity of TiO₂, the preparation of nanometer TiO₂ with visible light activity and the study of conditions for industrial production.更多还原