TiO2光催化氧化技术处理环境污染物的研究进展

阐述了TiO2光催化氧化法的原理、TiO2催化剂的制备以及粉末型和负载型两种形态的TiO2在光催化氧化有机污染物方面的应用情况,指出粉末型TiO2主要应用于废水处理,负载型TiO2主要应用于废水处理、垃圾填埋场渗滤液处理和环境净化。粉末型TiO2的研究发展方向是通过改性以提高其活性和可应用性,如表面沉积贵金属、表面耦合、表面敏化、过渡金属掺杂等;负载型TiO2的研究方向是通过改性以提高催化活性,选择合适的载体,充分发挥载体的优势,加强固定态光催化氧化技术与其他技术的联用,利用太阳能作用光源等。

Advances in research of TiO2 photo-catalytic oxidation technique for treatment of environmental pollutants

The mechanisms of TiO_2photo-catalytic oxidation technique,preparation of catalyst and application of both suspended and immobilized TiO_2 to the treatment of organic pollutants were introduced.It is presented that suspended TiO_2 is mainly used in wastewater treatment,while immobilized TiO_2 can be used in the treatment of wastewater and leachate from landfill and the purification of environment.The development tendency of suspended TiO_2is to improve its activity and application to the surface deposition of heavy metals,surface coupling,surface sensitization,and intermingle of transition metal.The research tendency of immobilized TiO_2 is to improve its catalytic activity,to choose suitable carrier and make the best of it,to strengthen the combination between photo-catalytic oxidation and other techniques,and to use solar energy as light source.