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SOL-GEL SYNTHESIS OF NANOSTRUCTURED TiO_2 FILMS FOR WATER PURIFICATION

机译:纳米结构化TiO_2薄膜的溶胶-凝胶法合成

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摘要

Sol gel method is an important technology for the synthesis of TiO_2 films for water treatment. In this chapter, we will discuss the critical issues on the sol gel synthesis of TiO_2 films with high photocatalytic activity and good long-term mechanical stability. The aspects will mainly include the following: (1) design of film structure for increasing the number of electron-hole pairs generated and number of hydroxyl radicals produced, (2) tailor-design of the film pore structure for increasing adsorption of treated contaminants and enhancing mass transfer between the contaminants and catalyst active sites, and (3) improvements in the long-term mechanical stability of the TiO_2 films by achieving good adhesion of immobilized TiO_2 films on the support (substrate). Important achievements of our research works related to sol gel synthesis of TiO_2 films and membranes and the application of these TiO_2 photocatalysts in promising photocatalytic reactors are summarized. Current challenges and future directions on the sol gel synthesis of TiO_2 films for water purification are also discussed.
机译:溶胶凝胶法是合成水处理用TiO_2薄膜的重要技术。在本章中,我们将讨论有关溶胶凝胶合成具有高光催化活性和良好的长期机械稳定性的TiO_2薄膜的关键问题。这些方面将主要包括以下方面:(1)用于增加产生的电子-空穴对数量和产生的羟基自由基数量的膜结构设计;(2)为增加处理的污染物的吸附量身定制的膜孔结构设计;以及增强污染物与催化剂活性位之间的传质,以及(3)通过在载体(基材)上实现固定化TiO_2膜的良好粘合性,提高TiO_2膜的长期机械稳定性。总结了我们在与TiO_2薄膜和膜的溶胶凝胶合成以及这些TiO_2光催化剂在有前途的光催化反应器中的应用有关的研究工作中取得的重要成就。还讨论了用于水净化的TiO_2薄膜的溶胶凝胶合成的当前挑战和未来方向。

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