Srikanth B, Goutham R, Badri Narayan R, Ramprasath A, Gopinath K P, Sankaranarayanan A R
Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, TN, India.
Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, TN, India.
J Environ Manage. 2017 Sep 15;200:60-78. doi: 10.1016/j.jenvman.2017.05.063. Epub 2017 May 29.
The aim of this paper is to provide a review on the usage of different anchoring media (supports) for immobilising commonly employed photocatalysts for degradation of organic pollutants. The immobilisation of nano-sized photocatalysts can eliminate costly and impractical post-treatment recovery of spent photocatalysts in largescale operations. Some commonly employed immobilisation aids such as glass, carbonaceous substances, zeolites, clay and ceramics, polymers, cellulosic materials and metallic agents that have been previously discussed by various research groups have been reviewed. The study revealed that factors such as high durability, ease of availability, low density, chemical inertness and mechanical stability are primary factors responsible for the selection of suitable supports for catalysts. Common techniques for immobilisation namely, dip coating, cold plasma discharge, polymer assisted hydrothermal decomposition, RF magnetron sputtering, photoetching, solvent casting, electrophoretic deposition and spray pyrolysis have been discussed in detail. Finally, some common techniques adopted for the characterisation of the catalyst particles and their uses are also discussed.
本文旨在综述不同锚定介质（载体）在固定常用光催化剂以降解有机污染物方面的应用。纳米级光催化剂的固定化可消除大规模操作中昂贵且不切实际的废光催化剂后处理回收过程。本文回顾了一些常用的固定化助剂，如玻璃、含碳物质、沸石、粘土和陶瓷、聚合物、纤维素材料以及金属试剂，这些已被不同研究小组讨论过。研究表明，诸如高耐久性、易于获取、低密度、化学惰性和机械稳定性等因素是选择合适催化剂载体的主要因素。详细讨论了固定化的常用技术，即浸涂、冷等离子体放电、聚合物辅助水热分解、射频磁控溅射、光刻、溶剂浇铸、电泳沉积和喷雾热解。最后，还讨论了用于表征催化剂颗粒的一些常用技术及其用途。
