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Photocatalysis as an Effective Advanced Oxidation Process
Citation:
Nadagouda, M., C. Han, S. Pillai, N. McGuinness, C. Byrne, P. Falaras, A. Kontos, M. Gracia-Pinilla, R. Mangalaraja, K. O'Shea, AND D. Dionysiou. Photocatalysis as an Effective Advanced Oxidation Process. Chapter 8, Mihaela I. Stefan (ed.), Advanced Oxidation Proceses for Water Treatment: Fundamentals & Applications. IWA Publishing, London, Uk, , 333, (2017). https://doi.org/10.2166/9781780407197
Impact/Purpose:
Advanced Oxidation Processes for Water Treatment presents the most recent scientific and technological achievements in process understanding and implementation, and addresses to anyone interested in water remediation, including water industry professionals, consulting engineers, regulators, academics, students.
Description:
Photocatalysis is generally referred to as the acceleration of a photoreaction by the presence of a semiconductor catalyst such as titanium dioxide (TiO2) or zinc oxide (ZnO). Photocatalytic materials can be prepared by using various methods such as a sol-gel process, solution processing, microwave-assisted synthesis, electrochemical, hydrothermal and solvothermal synthesis. These materials can be applied to a range of surfaces as they possess many desirable properties such as decontamination, disinfection and self-cleaning. Improvements in the properties of photocatalysts can be achieved by doping the semiconductor with both metal and non-metal species. Various mechanisms involving photocatalysis are discussed in detail. UV, solar and visible light-induced photocatalysis and its applications in the treatment of water in general and for contaminants of emerging concerns in particular are also described. Additionally, applications of nanotubular TiO2-based materials for water and air purification are detailed with a number of recent examples. Discussion is also provided on materials such as spinel ferrites that possess a narrow band gap and serve as magnetically separable photocatalysts. Moreover, a number of recent examples regarding approaches to improve the photocatalytic process by using metal and non-metal-doped TiO2, materials with metal/inorganic hetero-structures, nano-heterojunctions, graphitic carbon nitride, and graphene composites are discussed. These novel photocatalytic materials offer excellent potential for various future environmental applications. However, extensive research will be required to address the stability and robustness of these catalysts under various environmental conditions. It is concluded that the rapid growth in the discoveries of novel photocatalytic materials offers great promise for the future of advanced oxidation processes (AOPs).
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DOI: Photocatalysis as an Effective Advanced Oxidation Process
advanced-oxidation-processes-water-treatment-fundamentals-and-applications