Recent advances in photocatalysis for environmental applications

By C. Byrne, Gokulakrishnan Subramanian, S. Pillai. Journal of Environmental Chemical Engineering, 2017

723 citations recorded by the source corpus.

Abstract Advanced Oxidation technologies (AOTs) are gaining attention as an effective waste water treatment methodology capable of degrading diverse spectrum of recalcitrant organic contaminants and microbes. Undoubtedly, photocatalysis is a promising AOT to alleviate the problem of water pollution. Despite recent research into other photocatalysts (e.g. ZnO, ZnS, Semiconductor-Graphene composites, perovskites, MoS2, WO3 and Fe2O3), titanium dioxide (TiO2) remains the most popular photocatalyst due to its low cost, nontoxicity and high oxidising ability. Moreover, titania photocatalysts can easily be immobilized on various surfaces and be scaled up for large scale water treatment. The current review aims to highlight recent advancements in photocatalytic AOTs with main emphasis on TiO2 photocatalysis. This review also discusses the use of TiO2 photocatalysis for water and waste treatment, treating contaminants of emerging concern (CECs), pesticides, endocrine disrupters (EDs) and bacteria using both UV and visible light irradiations. It was concluded that with efficient photoreactor configuration and further studies on the photocatalyst regeneration, TiO2 photocatalysis is a viable option for the reclamation of agricultural/irrigational waste water. Novel doped photocatalysts such as ZnS-CuS-CdS, carbon spheres/CdS, g-C3N4-Au-CdS, ZnS-WS2-CdS, C3N4-CdS and Pd-Cr2O3-CdS have also been discussed. Finally, the advances in the actively studied metal organic framework based photocatalysts that are emerging as effective alternate for metal oxide based photocatalysts is also discussed in detail.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/bd2e9aebae147d1195a407628d05444ecf0746d4

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In Materials Chemistry

1. S. Pillai
2. C. Byrne
3. S. Hinder
4. M. Nolan

In Renewable Energy, Sustainability and the Environment

1. S. Pillai
2. C. Byrne
3. S. Hinder
4. M. Nolan

Citations in the corpus

• Cu-Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity (2018, background): “Existing photocatalyst-based coatings suffer two important disadvantages, they require artificial UV light sources to generate reactive oxygen species (ROS) and secondly these coatings remain inactive in dark atmosphere as the ROS generated in light declines with time [10].”