Recent advancements in photocatalyst-based platforms for the destruction of gaseous benzene: performance evaluation of different modes of photocatalytic operations and against adsorption techniques

Publication date: Available online 31 August 2019Source: Journal of Photochemistry and Photobiology C: Photochemistry ReviewsAuthor(s): Kumar Vikrant, Chang Min Park, Ki-Hyun Kim, Sandeep Kumar, Eui-Chan JeonAbstractThe photocatalytic treatment of volatile organic compounds (VOCs) is considered a promising alternative to conventional options. The primary feature of photocatalysis is the generation of environmentally benign end products (water and carbon dioxide). Titanium dioxide (TiO2) is the most frequently used photocatalyst, and the advent of TiO2-based composites and other novel materials has expanded the photocatalytic domain in terms of efficiency and visible-light operation. This review assesses the performance of recently developed photocatalysts in removal of gaseous benzene (as a model VOC). The applied photocatalytic systems were classified by mode of operation, i.e., a continuous or batch system. Performance is assessed in terms of space-time and quantum yield values, the influence of inherent properties (e.g., surface chemistry, functionalities, and structure) and operational conditions such as humidity and processing time. Attempts are made to compare the performance of continuous-mode photocatalytic systems against an adsorption system in terms of space velocity. In addition, photothermal catalysis was discussed as a hybrid technology for future applications. The article also highlights the present obstacles to and possible opportunities for the application of...
Source: Journal of Photochemistry and Photobiology C: Photochemistry Reviews - Category: Chemistry Source Type: research