Heterogeneous Photocatalysis: Recent Advances and Applications

By A. Ibhadon, P. Fitzpatrick. 2013

1,258 citations recorded by the source corpus.

Semiconductor heterogeneous photocatalysis, the subject of this review, is a versatile, low-cost and environmentally benign treatment technology for a host of pollutants. These may be of biological, organic and inorganic in origin within water and air. The efficient and successful application of photocatalysis demands that the pollutant, the catalyst and source of illumination are in close proximity or contact with each other. The ability of advanced oxidation technology to remove low levels of persistent organic pollutants as well as microorganisms in water has been widely demonstrated and, progressively, the technology is now being commercialized in many areas of the world including developing nations. This review considers recent developments in the research and application of heterogeneous semiconductor photocatalysis for the treatment of low-level concentrations of pollutants in water and air using titanium dioxide as a “model” semiconductor. The review considers charge transport characteristics on the semiconductor surface, photocatalyst reactor design and organic degradation mechanistic pathways. The effects of photoreactor operating parameters on the photocatalytic process are discussed in addition to mineralization and disinfection kinetics.

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

View Paper: https://www.semanticscholar.org/paper/971947ca1e0babcdae7a0591a8e6bdc1a12a63a8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Materials Chemistry

In Renewable Energy, Sustainability and the Environment

Citations in the corpus

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes (2017, background): “Semiconductor photocatalysis is a versatile, low-cost, and environmentally friendly treatment technology for many pollutants [8,9], and the use of heterogeneous photocatalysis is an emerging application in water decontamination.”
Removal of hazardous pollutants from wastewaters: applications of TiO 2 -SiO 2 mixed oxide materials (2014, background): “The electron-hole pairs then dissociate into free photoelectrons in the conduction band and holes in the valence band are produced [75, 196, 198, 199].”
A review on optical bandgap engineering in TiO2 nanostructures via doping and intrinsic vacancy modulation towards visible light applications (2022, neutral): “These vacancies and free radicals are responsible for the photodegradation of organic compounds adsorbed onto the TiO 2 surface [23].”
Photocatalytic decolorization of methylene blue using TiO2/UV system enhanced by air sparging (2018, background): “The free electron and the positive hole may recombine, which is undesirable and should be minimized for the sake of photocatalytic activity [17].”