Recent progress in metal-doped TiO2, non-metal doped/codoped TiO2 and TiO2 nanostructured hybrids for enhanced photocatalysis

By P. S. Basavarajappa, S. Patil, Nagaraju Ganganagappa, K. R. Reddy, A. Raghu, C. Reddy. 2020

752 citations recorded by the source corpus.

Abstract Titanium dioxide remains a benchmark photocatalyst with high stability, low cost, and less toxicity, but it is active only under UV light; thus, in practical applications using visible light, its catalytic reactions are stalled. To enhance its catalytic activity under visible light, non-metal/codoped TiO2 structures are being studied. These structures improve the photocatalytic activity of TiO2 in visible light by reducing its energy bandgap. This might be useful in wastewater treatment for the photocatalytic degradation of organic contaminants under visible and UV light irradiation. In this intensive review, we describe recent developments in TiO2 nanostructured materials for visible-light driven photocatalysis, such as (i) mechanistic studies on photo-induced charge separation to understand the photocatalytic activity and (ii) synthesis of non-metal doped/codoped TiO2 and TiO2 nanostructured hybrid photocatalysts. Furthermore, the effects of various parameters on their photocatalytic efficiency, photodegradation of various organic contaminants present in wastewater, and photocatalytic disinfection are delineated.

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

View Paper: https://www.semanticscholar.org/paper/2355e92d884d8f583bb9daef8e21c09a13fcbcf4

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Citations in the corpus

• Photocatalytic Applications of Metal Oxides for Sustainable Environmental Remediation (2021, background): “The improved photocatalytic activity is due to the higher porosity, bigger pores, more hydrophilic surface, and a red shift in the bandgap brought by the S dopant [53,54].”
• A review on optical bandgap engineering in TiO2 nanostructures via doping and intrinsic vacancy modulation towards visible light applications (2022, neutral): “Doping and co-doping with metals and non-metals have been found to significantly narrow the bandgap of TiO 2 [38].”