Recent progress in metal-doped TiO2, non-metal doped/codoped TiO2 and TiO2 nanostructured hybrids for enhanced photocatalysis |
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| Affiliation: | 1. Department of Chemistry, Siddaganga Institute of Technology (affiliated to Visvesvaraya Technological University, Belagavi), Tumakuru 560003, India;2. The School of Chemical and Biomolecular Engineering, University of Sydney, Sydney, NSW 2006, Australia;3. Department of Basic Sciences, Center for Emerging Technology (CET), School of Engineering & Technology, JAIN Deemed-to-be University, 562112, Karnataka, India;4. School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea;1. Department of Chemistry and Technology of Functional Materials, Chemical Faculty, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland;2. Centre for Plasma and Laser Engineering, Szewalski Institute of Fluid Flow Machinery, Polish Academy of Science, Fiszera 14, Gdańsk 80-231, Poland;1. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;2. CSIR - North East Institute of Science and Technology, Jorhat, 785006, Assam, India |
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| 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. |
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| Keywords: | Hybrid nanostructures Bandgap Photo-induced species Visible-light responsive photocatalysis |
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