Recent progress of Ag/TiO2 photocatalyst for wastewater treatment: Doping, co-doping, and green materials functionalization. (June 2022)

• Record Type: Journal Article
• Authors: Kanakaraju, Devagi; anak Kutiang, Feniellia Diwvya; Lim, Ying Chin; Goh, Pei Sean
• Is Part Of: Applied materials today. Volume 27(2022)
• Publication Date: 2022-06
• Subjects: Titanium dioxide -- Photocatalysis -- Silver -- Doping -- Green materials -- Ionic liquid; IL Ionic liquid -- UV Ultraviolet -- AOPs Advanced Oxidation Processes -- LSPR Localized Surface Plasmon Resonance -- MO Methyl orange -- CNFs Cellulose nanofibers -- PEG Polyethylene glycol -- Alg Alginate -- MT Montmorillonite -- CA Cellulose acetate -- SPR Surface Plasmon Resonance -- RTIL Room temperature ionic liquid -- NPs Nanoparticles; Materials science -- Periodicals; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1016/j.apmt.2022.101500
• Languages: English
• ISSNs: 2352-9407

Abstract

Highlights: The advantages of silver(Ag) as TiO2 dopant have been highlighted. The roles of metals, non-metals doping, and co-doping of Ag/TiO2 were discussed. Green support materials for Ag/TiO2 -based photocatalysts were reviewed. Conclusions and opportunities for future research have been provided. Abstract: Surface modification via doping or functionalization is one of the most commonly applied approaches for addressing the innate limitations of TiO2 photocatalysts. Amongst numerous dopants, silver (Ag) has been regarded as an efficient strategy to retard electron holes recombination due to the formation of the Schottky barrier on the TiO2 interface and extending absorption to the visible region. This review primarily focuses on discussing and evaluating the recent progress in the modification of Ag/TiO2 via co-doping with non-metals and transition metals, as well as the synthesis strategies that have been applied in engineering the materials. The effects of doping and co-doping on the induced chemical and physical properties, photocatalytic performance, stability, and recyclability aspects have also been highlighted. This review also examines the potential improvement of Ag/TiO2 through the addition of green materials such as plant-based materials (cellulose-derived composites, chitosan, alginate), ceramic materials (clay, kaolin bentonite), and also ionic liquid green solvent. Recommendations for further research opportunities, limitations, and challenges have also been suggested. Graphical abstract: Image, graphical abstract