Metal‐Doped Titanium Dioxide for Environmental Remediation, Hydrogen Evolution and Sensing: A Review. Issue 45 (1st December 2021)

• Record Type: Journal Article
• Authors: Mathew, Sneha; John, Bony K.; Abraham, Thomas; Mathew, Beena
• Is Part Of: ChemistrySelect. Volume 6:Issue 45(2021)
• Page Start: 12742
• Page End: 12751
• Publication Date: 2021-12-01
• Subjects: Doping -- environmental remediation -- hydrogen evolution -- photocatalysis -- sensing; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202103577
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Titanium dioxide is an essential photocatalyst for the purification of water and air and energy generation. Titanium dioxide shows relatively high chemical stability and reactivity under ultraviolet light (λ< 387 nm), the energy of which exceeds the 3.3 eV bandgap in the crystalline anatase phase. TiO2 is active under UV light, and its practical applicability is limited under visible light. Modification techniques like metal doping can enhance its activity under visible light. Metal doping is employed for introducing additional states in the TiO2 bandgap. Fewer energy transitions are required to cause visible light absorption by these impurities. This review focuses on the effects of metal‐doping and applications of metal‐doped TiO2 in the fields of environmental remediation, hydrogen evolution, and sensing. Abstract : Titanium dioxide (TiO2 ) is a widely studied photocatalyst due to its several beneficial properties. Metal doping of TiO2 reduces the rate of electron‐hole pair recombination and boosts the photoreactivity of titanium by shifting its optical reaction to visible light.TiO2 is one of the semiconducting metal oxides used for gas sensing.TiO2 does not create hazardous molecules during decomposition, making it ideal for environmental cleanup. Hydrogen energy generation through water splitting by modified TiO2 is a solution to the energy crisis.