A review on the visible light active titanium dioxide photocatalysts for environmental applications

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• 作者：Miguel Pelaez ; Nicholas T. Nolan ; Suresh C. Pillai ; Michael K. Seery ; Polycarpos Falaras ; Athanassios G. Kontos ; Patrick S.M. Dunlop ; Jeremy W.J. Hamilton ; J.Anthony Byrne ; Kevin O'Shea ; Mohammad H. Entezari ; Dionysios D. Dionysiou
• 关键词：TiO2 ; Visible ; Solar ; Water ; Treatment ; Air purification ; Disinfection ; Non-metal doping ; Anatase ; Rutile ; N&ndash ; TiO2 ; Metal doping ; Environmental application ; Reactive oxygen species ; Photocatalysis ; Photocatalytic ; EDCs ; Cyanotoxins ; Emerging pollutan
• 刊名：Applied Catalysis B: Environmental
• 出版年：2012
• 出版时间：21 August, 2012
• 年：2012
• 卷：125
• 期：Complete
• 页码：331-349
• 全文大小：1757 K

文摘

Fujishima and Honda (1972) demonstrated the potential of titanium dioxide (TiO₂) semiconductor materials to split water into hydrogen and oxygen in a photo-electrochemical cell. Their work triggered the development of semiconductor photocatalysis for a wide range of environmental and energy applications. One of the most significant scientific and commercial advances to date has been the development of visible light active (VLA) TiO₂ photocatalytic materials. In this review, a background on TiO₂ structure, properties and electronic properties in photocatalysis is presented. The development of different strategies to modify TiO₂ for the utilization of visible light, including non metal and/or metal doping, dye sensitization and coupling semiconductors are discussed. Emphasis is given to the origin of visible light absorption and the reactive oxygen species generated, deduced by physicochemical and photoelectrochemical methods. Various applications of VLA TiO₂, in terms of environmental remediation and in particular water treatment, disinfection and air purification, are illustrated. Comprehensive studies on the photocatalytic degradation of contaminants of emerging concern, including endocrine disrupting compounds, pharmaceuticals, pesticides, cyanotoxins and volatile organic compounds, with VLA TiO₂ are discussed and compared to conventional UV-activated TiO₂ nanomaterials. Recent advances in bacterial disinfection using VLA TiO₂ are also reviewed. Issues concerning test protocols for real visible light activity and photocatalytic efficiencies with different light sources have been highlighted.