Nano-titanium dioxide(TiO2)has huge application prospect in the field of photocatalytic disinfection sterilization due to their excellent photoelectric properties.However,the condition of ultraviolet light greatly limits its application.In recent years,scientists have designed various modifications to greatly improve the visible light utilization of nano-TiO2,mainly noble metal/conventional metal particle modification,nitrogen doping,carbon-titanium dioxide nanomaterials composite,and other semiconductor nanomaterials to form heterojunctions.In this review,the modification types,multifunctional applications and safety problems of new nano-TiO2 photocatalytic disinfectants in recent years are reviewed.This paper emphasizes that these modified new nano-TiO2 photocatalytic disinfectants are often multifunctional,which not only have excellent antibacterial properties,but also show the functions of organic pollutants degradation,toxic heavy metals removal and insecticide.However,the difficult recycling of photocatalysts and inappropriate selection of modification elements may bring biosafety issues,which should be considered in the safety application of nano-photocatalysts.This review can provide a reference for the safe and efficient application of nano-TiO2 photocatalytic disinfectants.
nano-TiO2 photocatalystnoble metal modificationdisinfectantinsecticidetoxicity
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