An environmentally friendly Pt QDs-modified TiO2 photocatalyst by zeolite fixation
Semiconductor nanomaterials photocatalysis technology has shown great potential in dealing with organic water pollution issues,but it still remains a great challenge in practical applications.In this work,a highly efficient eco-friendly TiO2-based photocatalyst(Pt-modified P25@Beta zeolite)was prepared by decorating the P25 nanoparticles with Pt quantum dots(QDs)followed by the Beta-type zeolite crystal fixation.Results showed Pt-modified P25@Beta zeolite nearly gave complete removal of the aniline pollutant with the photodegradation rate at about 90.8％in the aqueous solution under visible light irradiation for 360 min,while the photodegradation rate of chlorophyll(CP)was very low at only 8.6％under the same condition.The outstanding efficient and selective photocatalytic properties of the as-prepared catalyst are attributed to its unique nanostructure with a zeolite crystal sheath with uniform micropores that only enable the aniline pollutant in smaller molecular size to pass through and be fully photodegraded in water while impede the access of the bucky chlorophyll to the surface of the catalyst.
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