Effects of surface Pt modification on titanium nanotubes for photocatalytic methylamine oxidation
In this study,PtClx,PtOx and Pt0 modified titanium dioxide nanotubes(TNTs)materials were prepared by impregnation,precipitation-calcination and photodeposition methods,and were ap-plied to the photocatalytic degradation of methylamine.The results showed that the 0.5％PtClx/TNTs catalysts exhibited the best performance in the photocatalytic degradation of methylamine,with a photo-catalytic efficiency of up to 95％,which remained over 92％after 6 h continuous operation.The effects of different chemical states of Pt on the performance of TNTs in the photocatalytic degradation of meth-ylamine were investigated using XRD,TEM,BET,XPS,UV-Vis DRS,PL and ESR tests.When the Pt elements were loaded in the form of PtOx and Pt0,the adsorption process of methylamine on the sur-face of the catalysts was affected,although the light absorption and carrier separation properties of the samples were enhanced.This scenario was unfavorable for the photocatalytic oxidation process of meth-ylamine.Only when the platinum element was loaded on the TNTs in the form of PtClx to construct a new Pt(Ⅲ)-Pt(Ⅳ)electron transfer channel,the photocatalytic degradation performance of methyla-mine was significantly promoted.
MethylaminePhotocatalytic degradationTitanium nanotubesPlatinum modificationChem-ical states
万方数据
维普
