Abstract
Metal clusters or even single-atoms dispersed and anchored on the photocatalysts'surface can enhance photocatalytic performances on organic pollutant oxida-tion.Here,a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters(MSCs,M=Cu,Pd,Au and Ag)on P-modulated tubular carbon nitride(TCN).The obtained MSCs@TCN demon-strated excellent photocatalytic performances for the degradation of sulfamethazine(SMZ).In particular,the photocatalyst with 2 wt％Cu loading showed ultrahigh SMZ oxidation efficiency(k=0.06110 min-1),almost three times that of TCN(k=0.02066 min-1).It also shows excellent stability in the 5th-cycle measurements.The improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites,accelerated charge transfer from bulk TCN to Cu sites through Cu-Nx interaction.Meanwhile,the active sites of Cu single-atoms/clusters could promote the pro-duction of O2-,which participates in organic oxidation with strong oxidizing holes(h+).This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.
维普
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