Research Progress on g-C3N4/ZnO Composite Photocatalysts for Pollutant Degradation
ZnO has the advantages of strong photocatalytic activity and high thermal stability.However,because of its large band gap,ZnO can only absorb ultraviolet light,and its solar energy utilization rate is low;And its photo generated electrons are easy to recombine with holes,re-sulting in low quantum efficiency.g-C3N4 is a narrow band gap semiconductor that combines with ZnO to form a heterojunction,which not only improves solar light utilization but also accelerates carrier transfer and improves photocatalytic performance.This article mainly reviews the four composite forms of g-C3N4/ZnO composite photocatalysts,as well as the ternary and quaternary composite materials composed of g-C3N4/ZnO with other substances,and prospects the future development direction of g-C3N4/ZnO composite photocatalysts.
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