Preparation of ZnO/CN composite nanomaterials and their photocatalytic performance
The composite nanomaterial ZnO/CN was prepared by combining zinc-layered double hydroxide(Zn-LDH)and carbon nitride(g-C3 N4).The photocatalytic performance of ZnO/CN was investigated,and its photocatalytic mechanism was analyzed.The results show that LDH layer structure appears in g-C3 N4 with the increase of Zn content after the introduction of Zn source,which increases its specific surface area.At the same time,with the generation of ZnO,ZnO/CN composite nanomaterials are formed,and ZnO and g-C3 N4 are connected by Zn-N covalent bond through coordination.The formation of Zn-N bonds in the composite catalyst significantly reduces the singlet-triplet energy level difference(ΔEST)value,promoting the intersystem crossing(ISC)process and enhancing the efficiency of singlet oxygen(1 O2)generation while inhibiting other reactive oxygen species(ROS)production.After 120 min of photocatalytic oxidation using 1,5-dihydroxynaphthalene(1,5-DHN),the yield of Juglone can be reached 70％.
国家科技期刊平台
NSTL
万方数据
