The BiOCl(BOC)synthesized by the water bath heating method was treated with sodium borohydride(NaBH_(4))to introduce oxygen vacancies(OVs).At the same time,Au nanoparticles were loaded to prepare a series of Au/BiOCl ...The BiOCl(BOC)synthesized by the water bath heating method was treated with sodium borohydride(NaBH_(4))to introduce oxygen vacancies(OVs).At the same time,Au nanoparticles were loaded to prepare a series of Au/BiOCl samples with different ratios.OVs and Au nanoparticles can promote the light absorption of host photocatalyst in the visible region.The calculated work function of BiOCl and Au can verify the existence of Ohmic contact between the interface of them,which is conducive to the separation of charge carriers.Through a series of photoelectric tests,it was verified experimentally that the separation of charge carriers is indeed enhanced.The high-energy hot electrons produced by Au under the surface plasmon resonance(SPR)effect can increase the counts of electrons to participate in the CO_(2)reduction reaction.Especially for 1.0%-Au/BOC,the yields of CO can reach 43.16μmol g^(−1)h^(−1),which is 6.6 times more than that of BOC.Therefore,loading precious metal on semiconductors is an effective strategy to promote the photocatalytic performance of CO_(2)reduction reactions.展开更多
基金supported by the National Natural Science Foundation of China(Nos.51772183.52072230)the Yulin Science and Technology Project(No.CXY-2020-040)。
文摘The BiOCl(BOC)synthesized by the water bath heating method was treated with sodium borohydride(NaBH_(4))to introduce oxygen vacancies(OVs).At the same time,Au nanoparticles were loaded to prepare a series of Au/BiOCl samples with different ratios.OVs and Au nanoparticles can promote the light absorption of host photocatalyst in the visible region.The calculated work function of BiOCl and Au can verify the existence of Ohmic contact between the interface of them,which is conducive to the separation of charge carriers.Through a series of photoelectric tests,it was verified experimentally that the separation of charge carriers is indeed enhanced.The high-energy hot electrons produced by Au under the surface plasmon resonance(SPR)effect can increase the counts of electrons to participate in the CO_(2)reduction reaction.Especially for 1.0%-Au/BOC,the yields of CO can reach 43.16μmol g^(−1)h^(−1),which is 6.6 times more than that of BOC.Therefore,loading precious metal on semiconductors is an effective strategy to promote the photocatalytic performance of CO_(2)reduction reactions.
