In this paper,an efficient photocatalytic catalyst for hydrogen production was re-ported.ZIF-67/NiO was obtained by loading NiO on ZIF-67,and then ZIF-67/NiO was combined with CdS to obtain ZIF-67/NiO/CdS.The results show that the presence of ZIF-67/NiO can improve the utilization of visible light by CdS,and the bandgap of catalyst de-creases from 2.12 eV to 2.01 eV.Using DL-lactic acid as sacrificial agent,the hydrogen production rate of ZIF-67/NiO/CdS can reach 11 987.43 μmol·(h·g)-1,which is about 4.7 times that of pure CdS.Photocurrent response and electrochemical impedance tests proved that ZIF-67/NiO could improve the electron mobility and reduce the electron mobility resistance of the composite catalyst.Finally,a feasible photocatalytic mechanism is pro-posed.The electrons in CB of NiO are transferred to CdS surface driven by p-n junction and participate in hydrogen production process.However,the photoinduced holes on CdS trans-fer to ZIF-67 in the opposite direction and participate in the reduction of lactic acid.
维普
万方数据