摘要
In this paper,a novel ionic liquid-assisted solvothermal method to prepare Cl-doped bismuth oxycarbonate(Bi_(2)O_(2)CO_(3))is presented.The ionic liquid of[Hnmp]Cl not only enhances the solvothermal process to help the formation of Bi_(2)O_(2)CO_(3),but also provides chloride element as a dopant.XRD and XPS show that all three samples are Bi_(2)O_(2)CO_(3) with high purity.XPS,solid EPR,and TEM results prove that Cl is doped into the Bi_(2)O_(2)CO_(3) lattice and oxygen vacancies are generated.DRS results show that after Cl doping,the absorption of visible light by Bi_(2)O_(2)CO_(3) is enhanced.Surface photovoltage(SPV)and transient photocurrent tests show that as the doping amount of Cl increases,the separation efficiency of photogenerated electron-hole pairs over Bi_(2)O_(2)CO_(3) improves.The photocatalytic activity of Bi_(2)O_(2)CO_(3) is evaluated by the degradation of rhodamine B,which is increased after Cl doping.This work would broaden the application of ionic liquids in the solvothermal process and deepen the understanding of anionic ion doping in Bi_(2)O_(2)CO_(3).
基金
the National Natural Science Foundation of China(No.21776059 and 21376061)
the Natural Science Foundation for Distinguished Young Scholar of Hebei Province(B2015208010)
the Foundation for the Returned Overseas Chinese Scholars of Hebei Province(CL201609).
