Abstract
Increasing the utilization efficiency of photogenerated electrons is highly recognized as one of the ef-ficient approaches to boost the photocatalytic CO2 conversion efficiency.Herein,ZIF-67-derived porous carbon(PC)material was employed for the construction of PC@ultrafine Bi12O17Br2 nanotubes(PC@BOB NTs)composites through a facile solvothermal synthesis in order to optimize the use of excited elec-trons in the BOB NTs.Photoelectrochemical characterization results revealed that the introduction of PC material achieved a faster charge separation rate in the PC@BOB composites,ensuring more photogener-ated electrons participate in the CO2 adsorption and activation process.Moreover,the pore structures of ZIF-67-derived PC material provided abundant confined spaces for the enrichment of CO2 molecules.Af-ter 5 h of Xenon lamp irradiation,PC@BOB composites exhibited obviously increased photocatalytic CO2 reduction activity in the pure water.When the addition amount of PC was 5 wt％,the PC@BOB-2 com-posite showed the highest CO evolution rate of 359.70 μmol/g,which was 2.95 times higher than that of the pure BOB NTs.This work provides some independent insights into the applications of Metal-Organic Framework(MOF)-derived hierarchical porous structures to strengthen the CO2 enrichment,as well as the excited charge utilization efficiency,thus achieving a high solar-to-fuel conversion efficiency.
基金项目
National Natural Science Foundation of China(22108108)
National Natural Science Foundation of China(22108106)
National Natural Science Foundation of China(22109055)
China Postdoctoral Science Foundation(2022M721381)
NETL
NSTL
万方数据