biostudies-literatureXuan RWuhan Polytechnic UniversityNational Natural Science Foundation of China25247-25255https://www.ebi.ac.uk/biostudies/studies/S-EPMC11320058biostudies-literatureUnknown14(35)Photocatalytic CO₂ reduction into value-added chemical fuels using sunlight as the energy input has been a thorny, challenging and long-term project in the environment/energy fields because of to its low efficiency. Herein, a series of CdS/Co-BDC composite photocatalysts were constructed by incorporating CdS nanoparticles into Co-BDC using a dual-solvent <i>in situ</i> growth strategy for improving photocatalytic CO₂ reduction efficiency. The composites were characterized through XRD, SEM, TEM, XPS, DRS and EPR techniques in detail. 18% CdS/Co-BDC composites showed superior performance for the photocatalytic CO₂ reduction to CO, which was 8.9 and 19.6 times higher than that showed by the pure CdS and Co-BDC, respectively. The mechanism of enhanced photocatalytic CO₂ reduction performance was analyzed. The CdS/Co-BDC composites showed better adsorption for CO₂. Detailed analysis of XPS, transient photocurrent responses, and electrochemical impedance spectroscopy (EIS) shows the existence of strong charge interaction between CdS and Co-BDC and the photo-electrons of CdS can be transferred to Co-BDC. Additionally, Co-oxo of Co-BDC plays the role of a redox-active site and promotes the reduction performance <i>via</i> the method of valence transition of Co(ii)/Co(iii) redox.RSC advancesEnhanced photocatalytic CO₂ conversion of a CdS/Co-BDC nanocomposite <i>via</i> Co(ii)/Co(iii) redox cycling.PMC113200582024104960232024J0352102111XQ2024004Dou YLi XJiang ZYan JXuan RChai BChen JWang CDing DMo JWang XfalseEnhanced photocatalytic CO₂ conversion of a CdS/Co-BDC nanocomposite <i>via</i> Co(ii)/Co(iii) redox cycling.Photocatalytic CO₂ reduction into value-added chemical fuels using sunlight as the energy input has been a thorny, challenging and long-term project in the environment/energy fields because of to its low efficiency. Herein, a series of CdS/Co-BDC composite photocatalysts were constructed by incorporating CdS nanoparticles into Co-BDC using a dual-solvent <i>in situ</i> growth strategy for improving photocatalytic CO₂ reduction efficiency. The composites were characterized through XRD, SEM, TEM, XPS, DRS and EPR techniques in detail. 18% CdS/Co-BDC composites showed superior performance for the photocatalytic CO₂ reduction to CO, which was 8.9 and 19.6 times higher than that showed by the pure CdS and Co-BDC, respectively. The mechanism of enhanced photocatalytic CO₂ reduction performance was analyzed. The CdS/Co-BDC composites showed better adsorption for CO₂. Detailed analysis of XPS, transient photocurrent responses, and electrochemical impedance spectroscopy (EIS) shows the existence of strong charge interaction between CdS and Co-BDC and the photo-electrons of CdS can be transferred to Co-BDC. Additionally, Co-oxo of Co-BDC plays the role of a redox-active site and promotes the reduction performance <i>via</i> the method of valence transition of Co(ii)/Co(iii) redox.2024-01-01T00:00:00Z2024 Aug2024-11-05T16:08:40.052Z2024-11-05T16:08:40.052ZS-EPMC113200583913924110.1039/d4ra04842c