Visible-light assisted photoreduction of CO2 using CdS-decorated Bi24O31Br10

• DOI: 10.1016/j.mssp.2021.106011
• Publication Date: 2021-06-15T15:42:53Z
• Authors: Qingping Mou; Zhenlian Guo; Yongming Chai; Bin Liu; Chenguang Liu
• Keywords: Bismuth; Visible spectrum

Abstract CdS-based heterojunctions are highly active for the production of hydrocarbon fuels from the photoreduction of CO2. In the present study, we have synthesized CdS decorated bismuth oxyhalide (Bi24O31Br10) heterojunction as an efficient nanocomposite material for producing methanol from CO2 using water and TEA as the proton source and sacrificial donor, respectively, under visible-light irradiation. The nanocomposite material exhibited the highest 1739 μmol-g−1 yield of methanol in 24 h than the CdS and Bi24O31Br10 with significant recyclability. The improved yield of methanol was observed due to the confinement of CdS nanoparticles into the bulk of Bi24O31Br10, making a Z-scheme heterojunction. Also, the charge separation was improved with the doping of CdS on Bi24O31Br10 semiconductor support. The synthesized semiconductors and nanocomposite materials have been characterized using XRD, FTIR, HR-TEM, XPS, PL, TGA-DTA, PEC analysis, N2 adsorption-desorption analysis, UV–vis, and Raman spectroscopy.