Volume 40 Issue 11
Nov.  2023
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LI Yuejun, CAO Tieping, SUN Dawei. A bismuth-rich Bi4O5Br2/TiO2 composites fibers photocatalyst enables dramatic CO2 reduction activity[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6251-6259. doi: 10.13801/j.cnki.fhclxb.20230222.004
Citation: LI Yuejun, CAO Tieping, SUN Dawei. A bismuth-rich Bi4O5Br2/TiO2 composites fibers photocatalyst enables dramatic CO2 reduction activity[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6251-6259. doi: 10.13801/j.cnki.fhclxb.20230222.004

A bismuth-rich Bi4O5Br2/TiO2 composites fibers photocatalyst enables dramatic CO2 reduction activity

doi: 10.13801/j.cnki.fhclxb.20230222.004
Funds:  National Natural Science Foundation of China (21573003); Natural Science Foundation of Jilin Province (20140101118JC)
  • Received Date: 2022-12-13
  • Accepted Date: 2023-02-10
  • Rev Recd Date: 2023-02-06
  • Available Online: 2023-02-22
  • Publish Date: 2023-11-01
  • Photocatalytic reduction technology of CO2 can not only achieve energy saving and emission reduction, but also alleviate energy shortage, which is in line with today's concept of green and sustainable development. By employing electrospun TiO2 nanofibers as substrate, bismuth-rich Bi4O5Br2/TiO2 composite fibers were prepared combining with in-situ hydrothermal reduction method. The composition, morphology and photoelectric properties were characterized by XRD, SEM, HRTEM, XPS, UV-Vis and carbon adsorption. The results show that the band gap of Bi4O5Br2/TiO2 composite fibers becomes width, there is obvious absorption in the visible light band, and the reduction ability of photogenerated electrons is enhanced. Bi4O5Br2/TiO2 composite fibers can reduce CO2 to CH4 and CO, while the enrichment of the metal Bi can not only improve the adsorption capacity of the catalyst for acidic CO2 molecules and enhance the conversion efficiency, but also change the photocatalytic reaction path and generate alcohol products such as CH3OH. The CH4, CO and CH3OH yields of the optimized photocatalyst Bi@Bi4O5Br2/TiO2 composite fibers were 3.87, 1.06 and 0.32 μmol·h−1·g−1, respectively, after simulated sunlight irradiation 3 h. This work provides new opportunities for exploring high-efficiency CO2 photoreduction catalysts.


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