- Title
- Z-scheme g-C₃N₄/Bi₂O₂[BO₂(OH)] heterojunction for enhanced photocatalytic CO₂ reduction
- Creator
- Guo, Lina; You, Yong; Huang, Hongwei; Tian, Na; Ma, Tianyi; Zhang, Yihe
- Relation
- Journal of Colloid and Interface Science Vol. 568, Issue 15 May 2020, p. 139-147
- Publisher Link
- http://dx.doi.org/10.1016/j.jcis.2020.02.025
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2020
- Description
- Construction of Z-scheme heterojunction photocatalyst for CO₂ photoreduction shows great significance as it holds strong redox ability and high charge separation efficiency. In this work, we developed a Z-scheme heterojunction photocatalyst graphitic carbon nitride (g-C3₃N₄)/basic bismuth borate (Bi₂O₂[BO₂(OH)]) by a simple high-energy ball milling method. The structure, surface element distribution and morphology of the composite samples were systematically analyzed. The photocatalytic performance of the samples was surveyed by CO₂ reduction experiment under the simulated solar light irradiation. Almost all the g-C₃N₄/Bi₂O₂[BO₂(OH)] composites show enhanced photocatalytic activity for converting CO₂ into CO, and the highest CO production rate observed for g-C₃N₄/Bi₂O₂[BO₂(OH)] (CNBB-3) among all the samples was determined to be approximately 6.09 µmol g-1 h-1, which is 2.78 times higher that of pristine g-C₃N₄. The largely strengthened photocatalytic CO2 reduction activity mainly originates from the formation of Z-scheme band structures between g-C₃N₄ and Bi₂O₂[BO₂(OH)] benefiting for the efficient charge separation, which was confirmed by the photoeletrochemical, photoluminescence and ESR spectra. This study provides a new reference for fabrication of high-performance Z-scheme photocatalysts for CO₂ reduction.
- Subject
- CO₂ reduction; g-C₃N₄; Bi₂O₂[BO₂(OH)]; z-scheme; charge separation
- Identifier
- http://hdl.handle.net/1959.13/1424418
- Identifier
- uon:38073
- Identifier
- ISSN:0021-9797
- Language
- eng
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