Shushan Song , Ziheng Song , Huarui Han , Kai Wei , Weijie Zhang , Dandan Liu , Qianyu Wang , Changchang Ma , Sheng Feng , Xuemei Duan
{"title":"Enhanced photocatalytic CO2 reduction activity on the novel Z-scheme Co-MOF/Bi2MoO6 to form CO and CH4","authors":"Shushan Song , Ziheng Song , Huarui Han , Kai Wei , Weijie Zhang , Dandan Liu , Qianyu Wang , Changchang Ma , Sheng Feng , Xuemei Duan","doi":"10.1016/j.apcata.2024.119834","DOIUrl":null,"url":null,"abstract":"<div><p>Herein, a novel Z-scheme Co-MOF/Bi<sub>2</sub>MoO<sub>6</sub> was synthesized by in-situ growth method. The photocatalytic CO<sub>2</sub> reduction effect of Co-MOF/Bi<sub>2</sub>MoO<sub>6</sub> was significantly improved, and the formation rates of CO and CH<sub>4</sub> reached 19.76 and 8.24 μmol·g<sup>−1</sup>·h<sup>−1</sup>, which corresponded to 1.61 and 2.38 times of Co-MOF (CO: 12.31 μmol·g<sup>−1</sup>·h<sup>−1</sup>) and Bi<sub>2</sub>MoO<sub>6</sub> (CH<sub>4</sub>: 3.46 μmol·g<sup>−1</sup>·h<sup>−1</sup>), respectively. The increased photocatalytic activity of Co-MOF/Bi<sub>2</sub>MoO<sub>6</sub> resulted from the enhanced visible light capture capability and the Z-scheme heterojunction formed among Co-MOF and Bi<sub>2</sub>MoO<sub>6</sub>, which promoted the efficient separation of photogenerated carriers while retaining the highest redox capacity. The Z-scheme charge transfer direction of Co-MOF/Bi<sub>2</sub>MoO<sub>6</sub> was confirmed by DRS, XPS, ESR, UPS, and the photocatalytic reaction mechanism was explained. In addition, the active substances and intermediates of Co-MOF/Bi<sub>2</sub>MoO<sub>6</sub> in the photocatalytic CO<sub>2</sub> reduction process were investigated using ESR and in-situ FT-IR. The work offers a idea for building MOFs-based heterojunctions to improve the effect of photocatalytic CO<sub>2</sub> reduction.</p></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis A: General","FirstCategoryId":"1","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926860X24002795","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Herein, a novel Z-scheme Co-MOF/Bi2MoO6 was synthesized by in-situ growth method. The photocatalytic CO2 reduction effect of Co-MOF/Bi2MoO6 was significantly improved, and the formation rates of CO and CH4 reached 19.76 and 8.24 μmol·g−1·h−1, which corresponded to 1.61 and 2.38 times of Co-MOF (CO: 12.31 μmol·g−1·h−1) and Bi2MoO6 (CH4: 3.46 μmol·g−1·h−1), respectively. The increased photocatalytic activity of Co-MOF/Bi2MoO6 resulted from the enhanced visible light capture capability and the Z-scheme heterojunction formed among Co-MOF and Bi2MoO6, which promoted the efficient separation of photogenerated carriers while retaining the highest redox capacity. The Z-scheme charge transfer direction of Co-MOF/Bi2MoO6 was confirmed by DRS, XPS, ESR, UPS, and the photocatalytic reaction mechanism was explained. In addition, the active substances and intermediates of Co-MOF/Bi2MoO6 in the photocatalytic CO2 reduction process were investigated using ESR and in-situ FT-IR. The work offers a idea for building MOFs-based heterojunctions to improve the effect of photocatalytic CO2 reduction.
期刊介绍:
Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications.
Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.