Shushan Song , Ziheng Song , Huarui Han , Kai Wei , Weijie Zhang , Dandan Liu , Qianyu Wang , Changchang Ma , Sheng Feng , Xuemei Duan
{"title":"增强新型 Z 型 Co-MOF/Bi2MoO6 光催化二氧化碳还原活性,生成 CO 和 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":"{\"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}","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
摘要
本文采用原位生长法合成了一种新型Z型Co-MOF/Bi2MoO6。Co-MOF/Bi2MoO6的光催化还原CO2效果显著提高,CO和CH4的形成率分别达到19.76和8.24 μmol-g-1-h-1,分别是Co-MOF(CO:12.31 μmol-g-1-h-1)和Bi2MoO6(CH4:3.46 μmol-g-1-h-1)的1.61和2.38倍。Co-MOF/Bi2MoO6 光催化活性的提高源于其可见光捕获能力的增强,以及 Co-MOF 和 Bi2MoO6 之间形成的 Z 型异质结促进了光生载流子的有效分离,同时保留了最高的氧化还原能力。DRS、XPS、ESR和UPS证实了Co-MOF/Bi2MoO6的Z型电荷转移方向,并解释了其光催化反应机理。此外,还利用 ESR 和原位傅立叶变换红外光谱研究了 Co-MOF/Bi2MoO6 在光催化还原 CO2 过程中的活性物质和中间产物。该研究为构建基于 MOFs 的异质结以提高光催化还原二氧化碳的效果提供了思路。
Enhanced photocatalytic CO2 reduction activity on the novel Z-scheme Co-MOF/Bi2MoO6 to form CO and CH4
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.