{"title":"Oxygen Vacancy Modification MIL-125(Ti) Promotes CO<sub>2</sub> Photoreduction to CO with Near 100% Selectivity.","authors":"Hangmin Xu, Hao Song, Xiaozhi Wang, Xingwang Zhu","doi":"10.3390/ma18061343","DOIUrl":null,"url":null,"abstract":"<p><p>The substantial release of industrial carbon dioxide has been identified as a key factor in the development of various environmental issues. In addressing these concerns, the utilization of photocatalytic technology for carbon reduction has garnered significant attention. The disadvantage of CO<sub>2</sub> photoreduction is the problem of product yield and selectivity. It is known that MIL-125(Ti) with a high specific surface area (S<sub>BET</sub>) possesses more active sites using Ti as a node. The calcination of MIL-125(Ti) in a reducing atmosphere has been shown to introduce oxygen vacancies (O<sub>V</sub>), thereby enhancing the material's surface and internal pores. This process has been demonstrated to result in a significant increase in the S<sub>BET</sub> and an enhancement of the Ti<sup>3+</sup>/Ti<sup>4+</sup> ratio. The increased Ti<sup>3+</sup> centers have been found to improve the material's reducing properties. The results demonstrate that the O<sub>V</sub>-rich MIL-125-2H material exhibits the high-performance and highly selective photoreduction in CO<sub>2</sub>.</p>","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 6","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11943590/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3390/ma18061343","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
The substantial release of industrial carbon dioxide has been identified as a key factor in the development of various environmental issues. In addressing these concerns, the utilization of photocatalytic technology for carbon reduction has garnered significant attention. The disadvantage of CO2 photoreduction is the problem of product yield and selectivity. It is known that MIL-125(Ti) with a high specific surface area (SBET) possesses more active sites using Ti as a node. The calcination of MIL-125(Ti) in a reducing atmosphere has been shown to introduce oxygen vacancies (OV), thereby enhancing the material's surface and internal pores. This process has been demonstrated to result in a significant increase in the SBET and an enhancement of the Ti3+/Ti4+ ratio. The increased Ti3+ centers have been found to improve the material's reducing properties. The results demonstrate that the OV-rich MIL-125-2H material exhibits the high-performance and highly selective photoreduction in CO2.
期刊介绍：
Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.
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