{"title":"Band Gap Tuning via Supercritical CO2-Induced Exciton Effect in BiFeO3 for Photocatalytic CO2 Reduction","authors":"Zixin Ren, Zongwei Chen, Bo Gao and Qun Xu*, ","doi":"10.1021/acs.nanolett.5c0183210.1021/acs.nanolett.5c01832","DOIUrl":null,"url":null,"abstract":"<p >The exciton effect induced by the Coulomb interaction between photogenerated electrons and holes has an important influence on physical processes such as light absorption, luminescence, excitation, and optical nonlinear interaction in semiconductors. However, there are few studies related to photocatalysis based on the exciton effect. For catalysts, dissociation and the coexistence of excitons are obstacles to the generation of carriers. Therefore, converting excitons to carriers will optimize the photocatalytic process. In this paper, we treated BiFeO<sub>3</sub> with supercritical carbon dioxide (SC CO<sub>2</sub>) to strip two-dimensional (2D) BiFeO<sub>3</sub> and introduced oxygen vacancies, which can dissociate excitons into carriers for photocatalytic reduction of CO<sub>2</sub> under visible light. This work guides the development of the photocatalysis of BiFeO<sub>3</sub> from a new view in terms of excitons.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 19","pages":"8043–8048 8043–8048"},"PeriodicalIF":9.1000,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.nanolett.5c01832","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The exciton effect induced by the Coulomb interaction between photogenerated electrons and holes has an important influence on physical processes such as light absorption, luminescence, excitation, and optical nonlinear interaction in semiconductors. However, there are few studies related to photocatalysis based on the exciton effect. For catalysts, dissociation and the coexistence of excitons are obstacles to the generation of carriers. Therefore, converting excitons to carriers will optimize the photocatalytic process. In this paper, we treated BiFeO3 with supercritical carbon dioxide (SC CO2) to strip two-dimensional (2D) BiFeO3 and introduced oxygen vacancies, which can dissociate excitons into carriers for photocatalytic reduction of CO2 under visible light. This work guides the development of the photocatalysis of BiFeO3 from a new view in terms of excitons.
期刊介绍：
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
- Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale
- Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies
- Modeling and simulation of synthetic, assembly, and interaction processes
- Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance
- Applications of nanoscale materials in living and environmental systems
Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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