Contribution of CuO on lamellar BiVO4/Bi2O3-based semiconductor for photoconversion of CO2

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dc.contributor.authorCorradini, Patricia Gon
dc.contributor.authorBrito, Juliana Ferreira de [UNESP]
dc.contributor.authorBlaskievicz, Sirlon F
dc.contributor.authorSalvati, Byanca S
dc.contributor.authorMenezes, Beatriz Costa e Silva [UNESP]
dc.contributor.authorZanoni, Maria Valnice Boldrin [UNESP]
dc.contributor.authorMascaro, Lucia Helena
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionScience and Technology
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T16:16:08Z
dc.date.available2023-07-29T16:16:08Z
dc.date.issued2023-10-01
dc.description.abstractLamellar BiVO4 is a photocatalyst recognized as an effective visible-light-driven semiconductor that is active in CO2 reduction but faces challenges such as high recombination rate and low mobility of photogenerated charge carriers. Additionaly, CuXO are well-known materials for CO2 photosynthesis, and Bi2O3 improves the generation of organic compounds from CO2 reduction with more than one carbon. In this sense, this paper evaluates the influence of small amounts of copper oxide on lamellar BiVO4-Bi2O3 prepared by a microwave-assisted route on the CO2 photoreduction activity. Lamellar BiVO4-Bi2O3 powder catalysts modified by different percentages of CuO were synthesized using microwave heating at 140 °C and 1200 rpm for 15 min. Electrochemical and photochemical characterizations showed that small amounts of copper, such as 1.0%, enhanced the absorption of visible light, improved charge transfer, mitigated charge recombination, and increased the yield of products (acetone and methanol). Furthermore, the flat band potential of the catalyst modified with 1.0% of copper was located at a more negative potential than the unmodified sample, which favored the photocatalytic reduction of the CO2. As a result, the study achieved a 38-fold improvement in methanol generation (1373.5 µmol L−1 gcat−1) and a 62% increase in acetone formation (12.5 µmol L−1 gcat−1) under UV–Vis light incidence over 2 h of reaction at ambient pressure and temperature, compared to pure BiVO4 (36.3 µmol L−1 gcat−1 of methanol and 7.7 µmol L−1 gcat−1 of acetone).en
dc.description.affiliationDepartment of Chemistry Federal University of São Carlos, Rod. Washington Luiz, Km 235, SP
dc.description.affiliationFluminense Federal Institute of Education Science and Technology Campus Itaperuna, RJ
dc.description.affiliationInstitute of Chemistry - Araraquara UNESP Rua Francisco Degni, 55, Bairro Quitandinha, SP
dc.description.affiliationUnespInstitute of Chemistry - Araraquara UNESP Rua Francisco Degni, 55, Bairro Quitandinha, SP
dc.description.sponsorshipASCRS Research Foundation
dc.identifierhttp://dx.doi.org/10.1016/j.jphotochem.2023.114901
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry, v. 444.
dc.identifier.doi10.1016/j.jphotochem.2023.114901
dc.identifier.issn1010-6030
dc.identifier.scopus2-s2.0-85161357613
dc.identifier.urihttp://hdl.handle.net/11449/250041
dc.language.isoeng
dc.relation.ispartofJournal of Photochemistry and Photobiology A: Chemistry
dc.sourceScopus
dc.subjectCocatalyst
dc.subjectFuel production
dc.subjectGlobal warming
dc.subjectPhotosynthesis
dc.titleContribution of CuO on lamellar BiVO4/Bi2O3-based semiconductor for photoconversion of CO2en
dc.typeArtigo

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