Broad spectrum photocatalytic system based on BiVO4 and NaYbF4:Tm3+ upconversion particles for environmental remediation under UV-vis-NIR illumination

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dc.contributor.authorUllah, S. [UNESP]
dc.contributor.authorFerreira-Neto, E. P. [UNESP]
dc.contributor.authorHazra, C. [UNESP]
dc.contributor.authorParveen, R.
dc.contributor.authorRojas-Mantilla, H. D. [UNESP]
dc.contributor.authorCalegaro, M. L.
dc.contributor.authorSerge-Correales, Y. E. [UNESP]
dc.contributor.authorRodrigues-Filho, U. P.
dc.contributor.authorRibeiro, S. J.L. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Peshawar
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2019-10-06T15:22:01Z
dc.date.available2019-10-06T15:22:01Z
dc.date.issued2019-04-01
dc.description.abstractThe development of photocatalysts responsive towards a broader region of the solar (UV-to-NIR) light is important for efficient harvesting of sunlight for photochemical and photoelectrical applications. In this study, two photocatalytic systems (BV/LEDs and BV/UCPs where UCPs stands for NaYbF4:Tm3+ upconversion particles) based on bismuth vanadate (BV) are introduced for photocatalytic degradation of both organic dyes (crystal violet, CV) and pharmaceuticals (sulfathiazole, STZ) under a variety of photoactivation modes including low-power (1.26 W) LEDs and near infrared (NIR) irradiation as well as natural sunlight. The BV/LEDs system makes use of the perfect match between the emission profile of commercial blue LEDs (460 ± 10 nm) and absorption profile of BV (Eg = 2.6 eV) to effectively photodegrade pollutants. The BV/UCPs system, on the other hand, exploits the NIR-to-UV/visible upconverted light from UCPs to allow photodegradation of pollutants under NIR illumination. Moreover, we present a detailed study of the experimental parameters to obtain BV particles with tailored morphology (spherical, rod-like, hyperbranched), crystalline phase (monoclinic, tetragonal or heterojunction biphasic BV) and band gap energy (2.4–2.9 eV). Depending on the phase composition, a synergetic effect in photoactivity is observed in samples containing around 68% monoclinic and 30% tetragonal BV which is ascribed to the formation of monoclinic/tetragonal heterojunction.en
dc.description.affiliationInstitute of Chemistry São Paulo State University (UNESP), PO Box 355
dc.description.affiliationInstitute of Chemical Sciences University of Peshawar, PO Box 25120
dc.description.affiliationInstitute of Chemistry of São Carlos University of São Paulo
dc.description.affiliationUnespInstitute of Chemistry São Paulo State University (UNESP), PO Box 355
dc.format.extent121-135
dc.identifierhttp://dx.doi.org/10.1016/j.apcatb.2018.09.091
dc.identifier.citationApplied Catalysis B: Environmental, v. 243, p. 121-135, 2019.
dc.identifier.doi10.1016/j.apcatb.2018.09.091
dc.identifier.issn0926-3373
dc.identifier.lattes0253918004801724
dc.identifier.lattes4303802780216754
dc.identifier.lattes4692488228477706
dc.identifier.lattes8468076627472175
dc.identifier.lattes6446047463034654
dc.identifier.orcid0000-0001-9931-690X
dc.identifier.orcid0000-0002-9810-7564
dc.identifier.orcid0000-0002-9555-5046
dc.identifier.orcid0000-0003-3286-9440
dc.identifier.scopus2-s2.0-85055214518
dc.identifier.urihttp://hdl.handle.net/11449/186986
dc.language.isoeng
dc.relation.ispartofApplied Catalysis B: Environmental
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBismuth vanadateen
dc.subjectHeterojunctionen
dc.subjectMicrowave-methoden
dc.subjectUpconversionen
dc.subjectUV–vis-NIR photocatalysisen
dc.titleBroad spectrum photocatalytic system based on BiVO4 and NaYbF4:Tm3+ upconversion particles for environmental remediation under UV-vis-NIR illuminationen
dc.typeArtigo

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