Prussian blue as a co-catalyst for enhanced Cr(vi) photocatalytic reduction promoted by titania-based nanoparticles and aerogels

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Peshawar-
Autor(es): dc.contributorUniversidade Federal de Mato Grosso do Sul (UFMS)-
Autor(es): dc.contributorLawrence Livermore Natl Lab-
Autor(es): dc.creatorFerreira-Neto, Elias Paiva [UNESP]-
Autor(es): dc.creatorUllah, Sajjad [UNESP]-
Autor(es): dc.creatorPerissinotto, Amanda Pasquoto-
Autor(es): dc.creatorVicente, Fabio S. de [UNESP]-
Autor(es): dc.creatorLima Ribeiro, Sidney Jose [UNESP]-
Autor(es): dc.creatorWorsley, Marcus Andre-
Autor(es): dc.creatorRodrigues-Filho, Ubirajara Pereira-
Data de aceite: dc.date.accessioned2022-02-22T00:59:33Z-
Data de disponibilização: dc.date.available2022-02-22T00:59:33Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-04-26-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d1nj01141c-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/210344-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/210344-
Descrição: dc.descriptionHexavalent chromium (Cr(vi)) is an noxious and highly toxic heavy metal that presents a serious threat to human health if present even in low concentrations in drinking water. Photocatalytic reduction of Cr(vi) to its less toxic Cr(iii) state is a potential strategy to combat Cr(vi) pollution, but the efficiency of the process is low, especially in the absence of hole scavenger organic reagents. To address this issue and prepare efficient photocatalysts for Cr(vi) removal from water, in this study, we explored Prussian blue (PB) as a co-catalyst for improving the photoreduction performance of different high surface area TiO2-based materials (titania or silica-titania nanoparticles and aerogels). The photocatalyst nanomaterials were surface-modified with nanocrystalline PB using the photodeposition route. The PB layer acts as an effective electron acceptor/mediator between the semiconductor photocatalyst and Cr(vi) species. All the PB-modified photocatalysts exhibit higher photocatalytic activity (up to 9 times faster) as compared to the unmodified photocatalysts towards reduction of Cr(vi). Importantly, the PB-modified photocatalysts exhibited high photocatalytic performance (98-99% reduction in 40 min for pH = 5.6 and in 10 min for pH = 3) without addition of organic reagents. The simple approach reported herein can be followed to prepare new PB-photocatalyst systems with improved photocatalytic performance towards Cr(vi) reduction and other target applications.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionU.S. Department of Energy by Lawrence Livermore National Laboratory-
Descrição: dc.descriptionHigher Education Commission, Pakistan-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionUniv Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Inst Chem, BR-14800060 Araraquara, SP, Brazil-
Descrição: dc.descriptionUniv Peshawar, Inst Chem Sci, POB 25120, Peshawar, Pakistan-
Descrição: dc.descriptionUniv Fed Mato Grosso do Sul, Inst Phys, BR-79070900 Campo Grande, MS, Brazil-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Dept Phys, BR-13506970 Rio Claro, SP, Brazil-
Descrição: dc.descriptionLawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 USA-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Inst Chem, BR-14800060 Araraquara, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Dept Phys, BR-13506970 Rio Claro, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2013/24948-3-
Descrição: dc.descriptionFAPESP: 2015/22828-6-
Descrição: dc.descriptionFAPESP: 2016/10939-0-
Descrição: dc.descriptionFAPESP: 2018/01934-0-
Descrição: dc.descriptionFAPESP: 2018/19785-1-
Descrição: dc.descriptionU.S. Department of Energy by Lawrence Livermore National Laboratory: DEAC52-07NA27344-
Descrição: dc.descriptionHigher Education Commission, Pakistan: 9286-
Formato: dc.format15-
Idioma: dc.languageen-
Publicador: dc.publisherRoyal Soc Chemistry-
Relação: dc.relationNew Journal Of Chemistry-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titlePrussian blue as a co-catalyst for enhanced Cr(vi) photocatalytic reduction promoted by titania-based nanoparticles and aerogels-
Tipo de arquivo: dc.typelivro digital-
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