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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Ferreira-Neto, Elias Paiva [1, 2] ; Ullah, Sajjad [2, 3, 4] ; Perissinotto, Amanda Pasquoto [1] ; de Vicente, Fabio S. [5] ; Lima Ribeiro, Sidney Jose [2] ; Worsley, Marcus Andre [6] ; Rodrigues-Filho, Ubirajara Pereira [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Sao Paulo State Univ UNESP, Inst Chem, BR-14800060 Araraquara, SP - Brazil
[3] Univ Peshawar, Inst Chem Sci, POB 25120, Peshawar - Pakistan
[4] Univ Fed Mato Grosso do Sul, Inst Phys, BR-79070900 Campo Grande, MS - Brazil
[5] Sao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Dept Phys, BR-13506970 Rio Claro, SP - Brazil
[6] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA 94550 - USA
Total Affiliations: 6
Document type: Journal article
Source: NEW JOURNAL OF CHEMISTRY; v. 45, n. 23, p. 10217-10231, JUN 21 2021.
Web of Science Citations: 0
Abstract

Hexavalent 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. (AU)

FAPESP's process: 16/10939-0 - TiO2 based nanostructured materials modified with Prussian Blue and Transition Metal Disulfides as photocatalysts for CO2 reduction
Grantee:Elias Paiva Ferreira Neto
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/24948-3 - CO2 Fixation by SiO2@TiO2 nanoparticles decorated with Iron Ferrocyanide (Prussian Blue) and Ruthenium Ferrocyanide: Toward high Sustainability of Biorefineries and Ammonia Synthesis Plants.
Grantee:Elias Paiva Ferreira Neto
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/19785-1 - CO2 as a raw material for hybrid multi-functional materials: improving the sustainability of industrial processes
Grantee:Ubirajara Pereira Rodrigues Filho
Support type: Research Program on Global Climate Change - Regular Grants
FAPESP's process: 18/01934-0 - Aerogels based on transition metal disulfides and bacterial cellulose: bifunctional nanomaterials with photocatalytic and adsorptive properties for environmental applications
Grantee:Elias Paiva Ferreira Neto
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/22828-6 - Pushing the boundaries of optical fibers: from photonics to optogenetics and environmental monitoring
Grantee:Younes Messaddeq
Support type: Research Projects - SPEC Program