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Silver deposition optimization process on ultrananocrystalline diamond applied to nitrate reduction.
Environ Technol. 2021 Jan; 42(4):640-647.ET

Abstract

Nitrate is a serious contaminant of ground and surface water, which cause high concern in the field of health and environmental protection. In this work, a ternary composite of silver/boron-doped ultrananocrystalline diamond/reticulated vitreous carbon (Ag/B-UNCD/RVC) was prepared and its electrocatalytic activity for nitrate reduction was examined. B-UNCD films were grown by hot filament chemical vapour deposition technique on RVC after a substrate seeding process improvement using 4 nm diamond powder. Compared to conventional 0.25 µm diamond seeding, this new procedure allowed uniform RVC coverage avoiding its etching process during diamond growth, in addition to obtaining more reproductive electrodes. In order to improve the catalytic effect of B-UNCD/RVC electrodes for nitrate reduction, silver deposition was performed on B-UNCD surface after oxidation for 10, 20 and 30 min in 0.5 mol L-1 H2SO4 solution using a potential of 2 V vs. Ag/AgCl. The most oxidized diamond film (30 min of oxidation) presented the highest silver deposit and particle adhesion. Thus the electrochemical response to nitrate of B-UNCD/RVC oxidized for 30 min was compared to that of RVC and B-UNCD/RVC electrodes showing the important Ag influence in the catalytic process.

Authors+Show Affiliations

Instituto nacional de Pesquisas Especiais - INPE, Granja, Brazil.Instituto nacional de Pesquisas Especiais - INPE, Granja, Brazil.Departamento de Materiais e Tecnologia, Univ Estadual Paulista (UNESP), Guaratinguetá, Brazil.Instituto nacional de Pesquisas Especiais - INPE, Granja, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31280684

Citation

Oishi, Silvia Sizuka, et al. "Silver Deposition Optimization Process On Ultrananocrystalline Diamond Applied to Nitrate Reduction." Environmental Technology, vol. 42, no. 4, 2021, pp. 640-647.
Oishi SS, Couto AB, Botelho EC, et al. Silver deposition optimization process on ultrananocrystalline diamond applied to nitrate reduction. Environ Technol. 2021;42(4):640-647.
Oishi, S. S., Couto, A. B., Botelho, E. C., & Ferreira, N. G. (2021). Silver deposition optimization process on ultrananocrystalline diamond applied to nitrate reduction. Environmental Technology, 42(4), 640-647. https://doi.org/10.1080/09593330.2019.1641558
Oishi SS, et al. Silver Deposition Optimization Process On Ultrananocrystalline Diamond Applied to Nitrate Reduction. Environ Technol. 2021;42(4):640-647. PubMed PMID: 31280684.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver deposition optimization process on ultrananocrystalline diamond applied to nitrate reduction. AU - Oishi,Silvia Sizuka, AU - Couto,Andrea Boldarini, AU - Botelho,Edson Cocchieri, AU - Ferreira,Neidenei Gomes, Y1 - 2019/07/17/ PY - 2019/7/10/pubmed PY - 2021/2/3/medline PY - 2019/7/9/entrez KW - Reticulated vitreous carbon KW - boron-doped ultrananocrystalline diamond KW - electrodeposition KW - nitrate KW - silver SP - 640 EP - 647 JF - Environmental technology JO - Environ Technol VL - 42 IS - 4 N2 - Nitrate is a serious contaminant of ground and surface water, which cause high concern in the field of health and environmental protection. In this work, a ternary composite of silver/boron-doped ultrananocrystalline diamond/reticulated vitreous carbon (Ag/B-UNCD/RVC) was prepared and its electrocatalytic activity for nitrate reduction was examined. B-UNCD films were grown by hot filament chemical vapour deposition technique on RVC after a substrate seeding process improvement using 4 nm diamond powder. Compared to conventional 0.25 µm diamond seeding, this new procedure allowed uniform RVC coverage avoiding its etching process during diamond growth, in addition to obtaining more reproductive electrodes. In order to improve the catalytic effect of B-UNCD/RVC electrodes for nitrate reduction, silver deposition was performed on B-UNCD surface after oxidation for 10, 20 and 30 min in 0.5 mol L-1 H2SO4 solution using a potential of 2 V vs. Ag/AgCl. The most oxidized diamond film (30 min of oxidation) presented the highest silver deposit and particle adhesion. Thus the electrochemical response to nitrate of B-UNCD/RVC oxidized for 30 min was compared to that of RVC and B-UNCD/RVC electrodes showing the important Ag influence in the catalytic process. SN - 1479-487X UR - https://www.unboundmedicine.com/medline/citation/31280684/Silver_deposition_optimization_process_on_ultrananocrystalline_diamond_applied_to_nitrate_reduction_ L2 - https://www.tandfonline.com/doi/full/10.1080/09593330.2019.1641558 DB - PRIME DP - Unbound Medicine ER -
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