Please use this identifier to cite or link to this item: https://repository.usc.edu.co/handle/20.500.12421/282
Title: Effect of substrate nature on the electrochemical deposition of calcium-deficient hydroxyapatites
Authors: Gualdrón-Reyes, A. F.
Domínguez-Vélez, V.
Morales-Morales, Jimmy Alexander
Cabanzo, Rafael
Meléndez, A. M.
Keywords: Calcium;Coatings;Deposition;Electrodes;Hydroxyapatite;Electrochemical behaviors;Linear sweep voltammetry;Sol-gel dip-coating method;Stainless steel electrode;Sol-gels;Calcium phosphate
Issue Date: 25-Jan-2017
Publisher: Institute of Physics Publishing
Abstract: Calcium phosphates were obtained by reducing nitrate ions to produce hydroxide ions on TiO2/stainless steel and TiO2/titanium electrodes. TiO2 coatings on metallic substrates were prepared by sol-gel dip-coating method. The morphology of deposits was observed by FESEM. Chemical nature of calcium phosphate deposits was identified by Raman micro-spectroscopy and FESEM/EDS microanalysis. Electrochemical behavior of nitrate and nitrite reduction on stainless steel and titanium electrodes was studied by linear sweep voltammetry. In addition, voltammetric study of the calcium phosphate electrodeposition on both electrodes was performed. From these measurements was selected the potential to form a calcium phosphate. A catalytic current associated to nitrate reduction reaction was obtained for stainless steel electrode, leading to significant deposition of calcium phosphate. Ca/P ratio for both substrates was less than 1.67. The formation of calcium deficient hydroxyapatite was confirmed by Raman spectroscopy. © Published under licence by IOP Publishing Ltd.
URI: https://repository.usc.edu.co/handle/20.500.12421/282
ISSN: 17426588
Appears in Collections:Artículos Científicos



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