Electrochemical synthesis of nanosized hydroxyapatite

Montero, Mavis L.; Sáenz, Alejandro; Rodriguez, J Gallegos; Arenas, Jesús; Castaño, V. M.

doi:10.1007/s10853-006-5231-x

Cited by 18 publications

(19 citation statements)

References 19 publications

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“…Smaller sized particles of HA might be prepared by a pyrosol technique, where an aerosol containing calcium and orthophosphate ions in the adequate ratio is transported to a furnace where the pyrolisis takes place 361 . Synthesis of nano-sized HA has also been described in references 362 and 363, while the chronological development of nano-sized HA synthesis might be found in another paper 364 . Two-dimensional nanocrystalline HA might be also synthesized 365 .…”

Section: The Members Of the Calcium Orthophosphate Familymentioning

confidence: 99%

Calcium orthophosphates

2011

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The present overview is intended to point the readers’ attention to the important subject of calcium orthophosphates. This type of materials is of special significance for human beings, because they represent the inorganic part of major normal (bones, teeth and antlers) and pathological (i.e., those appearing due to various diseases) calcified tissues of mammals. For example, atherosclerosis results in blood vessel blockage caused by a solid composite of cholesterol with calcium orthophosphates, while dental caries and osteoporosis mean a partial decalcification of teeth and bones, respectively, that results in replacement of a less soluble and harder biological apatite by more soluble and softer calcium hydrogenphosphates. Therefore, the processes of both normal and pathological calcifications are just an in vivo crystallization of calcium orthophosphates. Similarly, dental caries and osteoporosis might be considered an in vivo dissolution of calcium orthophosphates. Thus, calcium orthophosphates hold a great significance for humankind, and in this paper, an overview on the current knowledge on this subject is provided.

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Section: The Members Of the Calcium Orthophosphate Familymentioning

confidence: 99%

Calcium orthophosphates

2011

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“…Hydroxyapatite was synthesized by the electrochemical method as previously reported [26]. Briefly, a calcium/EDTA/phosphate aqueous solution (0.25M/0.25M/0.15 M, respectively) was electrolysed at 149 mA/cm 2 for 4 hours.…”

Section: Nano-hap Coating Of Ps By Cathodic Biasmentioning

confidence: 99%

“…Our group has previously reported the synthesis of nanosized hydroxyapatite by electrolysis of a homogenous solution of Ca +2 /(ethylenediaminetetraacetic acid) EDTA/ PO 4 -3 [26]. This occurs by the electrolytic oxidation of Ca-EDTA complex, which produces nano-Hap crystal sizes ranging between 15 and 20 nm [27].…”

Section: Introductionmentioning

confidence: 99%

Nano‐hydroxyapatite colloid suspension coated on chemically modified porous silicon by cathodic bias: a suitable surface for cell culture

Sánchez

González

Garcı́a-Piñeres

et al. 2010

Phys. Status Solidi C

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The properties of porous silicon make it an interesting material for biological applications. However, porous silicon is not an appropriate surface for cell growth. Surface modification is an alternative that could afford a bioactive material. In this work, we report a method to yield materials by modification of the porous silicon surface with hydroxyapatite of nanometric dimensions, produced using an electrochemical process and coated on macroporous silicon substrates by cathodic bias. The chemical nature of the calcium phosphate deposited on the substrates after the experimental process and the amount of cell growth on these surfaces were characterized. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Several methods have been developed to produce HA powders, including chemical precipitation [1,2], hydrothermal [3,4], emulsion [5], sol-gel [6] and mechano-chemical [7] methods. The electrochemical method is beginning to emerge as a valuable option for preparing HA powders [8,9]. Using the electrochemical method, the particle size can be controlled easily by simply adjusting the imposed current or potential of the system [10,11].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Processes for the Formation of Hydroxyapatite Powders

Nur

Setyawan

Widjaja

et al. 2014

Bull. Chem. React. Eng. Catal.

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Electrochemical synthesis of hydroxyapatite particles was performed from a homogeneous solution of Na2H2EDTA.2H2O, KH2PO4 and CaCl2 without stirring to investigate the mechanism of hydroxyapatite formation. We found that OHions generated by water reduction at the cathode play an important role in the formation of hydroxyapatite particles. The OHions induce the liberation of Ca 2+ ions and the dissociation of phosphoric acid, which serve as the reactants for the formation of hydroxyapatite particles. Two layers with a clear boundary were formed during electrolysis. The upper layer comprises the produced particles and the lower layer is a homogeneous solution. The produced particles were held in the region between the electrodes mainly due to the electrostatic interactions of charged particles in an electric field. The hydroxyapatite particles are agglomerates consisting of spherical particles. Aging the suspension for 24 h after electrolysis leads to the transformation of hydroxyapatite to brushite. Thus, if producing hydroxyapatite is desired, the particles should be continuously removed from the system. This method appears to be promising as a continuous process to produce hydroxyapatite particles using an electrochemical method.

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Electrochemical synthesis of nanosized hydroxyapatite

Cited by 18 publications

References 19 publications

Calcium orthophosphates

Calcium orthophosphates

Nano‐hydroxyapatite colloid suspension coated on chemically modified porous silicon by cathodic bias: a suitable surface for cell culture

Electrochemical Processes for the Formation of Hydroxyapatite Powders

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