Synthesis and characterization of nanocrystalline hydroxyapatite and biphasic calcium phosphate using Ca(OH)2 and (NH4)H2PO4

Unabia, Romnick B.; Piagola, Joy Cristy; Guerrero, John Robert; Vequizo, Reynaldo M.; Gambe, Jess; Odarve, Majvell Kay G.; Sambo, Bianca Rae B.

doi:10.1002/pssc.201400319

Cited by 6 publications

(4 citation statements)

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“…where (300) is the intensity at (300) peak and ( 112 300 ⁄ ) is the intensity of a valley between (112) peak and (300) peak [20,21].…”

Section: Coatingscharacterizationmentioning

confidence: 99%

“…Where β is the integral broadening of the peaks in radians, θ is the Bragg angle, λ is the wavelength of the radiation, τ is the effective crystallite size and ε is the effective strain [21][22]. The planes used for the calculations are (002), (211), (112), (300), (202), (310), (222) and (213).…”

Section: Coatingscharacterizationmentioning

confidence: 99%

“…Due to the abundant presence of peaks, the unit cell refinement of the HA phase was performed using a full pattern matching with the Rietveld method [21] using JANA 2006 software [24]. In all cases, the refinements were performed using the phases observed including the impurities present in the samples.…”

Section: Coatingscharacterizationmentioning

confidence: 99%

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Investigation on the structural and microstructural properties of copper-doped hydroxyapatite coatings deposited using solution precursor plasma spraying

Unabia

Bonebeau

Candidato

et al. 2019

Journal of the European Ceramic Society

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Structural and microstructural investigation on solution precursor plasma sprayed copperdoped hydroxyapatite (Cu-HA) coatings with0, 3, 5 and 10 weight percent (wt.%) of Cu dopant concentration is presented. Scanning electron micrographs show no significant morphological changes at the surface and cross-section of the coatings as copper content increases. X-ray diffraction results show decreases in the HA phase content from 93% to 14% and degree of crystallinity form 94% to 85% along with the increase of impurity phases upon increasing the copper concentration. RAMAN and IR spectra depicted broadening and red-shifting of the phosphate bands due to the distortion of the HA structure induced by the insertion of the copper ions into the HA lattice. X-ray photoelectron spectroscopy results identified that the copper species incorporated in HA structure was Cu + and Cu 2+ ions. Incorporation of copper ions into HA was associated to an interstitial insertion along hexagonal channel of the HA structure which leads to the increase in the lattice a parameter and expansion of the unit cell volume observed in Rietveld refinement measurements. The insertion was induced by the dehydroxylation process of HA due to the high temperatures of the plasma jet. Furthermore, the dopant concentration limitation in order to maintain the dominance of HA phase in the coating is 5 wt.% of Cu.

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“…where (300) is the intensity at (300) peak and ( 112 300 ⁄ ) is the intensity of a valley between (112) peak and (300) peak [20,21].…”

Section: Coatingscharacterizationmentioning

confidence: 99%

Section: Coatingscharacterizationmentioning

confidence: 99%

See 1 more Smart Citation

Investigation on the structural and microstructural properties of copper-doped hydroxyapatite coatings deposited using solution precursor plasma spraying

Unabia

Bonebeau

Candidato

et al. 2019

Journal of the European Ceramic Society

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“…The procedures to synthesize CaP nanoparticles were conducted according to Unabia et al [21] with slight modification. The CaO powders were dissolved in distilled water at 40 o C under stirring condition to form calcium hydroxide (CaOH).…”

Section: Sample Preparationmentioning

confidence: 99%

Fabrication of Poly(lactic-Co-Glycolic Acid)/Calcium Phosphate Bone Cement Composite: Synthesization of Calcium Phosphate From Crab Shells

et al. 2018

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Crab shells are waste product, rich with calcium compound. Calcium element is often used as a material for bone scaffold due to its bioactive and biodegradation properties. In this study, calcium phosphate (CaP) nanoparticles were synthesized from crab shells through a wet chemical route. The CaP nanoparticles were then sintered and mixed with poly(lactic-co-glycolic acid) (PLGA) to form a bone cement composite. The mixture was casted in a cylinder shape and it was characterized through ATR-FTIR, XRD, FESEM, contact angle and DSC analyses. The CaP pellet and the CaP/PLGA bone cement composite were then subjected to in vitro simulated body fluid (SBF) bioactivity test. The CaP/PLGA bone cement composite was found to have a composition of crystal CaP and PLGA with a tolerable glass transition state, suitable to be used in a physiological environment. The CaP nanoparticles were agglomerated on the 3D interconnected surface of PLGA. The hydrophobicity of the CaP was increased (66.94%) with the addition of PLGA as a binder matrix where this composite has induced the formation of apatite layer. This bioactive property is crucial in fabricating a bone substitute material as it can promotes cell penetration, attachment and proliferation..

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Heavy Metals Removal Using Nano‐Hydroxyapatite Extracted from Cattle Bones

Aissa

Othmani

2023

ChemistrySelect

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Local cattle (lamb and camel) bones were used as a starting material to obtain pure nano‐hydroxyapatite n‐HAp. Extraction of nano‐HAp is done at 700 °C and 900 °C calcination temperatures, followed by some characterization technics such as FTIR spectroscopy, UV‐visible spectroscopy, XRD diffraction pattern, SEM and EDX analyzes. All the technics used have confirmed that calcination at these temperatures leads to a material in which pure hydroxyapatite is the only crystallographic phase. The heavy metals removal capacity of n‐HAp applied to Cu2+ and Co2+ from aqueous solutions was exanimated and compared. The obtained results were interpreted and compared based on; (i) the calcination temperature, (ii) the nature of the adsorbed cation on the nano‐hydroxyapatite surface and (iii) the nature of the adsorbent.

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Synthesis and characterization of nanocrystalline hydroxyapatite and biphasic calcium phosphate using Ca(OH)₂ and (NH₄)H₂PO₄

Cited by 6 publications

References 0 publications

Investigation on the structural and microstructural properties of copper-doped hydroxyapatite coatings deposited using solution precursor plasma spraying

Investigation on the structural and microstructural properties of copper-doped hydroxyapatite coatings deposited using solution precursor plasma spraying

Fabrication of Poly(lactic-Co-Glycolic Acid)/Calcium Phosphate Bone Cement Composite: Synthesization of Calcium Phosphate From Crab Shells

Heavy Metals Removal Using Nano‐Hydroxyapatite Extracted from Cattle Bones

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