Thermal and structural characterization of synthetic and natural nanocrystalline hydroxyapatite

Sofronia, Ancuta; Baies, Radu; Anghel, Elena Maria; Marinescu, Cornelia; Tănăsescu, Speranţa

doi:10.1016/j.msec.2014.07.023

Cited by 151 publications

(93 citation statements)

References 35 publications

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“…Carbonate ions can be hosted in HA structure by the substitution of phosphate or hydroxyl groups [30,31]. These peaks are disappeared with the heat treatment, and only crystalline HA phase withstands to the heat treatment up to 1000°C [24]. Whole mentioned molecules are an evidence of non-stoichiometric HA structure which is produced by precipitation method.…”

Section: Resultsmentioning

confidence: 99%

“…The third part of mass loss over 600°C was attributed to both decarbonization and dehydroxylation processes. Dehydroxylation of HA starts at about 900°C, and gradual dehydroxylation leads to the decomposition of HA to oxyhydroxyapatite [22,24,32,[37][38][39]. The effect of Sr on the thermal behavior of HA was usually evaluated with XRD and FTIR.…”

Section: Resultsmentioning

confidence: 99%

“…Strontium could be substituted with calcium in the whole range of composition in the HA structure [15][16][17][18][19][20]. Until this time, substitutions in HA have been made in order to assimilate the structure to chemical composition of the natural bone, improving biological, mechanical and antibacterial properties or decreasing solubility [11,[20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of strontium-doped hydroxyapatite for biomedical applications

Özbek

Baştan

Üstel

2016

J Therm Anal Calorim

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The aim of this study was to investigate the effect of strontium (Sr) doping into hydroxyapatite (HA) powders. It is well known that strontium promotes bone formation, reduces bone resorption and it is used to treat osteoporotic diseases as stated previously by researchers. Strontium-doped HA (Sr-HA) was produced by precipitation with increasing amount of ion exchange between calcium (Ca) and Sr. Two different Sr amounts as 2 and 4 mol% were doped into HA by adding Sr(NO 3 ) 2 to the reaction solution. The precipitated HA was separated from supernatant after the vacuum filtration. The filtered wet cake of HA was exposed to spray drying and calcined in an air furnace at 1200°C. The produced-HA powders were analyzed by using SEM, FTIR, XRD and TG-DSC techniques. At the end of the study, the results showed that decomposition of HA to tri-calcium phosphate increases with increasing Sr content. Thermal analyses revealed that Sr-doped HA powders loose more mass than pure HA powders.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of strontium-doped hydroxyapatite for biomedical applications

Özbek

Baştan

Üstel

2016

J Therm Anal Calorim

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“…For the calcined samples, there were three main peaks, namely 211, 112 and 300 planes at 2θ near 31.8°, 32.2° and 32.9°, respectively [19,20]. It was evident that the intensity of diffraction peaks increased with the calcination temperature [21]. Heating at a temperature of 900°C resulted in broad diffraction peaks which coincided with a poor crystalline apatite.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 93%

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Hammood¹,

Hassan²,

Alkhafagy³

2017

Nano BioMed ENG

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Hydroxyapatite (HAp) is one of the vital and bioactive materials that are commonly used in biomedical field and concentrated in clinical area. It is a bio-ceramic powder synthesized by using different bio-waste materials such as bovine femur bone. In this study, the bovine femur bone powder was prepared to obtain nano powder. The purpose of this study was to reach the optimal temperature to obtain nanoparticles HAp. The resulted powder was calcinated in a furnace at different temperatures (900, 950, 1000, 1050 and 1100 °C) for 2 h at the heating rate of 10 °C/min and cooled slowly in a furnace. Results showed, the formation of pure HAp by the presence of peaks corresponding to (PO 4 ) 3-at 632/cm and OH -at 3,572/cm in fourier transformation infrared spectroscopy (FTIR). For the calcined samples, there were three main peaks of 211, 112 and 300 planes at 2θ near 31.8, 32.2 and 32.9 respectively. The amorphous raw bones were transformed into crystalline phase and the lattice parameters for HAp c and a were calculated in X-ray diffraction (XRD), Raman analysis showed that the calcination process removed the organic compound from the bovine femur bones matrix. Scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) showed that the shape of the granules was irregular, containing quantities of oxygen, magnesium, sodium and carbon; the ratio of calcium to phosphate was calculated, Atomic force microscopy (AFM) showed that the particles sizes ranged from nanometers to microns. EDX result found that the calcium to phosphate ratio reached 1.7058 after calcination at 950 °C which was close to stoichiometric hydroxyapatite (1.67). This result implied the formation of pure HAp phase at 950 °C.

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“…Hydroxyapatite (HAP), with a chemical formula of Ca 10 (PO 4 ) 6 (OH) 2 , is one of constituent that had found in either in human bone or teeth and the major elements are including calcium and phosphorous. HAp is derived from natural materials such as fish bone (Jensen et al, 1996;Ozawa and Kanahara, 2005) and fish scale (Mondal et al, 2010;Zainon et al, 2012), bovine sources (Sofronia et al, 2014). Bovine and pork origins are often associated with disease transmission and religious sentiments (Gómez-Guillén et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Extraction, Characterization and Antimicrobial Activity of Hydroxyapatite From Seabass and Seabream Scale

Alparslan¹

2017

J Food Health Sci

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Abstract:The present study investigates the characterization of hydroxyapatite (HAp) extracted from seabass and seabream scales as by-product. Fish scales obtained from a seafood processing company were used to extract natural HAp powder. HAp powder was extracted by alkaline heat treatment of fish scales and the synthesized HAp (FS-HAp) was extensively characterized with Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Calcium to phosphate ratio of the HAp was confirmed by inductively coupled plasma (ICP) and elemental analysis of HAp were also carried out using energy dispersive x-ray spectroscopy (EDS). The results of the characterization analysis were compared with commercial hydroxyapatite standard (CHAp) and it was clearly confirmed that the extracted FS-HAp exactly showed CHAp characteristics physicochemically which is used as biomaterial. However, well diffusion assay revealed out that synthesized hydroxyapatite showed no activity against C. albicans, S. aureus and E. coli. It was concluded that, instead of synthetic apatite, extracted FS-HAp presents a potential promising biomaterial as the raw materials are by-product which economically cheap and sustainable substances.

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Thermal and structural characterization of synthetic and natural nanocrystalline hydroxyapatite

Cited by 151 publications

References 35 publications

Synthesis and characterization of strontium-doped hydroxyapatite for biomedical applications

Synthesis and characterization of strontium-doped hydroxyapatite for biomedical applications

Access to Optimal Calcination Temperature for Nanoparticle Synthesis from Hydroxyapatite Bovine Femur Bone Waste

Extraction, Characterization and Antimicrobial Activity of Hydroxyapatite From Seabass and Seabream Scale

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