Synthesis and characterisation of nanohydroxyapatite using an ultrasound assisted method

Poinern, Gérrard Eddy Jai; Brundavanam, Ravi Krishna; Mondinos, Nicholas; Jiang, Zhong Tao

doi:10.1016/j.ultsonch.2009.01.007

Cited by 151 publications

(96 citation statements)

References 48 publications

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“…The average size range of Gel-HAP particles, over the set of gelatin concentration and temperature range, is 32 nm (± 5%). This is in excellent agreement with previous synthesis of nano HAP particle using a low power ultrasound assisted method [36] only these samples have gelatine incorporated in the nano HAP phase. Figure 2 presents the FT-IR spectra of pure HAP and Gel-HAP (2 ml, 40 ml, 100 ml Gel.…”

Section: Resultssupporting

confidence: 92%

“…In addition, a recent study by Ethirajan et al in 2008 has shown the value of using high-powered ultrasounds in combination with a high concentrated solution of gelatine to generate GEL-HAP nanospheres by a reverse micellar method [35]. In 2009, Poinern et al [36] investigations into nano HAP indicated that the size, crystal structure and morphology of pure Nano-HAP spheroids were enhanced by the use of low power ultrasonic irradiation in the synthesis process.…”

Section: Introductionmentioning

confidence: 99%

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Effect of dilute gelatine on the ultrasonic thermally assisted synthesis of nano hydroxyapatite

Brundavanam

Jiang

Chapman

et al. 2011

Ultrasonics Sonochemistry

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Accepted ManuscriptThis is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Effect of Dilute Gelatine on the Ultrasonic Thermally AbstractA series of nano hydroxyapatite-gelatin composites with different dilute solutions of gelatin concentrations were synthesized by a thermally assisted low power ultrasonic irradiation method.The gelatine hydroxyapatite, (Gel-HAP) nanoparticles were prepared using Ca(NO 3 ) 2 and KH 2 PO 4 in the presence of gelatine in an aqueous solution. The synthesised products were heat treated between 100°C and 400°C. The effect of the addition of gelatin on the nucleation and growth of synthesised nano HAP was investigated. Characterisation was performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and Fourier transform infrared spectroscopy (FT-IR). The characterisation results indicate that gelatin has been appended to the nano HAP forming regular spherical shaped crystals of nano sized Gel-HAP.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of dilute gelatine on the ultrasonic thermally assisted synthesis of nano hydroxyapatite

Brundavanam

Jiang

Chapman

et al. 2011

Ultrasonics Sonochemistry

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“…However, a decrease of particle dimension is also observed with pure HAp particles prepared using HNO 3 after a similar ultrasound treatment. Several previous reports have demonstrated the ability of ultrasound to tune HAp particle size but these studies were devoted to particle growth from Ca 2+ and phosphate salts [13][14][15][16][17][18][19][20][21] and often describes a continuous process occurring from an amorphous calcium phosphate phase to crystalline HAp. In these works, decrease of particle size upon irradiation was attributed to the formation of hot spots resulting from cavitation bubbles collapse that favor nucleation events.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore many physical and chemical routes have been developed to obtain phosphocalcic apatites as high surface area powders from inorganic salts [12]. Of particular interest here are sonochemistry routes that allow control of the particle size and crystallinity through the modulation of irradiation power and duration [13][14][15][16][17][18][19][20][21]. As a more sustainable alternative, a process allowing for the conversion of natural phosphate into porous hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) was recently described [22,23].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale conversion of chlorapatite into hydroxyapatite using ultrasound irradiation

Bouyarmane

Gouza

Masse

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Abstract:The ultrasound-assisted conversion of chlorapatite nanoparticles obtained from a natural phosphate rock into hydroxyapatite nanocrystals was achieved within one hour. The process had no significant impact on particle crystallinity but led to a significant decrease of the colloidal size. Similar variations were obtained for hydroxyapatite nanoparticles treated in the same conditions, suggesting that these variations are not due to the compositional modification. Analyses of the solubility properties of the two phases and of the ionic contents of the reaction medium suggest that the undersaturated conditions of the reaction and the cavitation phenomena favor surface exchange and erosion mechanisms over bulk amorphization.

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“…[8][9][10] Recently, the effects of ultrasound have also been investigated for different cases involving polymerization reactions and the syntheses of various amorphous and crystalline materials. Although, the benefit of using ultrasonic irradiation was confirmed, in some cases, as promising tools to assist the synthetic reactions to prepare fine ceramic powders, inorganic materials and catalysts, [11][12][13][14] the reaction mechanism in the aqueous suspensions is not fully understood.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Synthesis of Zeolite A from Metakaolinite in NaOH Solution

2010

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Sonochemical synthesis of zeolite A has been conducted by ultrasonic irradiation of mixtures of metakaolinite and NaOH solution. The hydrothermal synthesis at conventional synthesis conditions was undertaken to determine the sonochemical reliability. The enhancement of nucleation and crystallization rate of zeolite A was achieved by ultrasound. In the ultrasonic field, zeolite A once formed in the suspension has been converted into hydroxysodalite and losod as sonicating proceeded. Comparing the results with those of conventional methods, this heterogeneous reaction was particularly accelerated by ultrasound, leading to improved reactivity of solid reactant through intensive mixing. The use of ultrasound enables us to prepare well-dispersed fine zeolite A particles with mean particle size of around 1 mm. The cation exchange capacity values of the products increased as the synthesis reaction for zeolite A proceeded. The high solid concentration in the suspension, however, hindered the ultrasound from intense agitating, resulting in the decrease of zeolite A yield.

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Synthesis and characterisation of nanohydroxyapatite using an ultrasound assisted method

Cited by 151 publications

References 48 publications

Effect of dilute gelatine on the ultrasonic thermally assisted synthesis of nano hydroxyapatite

Effect of dilute gelatine on the ultrasonic thermally assisted synthesis of nano hydroxyapatite

Nanoscale conversion of chlorapatite into hydroxyapatite using ultrasound irradiation

Sonochemical Synthesis of Zeolite A from Metakaolinite in NaOH Solution

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