In situ synthesis of three dimensional graphene-hydroxyapatite nano powders via hydrothermal process

Nosrati, Hassan; Sarraf-Mamoory, Rasoul; Dabir, Fatemeh; Pérez, María Canillas; Rodrı́guez, Miguel Á.; Le, Dang Quang Svend; Bünger, Cody

doi:10.1016/j.matchemphys.2018.10.023

Cited by 33 publications

(20 citation statements)

References 34 publications

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“…2D peak is related to the number of layers of the GNR located at 2700 cm −1 . The rGONR-related Raman signals in this spectrum are much clearer than the HA signal, although its weight percent in the powders is much lower [40][41][42][43][44]. Compared to peaks related to pure HA synthesized in the same way, some displacement is observed in these peaks, which is probably related to the applied gas pressure [63].…”

Section: Resultsmentioning

confidence: 99%

“…By comparing the GONR peaks with the final GNR-HA powders peaks, it is found that the bonds related to the oxygen-containing functional groups on the GONR surface have reduced well and some of the peaks have completely disappeared. The peaks at 1395 cm −1 and 1730 cm −1 are shifted upwards, indicating reduction of GONR, since these two peaks are characteristic of GONR [40][41][42][43][44][60][61][62].…”

Section: High-resolution Transmission Electron Microscopymentioning

confidence: 99%

“…Published research has also used materials such as graphene oxide. Graphene oxide is reduced by methods such as the hydrothermal process, and its mechanical properties are improved [43,44]. Unzipping the CNTs chemically also makes graphene oxide nanoribbons (GONRs) [42].…”

Section: Introductionmentioning

confidence: 99%

“…During the hydrothermal process, these primary powders dissolve at high temperatures and begin nucleation and growth of HA. Nucleation of HA crystals is formed on the surface agents of carbon nanomaterials by van der Waals forces [40,43,44]. In some published studies, ultrasound operations have been used to reduce the particles size of the synthesized HA [45].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Graphene Nanoribbons–Hydroxyapatite Nanocomposite Applicable in Biomedicine and Theranostics

Nosrati

Sarraf-Mamoory

Ahmadi

et al. 2020

JNT

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In order to investigate the effect of graphene nanoribbons on the final properties of hydroxyapatite-based nanocomposites, a solvothermal method was used at 180 °C and 5 h for the synthesis of graphene nanoribbons–hydroxyapatite nanopowders by employing hydrogen gas injection. Calcium nitrate tetrahydrate and diammonium hydrogenphosphate were used as calcium and phosphate precursors, respectively. To synthesize the powders, a solvent containing diethylene glycol, anhydrous ethanol, dimethylformamide, and water was used. Graphene oxide nanoribbons were synthesized by chemical unzipping of carbon nanotubes under oxidative conditions. The synthesized powders were consolidated by spark plasma sintering methodat 950 °C and a pressure of 50 MPa. The powders and sintered samples were then evaluated using X-ray diffraction, Raman spectroscopy, high-resolution transmission electron microscopy, Vickers microindentation techniques, and biocompatibility assay. The findings of this study showed that the final powders synthesized by the solvothermal method had calcium to phosphate ratio of about 1.67. By adding a small amount of graphene nanoribbon (0.5%W), elastic modulus and hardness of hydroxyapatite increased dramatically. In biological experiments, the difference of hydroxyapatite effect in comparison with the nanocomposite was not significant. The findings of this study showed that graphene nanoribbons have a positive effect on the properties of hydroxyapatite, and these findings would be useful for the medical and theranostic application of this type of nanocomposites.

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Section: Resultsmentioning

confidence: 99%

Section: High-resolution Transmission Electron Microscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of Graphene Nanoribbons–Hydroxyapatite Nanocomposite Applicable in Biomedicine and Theranostics

Nosrati

Sarraf-Mamoory

Ahmadi

et al. 2020

JNT

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“…Various methods, such as precipitation [13], hydrothermal/solvothermal technique [14], sol-gel synthesis [15], microwave method [16], biosynthesis [17], mechanochemical synthesis [18], double interfacial diffusion method [19], the surfactant-assisted approach [20], ultrasonic synthesis [21] have been developed to prepare HAP. To avoid mineral depletion, many natural resources have been processed to produce HAP.…”

mentioning

confidence: 99%

Removal of Copper(II) Ions from Aqueous Solutions by Hydroxyapatite-Based Materials Prepared from Eggshells

Simonescu¹,

Melinescu²,

Ciucä³

et al. 2019

Rev. Chim.

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The experimental study aimed to establish the potential applications of the nano- and micrometric powders of hydroxyapatite in the removal processes of Cu(II) ions from synthetic aqueous solutions. For this purpose, hydroxyapatite (HAP) was used in the form of: 1) nanometric powder (labeled nano-HAP), and 2) calcium alginate hydroxyapatite composite microparticles (nicro-HAP-CaAlg). Eggshells have been used as a raw material to obtain HAP. The contact time, pH and Cu(II) concentration in the initial solution have been the main process variables with influence on the Cu(II) ions removal by HAP samples. For both HAP based materials, an optimal pH value of 5 has been established. The nano-HAP powder has a higher Cu(II) adsorption capacity than micro-HAP-CaAlg based on the specific surface area values of nano- and micrometric powders. The adsorption isotherm experiments showed that this process can be described using Langmuir model according to which the adsorption takes place as a monolayer process on an homogeneous surface. The kinetic study revealed that the sorption process of Cu(II) from synthetic aqueous solutions can be described using the pseudo-second order kinetics model according to which the rate-determining step is chemisorption. The values of the retention capacity recommends both powders tested (nano-HAP and micro-HAP-CaAlg) to be used in the Cu(II) loaded water treatment process.

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A Comprehensive Review on Novel Graphene‐Hydroxyapatite Nanocomposites For Potential Bioimplant Applications

et al. 2023

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The advancements in medical treatment necessitated the development of advanced bio-implant materials for hard tissue replacement and bone regeneration. Hydroxyapatite (HA), an extreme bioresorbable material having physicochemical similarities with natural bone, seems to be a good bioimplant. Still, the ineffective mechanical properties, viz. fracture toughness, wear resistance, and tensile strength, restrict its practical utility in bioimplants. Recently, graphene-HA nanocomposites have been explored for potential bioimplant applications ascribed to their superior biocompatibility, bioactivity, osteoconductivity, and enhanced mechanical properties. The huge surface area with a two-dimensional sheet structure facilitates graphene's strong integration with HA, thus enhancing mechanical properties. These enhanced mechanical properties of graphene-HA nanocomposite are chiefly attributed to the pull-out, ridge growth, crack deflection, and grain bridging characteristics exhibited by graphene filler in the HA matrix. Further, graphene is neutral and biocompatible, thus improving the graphene-HA nanocomposite's biocompatibility. These qualities made this nanocomposite a rising star among bio-ceramic implant materials. This review presents the current scenario on the synthesis and mechanical and biological properties of graphene-hydroxyapatite nanocomposite, which seems to be a propitious material for implants in orthopaedic applications.

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In situ synthesis of three dimensional graphene-hydroxyapatite nano powders via hydrothermal process

Cited by 33 publications

References 34 publications

Synthesis of Graphene Nanoribbons–Hydroxyapatite Nanocomposite Applicable in Biomedicine and Theranostics

Synthesis of Graphene Nanoribbons–Hydroxyapatite Nanocomposite Applicable in Biomedicine and Theranostics

Removal of Copper(II) Ions from Aqueous Solutions by Hydroxyapatite-Based Materials Prepared from Eggshells

A Comprehensive Review on Novel Graphene‐Hydroxyapatite Nanocomposites For Potential Bioimplant Applications

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