Effect of temperature on crystallite size of hydroxyapatite powders obtained by wet precipitation process

Méndez-Lozano, Néstor; Apátiga-Castro, Miguel; Soto, Karen M.; Manzano-Ramı́rez, A.; Zamora-Antuñano, Marco Antonio; González-Gutiérrez, Carlos Alberto

doi:10.1016/j.jscs.2022.101513

Cited by 13 publications

(8 citation statements)

References 21 publications

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“…The FTIR spectra present similarly to those reported for hydroxyapatite [ 34 ]. In agreement with previous studies, the FTIR studies of silver-doped hydroxyapatite powders show no evidence of a change in crystalline structure [ 35 ].…”

Section: Resultssupporting

confidence: 76%

Characterization and Evaluation of Silver Concentrations in Hydroxyapatite Powders

Méndez-Lozano,

Apatiga-Castro,

Ruíz-Baltazar

et al. 2023

JFB

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The goal of this study is to evaluate the influence of the concentration of silver on the structural and antimicrobial in vitro properties of silver-doped hydroxyapatite powders obtained using the precipitation method. Different concentrations of silver were evaluated to assess the antimicrobial properties. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), and dispersive energy spectroscopy (EDS) were used to characterize the powders. XRD and FTIR showed that the hydroxyapatite structure is not affected by the incorporation of silver; on the other hand, EDS showed the presence of silver in the powders. Antibacterial studies showed the efficiency of hydroxyapatite powders in inhibiting bacterial growth as silver concentration increases. According to the results, silver-doped hydroxyapatite powders are suggested for use in the prevention and treatment of infections in bone and dental tissues.

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Section: Resultssupporting

confidence: 76%

Characterization and Evaluation of Silver Concentrations in Hydroxyapatite Powders

Méndez-Lozano,

Apatiga-Castro,

Ruíz-Baltazar

et al. 2023

JFB

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“…The HAp side shows a morphology of agglomerated plaques. This morphology is characteristic of the hydroxyapatite plaques reported in previous studies [13]. The TiO 2 coating (Figure 2d) shows a uniform film free of cracks, where the formation of nanostructures with well-defined faces is observed, indicating step-by-step growth.…”

Section: Resultssupporting

confidence: 75%

Microwave-Assisted Hydrothermal Synthesis of Hydroxyapatite Flakes as Substrates for Titanium Dioxide Film Deposition

Méndez-Lozano,

Pérez-Ramírez,

de la Luz-Asunción

2024

Ceramics

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This article describes the synthesis of hydroxyapatite (HAp) flakes through a microwave-assisted hydrothermal method. These flakes suggest possible applications as a substrate for depositing titanium dioxide (TiO2) films using chemical vapor deposition with metal–organic precursors (MOCVD). The results reveal the formation of crystalline hydroxyapatite characterized by a uniform morphology. Additionally, we demonstrated the successful deposition of TiO2 coatings on the hydroxyapatite flakes, resulting in a distinctive faceted prism morphology. Our findings affirm the effective synthesis of the HAp/TiO2 composite material. To further explore the material’s practical applications, we recommend assessing the photocatalytic activity of these composite membranes in future research.

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“…The effectiveness of nucleus growth and development plays a vital role in determining the crystalline structure of materials produced through the wet precipitation process, which functions via the nucleation-growth mechanism 4 , this can be attributed to the size-dependent solubility of nanoparticles (NPs), where smaller particles exhibit higher solubility and surface energy, facilitating the dissolution and growth of larger particles 18 .…”

Section: Resultsmentioning

confidence: 99%

“…acidic, where the acidic solution is slowly dripped into the alkaline solution, resulting in the precipitation step of HA. After this step, the filtration, drying, and thermal treatment of HA follow 4 . Some of the advantages presented by this HA obtaining technique are low reaction temperatures, control of chemical composition, and control of microstructural properties 6 .…”

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confidence: 99%

“…Some of the advantages presented by this HA obtaining technique are low reaction temperatures, control of chemical composition, and control of microstructural properties 6 . The morphology 3,4 and stoichiometry of the obtained material can be altered according to parameters such as reaction time, reaction temperature, concentration 4 , and "type/source" of reagents used 3 , as well as drying and thermal treatment conditions 4 .…”

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confidence: 99%

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Effect of synthesis temperature on crystallinity, morphology and cell viability of nanostructured hydroxyapatite via wet chemical precipitation method

Rosa,

Farias,

Dias

et al. 2022

IJAMB

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Hydroxyapatite (HA) is the main natural mineral constituent of bones and is a good alternative for biomedical applications because it is osteoconductive, non-allergenic, and non-carcinogenic, which ensures high biocompatibility. A commonly used method for obtaining hydroxyapatite is the wet route, which is simple and low-cost, produces only water as a final residue, and provides HA with a crystallinity comparable to that of bone tissue, which favors its biocompatibility. Therefore, the objective of this work is to synthesize hydroxyapatite via the wet chemical precipitation method at different temperatures (4°C, 30°C, 50°C, or 70°C) to observe the influence of temperature on crystallinity, morphology, and cytotoxicity. The results of X-ray diffraction show that all syntheses resulted in pure hydroxyapatite, while increasing the temperature led to higher crystallinity (10.6% to 56.2%) and the crystal size was slightly affected. The increase in temperature changed the particle shape from irregular to needle-like. Cell viability was tested by PicoGreen® in VERO cells for samples at concentrations of 30 and 300µg/mL, and the samples synthesized at 4°C, with lower crystallinity, caused less DNA damage to cells compared to the negative control.

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Effect of temperature on crystallite size of hydroxyapatite powders obtained by wet precipitation process

Cited by 13 publications

References 21 publications

Characterization and Evaluation of Silver Concentrations in Hydroxyapatite Powders

Characterization and Evaluation of Silver Concentrations in Hydroxyapatite Powders

Microwave-Assisted Hydrothermal Synthesis of Hydroxyapatite Flakes as Substrates for Titanium Dioxide Film Deposition

Effect of synthesis temperature on crystallinity, morphology and cell viability of nanostructured hydroxyapatite via wet chemical precipitation method

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