Phosphonate-hydroxyapatite hybrid compounds prepared by hydrothermal method

Agougui, Hassen; Aissa, Abdallah; Maggi, S.; Debbabi, Mongi

doi:10.1016/j.apsusc.2010.08.021

Cited by 25 publications

(11 citation statements)

References 19 publications

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“…In fact, the vibration bands of PO 3-4 groups of the hydroxyapatite structure are observed: (m 1 ) (960 cm 21 ), (m 2 ) (467 cm 21 ), (m 3 ) (1039-1097 cm 21 ), and (m 4 ) (566-605 cm 21 ). 22 After surface modification, new vibration band appear at 1231 cm 21 which is assigned to SAO group of (k-Carr). 24 The broad bands at 1600 to 1700 cm 21 and 3200 to 3600 cm 21 were attributed to HOH lattice.…”

Section: Resultsmentioning

confidence: 99%

“…XRD patterns of the modified CaHAp and the starting hydroxyapatite are given in Figure 1. 22 Elemental Analysis and SSA. This structure was conserved after treatment with different amounts of biopolymer.…”

Section: Resultsmentioning

confidence: 99%

“…This structure was conserved after treatment with different amounts of biopolymer. 22 This physical characteristic is generally one of the essential factors of the adsorption process. As observed, the broadening of the diffraction peaks of hydroxyapatite treated with (k-Carr) [ Figure 1(b-d)] was accompanied with a decrease of the intensities compared to unmodified hydroxyapatite [ Figure 1(a)].…”

Section: Resultsmentioning

confidence: 99%

“…This information shows a preferential interaction of (k-Carr) with the hydroxyapatite crystal in the perpendicular and parallel directions to the c lattice axis. 22 Elemental Analysis and SSA. The chemical analyses and SSA of the studied materials are summarized in Table I.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, the increase of SSA of the hybrid compounds was accompanied by an increase in the reactivity of their surface. 22 This physical characteristic is generally one of the essential factors of the adsorption process. The increase in the SSA of hydroxyapatites as a function of the grafting rate is related to the structural arrangement of the biopolymer in the surface of the solid.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis, characterization of hydroxyapatite‐lambda carrageenan, and evaluation of its performance for the adsorption of methylene blue from aqueous suspension

Agougui

Jabli

Majdoub

2017

J of Applied Polymer Sci

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The present work describes the synthesis of hydroxyapatite-lambda carrageenan CaHAp-(k-Carr) using an aqueous coprecipitation method. The characterization of the prepared hybrid compounds was achieved using chemical analysis, Fourier Transform Infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, and specific surface area. The results gleaned from X-ray powder analysis proved the presence of (k-Carr) and revealed that the increase of its concentration leads to the decrease of the CaHAp crystallinity. Fourier transform Infrared spectra show the presence of (k-Carr) and CaHAp characteristic vibrations in the resulting product. Scanning electron microscopy analyses reveal that the morphology of particles was changed by grafting and they are characterized by aggregates of different sizes and irregular shapes. After grafting BET measurements yielded particle specific surface areas ranging from 93 to 260 m 2 g 21 depending on the grafted biopolymer. The prepared products were, further, applied for the adsorption of methylene blue (a cationic dye) from aqueous suspension. The adsorption capacity was determined with respect to pH value, the initial dye concentration, time contact, and temperature. The kinetic, thermodynamic, and adsorption isotherm models were assessed for the description of the dye adsorption process. The experimental resulting data show that the prepared hybrid compound CaHAp-(k-Carr) is an efficient adsorbent for the removal of dyes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis, characterization of hydroxyapatite‐lambda carrageenan, and evaluation of its performance for the adsorption of methylene blue from aqueous suspension

Agougui

Jabli

Majdoub

2017

J of Applied Polymer Sci

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Chemical Synthesis and Characterization of Functionalized Hydroxyapatite (CAHAP)‐(2‐Carboxylethylphosphonic Acid (2‐CEPA)

Agougui

Aissa

Debbabi

2012

Ceramic Transactions Series

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Calcium hydroxyapatite powders functionalized with xanthan gum and pectin biopolymers: synthesis, characterization and adsorption efficiency toward methylene blue

Mabrouki,

Agougui,

Brahim

et al. 2024

Polymer International

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The precipitation technique was used to prepare calcium hydroxyapatite pectin (CaHAp‐Pec) and calcium hydroxyapatite xanthan (CaHAp‐Xan) hybrid materials. Chemical analysis, XRD, Fourier transform infrared spectroscopy, specific surface area, TGA and SEM were used to analyze the materials and the organic–inorganic interfaces. XRD and SEM investigations demonstrated that the presence of the biopolymer had an impact on both the structural and morphological properties as well as the crystallinity. The PO43− vibration modes are visible in the IR spectra, and new vibration modes mostly associated with Xan and Pec are observed at 1594, 2878 and 3246 cm−1. The specific surface area values were reduced after the chemical functionalization of CaHAp with pectin and xanthan gum. The ability of the three materials CaHAp, CaHAp‐Pec and CaHAp‐Xan to sorb methylene blue from aqueous solutions was assessed. The adsorption kinetics results best fitted the pseudo‐second‐order model. The isotherm data agreed well with the Freundlich model. The adsorption capacity values of porous composites CaHAp‐Xan 5%, CaHAp‐Pec 10% and CaHAp reached 277, 243 and 144 mg g−1, respectively. The non‐spontaneous and exothermic nature of the adsorption was demonstrated by the thermodynamic parameters (ΔG0, ΔH0 and ΔS0). Adsorption results confirmed that CaHAp‐Xan could be used as an effective adsorbent of cationic dyes from water. © 2024 Society of Chemical Industry.

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Phosphonate-hydroxyapatite hybrid compounds prepared by hydrothermal method

Cited by 25 publications

References 19 publications

Synthesis, characterization of hydroxyapatite‐lambda carrageenan, and evaluation of its performance for the adsorption of methylene blue from aqueous suspension

Synthesis, characterization of hydroxyapatite‐lambda carrageenan, and evaluation of its performance for the adsorption of methylene blue from aqueous suspension

Chemical Synthesis and Characterization of Functionalized Hydroxyapatite (CAHAP)‐(2‐Carboxylethylphosphonic Acid (2‐CEPA)

Calcium hydroxyapatite powders functionalized with xanthan gum and pectin biopolymers: synthesis, characterization and adsorption efficiency toward methylene blue

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