Synthesis and characterization of hydroxyapatite contain chromium

Sallam, Samira M.; Tohami, Khairi M.; Sallam, Al-Aliaa M.; Salem, Lotfi I. Abo; Mohamed, Faten Adel

doi:10.4236/jbpc.2012.34033

Cited by 31 publications

(29 citation statements)

References 9 publications

(9 reference statements)

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“…Moreover, some band overlapping of the RS and SF may cause the bands of amide II and amide III of SF to disappear. Also, as stated in some reports, there are some chemical interactions between the inorganic and organic phases in the composite. Most likely between Ca 2+ and those negatively charged functional groups in the organic matrix such as COO − , amide I, and amide II.…”

Section: Resultsmentioning

confidence: 85%

Role of silk fibroin and rice starch on some physical properties of hydroxyapatite‐based composites

Sriudom

Niamsup

Saipanya

et al. 2015

J of Applied Polymer Sci

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The role of organic blends of silk fibroin (SF) and rice starch (RS) in bone composites based on inorganic hydroxyapatite (HA) is studied. The physical property of HA‐based composites prepared by using the sol–gel method from Ca(OH)2 and H3PO4 in ethanol and water solvent (4 : 1 volume ratio) could be improved by adding SF and RS (1 : 2 weight ratio) to HA (7 : 3 weight ratio). The Fourier transform infrared spectrometer spectrum shows that the SF and RS organic phases are blended homogeneously into the HA crystal structure. Addition of SF increases the pore size and surface area of the composites, as measured by Brunauer–Emmett–Teller method, but their pore volume is slightly decreased. The values of lattice parameters, crystallinity, and crystallite size, as determined from the field‐emission scanning electron microscope, transmission electron microscope, and X‐ray diffractometer results, increase after adding RS. The results are agreeable with the increase of their compressive strength and Young's modulus. Thus, the improved physical property of the prepared HA–SF/RS composites is better suited as bone‐filling material than the standard HA or HA‐based composites with either SF or RS only. Therefore, due to its low cost, biocompatibility, and nontoxicity, this innovative solution could be worth taken under consideration by the restorative dental and orthopedic implants industry. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42722.

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Section: Resultsmentioning

confidence: 85%

Role of silk fibroin and rice starch on some physical properties of hydroxyapatite‐based composites

Sriudom

Niamsup

Saipanya

et al. 2015

J of Applied Polymer Sci

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“…The decrease of intensity might be caused by the dehydroxylation attributable to cobalt substitution in the HAp lattice [43][44]. It is worth noting that the replacement of Ca 2+ ions by Co 2+ ions affects the width of the band originating from PO 4 3-groups (ν 1 ).…”

Section: Ft -Ir Spectramentioning

confidence: 99%

Calcium Hydroxyapatite Supported Cobalt Catalysts for Ethanol Steam Reforming: Effect of the Incorporation Method of Active Phase

Dobosz¹,

Hull²,

Zawadzki³

2018

Studia UBB Chemia

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ABSTRACT. Cobalt catalysts supported on calcium hydroxyapatite (Ca10(PO4)6(OH)2, HAp) and modified with cerium ions were prepared in two different ways: direct microwave-assisted hydrothermal synthesis or incipient wetness impregnation method and characterized by XRD, TEM, SEM/EDS, FT-IR and Raman spectroscopy, N2 adsorption-desorption, TPD-NH3, TPR-H2 and XPS. The results indicate that Ca under hydrothermal conditions while cobalt and cerium species are formed on the HAp surface during support impregnation. Catalytic activity of samples was tested for hydrogen production via ethanol steam reforming (SRE), and it was found that the highest hydrogen yield (over 3,5 mol H2/mol C2H5OH) and the best distribution of products were obtained for the catalyst prepared by the incipient wetness impregnation method. For this catalyst, Co species formed on the HAp surface was easier reducible than Co 2+ ions located in the HAp crystal lattice, and surface was characterized by lower acidity.

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“…CHAp dengan waktu sonikasi 24 jam memiliki intensitas puncak yang lebih tinggi daripada CHAp 6 jam yang mengindikasikan bahwa semakin lama waktu sonikasi, derajat kristalinitas CHAp semakin bertambah. Hal tersebut dikonfirmasi dengan menghitung derajat kristalinitas CHAp menggunakan persamaan yang dikerjakan oleh (Sallam et al 2012) yaitu :…”

Section: Gambar 5 Pola Difraksi Sinar-x Dari Goniopora Danunclassified

Konversi Koral Laut Menjadi Hidroksiapatit Dengan Metode Sonikasi

2017

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ABSTRAK KONVERSI KORAL LAUT MENJADI HIDROKSIAPATIT DENGAN METODE SONIKASI.Sintesis coralline hydroxyapatite (CHAp) dari koral laut yang umumnya menggunakan metode basah yaitu hidrotermal yang memerlukan suhu dan tekanan tinggi. Tujuan dari penelitian ini adalah mengkonversi koral laut Goniopora sp. menjadi CHAp dengan metode sonikasi pada suhu rendah. Goniopora sp. dikalsinasi pada suhu 900°C selama 3 jam, kemudian direaksikan dengan diammonium hidrogen fosfat [(NH4)2HPO4] dan mono kalium fosfat (KH2PO4) dengan waktu sonikasi 6 jam sampai 24 jam pada suhu 60°C. Hasil penelitian menunjukkan bahwa telah terjadi perubahan fase dari koral menjadi CHAp yang dapat dilihat dari identifikasi pola difraksi sinar-X khas dari hidroksiapatit dengan derajat kristalinitas sebesar 66%

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Synthesis and characterization of hydroxyapatite contain chromium

Cited by 31 publications

References 9 publications

Role of silk fibroin and rice starch on some physical properties of hydroxyapatite‐based composites

Role of silk fibroin and rice starch on some physical properties of hydroxyapatite‐based composites

Calcium Hydroxyapatite Supported Cobalt Catalysts for Ethanol Steam Reforming: Effect of the Incorporation Method of Active Phase

Konversi Koral Laut Menjadi Hidroksiapatit Dengan Metode Sonikasi

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