Physicochemical Properties of Hydroxyapatite Extracted from Fish Scales

In this study, hydroxyapatite (HAp) was extracted from freshwater fish scales and saltwater fish scales using thermal decomposition method at various temperatures. The percentages of HAp in each species of raw fish scales were analysed using thermogravimetry analysis (TGA) whereas Fourier transform infrared (FTIR) was used to confirm the present of HA. The crystallinity of the HAp was studied using x-ray diffractometer (XRD). TGA and FTIR are found to be useful techniques to predict the composition of the HAp present in the fish scales. The results show that the composition of HAp in the fish scales was not significantly dependent on the species of the fish. The percentage of HAp in the fish scales ranged from 40 to 45 wt%. The heating temperature had an effect on the crystallinity and colour of the HAp produced. Results from FTIR and XRD confirmed that the HAp extracted from fish scales was similar to the HAp standard. However, the natural HAp produced from saltwater fish scales was more crystalline than that produced from freshwater fish scales. The HAp produced from this study is relatively cheap and more importantly they are HALAL for four billion Muslims population around the world.

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Extraction of Hydroxyapatite from Fish Scales and Its Integration with Rice Husk for Ammonia Removal in Aquaculture Wastewater

Indonesian Journal of Chemistry ◽

10.22146/ijc.40907 ◽

2019 ◽

Vol 19 (4) ◽

pp. 1019

Author(s):

Sofiah Hamzah ◽

Norhafiza Ilyana Yatim ◽

Maslinda Alias ◽

Asmadi Ali

Keyword(s):

Thermal Decomposition ◽

Rice Husk ◽

Decomposition Method ◽

Ammonia Removal ◽

Fish Scales ◽

X Ray Diffraction ◽

Coating Agent ◽

X Ray ◽

Thermal Decomposition Method ◽

Aquaculture Wastewater

Aquaculture plays an important role in providing food and generate high income in many developing countries but the abundance of ammonia discharged from aquaculture wastewater gives the problem to the environment. This study focused on the extraction of hydroxyapatite (HAp) from fish scales and its modification with rice husk to produce bio-adsorbent for ammonia removal from aquaculture wastewater. The comparison has been made for the HAp preparation via microwave irradiation, alkaline heat treatment, and thermal decomposition method. X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) were used to analyze the surface chemistry and crystallinity of HAp, respectively. While the morphology of the HAp was observed under a Scanning Electron Microscope (SEM). Hydroxyapatite extracted via thermal decomposition method shows the best performance about 79% of ammonia removal at 210 min contact time which selected for coating agent of rice husk (RH/HAp) and was successfully removed 84% at 60 min saturation time. The result shows thermal decomposition is the best technique to extract HAp from fish scales and its integration with rice husk exhibited a better performance of bio-adsorbent. The findings of this study provide useful fundamental knowledge and platform for the development and improvement of aquaculture wastewater treatment system in the future.

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Mössbauer effect studies and X-ray diffraction analysis of cobalt ferrite prepared in powder form by thermal decomposition method

Bulletin of Materials Science ◽

10.1007/bf02707349 ◽

2003 ◽

Vol 26 (5) ◽

pp. 509-515 ◽

Cited By ~ 6

Author(s):

M. D. Joseph Sebastian ◽

B. Rudraswamy ◽

M. C. Radhakrishna ◽

Ramani

Keyword(s):

Thermal Decomposition ◽

Diffraction Analysis ◽

Mössbauer Effect ◽

Decomposition Method ◽

Cobalt Ferrite ◽

Powder Form ◽

X Ray Diffraction ◽

Mossbauer Effect ◽

X Ray ◽

Thermal Decomposition Method

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Photocatalytical Properties and Theoretical Analysis of N, Cd-Codoped TiO2Synthesized by Thermal Decomposition Method

International Journal of Photoenergy ◽

10.1155/2012/453018 ◽

2012 ◽

Vol 2012 ◽

pp. 1-9 ◽

Cited By ~ 8

Author(s):

Hongtao Gao ◽

Bing Lu ◽

Fangfang Liu ◽

Yuanyuan Liu ◽

Xian Zhao

Keyword(s):

Thermal Decomposition ◽

Theoretical Analysis ◽

Valence Band ◽

Conduction Band ◽

Photoelectron Spectroscopy ◽

Decomposition Method ◽

Density Functional ◽

X Ray ◽

Thermal Decomposition Method ◽

Bet Specific Surface Area

N, Cd-codoped TiO2have been synthesized by thermal decomposition method. The products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-visible diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) specific surface area analysis, respectively. The products represented good performance in photocatalytic degradation of methyl orange. The effect of the incorporation of N and Cd on electronic structure and optical properties of TiO2was studied by first-principle calculations on the basis of density functional theory (DFT). The impurity states, introduced by N 2p or Cd 5d, lied between the valence band and the conduction band. Due to dopants, the band gap of N, Cd-codoped TiO2became narrow. The electronic transition from the valence band to conduction band became easy, which could account for the observed photocatalytic performance of N, Cd-codoped TiO2. The theoretical analysis might provide a probable reference for the experimentally element-doped TiO2synthesis.

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Synthesis of Transition Metal Dichalcogenides based hybrid nanostructures by thermal decomposition method

Journal of Physics Conference Series ◽

10.1088/1742-6596/2070/1/012095 ◽

2021 ◽

Vol 2070 (1) ◽

pp. 012095

Author(s):

Melbin Baby ◽

K. Rajeev Kumar

Keyword(s):

Electron Microscopy ◽

Thermal Decomposition ◽

Decomposition Method ◽

Transition Metal Dichalcogenides ◽

Hybrid Nanostructures ◽

Hybrid Nanostructure ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Decomposition Method ◽

Metal Dichalcogenides

Abstract In this work, we report synthesis of hybrid nanostructures of Transition Metal Dichalcogenides via thermal decomposition method. Ammonium tetrathiomolybdate was used as not only growth templates but also as starting precursor for synthesis of hybrid nanostructures. The conditions for the synthesizing method were optimized using electron microscopy and x-ray diffraction. In this hybrid nanostructure synthesis, it was found that MoO3 nanorods are interspersed on exfoliated MoS2 nanosheets. The structural and optical properties of the hybrid nanostructure were investigated using transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and Ultraviolet Visible spectrophotometry (UV-VIS). The hybrid nanostructure of MoO3 on MoS2 shows a band gap of 2.2 eV. It was also found that by tuning the preparation parameters viz temperature of heating and time of heating, the composition of the hybrid nanostructure can be varied.

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Phase Transition and Microstructure Development of BaTiO3 by Thermal Development of BaTiO3 by Thermal Decomposition Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.879.13 ◽

2018 ◽

Vol 879 ◽

pp. 13-17

Author(s):

Sudarath Suntaropas ◽

Panakamon Thonglor ◽

Naphat Albutt

Keyword(s):

Thermal Decomposition ◽

Decomposition Method ◽

Sintering Temperature ◽

Particle Growth ◽

Microstructure Development ◽

X Ray Diffraction ◽

X Ray ◽

Thermal Decomposition Method ◽

Thermal Development ◽

Major Factors

The thermal decomposition was used to prepare BaTiO3 powders. Using BaCO3 and TiO2 powders as precursors and heat treatment in the temperature range of 600-1000 °C for 6 hr. The final product (BaTiO3) proceeds through a trace amount of Ba2TiO4. The phase transformation was investigated by X-ray diffraction (XRD) as a function of sintering temperature. The results show that the microstructures of BaTiO3 were developed during sintering at different temperature. In additional, the particle growth of BaCO3 and TiO2 are the major factors to affect of the particle growth mechanism.

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Preparation of Nano-FeXOY by Thermal Decomposition Method and Morphology Research

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.148-149.1124 ◽

2010 ◽

Vol 148-149 ◽

pp. 1124-1128

Author(s):

Ru Xin Che ◽

Shuo Wang ◽

Bing Yu

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Thermal Decomposition ◽

Decomposition Method ◽

Primary Particle ◽

X Ray ◽

Thermal Decomposition Method ◽

Transmission Electron ◽

Ray Diffusion ◽

20 Nm

Nano-FexOy (including γ-Fe2O3, α-Fe2O3 and Fe3O4) particles were prepared by acetylacetonate iron [Fe(C5H7O2)3] thermal decomposition under air condition at low temperature. X-ray diffusion (XRD), transmission electron microscopy (TEM), electron diffraction pattern (EDP), and specific surface area were carried out to characterized these nanoparticles. The influencing factors of experiment were discussed and studied, and the results show that γ-Fe2O3, α-Fe2O3 and Fe3O4 in different morphology can be obtained respectively by controlling the experiment conditions. The primary particle of Fe3O4 is about 16 nm; the primary particle of γ- Fe2O3 is about 20 nm and arranges compact. The second nanoparticle of γ- Fe2O3 presents catenarian and has the tendency to form an close space.

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