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Author: search.filters.author.Boonchom, BanjongSubject: search.filters.subject.Synthesis

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    A simple route to synthesize ferromagnetic binary calcium iron pyrophosphate CaFeP2O2 using aqueous-acetone media
    (2013-08-30)
    Chaiyasith, Pachernchaipat
    ;
    Ruttanapun, Chesta
    ;
    Thongkam, Montree
    ;
    Kongteweelert, Samart
    ;
    Woramongkonchai, Somsak
    A binary calcium iron pyrophosphate CaFeP<inf>2</inf>O<inf>7</inf> was synthesized by solid state route using the mixing of calcium carbonate, iron metal and phosphoric acid in aqueous-acetone media at 600°C. The XRD datum indicates the formation of CaFeP<inf>2</inf>O<inf>7</inf> phase without the presence of any phase impurities. FTIR result indicates the presence of the P<inf>2</inf>O<inf>7</inf> <sup>4-</sup> anion in the structure. Sheet-like microparticle of CaFeP<inf>2</inf>O<inf>7</inf> was revealed by SEM. Room temperature magnetization result showed ferromagnetic behavior of the synthesized CaFeP<inf>2</inf>O<inf>7</inf>, with saturation-specific magnetization value of 11.067 emu g<sup>-1</sup> at 10kOe. The magnetic feature of the synthesized CaFeP<inf>2</inf>O<inf>7</inf> in this work compared with M<inf>2</inf>P<inf>2</inf>O<inf>7</inf> (M = Ca and Fe), its isotypic (CaMP2O7 (M= Mn and Co) and CFeP<inf>2</inf>O<inf>7</inf> (C= Co and Cu) reported in our previous works is important properties for specific applications. © (2013) Trans Tech Publications, Switzerland.
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    Synthesis and ferromagnetic property of new binary copper iron pyrophosphate CuFeP2O7
    (2010-02-15)
    Boonchom, Banjong
    ;
    Vittayakorn, Naratip
    The pyrophosphate of CuFeP<inf>2</inf>O<inf>7</inf> was synthesized through one step-thermal synthesis at 500 °C using the mixing of copper carbonate, iron metals and phosphoric acid. FTIR and XRD results indicate the dominant feature of pyrophosphate (P<inf>2</inf>O<inf>7</inf><sup>4-</sup>) anion and a pure monoclinic phase with space group C<inf>2h</inf><sup>6</sup> (Z = 4), respectively. The crystallite size of 25 ± 9 nm for the CuFeP<inf>2</inf>O<inf>7</inf> was estimated by X-ray line broadening. Room temperature magnetization result shows ferromagnetic behavior of the CuFeP<inf>2</inf>O<inf>7</inf> powder, having hysteresis loop in the range of ± 10,000 Oe with the specific magnetization value of 1.57 emu g<sup>- 1</sup>. This property is important for specific application and is presented for the first time. © 2009 Elsevier B.V. All rights reserved.
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    Synthesis and characterization of nanocrystalline manganese pyrophosphate Mn2P2O7
    (2009-10-31)
    Boonchom, Banjong
    ;
    Baitahe, Rattanai
    Mn<inf>2</inf>P<inf>2</inf>O<inf>7</inf> polyhedral particles were synthesized by simple and cost-effective method using manganese nitrate hydrate and phosphoric acid in the presence of nitric acid with further calcinations at the temperature of 800 °C. The crystallite size obtained from X-ray line broadening is 31 ± 13 nm for the Mn<inf>2</inf>P<inf>2</inf>O<inf>7</inf>. The X-ray diffraction and SEM results indicated that the synthesized nanoparticles have only the structure without the presence of any other phase impurities. The FT-IR and FT-Raman spectra show characteristic bands of the P<inf>2</inf>O<inf>7</inf><sup>4-</sup> anion. The UV-Vis-NIR spectrum confirms the octahedral coordination of Mn<sup>2+</sup> ion. © 2009 Elsevier B.V. All rights reserved.
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    Synthesis of new binary cobalt iron pyrophosphate CoFeP2O7
    (2009-08-15)
    Boonchom, Banjong
    ;
    Phuvongpha, Nart
    A new binary cobalt iron pyrophosphate, CoFeP<inf>2</inf>O<inf>7</inf> was synthesized through solid phase reaction using cobalt carbonate, iron metal and phosphoric acid in the presence of water-methanol system with further calcinations at the temperature of 500 °C. The particle size obtained from X-ray line broadening is 36 ± 7 nm for the CoFeP<inf>2</inf>O<inf>7</inf>. FTIR spectrum of CoFeP<inf>2</inf>O<inf>7</inf> is assigned based on the P<inf>2</inf>O<inf>7</inf><sup>4-</sup> ion in the structure. The XRD, UV-Vis near IR and FTIR results of the synthesized CoFeP<inf>2</inf>O<inf>7</inf> appear to be very similar to that of M<inf>2</inf>P<inf>2</inf>O<inf>7</inf> (M = Fe and Co), which indicates the monoclinic phase with space group C2/m. © 2009 Elsevier B.V. All rights reserved.
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    A simple route to synthesize nickel ferrite (NiFe2O4) nanoparticles using egg white
    (2007-05-01)
    Maensiri, Santi
    ;
    Masingboon, Chivalrat
    ;
    Boonchom, Banjong
    ;
    Seraphin, Supapan
    NiFe<inf>2</inf>O<inf>4</inf> nanoparticles were synthesized by a simple and cost-effective method using Ni and Fe nitrates and freshly extracted egg white (ovalbumin) in an aqueous medium. The X-ray diffraction and selected-area electron diffraction results indicated that the synthesized nanoparticles have only the inverse spinel structure without the presence of any other phase impurities. Room temperature magnetization results showed a ferromagnetic behavior of the NiFe<inf>2</inf>O<inf>4</inf> nanoparticles, with saturation-specific magnetization values in the range of 26.4-42.5 emu/g at 10 kOe. © 2006 Acta Materialia Inc.