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Subject: Engineering

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Now showing 1 - 5 of 5
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    NiAl 2 O 4 spinel-type catalysts for deoxygenation of palm oil to green diesel
    (2018-08-01) Atthapon Srifa; Rungnapa Kaewmeesri; Cheng Fang; Vorranutch Itthibenchapong; Kajornsak Faungnawakij; Mahidol University; King Mongkut s University of Technology Thonburi; Thailand National Science and Technology Development Agency
    © 2018 Elsevier B.V. NiAl 2 O 4 spinel-type catalyst was successfully prepared by an incipient wetness impregnation method accompanied with high-temperature calcination at 1273 K for 10 h. The effect of reduction temperatures (773, 923, and 1073 K... degree at different temperatures. The TEM analysis revealed the formation of large particle size of the catalysts reduced at higher temperature. The highest product yield (94.3%) was achieved for the NiAl 2 O 4 reduced at 923 K. Interestingly, the spinel
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    Fabrication of glass-ceramics composite by infiltration of lithium tetraborate glass into porous magnesium aluminate spinel ceramic
    (2023-01-01) Kulrat N.; Busabok C.; Intarasiri S.; Dangtip S.; Khongwong W.; Mahidol University
    Magnesium aluminate spinel (MAS) glass-ceramics composite has excellent mechanical and optical properties. It can be obtained from porous ceramic by infiltrating the proper choice of glass. In this study, porous MAS ceramic was prepared
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    Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites
    (2021-06-01) Tanawat Imboon; Jeerawan Khumphon; Khrongkhwan Yotkuna; I. Ming Tang; Sirikanjana Thongmee; Kasetsart University; Mahidol University
    bands from 250 to 550 nm. These bands arise from the d–d crystal field transitions of the tetrahedral Mn3+ species and indicate a distortion in the crystal structure. Photo-catalytic activity of spinel ferrite Mn3O4 NP’s by themselves was low but photo... with an interplanar d-spacing of 0.49 nm for (101) plane.2.Photocatalytic activity of spinel ferrite Mn3O4 nanoparticles by itself is low.3.Number of photoelectrons created depends on number of Mn3O4 on a given area of GO4.The bonding of the Mn3O4 to the GO sheet
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    Formation of nano CoFe2O4 crystallites in hydroxyapatite
    (2007-08-23) Weeraphat Pon-On; I. Ming Tang; Mahidol University; The Institute of Science and Technology for Research and Development, Mahidol University
    into the Ca(1) sites in HAP lattice when the HAP is heated above 750°C. SEM show that crystallites of irregular shapes coalesced into larger aggregates of cubic symmetrical structure characteristic of CoFe2O4 spinel as the annealing temperature is increased.
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    Gamma-irradiation assisted synthesis of nickel-cobalt oxide composites: Crystal structure dependency for supercapacitor efficiency
    (2025-02-05) Trakulmututa J.; Weerasuk B.; Sataman P.; Chutimasakul T.; Kamonsuangkasem K.; Smith S.M.; Sirisit N.; Sangtawesin T.; Trakulmututa J.; Mahidol University
    revealed a dose-dependent relationship between rock-salt (NiO or NiCoO₂) and spinel (Co₃O₄ or NiCo₂O₄) phases. The composite synthesized at 300 kGy (300NCO) achieved a specific capacitance of 73 F.g−1. Furthermore, the diluted-precursor method