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Boron Oxides

The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform

Eun Ju Jeon – 1st expert on this subject based on the ideXlab platform

  • synthesis of one dimensional neodymium iron Boron Oxides
    Materials Letters, 2020
    Co-Authors: Eun Ju Jeon, Yongho Choa

    Abstract:

    Abstract Electrospinning is widely used to produce one-dimensional (1-D) fibers with high-aspect ratio. However, there have been no attempts to fabricate neodymium-iron-Boron-oxide (Nd-Fe-B-O) fibers through this method. Considering the coercivity enhancement owing to their enhanced shape anisotropy attributed to the fibrous structure, herein, we prepared fibrous Nd-Fe-B-O. The precursor fibers were prepared by electrospinning. This was followed by heat treatment, for which three different temperatures were employed (900, 1000, and 1100 °C). Furthermore, the effects of the calcination temperature were examined in terms of the quantities of phases and the fibers’ crystal sizes. The mass percentage and crystallite sizes differed depending on the calcination temperature. The higher the calcination temperature, the bigger the crystallite sizes of all phases were. The targeted Nd2Fe14B fiber exhibited a coercivity of 7192 Oe.

Masoud Salavatiniasari – 2nd expert on this subject based on the ideXlab platform

  • sol gel synthesis of novel li based Boron Oxides nanocomposite for photodegradation of azo dye pollutant under uv light irradiation
    Composites Part B-engineering, 2019
    Co-Authors: Mahdi Ranjeh, Farshad Beshkar, Masoud Salavatiniasari

    Abstract:

    Abstract In the present study, Li2B4O7/LiBO2/Li3BO3 (LBO) nanocomposites were synthesized by a modified Pechini sol-gel route utilizing the mixture of different polybasic acids and gelling agents. This work demonstrated that by controlling the reaction variables including kind of polybasic acids and gelling agents, pH and mole ratio of polybasic acid to total metals, the LBO nanostructures with various morphologies and particle sizes were prepared. Furthermore, the LBO nanocomposites showed excellent TOC removal (70%) and photocatalytic efficiency (91%) in order to photodegradation of acid violet 7 azo dye as water pollutant under UV light irradiation. Moreover, compared to commercial P25 photocatalyst, the LBO heterostructures exhibited higher photodegradation activity for removal of acid violet 7 dye in 90 min under UV light irradiation, even after four times cycles. The excellent photocatalytic degradation of LBO photocatalyst can be ascribed to the strong photon absorption, high-efficiency charge carrier separation, uniform particle size and appropriate band gap energy of the nanocomposite. Also, radical trapping capability test exhibited that the photoinduced superoxide radicals (•O2−) and holes (h+) were the prevailing active species in the photocatalytic performance.

Yongho Choa – 3rd expert on this subject based on the ideXlab platform

  • synthesis of one dimensional neodymium iron Boron Oxides
    Materials Letters, 2020
    Co-Authors: Eun Ju Jeon, Yongho Choa

    Abstract:

    Abstract Electrospinning is widely used to produce one-dimensional (1-D) fibers with high-aspect ratio. However, there have been no attempts to fabricate neodymium-iron-Boron-oxide (Nd-Fe-B-O) fibers through this method. Considering the coercivity enhancement owing to their enhanced shape anisotropy attributed to the fibrous structure, herein, we prepared fibrous Nd-Fe-B-O. The precursor fibers were prepared by electrospinning. This was followed by heat treatment, for which three different temperatures were employed (900, 1000, and 1100 °C). Furthermore, the effects of the calcination temperature were examined in terms of the quantities of phases and the fibers’ crystal sizes. The mass percentage and crystallite sizes differed depending on the calcination temperature. The higher the calcination temperature, the bigger the crystallite sizes of all phases were. The targeted Nd2Fe14B fiber exhibited a coercivity of 7192 Oe.