| 研究実績の概要 |
Boron nitride (BN) nanomaterials are distinguished as the assembly of the chemical and thermal stabilities, high oxidative resistance, insulating, and high thermal conductivity. The project is aimed at the fabricating BN in nanoporous bulk materials and explorations on the adsorption based applications, e.g. adsorbent for hydrogen storage. During last fiscal year, as the primary studies, the microporous BN microbelt was explored as the capturer for dye molecules and the support for silver (Ag) nanoparticles in surface-enhanced Raman spectroscopy (SERS) (Nanoscale, 2015, 7, 18992). The abundant porosity gave the high adsorption capacity to accumulate the dye molecules from the solutions for enhancing the signals in SERS detection. As a result, the detection limit of the fabricated Ag/BN was improved by at least three orders of magnitude, showing the advantages of the porous structures in BN materials. Meanwhile, a bulk material of graphene, an electrical conductive counterpart of BN, was directed used the electrode materials for supercapacitor in organic electrolytes (Nano Energy, 2015, 16, 81). The supercapacitors showed a high energy density of 50 Wh/kg at the high maximum-power-density of 340 kW/kg. Furthermore, the porous BN nanomaterials with controlled porosities and surface area have been fabricated basically through the proposed procedure. We will further study the adsorption behaviors in hydrogen storage, water cleaning, etc.
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| 次年度使用額が生じた理由 |
A part of budget was remained because it took us some time to wait for the recovery of our furnace which was broken for several times. And cheaper precursors were found to work well in preparation of macroporous BN product. The remaining budget was requested to be spent for further improving, modifying the nanoporosity and testing surface functionalities of final BN product for enhanced adsorption performances, and spread our stuidies to academic community by joining international symposiums in H28.
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