研究報告

    第37巻(2017)

    研究報告37 - 1 　論文 - Original

    C3N4光触媒によるヨウ化水素水溶液からの水素生成
    Hydrogen Production on a C3N4 Photocatalyst from a Hydrogen Iodide Aqueous Solution


    萩原英久1)、伊田 進太郎2)、石原 達己3,4)

    1)富山大学研究推進機構水素同位体科学研究センター 　　　 〒930-8555 富山市五福3190
    2)熊本大学大学院 先端科学研究部 　　　　　　　　　　　　 〒860-8555 熊本市中央区黒髪2-39-1
    3)九州大学 カーボンニュートラル・エネルギー国際研究所 　 〒819-0395 福岡市西区元岡744
    4)九州大学大学院 工学研究院 応用化学部門 　　　　　　 〒819-0395 福岡市西区元岡744


    Hidehisa Hagiwara,1) Shintaro Ida,2) Tatsumi Ishihara3,4)
    1)Hydrogen Isotope Research Center, Organization for Promotion or Research, University of Toyama, Gofuku, Toyama 930-8555, Japan
    2) Faculty of Advanced Science and Technology, Kumamoto University Kurokami 2-39-1, Chuo-ku Kumamoto, 860-8555, Japan
    3) International Institute for Carbon-Neutral Energy Research, Kyushu University Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
    4) Department of Applied Chemistry, Faculty of Engineering, Kyushu University Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan

    Abstract
    Photocatalytic hydrogen production on graphitic carbon nitride (g-C3N4) from a hydrogen iodide (HI) aqueous solution was investigated with respect to light energy conversion. The photoabsorption and surface area of g-C3N4 depended strongly on the preparation temperature. The highest photocatalytic activity for HI decomposition was obtained with g-C3N4 prepared at 773 K, which had high photoabsorption capacity. This study revealed that the activity for I2 formation on the g-C3N4 surface could be improved to achieve efficient HI decomposition with stoichiometric H2 and I2 formation.

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    研究報告37 - 2 　論文 - Original

    水素により制御可能な開閉器の実験的検証
    Experimental study of a hydrogen-controllable switch of electric circuits

    赤丸 悟士，村井 美佳子，原 正憲
    富山大学　研究推進機構　水素同位体科学研究センター 930-8555　富山県富山市五福3190

    Satoshi Akamaru, Mikako Murai, Masanori Hara
    Hydrogen Isotope Research Renter, Organization for Promotion of Research, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan

    Abstract
    In this paper, the hydrogen-controllable switch of electric circuits was proposed. The concept of the switch is based upon hydrogen gas pressure controlling the switch condition, either opened or closed, without any electrical supports. The switch has been designed so that it is closed in an atmosphere that does sot contain hydrogen. To study its switching behaviors, the switch was placed in the argon gas flow. When flowing gas was changed to a gas mixture containing 9% H2 – 91%Ar, the switch was open after 201 s. However, when the mixture was replaced by argon gas, the switch was closed again. In addition, we determined that the threshold for hydrogen concentration while turning the switch on could be adjusted by an arranging a magnet in the switch.

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    研究報告37 - 3 　論文 - Original

    室温近傍での真空蒸留に伴うトリチウム水の濃度変化
    Changes in the concentration of tritiated water under vacuum distillation at around ambient temperature

    原 正憲1，小林 果夏1，赤丸 悟士1，中山 将人1，庄司 美樹2，押見 吉成3，町田 修3，安松 拓洋3

    1 富山大学 研究推進機構 水素同位体科学研究センター 〒930-8555 富山市五福3190
    2 富山大学 研究推進機構 アイソトープ実験施設 〒930-0194 富山市杉谷2630
    3 東京パワーテクノロジー株式会社 福島原子力事業所 〒979-1305 福島県双葉郡大熊町大字熊字錦台182-1

    Masanori Hara1, Kana Kobayashi1, Satoshi Akamaru1, Masato Nakayama1, Miki Shoji2, Yoshinari Oshimi3, Osamu Machida3, Takuyo Yasumatsu3

    1 Hydrogen Isotope Research Center, Organization for Research Promotion,
    University of Toyama Gofuku 3190, Toyama city, Toyama 930-8555, JAPAN
    2 Life Science Research Center, Organization for Research Promotion,
    University of Toyama Sugitani 2630, Toyama city, Toyama 930-0194, JAPAN
    3 Fukushima Nuclear Power Branch, Tokyo Power Technology Ltd Nishikidai 182-1 kuma,
    Okuma-machi, Futaba-gun, Fukushima 979-1305, JAPAN

    Abstract
    When measuring the tritium concentration in environmental water by liquid scintillation counting, distillation of the water sample is indispensable. To investigate changes the tritium concentration during distillation, tritiated water was distilled under vacuum at around ambient temperature. During vacuum distillation, the tritium concentration in the residual sample water increased and that in the condensed sample water decreased. The change in the tritium concentration during the distillation process was explained by Rayleigh distillation model. When the volume of the condensed water sample was about 80 % of that of the original sample, its tritium concentration was about 97 % of that in the original sample. Therefore, water sample should be distilled above 80 % of sample water to keep an underestimation of tritium concentration within 3 %.

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    研究報告37-4 ノート - Note

    種結晶法によるCHA 型ゼオライトの繰り返し合成と構造変化
    Synthesis and Structural Change of CHA Type Zeolite in the Repeated Seed-Growth Synthesis

    田口 明*，中森拓実，米山優紀
    富山大学 研究推進機構 水素同位体科学研究センター　　〒930-8555 富山市五福3190

    Akira Taguchi*, Takumi Nakamaori, Yuki Yoneyama　 Hydrogen Isotope Research Center　Organization for Promotion of Research, University of Toyama　Gofuku 3190, Toyama 930-8555

    Abstract
    The synthesis of CHA type zeolite using seed crystals was studied. CHA zeolite could be obtained by seeded growth synthesis, where the initial seeds of CHA zeolite were prepared by the hydrothermal conversion of FAU zeolite. However, the subsequent use of the resultant CHA zeolite as seed crystals resulted in a structure change to sanidine and analcine.

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