1 大阪大学大学院工学研究科Graduate School of Engineering, Osaka University
2 大阪大学先導的学際研究機構触媒科学イノベーション研究部門（ICS-OTRI）Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University
放射線照射により誘起される反応を利用し，Sn系ナノ粒子を合成した。SnCl2水溶液に60Co γ線を照射すると，金属Snナノ粒子が生成した。照射により生成する還元性活性種によりSn2+イオンが還元され，ナノ粒子化したものと考えられる。カーボン担体を添加して照射すると，SnO2ナノ粒子が得られた。担体表面に金属Snナノ粒子が分散担持することで微細化し，酸化したと考えられる。放射線を用いた合成法がスズにも適用可能であることが示された。
Tin nanoparticles were synthesized by chemical reactions induced by irradiation. γ-ray irradiation of aqueous solution of SnCl2 resulted in the formation of metallic Sn nanoparticles. It was indicated that Sn2+ions are reduced to zero valence by radiochemical species generated by the irradiation. On the other hand, SnO2 nanoparticles were obtained when irradiated in the presence of carbon support. Small metallic Sn nanoparticles were well dispersed on the surface of carbon support which are assumed to be easily oxidized to form SnO2 nanoparticles. It was indicated that nanoparticle synthesis techniques using radiation is applicable to form tin.
Key words: radiolysis; nanoparticle synthesis; γ-ray; reduction potential
© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)
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