Gamma-radiation induced synthesis of freestanding nickel nanoparticles

Yang Yi; Johansson M.; Wiorek A.; Tarakina N. V.; Sayed F.; Mathieu R.; Jonsson M.; Soroka I. L.

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Gamma-radiation induced synthesis of freestanding nickel nanoparticles

机译：γ-辐射诱导独立镍纳米粒子的合成

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A versatile method to produce metallic nickel nanoparticles is demonstrated. Metallic Ni nanoparticles have been synthesized from aqueous solution of NiCl2 using gamma-radiation induced reduction. To prevent Ni re-oxidation, post-irradiation treatment was elaborated. Structural and compositional analyses were executed using X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. These studies reveal that the synthesized material consists of fcc Ni particles having size of 3.47 +/- 0.71 nm. The nanoparticles have a tendency to agglomerate to the larger clusters. The latter are partially oxidized to form thin amorphous/poor-crystalline Ni(OH)(2)/NiO layers at the surface. Magnetization measurements demonstrate that the nanomaterial exhibit ferromagnetic-like behaviour with magnetization 30% lower than that in bulk Ni. The large active surface area (ECSA, 39.2 m(2) g(-1)) and good electrochemical reversibility, confirmed by the electrochemical studies, make the synthesized material a potential candidate as an active component for energy storage devices.

机译：展示了一种制备金属镍纳米颗粒的通用方法。利用γ辐射诱导还原法从氯化镍水溶液中合成了金属镍纳米颗粒。为了防止镍再氧化，对辐照后处理进行了阐述。利用X射线衍射、透射电子显微镜和X射线光电子能谱进行了结构和成分分析。这些研究表明，合成材料由fcc镍颗粒组成，颗粒大小为3.47+/-0.71 nm。纳米颗粒倾向于聚集成更大的团簇。后者被部分氧化，在表面形成薄的非晶/低结晶Ni（OH）（2）/NiO层。磁化测量表明，纳米材料表现出类似铁磁性的行为，磁化强度比大块镍低30%。电化学研究证实，大的活性比表面积（ECSA，39.2 m（2）g（-1））和良好的电化学可逆性使合成材料成为储能器件的潜在活性组分。

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《Dalton transactions: An international journal of inorganic chemistry》 |2021年第1期|共8页
作者
Yang Yi; Johansson M.; Wiorek A.; Tarakina N. V.; Sayed F.; Mathieu R.; Jonsson M.; Soroka I. L.;
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KTH Royal Inst Technol Sch Engn Sci Chem Biotechnol &

Hlth Dept Chem S-10044 Stockholm Sweden;

KTH Royal Inst Technol Sch Engn Sci Chem Biotechnol &

Hlth Dept Chem S-10044 Stockholm Sweden;

KTH Royal Inst Technol Sch Engn Sci Chem Biotechnol &

Hlth Dept Chem S-10044 Stockholm Sweden;

Max Planck Inst Colloids &

Interfaces D-14476 Golm Germany;

Uppsala Univ Dept Mat Sci &

Engn Box 35 SE-75103 Uppsala Sweden;

Uppsala Univ Dept Mat Sci &

Engn Box 35 SE-75103 Uppsala Sweden;

KTH Royal Inst Technol Sch Engn Sci Chem Biotechnol &

Hlth Dept Chem S-10044 Stockholm Sweden;

KTH Royal Inst Technol Sch Engn Sci Chem Biotechnol &

Hlth Dept Chem S-10044 Stockholm Sweden;

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正文语种 eng
中图分类化学;无机化学;
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Gamma-radiation induced synthesis of freestanding nickel nanoparticles

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