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Methylviologen mediated electrosynthesis of gold nanoparticles in the solution bulk

机译:甲基硫代蛋白介导的金纳米颗粒在溶液中的电气合成

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摘要

Electrosynthesis of gold nanoparticles (AuNp) was carried out by methylviologen mediated reduction of Au(I) at potentials of the MV2+/MV center dot+ redox couple in water/0.1 M NaCl medium, in the absence and in the presence of stabilizers. In all the cases, AuNp are formed in the solution bulk and are not deposited on the cathode. In the absence of stabilizers, AuNp (14-100 nm) coalesce to give aggregates of various shapes that eventually form a deposit. Sonication reversibly destructs the deposit into nanoparticles. In the presence of alkylamino-modified silicate nanoparticles (SiO2-NHR, 120-160 nm), spherical AuNp (<= 20 nm) are bound as inclusions in the SiO2-NHR surface layer. Polyvinylpyrrolidone (40 000 D) stabilizes spherical AuNp with a mean diameter of 5-14 nm. All the particles were characterized by electron microscopy methods (SEM, STEM) and X-ray powder diffraction (XRPD).
机译:金纳米颗粒(AUNP)的电气结合通过甲基硫化介导的Au(I)介导的Au(i)在水/ 0.1M NaCl培养基中的MV2 + / MV中心点+氧化还原耦合的潜在的介导的介导的降低,在不存在和存在的情况下。 在所有情况下,AUNP形成在溶液堆积中,并且不沉积在阴极上。 在没有稳定剂的情况下,AUNP(14-100nm)的聚结会给予最终形成押金的各种形状的聚集体。 超声处理可逆地破坏纳米颗粒。 在烷基氨基改性的硅酸盐纳米颗粒(SiO 2 -NOHR,120-160nm)的存在下,球形AUNP(<= 20nm)在SiO 2-NHR表面层中含有夹杂物。 聚乙烯吡咯烷酮(40 000d)稳定平均直径为5-14nm的球形AUNP。 通过电子显微镜方法(SEM,茎)和X射线粉末衍射(XRPD)表征所有颗粒。

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  • 来源
    《RSC Advances》 |2016年第3期|共9页
  • 作者单位

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Kazan Fed Univ Interdisciplinary Ctr Analyt Microscopy Kazan 420018 Russia;

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Russian Acad Sci Kazan Sci Ctr AE Arbuzov Organ &

    Phys Chem Inst Kazan 420088 Russia;

    Kazan Fed Univ Interdisciplinary Ctr Analyt Microscopy Kazan 420018 Russia;

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  • 正文语种 eng
  • 中图分类 化学;
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