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Synthesis of CTAB-IPA reduced copper nanoparticles

机译:CTAB-IPA还原铜纳米粒子的合成

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Synthesis of copper nanoparticles by reduction of Cu2+ ions to Cu-0 in the presence of cetyltrimethylammonium bromide (CTAB) and isopropanol (IPA). Experiments included the synthesis of copper nanoparticles by varying the molar concentration of CTAB keeping that of Cu2+ ions constant. In the first set Cu2+-IPA solution was added to CTAB-IPA mixture, the sequence was reversed in the second set. Differences in results are observed in each case. UV-visible spectra were recorded to note the changes taking place as a function of the added volume. Plasmon band for Cu-0 at similar to 560 nm and oligomers of Cu-0 at similar to 290 and similar to 340 nm wavelengths are observed. CTAB appears to play the role of catalyst in the reduction of Cu2+ ions in IPA under ambient conditions. Transmission electron microscopic (TEM) analysis of the copper nanoparticles synthesized at the two extreme molar ratios of Cu2+:CTAB, i.e. 1:0.25 and 1:30 show particles of size similar to 5-20 and similar to 2-10 nm, respectively, with a spherical morphology. (c) 2005 Elsevier B.V. All rights reserved.
机译:在十六烷基三甲基溴化铵(CTAB)和异丙醇(IPA)存在下,通过将Cu2 +离子还原为Cu-0来合成铜纳米颗粒。实验包括通过改变CTAB的摩尔浓度保持Cu2 +离子的恒定来合成铜纳米粒子。在第一组中,将Cu2 + -IPA溶液添加到CTAB-IPA混合物中,第二组中的顺序相反。在每种情况下都观察到结果差异。记录紫外线可见光谱,以记录随添加量的变化而发生的变化。观察到Cu-0的等离子带在类似于560nm的波长处,并且Cu-0的低聚物在类似于290和340nm的波长处被观察到。在环境条件下,CTAB似乎在减少IPA中的Cu2 +离子方面起着催化剂的作用。以两个最大摩尔比Cu2 +:CTAB(即1:0.25和1:30)合成的铜纳米粒子的透射电子显微镜(TEM)分析显示,其粒径分别类似于5-20和2-10 nm,具有球形形态。 (c)2005 Elsevier B.V.保留所有权利。

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