Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Polymer and Carbonaceous Materials, Wybrzeze St. Wyspianskiego 27, 50-370 Wroclaw, Poland.
Wroclaw University of Science and Technology, Faculty of Chemistry, Department of Analytical Chemistry and Chemical Metallurgy, Wybrzeze St. Wyspianskiego 27, 50-370 Wroclaw, Poland.
J Colloid Interface Sci. 2019 Apr 1;541:226-233. doi: 10.1016/j.jcis.2019.01.097. Epub 2019 Jan 23.
A new, facile in-situ method for synthesis of polymeric nanocomposites (NCs) with nanoparticles (NPs) of Au, Pt and Pd is proposed. The method involves reduction-coupled sorption of Au(III), Pt(VI), and Pd(II), which avoids diffusion limitations, allowing the precipitation and stabilization of the NPs directly in the polymeric matrix.
The obtained nanomaterials were characterized by transmission electron microscopy (TEM), and Fourier-transformation infrared spectroscopy (FT-IR). NPs loaded into polymers were also investigated using X-ray diffraction (XRD).
Based on the results, it was concluded that the amino functionalities simultaneously reduced noble metals ions and capped the NPs. The average diameter of the obtained AuNPs ranged from 25 to 109 nm, while reduction-coupled sorption was carried out in 1 and 3 mol L HCl solutions, respectively. Applying a 0.1 mol L HCl solution containing Au(III), Pd(II) and Pt(VI), a NC with AuNPs and cubic-like PdNPs was fabricated, while using a solution of the same composition, but in 3 mol L HCl, resulted in formation of a NC with flower-like PtNPs. Ultimately, the selected NC based on a resin with functionalities derived from 1-(2-aminoethyl)piperazine and with bi-metallic active sites, i.e. AuNPs and PdNPs, revealed catalytic activity in the reduction of 4-nitrophenol.
提出了一种新的、简便的原位方法，用于合成具有金、铂和钯纳米粒子（NPs）的聚合物纳米复合材料（NCs）。该方法涉及 Au(III)、Pt(VI)和 Pd(II)的还原偶联吸附，这避免了扩散限制，允许 NPs 直接在聚合物基质中沉淀和稳定。
通过透射电子显微镜（TEM）和傅里叶变换红外光谱（FT-IR）对所获得的纳米材料进行了表征。还使用 X 射线衍射（XRD）研究了负载在聚合物中的 NPs。
基于结果得出结论，氨基官能团同时还原贵金属离子并覆盖 NPs。所得 AuNPs 的平均直径范围为 25 至 109nm，而还原偶联吸附分别在 1 和 3mol/L HCl 溶液中进行。在含有 Au(III)、Pd(II)和 Pt(VI)的 0.1mol/L HCl 溶液中，制备了具有 AuNPs 和立方状 PdNPs 的 NC，而在相同组成的溶液中，但在 3mol/L HCl 中，形成了具有花状 PtNPs 的 NC。最终，选择了一种基于具有源自 1-(2-氨乙基)哌嗪的官能团的树脂的 NC，具有双金属活性位点，即 AuNPs 和 PdNPs，在 4-硝基苯酚的还原中表现出催化活性。
