Nanotechnology Centre, VŠB - Technical University of Ostrava, 17. listopadu 15/2172, Ostrava 70833, Czech Republic.
Department of Soil Science and Geology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia.
J Nanosci Nanotechnol. 2019 May 1;19(5):2807-2813. doi: 10.1166/jnn.2019.15851.
Due to its easy availability, preparation, handling and non-toxic nature, horsetail extract was chosen as a reducing, stabilizing and functionalizing agent for Au and bi-phasic Au/ZrO₂ nanoparticle phytosynthesis-inorganic nanoparticle synthesis mediated by plant extract. We studied Au and bi-phasic Au/ZrO₂ nanoparticles in colloids by various physical-chemical and analytical methods over 5 weeks. Dynamic Light Scattering and Scanning Transmission Electron Microscopy compared core and hydrodynamic diameters of nanoparticles. -potential measurement indirectly determined nanoparticles stability in liquid medium. Ultraviolet-Visible Spectroscopy characterized basic absorbance maxima for both Au and the bi-phasic Au/ZrO₂ system. Finally, total metal concentration was determined using Inductively Coupled Plasma Mass Spectrometry. -potential measurements proved satisfactory stability of both Au (-13.4 to -17 mV) and Au/ZrO₂ nanoparticles (-14.1 to -17.5 mV) over the experimental period. Scanning Transmission Electron Microscopy with Selected Area Diffraction analysis confirmed nanoparticles crystalline nature, and we determined 24 nm and 40 nm core nanogold diameters in Au and Au/ZrO₂ nanoparticle colloids. Dynamic light scattering analysis confirmed the dichotomy between particle sizes in liquid medium in the hundreds of nanometers measured, and long-term measurements confirmed reasonable colloid stability-a paramount parameter for potential nanoparticles applications; especially in heterogeneous catalysis.
由于其易于获得、制备、处理和无毒的性质，马尾草提取物被选为金和双相金/ZrO₂纳米粒子的还原、稳定和功能化剂，通过植物提取物介导的无机纳米粒子合成。我们在 5 周内通过各种物理化学和分析方法研究了胶体中的金和双相金/ZrO₂纳米粒子。动态光散射和扫描透射电子显微镜比较了纳米粒子的核和水动力直径。-电势测量间接确定了纳米粒子在液体介质中的稳定性。紫外-可见光谱对金和双相 Au/ZrO₂体系的基本吸收最大值进行了特征化。最后，使用电感耦合等离子体质谱法测定总金属浓度。-电势测量证明 Au（-13.4 至-17 mV）和 Au/ZrO₂纳米粒子（-14.1 至-17.5 mV）在实验期间具有令人满意的稳定性。扫描透射电子显微镜与选区衍射分析相结合，证实了纳米粒子的结晶性质，我们确定了 Au 和 Au/ZrO₂纳米粒子胶体中 24nm 和 40nm 的核金直径。动态光散射分析证实了液体介质中粒径的二分法，在数百纳米的测量范围内，长期测量证实了胶体的稳定性，这是潜在纳米粒子应用的一个至关重要的参数；特别是在多相催化中。
