Chemical and Biochemical Engineering, Rutgers University , 98 Brett Road, Piscataway, New Jersey 08854, United States.
Langmuir. 2017 Apr 18;33(15):3765-3775. doi: 10.1021/acs.langmuir.6b04583. Epub 2017 Apr 4.
We synthesize hollow spherical particles/membrane sacks of graphene oxide loaded with nanoparticles to be used as nanoparticles carriers, through a new method based on emulsion precipitation and sublimation of the cores. We vary the synthesis parameters, such as shear rate, pH, and graphene oxide and oil concentration ratios. Our results show a concentration dependent membrane thickness that varies between 3 and 25 nm depending on the concentration, and their mean diameters vary between 500 nm and 70 μm. In addition, polymeric nanoparticles are loaded inside the graphene oxide shells forming core-shell particles demonstrating that they can be used as carriers for nanoparticles. Our particles are characterized via laser diffraction, zeta potential, FE-SEM, TEM, BET, and AFM. Potential applications of this work include applications that benefit from core-shell structures and nanoparticle carriers, including drug formulation, catalysis, and electrochemical applications.
我们通过一种新的基于乳液沉淀和核心升华的方法，合成了负载纳米粒子的氧化石墨烯空心球形粒子/膜袋，用作纳米粒子载体。我们改变了合成参数，如剪切速率、pH 值以及氧化石墨烯和油的浓度比。我们的结果表明，膜的厚度与浓度有关，在 3 到 25nm 之间变化，平均直径在 500nm 到 70μm 之间变化。此外，聚合物纳米粒子被负载在氧化石墨烯壳内，形成核壳粒子，证明它们可以用作纳米粒子的载体。我们的粒子通过激光衍射、Zeta 电位、FE-SEM、TEM、BET 和 AFM 进行了表征。这项工作的潜在应用包括受益于核壳结构和纳米粒子载体的应用，包括药物制剂、催化和电化学应用。
