School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
Phys Chem Chem Phys. 2011 Mar 21;13(11):5047-52. doi: 10.1039/c0cp01271h. Epub 2010 Dec 20.
In this paper, we report a method of biomimetic synthesis of MgCO(3)·3H(2)O and MgO Viburnum opulus-like complex nanostructures with superhydrophobicity and adsorption properties. The MgCO(3)·3H(2)O complex nanostructures can be obtained by changing experimental parameters, including concentrations of reactants (dextran and MgCl(2)), molar ratios of reactants, and reaction time. The phase structure of as-synthesized samples was characterized by X-ray diffraction (XRD). The morphology and structure are studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared (FT-IR) spectroscopy. The MgCO(3)·3H(2)O complex nanostructures exhibited superhydrophobicity, due to their unique superstructures, and was proved by the contact angle (CA) measurement. We also show that a simple calcination of these unusually shaped MgCO(3)·3H(2)O results in spontaneous formation of MgO complex nanostructures while the unique shape can be maintained, and the as-synthesized MgO nanostructures show excellent adsorption property. These unique structures and properties will open up a wide range of potential applications in material and environmental protection.
本文报道了一种仿生合成具有超亲水性和吸附性能的 MgCO(3)·3H(2)O 和 Viburnum opulus 样复合纳米结构的方法。通过改变实验参数，包括反应物（葡聚糖和 MgCl(2)）的浓度、反应物的摩尔比和反应时间，可以得到 MgCO(3)·3H(2)O 复合纳米结构。通过 X 射线衍射（XRD）对合成样品的相结构进行了表征。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）和傅里叶变换红外（FT-IR）光谱对形貌和结构进行了研究。由于其独特的超结构，MgCO(3)·3H(2)O 复合纳米结构表现出超亲水性，这一点通过接触角（CA）测量得到了证明。我们还表明，这些形状奇特的 MgCO(3)·3H(2)O 经简单煅烧后，会自发形成 MgO 复合纳米结构，同时保持独特的形状，所合成的 MgO 纳米结构表现出优异的吸附性能。这些独特的结构和性能将在材料和环境保护等领域开辟广泛的潜在应用。
