Shen Xiaoping, Wu Shikui, Liu Yan, Wang Kun, Xu Zheng, Liu Wei
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212003, PR China.
J Colloid Interface Sci. 2009 Jan 1;329(1):188-95. doi: 10.1016/j.jcis.2008.09.067. Epub 2008 Oct 1.
Large-scale syntheses of Prussian Blue (PB) uniform nanocubes and nanospheres, together with an interesting PB micro-frame structure, have been achieved by direct dissociation of a single-source precursor K(3)[Fe(CN)(6)] with polyvinylprrolidone (PVP) as a capping and reducing agent. The reaction temperature has been proved to be a key factor for morphology development of PB nanocrystals, and the size of PB nanocrystals can be tuned by adjusting the feed ratio of K(3)[Fe(CN)(6)] to PVP and the concentration of K(3)[Fe(CN)(6)]. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected-area electron diffraction (SAED), and high resolution transmission electron microscopy (HRTEM) were used to characterize the resulting nanocrystals and investigate their growth mechanisms. Optical and magnetic studies showed size- and shape-dependent optical and magnetic properties in the PB nanocrystals. An excellent electro-catalytic property to hydrogen peroxide reduction was observed at the PB nanocube-modified electrode.
通过以聚乙烯吡咯烷酮（PVP）作为封端和还原剂直接解离单源前驱体K₃[Fe(CN)₆]，已实现普鲁士蓝（PB）均匀纳米立方体和纳米球的大规模合成，以及一种有趣的PB微框架结构。已证明反应温度是PB纳米晶体形态发展的关键因素，并且可以通过调整K₃[Fe(CN)₆]与PVP的进料比以及K₃[Fe(CN)₆]的浓度来调节PB纳米晶体的尺寸。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）和高分辨率透射电子显微镜（HRTEM）来表征所得纳米晶体并研究其生长机制。光学和磁性研究表明PB纳米晶体中存在尺寸和形状依赖的光学和磁性特性。在PB纳米立方体修饰电极上观察到对过氧化氢还原具有优异的电催化性能。
