Flower-like In2 S3 hierarchical nanostructures were successfully prepared via a facile solution-phase route, using In( NO3 ) 3 as processor and C2 H5 NS as sulfur source. Our experimental results demonstrated that the morphology of the product can be easily modified by tuning the precursor ratio. The molar ratio of In( NO3 ) 3/C2 H5 NS plays a crucial role in the morphology of In2 S3 hierarchitectures. With the ratio increasing from 1:1. 5 to 1:6, the flower-like In2 S3 crystals exhibited various morphologies and different sizes. X-ray diffraction( XRD) patterns of the flowers revealed the cubic structure of In2 S3;morphological studies examined by scanning electron microscope( SEM) and transmission electron microscope( TEM) showed that the synthe-sized In2 S3 nanostructure was flower-like hierarchitecture assembled by nanoflakes. Density functional theory ( DFT) calculation results indicate that the adsorption of C2 H5 NS can affectively and selectively reduce the surface energy of In2 S3 facet, stabilize the corresponding crystal facet. The results indicate that there is a syn-ergistic effect between C2 H5 NS protecting the crystal facet and the nucleation rate for C2 H5 NS to tune the growth of In2 S3 nanoplates. Therefore, the morphology of flower-like In2 S3 crystals can be controlled by adjus-ting the C2 H5 NS concentration in the mixed solvent.%以C2 H5 NS和In( NO3)3为前驱物,采用简单的液相法成功制备了In2 S3纳米多级结构, C2 H5 NS作为硫源的同时也起到了模板剂的作用.研究结果表明,前驱物浓度对 In2 S3形貌控制起着重要作用.随着In(NO3)3/C2H5NS 摩尔比从1颐1.5增加到1颐6, In2S3纳米花呈现了不同的形貌和尺寸. XRD谱图显示, In2 S3纳米花晶体具有立方结构. SEM和TEM照片显示,制备的In2 S3纳米结构呈多级花状结构,这种结构由纳米片堆积组装而成.通过第一性原理计算并结合实验结果对C2 H5 NS影响纳米片生长的机理进行了分析,结果表明C2 H5 NS在In2 S3(001)晶面上的吸附可以有效降低晶面的表面能,起到稳定晶面的作用；纳米花的形成是在C2 H5 NS影响In2 S3的晶面稳定性及其成核速率之间的一个协同效应. In2 S3纳米晶的形貌可以通过调整反应溶液中的C2 H5 NS浓度来调节.
展开▼
