摘要
MoS_2与其他半导体的异质结一般采用二次生长法,该方法比较费时,而且容易产生聚集,针对该问题,本文采用高压釜水热法一次制备出了MoS_2/SnO2与MoS_2/SnS_2的复合物,利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射(XRD)和紫外-可见-近红外分光光度计(UV-vis-NIR)对样品进行了表征.实验结果显示,复合结构中,MoS_2为二维少层结构,制备过程中的NH_4^+对MoS_2二维结构的成形有促进作用;通过调整钼源与锡源的比例,发现将SnCl_4与(NH_4)_6Mo_7O_(24)中金属离子摩尔比调整为9∶1时,可以稳定得到MoS_2/SnS_2的二维材料.通过分析其生长机理可知,金属盐水解引起的溶液酸碱性变化及相互影响,对复合结构的成型起主要作用.
The composites of MoS_2 with other semiconductors always grow in two steps that other semiconductors were synthesized on the as prepared MoS_2.Hydrothermal method was taken to one-pot synthesize MoS_2/SnO_2 and MoS_2/SnS_2 composites.The samples were characterized by TEM,SEM,XRD and UV-vis-NIR.The results indicated that MoS_2 had thin layer structure and NH_4~+ furthered the shaping process of MoS_2.By modifying mole ratio of Sn and Mo to 9∶1,MoS_2/SnS_2 composite could keep the layer structure.With the analysis of growth mechanism,we can find that the change of pH caused by salt hydrolyzing dominated the forming of the layer structure of composites.
出处
《武汉大学学报(理学版)》
CAS
CSCD
北大核心
2017年第6期471-475,共5页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(11374236
11674254)
关键词
水热法
硫化钼
二维材料
复合物
hydrothermal method
molybdenum sulfide
two-dimensional material
composite