CAJ | 학술논문

采用简单的溶剂热法制备出高纯度的由纳米片自组装而形成的碲化铋微米结构.在碲化铋的形成中,乙二醇不仅作为溶剂,而且还作为还原剂.研究发现,聚乙烯吡咯烷酮(PVP)和硝酸在碲化铋的形成中起到了很重要的作用.通过X-射线衍射(XRD)、X-射线光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)、高分辨透射电镜(HRTEM)、选区电子衍射(SAED)对其进行表征及研究.最后,利用时间演化实验对碲化铋的形成机理进行了探讨.
채용간단적용제열법제비출고순도적유납미편자조장이형성적제화필미미결구.재제화필적형성중,을이순불부작위용제,이차환작위환원제.연구발현,취을희필각완동(PVP)화초산재제화필적형성중기도료흔중요적작용.통과X-사선연사(XRD)、X-사선광전자능보(XPS)、소묘전경(SEM)、투사전경(TEM)、고분변투사전경(HRTEM)、선구전자연사(SAED)대기진행표정급연구.최후,이용시간연화실험대제화필적형성궤리진행료탐토.
High-quality hierarchical microstructures of Bi2Te3 self-assembled by nanoplates were prepared via a simple wet chemical method under solvothermal conditions.Ethylene glycol was used not only as a solvent,but also as a reducing agent.The poly(vinyl pyrrolidone)(PVP) and nitric acid played an important role in the construction of the hierarchically self-assembled microstructures.The products were characterized by X-ray diffraction (XRD),X-ray photoelectron spectra (XPS),scanning electron microscopy (SEM),transmission electron microscopy (TEM),high-resolution transmission electron microscopy (HRTEM),and selected area electron diffraction (SAED). A formation mechanism was also proposed based on the result of time-dependent microstructures.