Sb2Te3纳米片的水热合成与表征  

Hydrothermal Synthesis and Characterization of Sb_2Te_3 Nanoplates

作　　者：柴臻臻 郑文君[1] 

机构地区：[1]南开大学化学学院,先进能源材料化学教育部重点实验室,天津化学化工协同创新中心,天津300071

出　　处：《高等学校化学学报》2016年第3期435-441,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21371101,21421001);高等学校学科创新引智计划项目(批准号:B12015);教育部创新群体项目(批准号:IRT13022)资助

摘　　要：在水热条件下,以乙醇胺为还原剂,实现了亚碲酸根(TeO^(2-)_3)的分步还原,并以新生成的单质Te纳米棒为碲源,原位一步法合成出六方相Sb_2Te_3纳米片.采用X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FESEM)和透射电子显微镜(TEM)等对产物的物相、形貌及组成进行了表征.结果表明,产物Sb_2Te_3为六方纳米片,厚度约为100~200 nm,直径约为0.6~1.5μm,形貌均一,分散性良好.适宜的合成条件是水/乙醇胺体积比为8∶12,180℃下反应24 h.依据部分实验结果以及单质Te和六方相Sb_2Te_3晶体结构的比较,证明了Sb_2Te_3主要以外延方式在单质Te纳米棒表面生长,且两者的晶面取向为(003)Te//(003)Sb_2Te_3,[110]Te//[110]Sb_2Te_3.Under hydrothermal conditions and with ethanolamine acting as the reducing agent,fractional reduction of Te O3^2-was realized,and Sb_2Te_3 nanoplates were synthesized in situ with the newly generated Te nanorods acting as tellurium source. The as-prepared product was characterized by X-ray powder diffractometer（ XRD）,field emission scanning electron microscope（ SEM）,and transmission electron microscope（ TEM）.Results showed that the product presents the hexastyle nanoplate structure with the thickness of about 100—200 nm and the diameter of about 0. 6—1. 5 μm,and has a uniform morphology and good dispersibility. The suitable conditions were that the volume ratio of water to ethanolamine was 8 ∶ 12,and the reaction lasted for24 h at 180 ℃. By comparing the crystal structures of the elemental Te and hexagonal Sb2Te3 as well as some experimental results,that the hexagonal phase Sb2Te3 grew epitaxially on the lateral sides of newly generated Te nanorods was discussed preliminarily,and their crystal orientations were（ 003） Te / /（ 003） Sb2Te3,and[110]Te / /[110]Sb2Te3.

关 键 词：水热合成 Sb2Te3纳米片 形貌 反应机制 

分 类 号：O614[理学—无机化学]