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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Preparation and Characterization of Nanomaterials of Tellurium,Bismuth,and Bismuth Telluride
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Preparation and Characterization of Nanomaterials of Tellurium,Bismuth,and Bismuth Telluride

机译：碲，铋和碲化铋纳米材料的制备与表征

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摘要

In order to improve the processing and performance of tellurium(Te),bismuth(Bi),and bismuth telluride(dibis-muth tritelluride,Bi2Te3),which are valuable thermoelectric materials that operate near room temperature in the bulk state,a nanometer scale synthetic method,in which the starting materials are reduced with NaBH4 in the presence of protecting agents in solution under mild conditions,was used.Te nanorods having an average diameter of 10 +-3 nm(aspect ratio=3.0)were prepared by reducing tellurium(IV)ethoxide in ethanol in the presence of poly(Ar-vinyl-2-pyrrolidone)(PVP)under nitrogen.Although Bi nanoparticles prepared from bismuth(III)chloride by this method have an average diameter of 29 +-8 nm,PVP-protected Bi2Te3 nanoparticles have a really small average diameter(7 +-5 nm)and they are probably the smallest Bi2Te3 particles ever reported.Heat treatment of PVP-protected Bi2Te3 nanoparticles in refluxing solvents was found to improve the stability.
机译：为了改善碲（Te），铋（Bi）和碲化铋（Dibis-muth Tritulidide，Bi2te3）的加工和性能，这是有价值的热电材料，其在散装状态下在室温附近操作，纳米级合成 用NaBH 4在温和条件下在保护剂的保护剂存在下用NaBH 4减少的方法，使用了平均直径为10±3nm（纵横比= 3.0）的物质纳米棒（ IV）在氮气下在聚（Ar-乙烯基-2-吡咯烷酮）（PVP）下乙醇中的乙醇。虽然该方法由铋（III）氯化物制备的Bi纳米颗粒的平均直径为29±8nm，PVP - 保护的Bi2Te 3纳米颗粒具有真正小的平均直径（7±5nm），它们可能是有史以来最小的BI2Te3颗粒。发现PVP保护的PVP保护的BI2Te3纳米颗粒在回流溶剂中进行改善稳定性。

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