还原剂对气相诱导前驱体共还原法制备Sb_2Se_3纳米棒的影响(英文)  

Effects of Reductant on Synthesis of Sb_2Se_3 Nanorods by Gas Induced Co-Reduction Method

作　　者：王鑫[1] 蔡克峰[1] 安百俊[1] 汪元元[1] 

机构地区：[1]同济大学功能材料研究所,上海200092

出　　处：《稀有金属材料与工程》2011年第S1期147-150,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50872095)

摘　　要：介绍利用气相诱导前驱体共还原方法制备了Sb2Se3一维纳米结构。利用XRD、EDS、FESEM和TEM等手段,研究了联氨、乙二胺、氨水等不同种类还原剂对Sb2Se3纳米棒生长过程的影响。研究表明,在气相还原剂诱导前驱体溶液共还原的过程中,联氨是一种较好的还原剂,其作为亲核试剂可有效的控制化学反应和形核速率,诱导前驱体中的Se4+和SbIII被还原形核并自组装形成一维纳米产物。同时,乙二醇溶剂起到了结构稳定剂的作用,随着反应体系的冷却,溶剂的挥发释放过程对纳米产物的形成有重要影响。Sb2Se3 nanorods were prepared on a glass substrate by a novel gas induced co-reduction method. Precursor solution containing SbIII and Se4+ were prepared by dissolving Sb2(OCH2CH2O)3 and SeO2 in ethylene glycol. The precursor solution was separated from a reductant initially, the reductant evaporated during the heating process, and was adsorbed by the precursor solution and finally Sb2Se3 nanostructures formed. The phase structure, composition, and microstructure of the nanoproducts were characterized by X-ray powder diffraction, Energy-dispersive spectrometry, field emission scanning electronic microscopy, and transmission electronic microscopy, respectively. Different reductants including hydrazine hydrate, ethylenediamine and ammonia were respectively introduced in the reaction system for comparison. It is found that the hydrazine hydrate is the best reductant. Using hydrazine hydrate as reductant, pure single crystalline Sb2Se3 nanorods are prepared. Possible growth mechanism of the Sb2Se3 nanorods was proposed.

关 键 词：Sb2Se3纳米棒 气相诱导前驱体共还原方法 还原剂 生长机制 

分 类 号：TB383.1[一般工业技术—材料科学与工程]