水热法合成MoO_3单晶纳米带及其形成机理  

Hydrothermal Synthesis of Single Crystalα-MoO_3 Nanobelts and Their Formation Mechanism

作　　者：高宾[1] 张晓军[1] 

机构地区：[1]西安工程大学理学院,西安710048

出　　处：《材料导报》2017年第2期112-116,共5页Materials Reports

基　　金：国家自然科学基金(51172187);西安工程大学博士科研基金(BS1340);陕西省教育厅自然科学专项(15JK1293)

摘　　要：以HCl和Na_2MoO_4·2H_2O为原材料,不用任何模板剂的情况下,用简单的水热法成功地制备了正交相单晶α-MoO_3纳米带。用X射线衍射仪、扫描电子显微镜、透射电子显微镜、紫外-可见光分光光度计对产物进行了表征。结果显示,α-MoO_3纳米带是由低温条件下形成的亚稳相h-MoO_3微米棒通过溶解-重结晶转变而来,其沿着c轴方向生长,加入表面活性剂CTAB可以提高α-MoO_3纳米带的长径比。Single crystal orthorhombic phase MoO3 （α-MoOa） nanobelts with uniform diameter were successfully prepared through a simple hydrothermal synthesis route at 180℃, using solution of sodium molybdate dihydrate as well as hydrochloric acid as raw materials and without template. The products were characterized by X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy. It can be concluded that the synthesized α-MoO3 nanobelts were transformed from the metastable phase α-MoO3 micro rods formed at low temperature （-90℃） by dissolution-recrystallization, and grew along the c-axis direction. Surfactant CTAB could increase aspect ratio of the prepared α-MoOa nanobelts.

关 键 词：三氧化钼 水热合成 纳米带 形成机理 长径比 

分 类 号：TQ127[化学工程—无机化工]