水热法合成Bi2S3纳米管及其生长机理

以硝酸铋Bi(NO)3]和硫化钠(Na2S)为反应原料, 采用水热法在120 ℃下反应12 h, 制备出Bi2S3纳米管. 利用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、选区电子衍射(SAED)和高分辨透射电镜(HRTEM)对其结构和形貌进行了表征. 结果表明, 所制备的产物是结晶良好的正交相Bi2S3纳米管, 其外径为100~500 nm, 内径为50~200 nm, 长为1~5 μm. 根据实验结果讨论了Bi2S3纳米管的生长机理. 初步研究了反应温度和矿化剂种类对产物形貌和结构的影响.

Hydrothermal Synthesis of Bismuth Sulfide Nanotubes and Its Formation Mechanism

Large-scale high-quality Bi2S3 nanotubes were successfully prepared by a facile hydrothermal reaction between Bi(NO3)3 and Na2S at a low reaction temperature. The morphology and structure of as-prepared samples were investigated by X-ray Diffraction(XRD), Scanning Electron Microscopy(SEM), Transmission Electron Microscopy(TEM), Selective-area Electron Diffraction(SAED) and High-resolution Transmission Electron Microscopy(HRTEM). The characterization results show that the nanotubes are well-crystallized orthorhombic Bi2S3 nanotubes with out diameter 100—500 nm, inner diameter 50—200 nm and lengths between 1 to 5 μm respectively. The growth mechanism of Bi2S3 nanotubes was proposed on the basis the results of experiment. The effects of reaction temperature and different mineralizers were also investigated.