Large-scale synthesis of single-crystalline MgO with bone-like nanostructures
Large-scale synthesis of single-crystalline MgO with bone-like nanostructures
复制标题
大规模合成具有骨状纳米结构的单晶氧化镁
DOI：
10.1007/s11051-006-9138-x
复制
发表时间：
2006-08
影响因子：
2.5
通讯作者：
Niu, Haixia
中科院分区：
文献类型：
--
作者：
Yang, Qing;Xie, Yi;Tang, Kaibin;Niu, Haixia
使用商业镁粉作为起始材料，在没有任何催化剂或表面活性剂的情况下，通过溶剂热法制备了均匀的骨状氧化镁纳米晶体，然后进行煅烧。场发射扫描电子显微镜 (FE-SEM) 和透射电子显微镜 (TEM) 测量表明，该产品由大量长度为 120–200 nm 的骨状纳米晶体组成。这些纳米晶体两端的宽度在20-50 nm范围内，比中间部分宽3-20 nm。 X射线衍射（XRD）和选区电子衍射（SAED）分析表明产物为高质量的立方单晶纳米晶。光致发光（PL）测量表明该产品在410 nm处具有密集的发射，表明该产品在光学器件中具有潜在的应用前景。我们的方法的优点在于产率高、起始材料容易获得并且允许以低成本大规模生产。生长机制被认为与前体形成过程中溶剂的氧化以及前体分解过程中的成核和传质有关。
Uniform bone-like MgO nanocrystals have been prepared via a solvothermal process using commercial Mg powders as the starting material in the absence of any catalyst or surfactant followed by a subsequent calcination. Field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) measurements indicate that the product consists of a large quantity of bone-like nanocrystals with lengths of 120–200 nm. The widths of these nanocrystals at both ends are in the range of 20–50 nm, which are 3–20 nm wider than those of the middle parts. Explorations of X-ray diffraction (XRD) and selected area electronic diffraction (SAED) exhibit that the product is high-quality cubic single-crystalline nanocrystals. The photoluminescence (PL) measurement suggests that the product has an intensive emission centered at 410 nm, showing that the product has potential application in optical devices. The advantages of our method lie in high yield, the easy availability of the starting materials and permitting large-scale production at low cost. The growth mechanism was proposed to be related with solvent’s oxidation in the precursor formation process and following nucleation and mass-transfer in the decomposition of the precursor.
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