One-Pot Synthesis of Hierarchically Assembled Tungsten Oxide (Hydrates) Nano/Microstructures by a Crystal-Seed-Assisted Hydrothermal Process

作者：Wang Jinmin; Lee Pooi See^*; Ma Jan

来源：Crystal Growth & Design, 2009, 9(5): 2293-2299.

DOI：10.1021/cg801097w

Hierarchically assembled tungsten oxide (hydrates) nano/microstructures were synthesized by a crystal-seed-assisted hydrothermal process. Crystal seeds were prepared by refluxing the sol formed by oxidation reaction between W and H(2)O(2). NaCl was used as the capping agent. The assembled nano/microstructures could be controlled to form multiple morphologies: double-layer nano/microbundles, quasi-nanorod arrays, nanorod-spheres, double-layer nano/microdisks and double-layer six-pod prisms. Their morphologies and phase compositions are dependent on crystal seeds, substrate, and precursor concentration. Hierarchical assembly mechanisms are proposed for the formation of the assembled nano/microstructures. The assembled double-layer nano/microstructures are composed of two different phases Of tungsten oxide (hydrates), which represent new cases for two-phase nano/microstructures.

• 单位
  南阳理工学院