Molten salt solvent synthesis of La₂Mo₂O₉ nano-wires by controlling the subsequent calcinations process

Large amounts of La₂Mo₂O₉ nano-wires have been produced using molten-salt synthesis method. The powder X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy are used to investigate structure and morphological features of the obtained products. The formed nano-wires have an average diameter of about 100 nm and a length in the range from ten to several tens of micrometers. The analyses of the high resolution transmission electron microscopy and the selected area electron diffraction results show that the nano-wires are single crystalline and grow along the [0 0 1] direction. A growth mechanism of La₂Mo₂O₉ nano-wires is also proposed in this report. It implies that the temperature, chloride ions and cation lattice in β-La₂Mo₂O₉ might be related to the particles morphologies transition. - Highlights: • La₂Mo₂O₉nano-wires are successfully synthesizedand first reported in this paper. • The influences of possible factors on nano-wires synthesis are discussed. • The possible mechanism was discussed