Martín-Ramos Pablo, Fernández-Coppel Ignacio A, Avella Manuel, Martín-Gil Jesús
Department of Agricultural and Environmental Sciences, EPS, Instituto de Investigación en Ciencias Ambientales (IUCA), University of Zaragoza, Carretera de Cuarte s/n, 22071 Huesca, Spain.
Engineering of Manufacturing Processes group, School of Industrial Engineering, University of Valladolid, C/ Francisco Mendizábal 1, 47014 Valladolid, Spain.
Nanomaterials (Basel). 2018 Jul 22;8(7):559. doi: 10.3390/nano8070559.
Transition metal oxides and chalcogenides have recently attracted great attention as the next generation of 2-D materials due to their unique electronic and optical properties. In this study, a new procedure for the obtaining of highly crystalline -MoO₃ is proposed as an alternative to vapor-phase synthesis. In this approach, a first reaction between molybdate, citrate and thiourea allowed to obtain MoS₂, which-upon calcination at a temperature of 650 °C in the presence of g-C₃N₄-resulted in MoO₃ with a definite plate-like shape. The colorless (or greenish) -MoO₃ nanoplates obtained with this procedure featured a multilayer stack structure, with a side-length of 1⁻2 μm and a thickness of several nanometers viewed along the [010] direction. The nucleation-growth of the crystal can be explained by a two-dimensional layer-by-layer mechanism favored by g-C₃N₄ lamellar template.
过渡金属氧化物和硫族化物因其独特的电子和光学性质，最近作为下一代二维材料受到了极大关注。在本研究中，提出了一种获得高结晶度MoO₃的新方法，作为气相合成的替代方法。在这种方法中，钼酸盐、柠檬酸盐和硫脲之间的第一步反应得到了MoS₂，在g-C₃N₄存在下于650℃煅烧后，得到了具有确定板状形状的MoO₃。用该方法获得的无色（或带绿色）MoO₃纳米板具有多层堆叠结构，沿[010]方向观察时，边长为1-2μm，厚度为几纳米。晶体的成核生长可以用g-C₃N₄层状模板所促进的二维逐层机制来解释。
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