以MoO_3粉末和石墨为原料,用气相传输方法制备MoO_2微/纳米片,并对其形貌、结构及光学性能进行了分析和表征.结果表明,用气相法制备的矩形薄片状MoO_2,长和宽在几微米到几十微米之间,厚度约为200 nm.MoO_2微/纳米片在波长200-300 nm的紫外光范围内有较强的吸收带,在304.6 nm、343.4 nm和359.6 nm处有较强的发光峰.根据实验分析和热力学理论,探讨了MoO_2微/纳米片的生长机理.
MoO_2 micro/nanosheets were synthesized by vapor-deposit process and characterized by XRD, SEM, TEM, UV-Vis and photoluminescence (PL) photometer. The results show that MoO_2micro/nanosheet is rectangle, and the length and width range from several to dozens of micrometers and about 200 nm thick. The MoO_2 micro/nanosheets have absorbance peaks between 200-300 nm, and three fluorescent excitations at 304.6, 343.4 and 359.6 nm. The synthesis mechanism of MoO_2 micro/nanosheets was discussed based on the experimental results and the thermodynamic computation.
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