光子学报, 2019, 48 (3): 0316004, 网络出版: 2019-04-02
MoO3/MoS2复合结构的制备及其光致变色性能
Preparation and Photochromic Properties of MoO3/MoS2 Composite Structures
摘要
以Na2MoO4·2H2O和C2H5HS为原料, 采用水热法和光照法制备了MoO3/MoS2复合结构.使用透射电子扫描显微镜、X射线衍射、X射线光电子能谱仪和紫外可见分光光度计等手段表征了样品的形貌、结构和光致变色性能.结果表明：所制备的样品呈纳米线束状结构.当Na2MoO4·2H2O和C2H5HS比例为1∶3时, 样品呈黄色; 当Na2MoO4·2H2O和C2H5HS比例为1∶3以下时, 样品呈蓝色.所制备样品具有光致变色效应, 当Na2MoO4·2H2O和C2H5HS比例为1∶2时, 材料的光致变色性能最好.优异的光致变色性能归因于MoO3/MoS2复合结构具有合适的能带结构, 从而有效地分离光生载流子, 抑制了电子和空穴的复合.
Abstract
MoO3/MoS2 composite structure was prepared by hydrothermal and illumination method. The morphology, structure and photochromic properties of the samples were characterized by TEM, XRD, XPS and UV-Vis spectrophotometer. The samples show nanowire bundle structure. The color of the sample is yellow with the ratio of Na2MoO4·2H2O to C2H5HS is 1∶3. While the color of the samples are blue when the ratio of Na2MoO4·2H2O to C2H5HS is below 1∶3. The prepared samples have photochromic effect. The photochromic property of MoO3/MoS2 is the best with the ratio of Na2MoO4·2H2O to C2H5HS is 1∶2. The excellent photochromic efficiency is attributed to the appropriate band structure of MoO3/MoS2 composite structure, which can effectively separate photogenerated carriers and suppressed the recombination of electrons and holes.
吴克跃. MoO3/MoS2复合结构的制备及其光致变色性能[J]. 光子学报, 2019, 48(3): 0316004. WU Ke-yue. Preparation and Photochromic Properties of MoO3/MoS2 Composite Structures[J]. ACTA PHOTONICA SINICA, 2019, 48(3): 0316004.
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