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两种纳米结构VO₂（B）的合成、表征和生长机理的研究

Study on Synthesis of VO₂ Nanocrystalline,Characterization and Developing Mechanisms

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【Author】 Luo Min, Gao Jiqiang, Zhang Xiao, Ouyang Da, Zhu Jianfeng, Song Weiming, Hu Qilin (State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049, China; School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China)

【机构】西安交通大学金属材料强度国家重点实验室；宁夏大学化学化工学院；宁夏大学化学化工学院陕西西安 710049 宁夏大学化学化工学院；宁夏银川 750021；陕西西安 710049；

【摘要】在水热条件下,分别以表面活性剂十二烷基苯磺酸钠(SDBS)和十六烷基三甲基溴化胺(CTAB)为软模板合成了VO2纳米粉和纳米针,用SEM,TEM,XRD表征了材料的表面形貌和晶体结构．结果表明,产物的晶体结构为单斜相结构VO2(B),纳米粉的粒径为50-100nm,纳米针直径为50-100nm,长为1-2μm,水热时间和表面活性剂的种类对产物的形貌及大小起到了调控作用;同时对不同形貌VO2纳米晶的形成机制进行了理论探讨．更多还原

【Abstract】 Vanadium dioxide nanoparticles and nanorods have been synthesized from V2O5 sol and sodium dodecylbenzenesulphonate (SDBS) or ammonium salt (CTAB) as structure-directing templates under hydrothermal conditions, respectively. Surfactant templates were demonstrated to be appropriate for the formation of vanadium dioxide nanocrystalline. The samples were characterized by XRD, TEM, SEM. The results indicate that the nanocrystalline obtained was VO2(B) crystal structure. In the SDBS-assisted hydrothermal process, the VO2 nanoparticles with diameters of 50-100 nm had been obtained In the CTAB-assisted hydrothermal process, the VO2 nanorods with diameters of 50-100 nm and lengths of 1-2 μm had been successfully synthesized The probable formation mechanisms of the vanadium dioxide are also discussed.更多还原