摘要
采用V2O5和硼酸为原材料,草酸为还原剂,在水热条件下,成功制备出硼(B)掺杂VO2(B)纳米棒,经Ar气环境退火后,得到了V1-xBxO2(M)系列样品。样品的结构、形貌和相转变温度分别用X-射线粉末衍射(XRD)仪、扫描电子显微镜(SEM)和差示扫描量热仪(DSC)等进行表征。用X-射线光电子谱(XPS)来表征样品的组份和元素的价态,样品的红外光吸收谱也被测量。结果显示,当B掺杂达到2.0at%时,V1-xBxO2(M)相的转变温度升高到75.03℃。这个升高的相转变温度可归因于B3+替代V4+引起VO6八面体的晶格畸变,以及局域晶格电子密度的降低。
The Boron-doped VO2 （B） nanorods were synthesized via hydrothermal method using V_2O_5, boron acid and oxalic acid as raw materials. The V_1-xB_xO_2 （M） samples were obtained by the post- annealed the B-doped VO_2 （B） nanorods in argon. The structures, morphologies and optical properties were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and differential scanning calorimetry （DSC）. The composition of the nanorods and the oxidation state of the vanadium were investigated by X-ray photoelectron spectroscopy （XPS）, the infrared absorption spectrum of the B- doped VO_2 were also measured. The results indicate that the phase transition temperature of V_1-xB_xO_2 （M） samples increased to 75.03 ℃ for the Boron content being 2.0at%. This increase of the phase transition temperature in B-doped VO_2 （M） could be ascribed to the lattice distortion of VO6 octahedra and/or lower local electron density in VO_2 （M） lattice where V^4＋ are substituted by B^3＋.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第2期409-414,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(11174001
11174002)
安徽省教育厅自然科学基金(KJ2013A030)
关键词
硼掺杂VO_2
水热合成
相转变温度
光学特性
B doped-VO_2
hydrothermal synthesis
phase transition temperature
optical property
