不同表面活性剂对CoSb_3纳米粉体的影响及其非晶化研究
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摘要
分别选用不同的表面活性剂(SDBS、CTAB、EDTA、PVP),采用水热法成功制备CoSb_3纳米粉体.对制备的纳米粉体分别进行XRD和SEM表征,研究了不同表面活性剂对制备的CoSb_3纳米粉体的影响.结果表明不同表面活性剂对制备的CoSb_3纳米粉体形貌有显著的影响.并将水热法制备的CoSb_3纳米粉体,采用脉冲激光非晶化技术进行处理,结果表明纳米粉体实现了部分非晶化.通过样品的XRD分析研究了影响CoSb_3纳米粉体部分非晶化的条件,结果表明扫描重复次数的增加可以提高CoSb_3基方钴矿热电材料的非晶化能力,适当提高扫描速度有利于CoSb_3基方钴矿热电材料的非晶化.
The CoSb_3 nanopodwers were synthesized by the hydrothermal method using different surfactants which were Cetyltrimethyl Ammonium Bromide(CTAB),Ethylene Diamine Tetraacetic Acid(EDTA),sodium dodecyl benzene sulfonate(SDBS) and Polyvinyl Pyrrolidone(PVP). The phase structure and micro-topography of the nanopowders were investigated by X-ray diffractometer(XRD) and a fileld-emission scanning electron microscopy(FESEM).The result showed that different surfactants had significant influence on the morphologies of CoSb_3 nanopodwers. Laser rapid quenching method was used to deal with CoSb_3 nanopowders that synthesized by the hydrothermal method in order to achieve partial amorphization of the CoSb_3.The amorphous conditions of CoSb_3 were investigated by the XRD. The results showed that(1) with the increase of the scanning number,the amorphous level of CoSb_3 raised;(2) Increasing the scanning speed properly could be helpful to increase the amorphous level of CoSb_3.
The CoSb_3 nanopodwers were synthesized by the hydrothermal method using different surfactants which were Cetyltrimethyl Ammonium Bromide(CTAB),Ethylene Diamine Tetraacetic Acid(EDTA),sodium dodecyl benzene sulfonate(SDBS) and Polyvinyl Pyrrolidone(PVP). The phase structure and micro-topography of the nanopowders were investigated by X-ray diffractometer(XRD) and a fileld-emission scanning electron microscopy(FESEM).The result showed that different surfactants had significant influence on the morphologies of CoSb_3 nanopodwers. Laser rapid quenching method was used to deal with CoSb_3 nanopowders that synthesized by the hydrothermal method in order to achieve partial amorphization of the CoSb_3.The amorphous conditions of CoSb_3 were investigated by the XRD. The results showed that(1) with the increase of the scanning number,the amorphous level of CoSb_3 raised;(2) Increasing the scanning speed properly could be helpful to increase the amorphous level of CoSb_3.
引文
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[8]JIAN X,ZHAO X B,MI J L,et al.Solvothermal synthesis of nanosized CoSb3skutterudite[J].Journal of Zhejiang University-Science B,2004,5(12):1504-1508.
[9]LI J Q,FENG X W,SUN W A,et al.Solvothermal synthesis of nano-sized skutterudite Co4-xFexSb12powders[J].Materials Chemistry and Physics,2008,112(1):57-62.
[10]VENKATASUBRAMANIAN R,SIIVOLA E,COLPITTS V,et al.Thin-film thermoelectric devices with high room-temperature figures of merit[J].Nature,2001,597(413):579-602.
[11]YANG L,HNG H H,CHENG H,et al.Synthesis of CoSb3by a modified polyol process[J].Materials Letters,2008,62(16):2483-2485.
[12]MI J L,ZHAO X B,ZHU T J,et al.Solvothermal synthesis and electrical transport properties of skutterudite CoSb3[J].Journal of Alloys and Compounds,2006,417(2):269-272.
[13]XIE J,ZHAO X B,CAO G S,et al.Solvothermal synthesis and electrochemical performances of nanosized CoSb3as anode materials for Li-ion batteries[J].Journal of Power Sources,2005,140(2):350-354.
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[15]ZHAO Q,WANG Y G.A facile two-step hydrothermal route for the synthesis of low-dimensional structured Bi2Te3nanocrystals with various morphologies[J].Journal of Alloys and Compounds,2010,497(2):57-61.
[16]KUMARI L,LI W Z,HUANG J Y,et al.Solvothermal synthesis,structure and optical property of nanosized CoSb3skutterudite[J].Nanoscale Research Letter,2010,5(10):1698-170.