热处理对热电Bi_(2)Te_(2.7)Se_(0.3)“纳米花”材料形貌的影响  

Effect of Thermal Treatment on the Morphology of Flower-Shaped Bi_(2)Te_(2.7)Se_(0.3) Thermoelectric Materials

作　　者：李晓龙 周春生[1] 杨超普 李哲建[1] 邸友莹[1] 李峰 王晴玉 郭明[2] Li Xiaolong;Zhou Chunsheng;Yang Chaopu;Li Zhejian;Di Youying;Li Feng;Wang Qingyu;Guo Ming(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China;School of Environment&Municipal Engineer,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]商洛学院陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《稀有金属材料与工程》2021年第11期3966-3970,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(21873063);商洛学院科研基金(19SKY001)。

摘　　要：采用bottom-up技术之一的模板辅助电化学沉积技术制备纳米材料,在ITO导电玻璃上电化学恒电位沉积制备了一种由纳米线变异为纳米带,进而构成的“纳米花”形貌的热电材料。采用XRD、FESEM、EDS技术手段对纳米花物相、形貌及成分进行了研究,探讨了热电纳米花材料的形成机理,模拟了纳米花形成过程。结果表明,纳米花是Bi_(2)Te_(2.7)Se_(0.3)热电材料经过2个阶段形成的。首先是纳米线在热处理过程逐渐形成纳米带,然后由纳米带收缩形成纳米花;热处理条件对纳米花的形成起到决定性的作用。Following the AAO-assisted electrochemical deposition,one of the bottom-up technologies,the flower-shaped nanomaterials consisted of nanobelts and nanowires were fabricated on ITO-coated glass substrate by electrodeposition.The morphology,phase structure and composition of the as-prepared nanomaterials were analized by FESEM,XRD and EDS,respectively.Moreover,the forming process was simulated.The results show that the nano-flowers are Bi_(2)Te_(2.7)Se_(0.3) thermoelectric materials,and they are fabricated through the two steps:first,nanowires forming gradually into nanobelts during the couse of thermal treatment;second,nanobelts contracting into nano-flowers.In addition,the conditions of thermal treatment play the determined role on the forming of flower-shaped Bi_(2)Te_(2.7)Se_(0.3) thermoelectric materials.

关 键 词：纳米花 机理 热处理 热电材料 

分 类 号：TB383[一般工业技术—材料科学与工程]