W掺杂纳米M相VO_(2)的水热合成及其相变性能  

Hydrothermal synthesis and phase transformation properties of W-doped VO_(2)(M)nanoparticles

作　　者：杨雪 邹建[1] Yang Xue;Zou Jian(School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学化学化工学院,重庆400715

出　　处：《钢铁钒钛》2022年第6期24-30,共7页Iron Steel Vanadium Titanium

基　　金：重庆市基础与前沿研究计划项目(cstc2016jcyjA0027);中央高校基本科研业务费项目(XDJK2020B026)。

摘　　要：以偏钒酸铵为钒源,水合肼为还原剂,偏钨酸铵为掺杂剂,采用一步水热法在280℃制备了掺W量(原子分数表示)从0到2.0%的VO_(2)粉体,并将其加入到聚氨酯中,制备VO_(2)/PU复合薄膜。通过XRD、TEM、XPS、DSC对合成的样品进行了物相组成、形貌、元素价态和相变性能分析,利用紫外-可见-近红外光谱仪测定了薄膜的透射率。结果表明:随着W掺杂量从0增加到2.0%,二氧化钒升温时的相变温度从61.8℃降低至15℃。基于掺杂1.0%的二氧化钒粉体制备的VO_(2)/PU复合薄膜,ΔT_(sol)可达11.7%,基本满足智能窗的实际应用要求。In this paper,using ammonium metavanadate as the vanadium source,hydrazine monohydrate as the reducing agent and ammonium metatungstate as the dopant,the VO_(2)powder doped with W from 0.0 to 2.0 at%was prepared by one-step hydrothermal method at 280℃,and was added to polyurethane to prepare VO_(2)/PU composite films.XRD,TEM,XPS and DSC were used to analyze the phase composition,morphology,element valence state and phase transformation performance of the synthesized samples.The transmittance of the films was measured by UV-Vis-NIR spectrometer.The results show that with W doping increasing from 0.0 to 2.0 at%,the phase transition temperature of vanadium dioxide decreases from 61.8℃to 15℃.The composite film based on 1 at%W-doped vanadium dioxide powder shows a good solar modulating ability(ΔT_(sol)=11.7%),which meets the practical application requirements of intelligent windows.

关 键 词：二氧化钒 一步水热法 钨掺杂 相变性能 薄膜 

分 类 号：TF841.3[冶金工程—有色金属冶金] TB34[一般工业技术—材料科学与工程]