摘要
利用内在还原法制备了长0.7～1.2μm,宽180～250 nm的WO2.50纳米组装片。通过透射电子显微镜观察发现,该纳米组装片是由直径约45 nm的纳米粒子组装而成的。产物由WO2.00和WO2.90两相组成,具有良好的结晶度,其比表面积为13.6 m2/g。产物具有良好的导电性(电阻率为0.1Ω.cm)和与树脂的亲和性。产物的红外光谱中,νW—O吸收峰发生了33 cm-3的红移。采用热重-差示扫描量热测试技术对前驱物进行了热分析,对实验条件进行了探索,确定最佳制备温度为750℃。对WO2.50纳米组装片的形成机理作了探讨,将其应用在导电涂料领域,测得漆膜的表面电阻率为5Ω.cm。
The mixed valence oxide WO2.50 assembled flake was synthesized through internal redox method. Transmission electron microscope （TEM） observations indicated that the product was 0. 7 - 1.2μm long and 180-250 nm wide, which was assembled from nanoparticles with a diameter of about 45 nm. The product contained two phases, WO2.00 and WO2.90, and had a good crystallinity, and its specific surface area was 13.6 m^2/g. The product had good conductivity （ the resistivity was 0. 1Ωcm） and affinity for resin. The absorption peak of the product in the FT-IR spectrum had a ＂red shift＂ of 33 cm^-1 The thermochemistry of the precursor has been studied by TG-DSC, and the best reaction temperature was found to be 750 ℃. The formation mechanism of the WO250 assembly flake was proposed. The WO2.50 asembled flake was applied in conductive coating field for the first time and the resistivity of the coating film was 5 Ω m.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第4期439-442,共4页
Chinese Journal of Applied Chemistry
关键词
纳米材料
混合价钨氧化物
导电涂料
nanomaterials
mixed valence tungsten oxide
conductive coating
