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陈春年 《武汉理工大学学报(材料科学英文版)》2013,28(5):990-996
Fe2O3@polypyrrole nanotubes (Fe2O3@PPy nanotubes) have been successfully prepared by in-situ polymerization of the pyrrole on the surface of Fe2O3 nanotubes (Fe2O3-NTs), via using L-Lysine as modified surfactant. Hollow PPy nanotubes were also produced by dissolution of the Fe2O3 core from the core/shell composite nanotubes with 1 mol·L?1 HCl. Scanning electron microscopy(SEM), transmission electron microscope (TEM), selective-area electron diffraction (SAED), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy(FT-IR) confirmed the formation of Fe2O3-NTs and Fe2O3@PPy core/shell nanotubes. Its catalytic properties were investigated under the ultrasound. The results of UV-vis spectroscopy (UV) demonstrated Rhodamine B (RhB) can be efficiently degraded by Fe2O3 @PPy nanotubes. 相似文献
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采用传统固相反应法制备了Zn掺杂的Ni0.5Mn2.38–x Cu0.12Znx O4(x=0,0.2,0.4,0.6,0.8)系列MF58型NTC热敏电阻工业化产品,使用XRD、SEM、XPS等技术手段表征了所制陶瓷烧结体的晶体结构、微观结构和成分,重点考察了Zn元素含量对热敏电阻电学性能和老化值的影响。结果表明:随着Zn含量的增加,Ni0.5Mn2.38–x Cu0.12Znx O4固溶体的晶体结构从立方尖晶石转变成四方尖晶石,样品的电阻率和热敏常数B值呈现逐步增加的趋势,同时老化值显著减小,当x=0.8时,其在150℃放置6天后的老化值可低至0.33%。 相似文献
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采用共沉淀法以Ni-Mn-O系为基础,通过引入Mg元素,制备Ni0.6Mn2.4-xMgxO4(x=0、0.15、0.30、0.45、0.60)NTC陶瓷产品.运用XRD、SEM和电化学测试等手段,系统研究了镁掺杂对样品的结构和电化学性能的影响.结果表明:随着Mg含量的增加,样品的主相仍是尖晶石结构,晶胞参数逐渐减小.随着Mg的掺杂量由0增加到0.60,Ni-Mn-O系NTC热敏电阻的电阻率由2032Ω·cm增加到7280Ω·cm,材料常数由3728 K增加到3983 K. 相似文献
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