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超声法制备纳米Pt/MWCNT催化剂及其在CO2传感器上的应用陈振兴,何翡翡,李改平,晋冠平合肥工业大学化工学院摘 要:采用超声合成法制备了纳米铂/多壁碳纳米管复合催化剂(Pt/MWCNT),通过场发射扫描电镜(FE-SEM),X-射线衍射(XRD)及电化学技术表征了该催化剂的性质.结果表明:纳米Pt均匀地镶嵌在MWCNTs表面,粒径为40±20nm.该催化剂对CO2的还原呈现良好的催化作用,可用作制备CO2电化学传感器,CO2在纳米铂/多壁碳纳米碳管修饰玻碳电极上的还原电流响应(Pt/MWCNTs/GCE),分别在1~10ppm和10~100ppm两个浓度范围内呈良好的线性关系,检测限为1ppm.关键词:纳米Pt/MWCNT;超声;电化学;CO2检测;......
电动汽车用LiFePO4/C电池容量衰减研究宋金保,朱晓辉,马冬梅,贺狄龙,周琳合肥国轩高科动力能源股份公司摘 要:研究了经电动汽车使用后的磷酸铁锂动力电池容量衰减原因.采用场发射电子显微镜(FE-SEM),X-射线衍射光谱仪(XRD),X-射线光电子能谱仪(XPS)和拉曼光谱等测试手段对使用后的锂离子电池电极材料进行了表征.结果表明,活性锂离子损失是电动汽车使用后锂离子电池容量衰减的最主要原因,而活性锂离子损失主要来源于SEI膜的溶解与再生,电极活性材料的损失及电解液的分解.关键词:磷酸铁锂电池;存放;工况运行;容量衰减;......
正极片的搁置时间对锂离子电池平均内阻影响研究张宝,苗萌,朱晓辉合肥国轩高科动力能源有限公司摘 要:研究了正极片的不同搁置时间对正极片电阻率及其制作的电池平均内阻变化的影响.采用场发射电子显微镜(FE-SEM),感应耦合等离子体原子发射光谱仪(ICP)及X-射线光电子能谱仪(XPS)等测试手段对正极片进行了表征.结果表明,在不同搁置时间(025h)段,正极片电阻率是受磷酸铁锂表面碳包覆层与磷酸铁锂作用力,磷酸铁锂与水反应以及粘合剂的粘合作用共同影响的.关键词:磷酸铁锂动力电池;正极片;搁置时间;......
射频反应溅射制备倾斜AlN薄膜吴雯,熊娟,杜鹏飞,陈侃松,顾豪爽湖北大学物理学与电子技术学院摘 要:采用射频反应磁控溅射方法,通过旋转转盘,使衬底与靶材水平偏离一定角度,制备了C轴择优取向的倾斜AlN薄膜.用XRD分析了不同偏转角度下制备的AlN薄膜的择优取向度,用场发射扫描电镜(FE-SEM)观察了薄膜的截面形貌,并初步讨论了倾斜AlN薄膜的生长机理.分析和测试结果表明,当转盘旋转角度为10°时,AlN薄膜柱状晶倾斜最明显,倾斜角度可达25°.关键词:C轴倾斜;AlN薄膜;射频反应溅射;......
investigated by scanning electron microscopy(SEM) and field emission scanning electron microscopy(FE-SEM).The antibacterial properties of nanocomposites were examined by minimal bactericidal concentration......
amounts of yttrium nitrate added respectively into both solutions. The micro-laminated ZrO2-Al2O3 coating is of nanostructure. FE-SEM analyses show that the cross section of the micro-laminated coatings... sections and surfaces of the micro-laminated oxide coatings were characterized with a high-resolution FE-SEM(Phillips XL-30).The composition and phases of the oxide scales formed by oxidation at 900......
alloys modified by reactive element(RE), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM... microscope(SEM) and field emission scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scattering electron(BSE) detector. For cross-section observation......
coatings were coated by DC-sputtering on the anodized surface. Microstructures and nanotube morphology of the alloys were examined by field emission scanning electron microscopy(FE-SEM) and X-ray... cm3/min. Film surface topology, chemical composition, and crystal structure were determined using FE-SEM and XRD. The corrosion behaviors were investigated using potentiostat (Model 2273, EG&G......
, and self-induced growth mechanisms involved in electroless process were confirmed by field-emission scanning electron microscopy (FE-SEM), energy dispersive spectrometry and atomic force microscopy (AFM... was investigated by field emission scanning electron microscopy (FE-SEM), and the composition of deposits was detected by energy dispersive spectrometry (EDS). Atomic force microscopy (AFM) was used to observe......
of the nanotubes were identified by means of field emission scanning electron microscopy(FE-SEM) and X-ray diffractometry(XRD). The effects of anodization parameters (concentration of electrolyte, applied voltage... of the nanotubes were observed by means of field emission scanning electron microscope (FE-SEM; LEO-1530VP). The crystal phases of prepared samples were identified by an X-ray diffractometer (XRD; D8ADVANCE with Cu......