以PB为模板,在玻碳电极上层层电沉积普鲁士蓝（PB）-金复合物,制备了多孔金膜（AuPB）修饰电极.用电化学和扫描电子显微镜对该多孔金膜修饰的电极进行表征,结果表明该膜具有高表面积和粗糙度.并将其应用于高灵敏三价砷的电化学检测.在...以PB为模板,在玻碳电极上层层电沉积普鲁士蓝（PB）-金复合物,制备了多孔金膜（AuPB）修饰电极.用电化学和扫描电子显微镜对该多孔金膜修饰的电极进行表征,结果表明该膜具有高表面积和粗糙度.并将其应用于高灵敏三价砷的电化学检测.在最优条件下,电化学线性扫描阳极溶出伏安法（LSASV）响应峰电流与样品中的砷（Ⅲ）在0.075~5μmol/L浓度范围内成线性关系;灵敏度为1.4 k A/mol,检测限（S/N=3）为8.5 nmol/L.该修饰电极对As（Ⅲ）分析具有响应范围宽、灵敏度高、操作简便以及良好稳定性的特点.展开更多
A unique sulfonated polyaniline/vanadate composite was synthesized and utilized as a composite anode in microbial fuel cells on ocean floor (BMFCs). X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were em...A unique sulfonated polyaniline/vanadate composite was synthesized and utilized as a composite anode in microbial fuel cells on ocean floor (BMFCs). X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were employed to characterize its chemical composition and morphology. Wettability of the composite anodes decreases due to the addition of polytetrafluoroethylene (PTFE). The electrochemical behavior of the composite anodes was investigated by means of linear sweep voltammetry and Tafel plot measurements. Compared with the plain graphite anode,the composite anode significantly improves the power density,5.5-fold higher,reaching 187.1 mW/m2 and gives a 27-fold higher exchange current density and a higher kinetic activity. A novel synergistic mechanism between sulfonated polyaniline and vanadate is proposed to explain the excellent electrochemical performance. This composite thus has great potential to be used as an anode material for a high-power BMFC.展开更多
文摘以PB为模板,在玻碳电极上层层电沉积普鲁士蓝（PB）-金复合物,制备了多孔金膜（AuPB）修饰电极.用电化学和扫描电子显微镜对该多孔金膜修饰的电极进行表征,结果表明该膜具有高表面积和粗糙度.并将其应用于高灵敏三价砷的电化学检测.在最优条件下,电化学线性扫描阳极溶出伏安法（LSASV）响应峰电流与样品中的砷（Ⅲ）在0.075~5μmol/L浓度范围内成线性关系;灵敏度为1.4 k A/mol,检测限（S/N=3）为8.5 nmol/L.该修饰电极对As（Ⅲ）分析具有响应范围宽、灵敏度高、操作简便以及良好稳定性的特点.
基金supported by the Scientific and Technological Development Plan Project of Shandong Province, China (2008GG10007003)the Key Laboratory of Marine Environment & Ecology, Ministry of Education (2008010)the Key Laboratory of Submarine Geoscience and Exploring Technology of Ministry of Education, Ocean University of China (2008-01)
文摘A unique sulfonated polyaniline/vanadate composite was synthesized and utilized as a composite anode in microbial fuel cells on ocean floor (BMFCs). X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were employed to characterize its chemical composition and morphology. Wettability of the composite anodes decreases due to the addition of polytetrafluoroethylene (PTFE). The electrochemical behavior of the composite anodes was investigated by means of linear sweep voltammetry and Tafel plot measurements. Compared with the plain graphite anode,the composite anode significantly improves the power density,5.5-fold higher,reaching 187.1 mW/m2 and gives a 27-fold higher exchange current density and a higher kinetic activity. A novel synergistic mechanism between sulfonated polyaniline and vanadate is proposed to explain the excellent electrochemical performance. This composite thus has great potential to be used as an anode material for a high-power BMFC.
