Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen...Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen ions with the presence of alkali ions. Particularly, the outstanding advantage of these electrodes was that these electrodes were available to measure the pH of the highly corrosive system containing HF.展开更多
将一步法合成的中空介孔碳球(HMCS)修饰在丝网印刷碳电极(SPCE)上,得到了用于尼古丁电化学检测的新型电极(HMCS/SPCE)。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、粉末X射线衍射(XRD)、X射线光电子能谱(XPS)以及拉曼光谱等方法对H...将一步法合成的中空介孔碳球(HMCS)修饰在丝网印刷碳电极(SPCE)上,得到了用于尼古丁电化学检测的新型电极(HMCS/SPCE)。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、粉末X射线衍射(XRD)、X射线光电子能谱(XPS)以及拉曼光谱等方法对HMCS及修饰电极HMCS/SPCE进行表征。由于HMCS具有较大的电化学活性面积和良好的导电性,修饰电极HMCS/SPCE对尼古丁表现出良好的电催化活性。在优化实验条件下,电极HMCS/SPCE对尼古丁的检测线性范围为0~500μmol/L,灵敏度为0.850 m A/(cm^2·mmol·L^(-1)),检出限为0.058μmol/L。制备的传感器具有重复性好、稳定性高等特点,可用于实际烟草样品中尼古丁的检测。展开更多
文摘Nanosized metal oxides were recommended as pH-sensitive materials to fabricate solid pH sensors with screen printable technique. The metal oxide electrodes studied in this paper showed a better selectivity to hydrogen ions with the presence of alkali ions. Particularly, the outstanding advantage of these electrodes was that these electrodes were available to measure the pH of the highly corrosive system containing HF.
文摘将一步法合成的中空介孔碳球(HMCS)修饰在丝网印刷碳电极(SPCE)上,得到了用于尼古丁电化学检测的新型电极(HMCS/SPCE)。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、粉末X射线衍射(XRD)、X射线光电子能谱(XPS)以及拉曼光谱等方法对HMCS及修饰电极HMCS/SPCE进行表征。由于HMCS具有较大的电化学活性面积和良好的导电性,修饰电极HMCS/SPCE对尼古丁表现出良好的电催化活性。在优化实验条件下,电极HMCS/SPCE对尼古丁的检测线性范围为0~500μmol/L,灵敏度为0.850 m A/(cm^2·mmol·L^(-1)),检出限为0.058μmol/L。制备的传感器具有重复性好、稳定性高等特点,可用于实际烟草样品中尼古丁的检测。
