摘要
以硝酸钴、硝酸锌、尿素、氟化铵为原料,泡沫镍为基体,在水热法的基础上,利用两性金属的特点,通过引入Zn^(2+)离子,并结合碱洗过程,在泡沫镍基体表面合成了高纯度独特的棱柱状Co_(3)O_(4)纳米团簇纤维。制备的Co_(3)O_(4)/Ni电极的形貌及成分通过扫描电子显微镜与X射线衍射进行了表征,电极的电化学性能利用循环伏安法与计时电流法测试,测试均在1mol/L KOH溶液中进行。结果表明:利用Zn^(2+)诱导在泡沫镍表面制备的Co_(3)O_(4)呈现一种棱柱状纳米团簇纤维结构。这种结构的Co_(3)O_(4)纳米材料具有高的比表面积,在对葡萄糖检测过程中表现出优越的电化学性能,当其作为电极,表现出检测灵敏度高[23430μA/(mmol/L·cm^(2))],检出限低(1.547μmol/L)和线性检测范围宽(0~2.75mmol/L)的特点。抗干扰实验在+0.5Vvs.SCE进行,结果显示制备的Co_(3)O_(4)/Ni电极对葡萄糖具有优异的选择性。因此可应用于无酶葡萄糖传感器的电极材料来改善现有无酶葡萄糖传感器材料响应范围小,灵敏度低等问题。
Co_(3)O_(4)with high-purity and unique prismatic structure were synthesized on the surface of the nickel foam based on hydrothermal method with combination of alkali washing.Which used cobalt nitrate,zinc nitrate,urea and ammonium fluoride as raw materials,and nickel foam as matrix,meanwhile amphoteric Zn^(2+)ions were added.The composition and morphology of the Co_(3)O_(4)/Ni electrode was characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM),and the electrochemical properties of the fabricated Co_(3)O_(4)/Ni heterostructure-based glucose sensor were detected in 1 M KOH solution by the cyclic voltammetry(CV)and chronoamperometry methods.The results showed that synthesized Co_(3)O_(4)on the surface of nickel foam had prismatic nano-cluster fibrous structure.This nano-cluster Co_(3)O_(4)based electrode had a high specific surface area,and showed excellent electrochemical performance in the process of glucose detection.As an electrode,the Co_(3)O_(4)/Ni heterostructure showed high detection sensitivity[23430μA/(mmol/L·cm^(2))],low detection limit(1.547μmol/L)and wide linear detection range(0~2.75 mmol/L).Anti-interference tests showed that the prepared electrode had good selectivity to glucose at+0.5 Vvs.SCE.Therefore this Co_(3)O_(4)/Ni based electrode can be used as electrode material of non-enzyme glucose sensor,and solved the problem of low sensitivity and small response range existing in non-enzyme glucose sensor materials.
作者
赵宙
张崇
田园
刘志
徐宏妍
Zhao Zhou;Zhang Chong;Tian Yuan;Liu Zhi;Xu Hongyan(Material Science and Engineering Institute,North University of China,Taiyuan 030051)
出处
《化工新型材料》
CAS
CSCD
北大核心
2021年第2期117-121,共5页
New Chemical Materials
基金
山西省回国留学人员科研资助项目(2017-094)
山西省重点研发计划(指南)项目(201703D421008)。
