材料科学
兴奋剂
光电子学
纳米线
钒
纳米结构
化学工程
纳米技术
氧化钒
纳米棒
电极
作者
Muhammad Hussain,Amjad Nisar,Shafqat Hussain,Lizhi Qian,Shafqat Karim,Yanguo Liu,Amina Zafar,Hongyu Sun,Mashkoor Ahmad
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-10-01
卷期号:33 (2): 025502-
标识
DOI:10.1088/1361-6528/ac2c44
摘要
The development of a reliable non-enzymatic multi-analyte biosensor is remained a great challenge for biomedical and industrial applications. In this prospective, rationally designed electrode materials having voltage switchable electrocatalytic properties are highly promising. Here, we report vanadium doped ZnO engineered nanostructures (Zn1-xVxO where 0 ≤ x ≤ 0.1) which exhibit voltage switchable electrocatalytic properties for accurate measurements of glucose and hydrogen peroxide. Microstructures and chemical analysis show that the oxygen vacancies in the material can be tuned by controlling the stoichiometric ratios which play key role for voltage dependent measurements of different analytes. The developed Zn1-xVxO nanostructures exhibit outstanding sensing ability for binary analytes with a high selectivity, low detection limit, thermal stability and long-term stability. The Zn0.9V0.1O/glassy carbon (GC) electrode shows 3-fold increase in reproducible sensitivity for both glucose (655.24μA mM-1cm-2) and H2O2(13309.37μA mM-1cm-2) as compared to the pristine ZnO/GC electrode. Moreover, the electrode also shows good response for human blood serum and commercially available samples. The results demonstrate that defect engineering is a promising route for the development of cost-effective non-enzymatic multi-analyte sensors for practical applications.
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