当前位置: X-MOL 学术Appl. Surf. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Significant influence of controllable surface oxygen vacancies of CuO for enhancing sensitivity of glucose detection
Applied Surface Science ( IF 6.7 ) Pub Date : 2021-10-23 , DOI: 10.1016/j.apsusc.2021.151649
Shengbao Wang 1, 2 , Huijuan Yang 1, 2 , Xiaoyu Yi 1, 2 , Hirbod Maleki Kheimeh Sari 1, 2 , Xuan Zhang 3 , Tao Wang 4 , Zhiyou Zhou 4 , Bin Cao 1, 2 , Jian Qin 1, 2 , Jingjing Wang 1, 2 , Wenbin Li 1, 2 , Xifei Li 1, 2
Affiliation  

The construction of oxygen vacancies, as one of defects engineering, is a promising strategy to boost the electrocatalytic activity. Herein, CuO nanoflakes enriched with oxygen vacancies were successfully synthesised via a simple one-pot method with stirring. High-angle annular dark-field scanning, X-ray photoelectron spectroscopy and electron spin resonance spectroscopy were performed to confirm the existence of enriched oxygen vacancies. The as-synthesised CuO nanoflakes enriched with oxygen vacancies and exhibited an excellent performance for glucose detection with a lower onset-potential of +0.22 V, ultrahigh sensitivity of 4870 μA mM−1 cm−2 and low detection limit of 0.5 μM. The superior performance of the CuO nanoflakes may be attributed to surface oxygen vacancies, which accelerate the adsorbed hydroxyl ions to promote the formation of Cu3+ species, thereby, reducing the one-potential and facilitating the glucose oxidation. This work would serve the guide for the rational design of other efficient catalysts for glucose detection via constructing oxygen vacancies.



中文翻译:

CuO可控表面氧空位对提高葡萄糖检测灵敏度的显着影响

氧空位的构建作为缺陷工程之一,是提高电催化活性的一种很有前景的策略。在此,通过简单的搅拌一锅法成功合成了富含氧空位的 CuO 纳米薄片。进行了高角度环形暗场扫描、X 射线光电子能谱和电子自旋共振光谱,以确认富氧空位的存在。合成的 CuO 纳米薄片富含氧空位并表现出优异的葡萄糖检测性能,起始电位为 +0.22 V,超高灵敏度为 4870 μA mM -1 cm -2和 0.5 μM 的低检测限。CuO纳米薄片的优异性能可能归因于表面氧空位,其加速吸附的氢氧根离子促进Cu 3+物种的形成,从而降低一电位并促进葡萄糖氧化。这项工作将为通过构建氧空位合理设计其他用于葡萄糖检测的有效催化剂提供指导。

更新日期:2021-10-28
down
wechat
bug