A high sensitivity strategy of nitrite detection based on CoFe@NC nanocubes modified glassy carbon electrode

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2023-06-27 DOI:10.1007/s42823-023-00558-4

Yanjiao Zou, Hongfei Gu, Jingjing Yang, Ting Zeng, Juan Yang, Yuanyuan Zhang

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引用次数: 0

Abstract

In the present study, an innovative electrochemical sensing platform was established for sensitive detection of NO₂^—. This sensor was developed using CoFe alloy encapsulated in nitrogen-doped carbon nanocubes (named as CoFe@NC-NCS), synthesized through the calcination of polydopamine-coated CoFe Prussian-blue analogues (CoFe-PBA@PDA). The morphological and electrochemical characterization reveals that the CoFe@NC-NCS possesses high electrocatalytic activity for electrochemical quantitation of NO₂^—, ascribed to the huge surface area and plentiful active positions, benefiting from the porous, hollow, and core–shell structure of CoFe@NC-NCS. Under the optimal conditions, CoFe@NC-NCS/GCE possessed remarkable sensing performance for NO₂^— with wide liner ranges and a detection limit of 0.015 μM. NO₂^— recovery experiments in real samples exhibited recoveries in the range of 98.8–103.5%. Hence, the CoFe@NC-NCS shows great promise for the construction of electrochemical sensor with more potential application.

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基于CoFe@NC纳米立方修饰玻碳电极的亚硝酸盐高灵敏度检测策略

在本研究中，建立了一个创新的电化学传感平台，用于NO2 -的灵敏检测。该传感器是用包裹在氮掺杂碳纳米立方(命名为CoFe@NC-NCS)的CoFe合金开发的，通过煅烧聚多巴胺包覆的CoFe普鲁士蓝类似物(CoFe-PBA@PDA)合成。形貌和电化学表征表明，CoFe@NC-NCS具有较大的表面积和丰富的活性位点，得益于CoFe@NC-NCS的多孔、中空和核壳结构，对NO2 -的电化学定量具有较高的电催化活性。在最优条件下，CoFe@NC-NCS/GCE对NO2 -具有良好的传感性能，线性范围宽，检出限为0.015 μM。实际样品中NO2 -的回收率为98.8 ~ 103.5%。因此，CoFe@NC-NCS显示了构建电化学传感器的巨大前景，具有更大的应用潜力。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.