Ultrafine metal–organic framework @ graphitic carbon with MoS2-CNTs nanocomposites as carbon-based electrochemical sensor for ultrasensitive detection of catechin in beverages

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2024-12-28 DOI:10.1007/s00604-024-06901-4

Yilin Wang, Zixia Zhao, Yuefan Wang, Zhifang Liu, Leyao Chen, Jin Qi, Yixi Xie, Pengcheng Zhao, Junjie Fei

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Abstract

GO/Co-MOF/PPy-350 (GPC-350) was synthesized by in situ growth of ultrafine Co-MOF on graphene oxide (GO), followed by encapsulation with polypyrrole (PPy) and calcination at 350.0℃. Meanwhile, MoS₂-MWCNTs (MoS₂-CNTs) were produced via the in situ synthesis of MoS₂ within multi-walled carbon nanotubes (MWCNTs). The electrochemically superior GPC-350/MoS₂-CNTs nanocomposite was then achieved by combining GPC-350 with MoS₂-CNTs. The polypyrrole encapsulation serves to protect the ultrafine Co-MOF, preventing its degradation during the calcination process. The linear detection range of the GPC-350/MoS₂-CNTs/GCE sensor for the determination of catechin (CA) in phosphate buffered saline (PBS) was from 5.0 to 1800.0 nM with a limit of detection of 1.78 nM. In addition, the materials were characterized using SEM, EDX, TEM, XRD, EIS, XPS, FTIR, and Raman. These results indicate that the synthesis of GPC-350/MoS₂-CNTs nanocomposites is successful and CA in beverages samples can be effectively detected using electrochemical sensors. Additionally, the reaction mechanism of CA was explored through cyclic voltammetry. The application of GPC-350/MoS₂-CNTs nanocomposites in sensor technology offers innovative approaches for the ultrasensitive detection of flavonoids.

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文献相关原料

公司名称

产品信息

阿拉丁

potassium hexacyanocobaltate

阿拉丁

pyrrole

阿拉丁

ammonium persulfate

阿拉丁

C4H6N2

阿拉丁

CoCl2

阿拉丁

CH4N2S

阿拉丁

Na2MoO4·2H2O

来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.