期刊
TALANTA
卷 225, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2020.122050
关键词
Organic-inorganic perovskite; Carbon nanodots; Photoelectrochemical sensor; Cholesterol
资金
- NSFC [21675140, 21705141, 22076161]
- Natural Science Foundation of Jiangsu Province [BK20181219]
- 14th Six talent peaks project in Jiangsu Province [SWYY-085]
- Young academic leaders of Jiangsu Province (2018)
- Talent Support Program of Yangzhou University
- Higher Education Outstanding Scientific and Technological Innovation Team of Jiangsu Province [2017-6]
- PAPD
- TAPP
- Open Project Program of Jiangsu Key Laboratory of Zoonosis [R2013]
The study introduced carbon nanodots and polyvinylidene fluoride as additives into perovskite to prepare a composite with improved water tolerance and mechanical stability, which was applied in photoelectrochemical sensing for cholesterol detection with a detection limit lower than most methods. This platform may have potential applications for other analytes and could contribute to enhancing the performance of organic-inorganic perovskites.
Herein, we reported the introduction of carbon nanodots (CNDs) and polyvinylidene fluoride (PVDF) as additives into perovskite CH3NH3PbI3 through in situ synthesis to prepare PVDF-CH3NH3PbI3@CNDs composite, which demonstrated improved water tolerance and mechanical stability. The application of PVDF-CH3NH3PbI3@CNDs for photoelectrochemical sensing was then explored. A molecularly imprinted polymer (MIP) that could specifically recognize cholesterol (CHO) was anchored to PVDF-CH3NH3PbI3@CNDs via a simple thermal polymerization process, followed by elution with hexane. A label-free and sensitive photoelectrochemical method for CHO detection was achieved by using the MIPs@PVDF-CH3NH3PbI3@CNDs platform. The detection limit for CHO was 2.1 x 10(-14) mol/L, lower than most of the existing CHO detection methods. In our perception, this platform can be extended to numerous other analytes. This research result may provide a new understanding to improve the performance and broaden the application range of organic-inorganic perovskites.
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