Abstract
In this study, the halogen exchange reactions are investigated between KI or methylamine iodide in aqueous solution and CsPbBr3 NCs in toluene. The mass transfer process on the interface between water and toluene affects the halogen exchange time and efficiency. Stirring and heating can effectively improve the halogen exchange efficiency and increases the sensing sensitivity. The photoluminescence wavelength shift of CsPbBr3 NCs shows good linear relationship with the concentration of I− in the range from 0 to 20 nmol/L with the detection limit of 0.2 nmol/L I−. Taking H2O2 as a typical water-soluble oxide, the method is applied to the colorimetric sensing of H2O2 in water solution. After the optimization of sensing conditions, the obvious wavelength shift could be observed with the different concentration range of H2O2. A good linear relationship between the wavelength shift and the H2O2 concentration from 0 to 1.0 mmol/L with the detection limit of 0.05 mmol/L H2O2 could be found.
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Funding
This research was funded by National Natural Science Foundations of China (21876141) and the Shenzhen Science and Technology Project (JCYJ20180306172823786).
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Experiments, investigation, and original draft preparation, H-GL, Y-MZ; methodology, X-LL, Z-YG; review and editing, Y-NH; funding acquisition supervision, and writing, XC. All authors have read and agreed to the published version of the manuscript.
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Li, H., Zhu, Y., Liu, X. et al. Colorimetric Sensing of Hydrogen Peroxide Based on the Wavelength-Shift of CsPbBr3 Perovskite Nanocrystals on Water–Oil Interface. J. Anal. Test. 7, 1–7 (2023). https://doi.org/10.1007/s41664-022-00231-1
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DOI: https://doi.org/10.1007/s41664-022-00231-1