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Colorimetric Sensing of Hydrogen Peroxide Based on the Wavelength-Shift of CsPbBr_(3) Perovskite Nanocrystals on Water-Oil Interface
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作者 heng-gan li Yi-Men Zhu +3 位作者 Xue-lian liu Zhi-Yong Guo Ya-Ning Huang Xi Chen 《Journal of Analysis and Testing》 EI CSCD 2023年第1期1-7,共7页
In this study,the halogen exchange reactions are investigated between KI or methylamine iodide in aqueous solution and CsPbBr_(3)NCs in toluene.The mass transfer process on the interface between water and toluene affe... In this study,the halogen exchange reactions are investigated between KI or methylamine iodide in aqueous solution and CsPbBr_(3)NCs in toluene.The mass transfer process on the interface between water and toluene affects the halogen exchange time and e fficiency.Stirring and heating can effectively improve the halogen exchange e fficiency and increases the sensing sensitivity.The photoluminescence wavelength shift of CsPbBr_(3)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 H_(2)O_(2)as a typical water-soluble oxide,the method is applied to the colorimetric sensing of H_(2)O_(2)in water solution.After the optimization of sensing conditions,the obvious wavelength shift could be observed with the different concentration range of H_(2)O_(2).A good linear relationship between the wavelength shift and the H_(2)O_(2)concentration from 0 to 1.0 mmol/L with the detection limit of 0.05 mmol/L H_(2)O_(2)could be found. 展开更多
关键词 Halogen exchange Interface reaction CsPbBr_(3)perovskite nanocrystals Photoluminescence wavelength shift Colorimetric sensing
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