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MnO2 in situ formed into the pores of C-dots/ZIF-8 hybrid nanocomposites as an effective quencher for fluorescence sensing ascorbic acid

机译:C-dots / ZIF-8杂化纳米复合材料的微孔中原位形成MnO 2 作为荧光检测抗坏血酸的有效淬灭剂

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A sensitive fluorescent nanosensor based on MnO2 quenching fluorescent carbon quantum dots was facilely developed by MnO2 in situ formed in the pores of C-dots/ZIF-8 hybrid nanocomposite. The C-dots/ZIF-8 hybrid nanocomposite was synthesized via a rapid method within 5 min at room temperature. Then, the MnO2 was directly incorporated into the ZIF-8 framework via redox reaction between the C-dots/ZIF-8 hybrid nanocomposite and KMnO4. The resulting fluorescent nanosensor exhibited a relatively uniform particle size of about 100 nm, good water-dispersibility and a highly selective fluorescence response toward ascorbic acid with a detection limit as low as 83 nM and a linear range of 0.5–8 μM.
机译:MnO 2 轻松开发了一种基于MnO 2 猝灭荧光碳量子点的敏感荧光纳米传感器。原位形成在C点/ ZIF-8杂化纳米复合材料的孔中。在室温下5分钟内通过快速方法 合成了C-dots / ZIF-8杂化纳米复合材料。然后,通过C点/ ZIF-8杂化纳米复合材料与碳纳米管之间的氧化还原反应,将MnO 2 直接掺入ZIF-8框架。 KMnO 4 。所得的荧光纳米传感器显示出约100 nm的相对均匀的粒径,良好的水分散性和对抗坏血酸的高度选择性的荧光响应,检测限低至83 nM,线性范围为0.5–8μM。

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