Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, PR China.
Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, PR China; Dehong Autonomous Prefecture Institute of Sugar Industry, Yunnan 678400, PR China.
Carbohydr Polym. 2022 Sep 1;291:119587. doi: 10.1016/j.carbpol.2022.119587. Epub 2022 May 7.
Tetracycline (TC) residues have been noted as an important class of emerging contaminants in the environment, thus fast, straightforward, highly sensitive detection method is becoming an issue that must be addressed. Herein, a novel CDs@ZIF-8 sensing material was fabricated by encapsulating luminescent carbon dots (CDs) into the metal-organic framework (ZIF-8) to achieve highly luminescent porous composites. Furthermore, to avoid the secondary contamination caused by powders, a shapable CDs@ZIF-8/CS film sensor as a portable disposable test strip with dual-function of TC detection and adsorption was designed by crosslinking CDs@ZIF-8 with chitosan (CS). The as-prepared CDs@ZIF-8/CS hybrid film exhibited the high sensitivity and selectivity for TC fluorescence detection and rapid decontaminate capability, as well as high optical transmittance and robust mechanical property, which were essential for the practical sensing application. This paper-based dual-functional luminescent sensor exhibits promising practicability for TC detection and contaminant removal in pharmaceutical analysis, food safety and water treatment.
四环素（TC）残留已被认为是环境中一类重要的新兴污染物，因此，快速、直接、高灵敏度的检测方法成为亟待解决的问题。在此，通过将发光碳点（CDs）封装到金属-有机骨架（ZIF-8）中，制备了一种新型 CDs@ZIF-8 传感材料，以实现高发光多孔复合材料。此外，为了避免粉末引起的二次污染，通过交联 CDs@ZIF-8 与壳聚糖（CS），设计了一种具有 TC 检测和吸附双重功能的可成型 CDs@ZIF-8/CS 薄膜传感器作为便携式一次性测试条。所制备的 CDs@ZIF-8/CS 杂化薄膜对 TC 荧光检测具有高灵敏度和选择性，以及快速的去污能力，同时具有高光透过率和强机械性能，这对于实际传感应用至关重要。这种基于纸张的双功能发光传感器在药物分析、食品安全和水处理中用于 TC 检测和污染物去除方面具有很大的实用潜力。
