pH and solvent induced discoloration behavior of multicolor fluorescent carbon dots
pH and solvent induced discoloration behavior of multicolor fluorescent carbon dots
复制标题
DOI：
10.1016/j.colsurfa.2022.129261
复制
发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
Jiyao Xu;Lili Sun;Xiangjun Guo;Hongmei Zhang;Xihui Zhao
中科院分区：
文献类型：
--
作者：
Jiyao Xu;Lili Sun;Xiangjun Guo;Hongmei Zhang;Xihui Zhao
以苯二胺的三种异构体（o/m/p）为氮源和碳源，乙醇为溶剂，采用一步水热法制备了绿色、蓝色和粉红色荧光碳点（o/m/p-CD）。所得碳量子点具有不同的发光行为，且发光行为受溶剂和pH值的影响。更有趣的是，m-CD在不同pH条件下表现出明显的变色行为，并分别在酸性和碱性条件下具有良好的线性关系。此外，我们将m-CD分别与试纸、PVA膜和棉织物结合，制备用于视觉pH检测的复合材料。所制备的复合材料在较好的pH范围（0.5单位）内对少量试样（<5 μL）具有良好的目视检测效果，可应用于痕量pH检测。
Green, blue and pink fluorescent carbon dots (o/m/p-CDs) were prepared by one-step hydrothermal method with three isomers (o/m/p) of phenylenediamine as nitrogen and carbon sources and ethanol as solvent. The obtained carbon dots exhibited different luminescence behaviors, and the luminescence behaviors were affected by solvent and pH. More interestingly, m-CDs exhibited obvious discoloration behavior under different pH conditions and had excellent linear relationship under acidic and basic conditions, respectively. Furthermore, we combined m-CDs with test paper, PVA film, and cotton fabric, respectively, to prepare composites for visual pH detection. The as-prepared composite material has excellent visual detection effect for a small amount of test sample (<5 μL) in the fine pH range (0.5 unit), and could be applied to trace pH detection.