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荧光单宁酸纳米粒子的制备及其pH传感应用研究

Preparation of Fluorescent Tannic Acid Nanoparticles and their pH Sensing Application

李生洮, 余梦洁, 喻飘伟, 张竣翔, 吴菱苓

Environment and Resource / 2026,8(2): 181-186 / 2026-04-28 14 13

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• Information:

  重庆科技大学化学化工学院，重庆

• Keywords:
  Tannic acid; pH; Fluorescent nanoparticles; Fluorescent sensing
  单宁酸; pH; 荧光纳米颗粒; 荧光传感
• Abstract: Fluorescent polytannic acid nanoparticles (FPTA NPs) were synthesized via hydrothermal self-polymerization of tannic acid (TA) and characterized by UV-Vis, FTIR, and fluorescence spectroscopy. An FPTA NPs-based fluorescent sensor was then constructed for pH detection. The results confirmed the successful polymerization of TA into FPTA NPs containing C=O and O-H groups, with optimal excitation/emission at 470/550 nm and bright green fluorescence. The fluorescence quenching efficiency exhibited a good linear relationship in the pH range of 2.76-7.93 (R² = 0.9920). The analytical accuracy of the method was validated by pH measurement of real water samples. Thus, the proposed sensor provides a valuable scientific basis for advancing pH detection technology. 本文以单宁酸（TA）为原料，采用水热法通过自聚合制备了荧光聚单宁酸纳米颗粒（FPTANPs），并利用紫外可见光谱仪、红外光谱仪和荧光光谱仪对其进行了表征，进而构建了基于FPTANPs的荧光传感器用于pH的检测。结果表明，TA成功自聚合生成聚单宁酸纳米颗粒，其含有C=O、O-H等结构，最佳激发波长为470nm，最佳发射波长为550nm，表现出明显的绿色荧光；该FPTANPs的荧光猝灭率在pH2.76～7.93范围内具有良好的线性关系，相关系数R2=0.9920。通过对实际水样的pH测定展示了该方法良好的分析准确度。由此可见，该基于FPTANPs的荧光传感器为pH检测技术的提升与发展提供了有益的科学依据。
• DOI: 10.35534/er.0802024 (registering DOI)
• Cite: 李生洮，余梦洁，喻飘伟，等．荧光单宁酸纳米粒子的制备及其pH传感应用研究［J］．环境与资源，2026，8（2）：181-186.