Efficient visual detection of sodium nitrite based on redox-responsive photonic crystal sensors
文献类型： 外文期刊
第一作者： Wei, Juan
作者： Wei, Juan;Xu, Yong-Quan;Wei, Juan;Yang, Ya-Fei;Zhang, Yue;Ni, Runyan;Huang, Dejian;Wang, Chuyi;Huang, Dejian;Ni, Runyan;Xu, Jingjing;Li, Lu
作者机构：
关键词： Photonic crystals; Sodium nitrite detection; Enzyme inhibition; Structural color
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）
ISSN： 1385-8947
年卷期： 2025 年 515 卷
页码：
收录情况： SCI
摘要： Accurate and timely detection of sodium nitrite is critical for ensuring food safety. Current detection methods predominantly rely on large-scale analytical instruments and lack portable systems for rapid, real-time visual analysis in field settings. This study presents a ferrocene-based polymeric photonic crystal sensor for semi-quantitative visual detection of sodium nitrite in food. The sensing mechanism involves a cascade process: sodium nitrite inhibits catalase activity, preventing decomposition of hydrogen peroxide. This alteration affects the redox process of the sensor, resulting in a change in the blue shift of reflection. Distinct structural color transitions (orange-red to green) correlate with different sodium nitrite concentrations, enabling semi-quantitative visual detection at concentrations as low as 5 x 10-5 g/L (0.72 mu M). The method is facile, insensitive to pH variations, rapid in response, and exhibits high sensitivity, stability, broad adaptability, and robust anti-interference capability. The preliminary application of the sensing system in real samples displays promising prospects. This research contributes to the advancement of practical applications in the field of food safety.
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