An ammonia-sensitive fluorescence sensor based on polyvinyl alcohol-graphene quantum dots/halloysite nanotubes hybrid film for monitoring fish freshness

文献类型： 外文期刊

第一作者： Zhang, Jiaran

作者： Zhang, Jiaran;Yu, Jie;Yin, Hao;Yue, Yuntao;Jia, Zhixin;Shi, Ce;Jia, Zhixin;Shi, Ce;Jia, Zhixin;Shi, Ce

作者机构：

关键词： Graphene quantum dots; Halloysite nanotubes; ammonia; Freshness; Fluorescence film

期刊名称：FOOD CHEMISTRY （ 影响因子：8.5； 五年影响因子：8.2 ）

ISSN： 0308-8146

年卷期： 2024 年 454 卷

页码：

收录情况： SCI

摘要： A fluorescent hybrid film composed of nitrogen -doped graphene quantum dots (N-GQDs) loaded on halloysite nanotubes (HNTs) (N-GQDs/HNTs nanocomposite) as a sensitive element and polyvinyl alcohol (PVA) as a filmforming matrix was designed for freshness detection. The PVA-N-GQDs/HNTs hybrid film exhibited significantly enhanced fluorescence attributed to the loading of N-GQDs onto the surface of HNTs through electrostatic interactions and hydrogen bonding, effectively reducing their aggregation. The fluorescence of the hybrid film could be quenched by ammonia via photoinduced electron transfer (PET), with good linearity in the range of 20 ppm to 500 ppm ammonia and a limit of detection (LOD) of 0.63 ppm. In addition, the hybrid film was applied to monitor the freshness of seawater fish and freshwater fish stored at refrigeration and room temperature to evaluate the practicality of this approach. The developed hybrid film showed promise for nondestructive and onsite monitoring of fish spoilage.

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