Bell pepper derived nitrogen-doped carbon dots as a pH-modulated fluorescence switching sensor with high sensitivity for visual sensing of 4-nitrophenol

被引：20

作者：

Guo, Guoqiang ^{[1
]}

Li, Tingting ^{[1
]}

Liu, Ziyi ^{[1
]}

Luo, Xinyu ^{[1
]}

Zhang, Ting ^{[2
]}

Tang, Siyuan ^{[1
,3
]}

Wang, Xu ^{[1
]}

Chen, Da ^{[1
]}

机构：

[1] Ningbo Univ, Sch Phys Sci & Technol, Dept Microelect Sci & Engn, Ningbo 315211, Peoples R China

[2] Ningbo Polytech, Dept Chem Engn, Ningbo 315800, Zhejiang, Peoples R China

[3] Southern Univ Sci & Technol, Shenzhen Key Lab Full Spectral Solar Elect Generat, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

来源：

FOOD CHEMISTRY | 2024年 / 432卷

基金：

中国国家自然科学基金;

关键词：

Bell pepper; 4-Nitrophenol sensing; pH-modulated fluorescence switching; Optosensing system; Visual sensing; QUANTUM DOTS; NITROPHENOL; NANOPARTICLES;

D O I：

10.1016/j.foodchem.2023.137232

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Recently, converting bio-waste into bio-asset and implementing a portable sensing instrument for pollutant monitoring has been highly desirable and challenging. Herein, biomass-derived nitrogen-doped carbon dots (CDs) are prepared hydrothermally and emit blue fluorescence (470 nm) with a high quantum yield of 23.2%. Significantly, CDs can serve as a pH-modulated fluorescence switching nano-sensor to detect 4-NP from 0.054 to 68 & mu;M with low detection limit (LOD, 54 nM) and limit of quantification (LOQ, 181 nM) based on inner filter effect. Moreover, the satisfactory recovery of 101.8-107.5% is gained in practical sample monitoring. Furthermore, a smartphone-integrated optosensing device with CDs-based film is developed for detecting 4-NP with LOD and LOQ of 0.110 & mu;M and 0.350 & mu;M. Concomitantly, the practicability of this device is further validated in several crop samples with satisfactory recovery rates of 101.6-108.6%. Therefore, this work provides a reliable way and a prospective application for on-site 4-NP monitoring in food.

引用

页数：9

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