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

Guo，Guoqiang1; Li，Tingting1; Liu，Ziyi1; Luo，Xinyu1; Zhang，Ting2; Tang，Siyuan1,3; Wang，Xu1; Chen，Da1

2024-01-30

10.1016/j.foodchem.2023.137232

Food Chemistry   Impact Factor & Quartile

0308-8146

1873-7072

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 μM 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 μM and 0.350 μM. 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.

4-Nitrophenol sensing Bell pepper Optosensing system pH-modulated fluorescence switching Visual sensing

SCI

English

Others

Booz Allen Foundation[61604084];

Chemistry ; Food Science & Technology ; Nutrition & Dietetics

Chemistry, Applied ; Food Science & Technology ; Nutrition & Dietetics

WOS:001067810400001

ELSEVIER SCI LTD

AGRICULTURAL SCIENCES

2-s2.0-85168796091

Scopus

1.Department of Microelectronic Science and Engineering,School of Physical Science and Technology,Ningbo University,Ningbo,315211,China
2.Department of Chemical Engineering,Ningbo Polytechnic,Ningbo,Zhejiang,315800,China
3.Department of Materials Science and Engineering,Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG),Southern University of Science and Technology,Shenzhen,518055,China

Guo，Guoqiang,Li，Tingting,Liu，Ziyi,et al. Bell pepper derived nitrogen-doped carbon dots as a pH-modulated fluorescence switching sensor with high sensitivity for visual sensing of 4-nitrophenol[J]. Food Chemistry,2024,432.

Guo，Guoqiang.,Li，Tingting.,Liu，Ziyi.,Luo，Xinyu.,Zhang，Ting.,...&Chen，Da.(2024).Bell pepper derived nitrogen-doped carbon dots as a pH-modulated fluorescence switching sensor with high sensitivity for visual sensing of 4-nitrophenol.Food Chemistry,432.

Guo，Guoqiang,et al."Bell pepper derived nitrogen-doped carbon dots as a pH-modulated fluorescence switching sensor with high sensitivity for visual sensing of 4-nitrophenol".Food Chemistry 432(2024).