A facile fluorescent sensor based on nitrogen-doped carbon dots derived from Listeria monocytogenes for highly selective and visual detection of iodide and pH

Mingsha Jie; Ruipeng Guo; Yanan Zhang; Jianing Huang; Gaigai Xu; Min Li; Xiaoyue Yue; Baocheng Ji; Yanhong Bai

doi:10.1039/d2ra00826b

A facile fluorescent sensor based on nitrogen-doped carbon dots derived from Listeria monocytogenes for highly selective and visual detection of iodide and pH

RSC Adv. 2022 Mar 4;12(12):7295-7305. doi: 10.1039/d2ra00826b. eCollection 2022 Mar 1.

Authors

Mingsha Jie^{1

2}, Ruipeng Guo³, Yanan Zhang¹, Jianing Huang¹, Gaigai Xu¹, Min Li^{1

2}, Xiaoyue Yue^{1

2}, Baocheng Ji^{1

2}, Yanhong Bai^{1

2}

Affiliations

¹ College of Food and Bioengineering, Zhengzhou University of Light Industry Zhengzhou Henan Province 450001 P. R. China baiyanhong212@163.com +86-28-82890825 +86-28-82890810.
² Henan Key Laboratory of Cold Chain Food Quality and Safety Control Zhengzhou Henan Province 450001 P. R. China.
³ School of Mechanical and Electrical Engineering, Henan Vocational College of Applied Technology Zhengzhou Henan Province 450042 P. R. China.

Abstract

Sensitive and visual analysis of iodide (I^-) and pH is significant in environmental and food applications. Herein, we present a facile fluorescent sensor for highly selective and visual detection of I^- and pH based on nitrogen-doped carbon dots derived from Listeria monocytogenes (NCDs-LM). The NCDs-LM-based fluorescent sensor showed a good linear relationship to I^- concentrations, and the detection limit was calculated as 20 nmol L^-1. The developed sensor was successfully applied to the detection of I^- in drinking water and milk samples. Meanwhile, the as-synthesized NCDs-LM sensor can be used to detect pH, achieving a wide linear pH range. Furthermore, fluorescent test papers based on NCDs-LM were designed for semi-quantitative detection of I^- and pH via the naked-eye colorimetric assay. The present work indicates that the NCDs-LM-based fluorescent sensor has high potential for use in environmental monitoring and food analysis.