Optical microfiber sensor for detection of Ni2+ ions based on ion imprinting technology

Yi, Zhen, Liu, Juan, Liu, Bin, Guo, Huiqin, Wu, Qiang, Shi, Jiulin and He, Xingdao (2022) Optical microfiber sensor for detection of Ni2+ ions based on ion imprinting technology. Analyst, 147 (2). pp. 358-365. ISSN 0003-2654

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Official URL: https://doi.org/10.1039/d1an01982a

Abstract

The detection of ultralow heavy metal ion concentration is highly significant for protecting human health and maintaining the stability of the ecological environment. Herein, a microfiber interferometer chemical sensor for the detection of Ni2+ ions was proposed and experimentally demonstrated. The microfiber sensor was coated with an ion-imprinted chitosan polymer using Ni2+ as the template ion. Experimental results demonstrated a high sensitivity of 0.0454 nm nM−M for detect-ing Ni2+ in the range of 10 nM to 100 nM, and a limit of detection as low as 6.5 nM was achieved. The microfiber sensor was verified using two different non-template heavy ions, Cu2+ and Cr3+, and was determined to be highly selective to Ni2+. Furthermore, the regeneration characteristics of the sensor were experimentally assessed by three repeated adsorption–desorption cycles, and the results showed that the microfiber sensor achieved good stability without a significant loss in sensitivity. Besides, the detecting tests of Ni2+ in lake water and industrial sewage samples demonstrated the sensor's practical application. This proposed sensor has the advantages of simple configuration, high selectivity and sensitivity, fast response, and the ability to serve as a platform for water safety monitoring and remote sensing.

Item Type: Article
Additional Information: Funding information: This work was jointly supported by National Natural Science Foundation of China (NSFC) (62163029, 61865013, 62065013); Natural Key Research and Development Project from the Ministry of Science and Technology (grant no. 2018YFE0115700); Science and Technology Project of Jiang-xi Education Department (grant no. GJJ180518); Nanchang Hangkong University Graduate Student Innovation special fund project (grant no. YC2020-S523).
Subjects: F200 Materials Science
F300 Physics
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 13 Apr 2022 11:56
Last Modified: 13 Apr 2022 12:00
URI: http://nrl.northumbria.ac.uk/id/eprint/48884

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