PCN-222@g-C3N4 cathodic materials for "signal-off" photoelectrochemical sensing of kanamycin sulfate

Wenxia Dong; Zhongping Li; Wen Wen; Sisi Feng; Yuanjian Zhang; Guangming Wen

doi:10.1039/d1ra04275k

PCN-222@g-C₃N₄ cathodic materials for "signal-off" photoelectrochemical sensing of kanamycin sulfate

RSC Adv. 2021 Aug 20;11(45):28320-28325. doi: 10.1039/d1ra04275k. eCollection 2021 Aug 16.

Authors

Wenxia Dong¹, Zhongping Li¹, Wen Wen¹, Sisi Feng², Yuanjian Zhang³, Guangming Wen^{1

4}

Affiliations

¹ School of Chemistry and Chemical Engineering, Institute of Environmental Science, Shanxi University Taiyuan 030006 China zl104@sxu.edu.cn.
² Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University Taiyuan Shanxi 030006 China.
³ School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China.
⁴ School of Chemistry and Chemical Engineering, Jinzhong University Jinzhong 030619 China.

Abstract

A novel cathodic photoelectrochemical (PEC) sensor was developed for the ultrasensitive detection of kanamycin sulfate (KAM) based on the g-C₃N₄ coupled zirconium-based porphyrinic metal-organic framework (PCN-222). Photocathodes made by double n-type semiconductors, which was attributed to the transfer of electrons and holes from g-C₃N₄ broad band to PCN-222 with narrow band gap. The photocurrent decreased when KAM was added, which was conducive to the construction of the PEC sensor. Then, the PCN-222@g-C₃N₄ was used as a photosensitive platform to construct a label-free strategy and ultrasensitive detection of KAM with wide linear range from 1 to 1000 nM and a low detection limit of 0.127 nM. Moreover, this sensing platform shows good selectivity, favourable reproducibility and brilliant stability. The reported sensors provided great potential for the detection of KAM in actual samples.