@article{Ma2024, 
author = {Yafei Ma and Xinman Liu and Zhiping Fu and Lifen Zhang and Yuexin Guo and Hui Wang and Zhiqian Jia},
title = {Sensitive and environmental friendly sensor on porphyrin functionalized chitosan fiber membrane for Hg2+},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {11},
pages = {9965-9970},
keywords = {porphyrin functionalization, selectivity, Hg2+ removal, electrospinning, adsorption},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6890-0},
doi = {10.1007/s12274-024-6890-0},
abstract = {Mercury is the most toxic and harmful heavy metal pollutant, and it is essential to detect and remove mercury from beverages. Inducing the porphyrin molecules into the chitosan structure, a novel membrane sensor tetrakis(4-carboxyphenyl)porphyrin-grafted chitosan fiber membrane (TCPP-CS) was prepared by electrospinning method and applied to recognize Hg2+ contaminant selectively. Compared with other common metal ions (Pb2+, Cu2+, Fe3+, Cr3+, Mg2+, and Zn2+), the colorimetric sensor has specific color development and sensitivity to Hg2+ and the detection limit of the sensor reaches 1 × 10–5 mol·L–1. The response time of the membrane is 5 s, and it can be specifically colored in various pH environments convenient for practical application. Hg2+ resulted in a visual color change of the fiber membrane from brown to yellow-green, indicating a potential interaction between the porphyrin-functionalized chitosan fiber membrane and Hg2+ ions, and the wavelength shift of the UV–visible spectrum can be observed. It has the advantages of simplicity, rapidity, high selectivity, and high sensitivity, providing a new method for removing and detecting heavy metals in traditional Chinese medicine and drinks.}
}