Sensitive and environmental friendly sensor on porphyrin functionalized chitosan fiber membrane for Hg^(2+)

作     者：Yafei Ma Xinman Liu Zhiping Fu Lifen Zhang Yuexin Guo Hui Wang Zhiqian Jia 

作者机构：School of Pharmacy North China University of Science and Technology Tangshan 063210 China Tianjin TianShi College Tianjin 301700 China College of Chemistry Beijing Normal University Beijing 100875 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第11期

页      面：9965-9970页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by Natural Science Foundation-Steel and Iron Foundation of Hebei Province of China(No.B2020209022) PhD Startup Program of North China University of Science and Technology(No.BS2017031) Tianjin Science and Technology plan project(No.24ZYCGSN01250) 

主　　题：porphyrin functionalization selectivity Hg^(2+)removal electrospinning adsorption 

摘      要：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 Hg^(2+) contaminant selectively. Compared with other common metal ions (Pb^(2+), Cu^(2+), Fe^(3+), Cr^(3+), Mg^(2+), and Zn^(2+)), the colorimetric sensor has specific color development and sensitivity to Hg^(2+) 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. Hg^(2+) 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 Hg^(2+) 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.