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 

机构地区：[1]School of Pharmacy, North China University of Science and Technology, Tangshan, 063210, China [2]Tianjin TianShi College, Tianjin, 301700, China [3]College of Chemistry, Beijing Normal University, Beijing, 100875, China

出　　处：《Nano Research》2024年第11期9965-9970,共6页纳米研究（英文版）

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).

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.

关 键 词：porphyrin functionalization SELECTIVITY Hg^(2+)removal ELECTROSPINNING adsorption 

分 类 号：O62[理学—有机化学]