文献类型：期刊文献

英文题名：Magnetically-oriented porous hydrogel advances wearable electrochemical solidoid sensing heavy metallic ions

作者：Tang, Wanxin[1];Gu, Zhen[2];Chu, Yao[1];Lv, Jian[3];Fan, Li[1];Liu, Xinling[1];Wang, Feng[1];Ying, Ye[1];Zhang, Jian[1];Jiang, Yuning[1];Cao, Jiaying[1];Zhu, Anni[1];Yang, Haifeng[1]

机构：[1]Shanghai Normal Univ, Coll Chem & Mat Sci, Shanghai 200234, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, Shanghai 200237, Peoples R China;[3]Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore, Singapore

年份：2023

卷号：453

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20224413026078);WOS:【SCI-EXPANDED(收录号:WOS:000891641600003)】；

基金：We greatly appreciate the support of the National Natural Science Foundation of China (No. 21475088), International Joint Laboratory on Resource Chemistry (IJLRC), Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Engineering Research Center of Green Energy Chemical Engineering (18DZ2254200), Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors and Shanghai Frontiers Science Center of Biomimetic Catalysis. Shanghai postdoctoral incentive Program (2020354), Shanghai Human Resources and Social Security Bureau.

语种：英文

外文关键词：Magnetically-oriented hydrogel; Magnetic control; Porous; Wearable solidoid sensing; Heavy metal contamination

摘要：Developing wearable sensors to determine chemical contamination in solidoid is currently a great challenge. Hydrogels with polymeric networks have been employed as electrochemical cells and media to realize wearable solidoid sensing. However, it is still a hard task to enable hydrogel to simultaneously possess effective mass transfer, mechanical robustness as well as easy and tight adhesion to sensing electrodes. Routinely, a hydrogel with improved adhesion to the electrode surface by introducing additives may deteriorate the mass transfer capability. Increasing the porosity of hydrogel could enhance mass diffusion but sacrifices mechanical robustness. Herein, a composite hydrogel is achieved by embedding magnetic oriented MWCNT-Fe3O4 strips in porous agarose (MMFPA), which exhibits enhanced permeability and speeding diffusion of electrolyte ions. Moreover, the orientation in order and strip-like MWCNT-Fe3O4 three-dimensional composites improve the compressive strength of hydrogel, which could recover back within 2 min in water after removal of pressure. Such magnetic hydrogel is beneficial to be assembled to the wearable glove sensor by using magnets to achieve a stable and compact sensing platform. As the application example, the resultant wearable sensing protocol is successfully utilized to monitor Cd2+ trace residues in rice, tea, and soil with an affordable response as low as 0.112 mg/kg and rapid signal acquisition (<5 min). It paves an attractive, accessible, and effective way to on-site evaluate solidoid Cd2+ level for forewarning food safety and environmental risk.