文献类型：期刊文献

英文题名：A novel carbon dot-based degradable pre-formed particle gel for sensitive detection of iron ions

作者：Li, Meng;Gong, Wenhui;Wang, Fang;Li, Lu;Nie, Yuhuan;Chen, Qibin[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：711

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20250717861572);WOS:【SCI-EXPANDED(收录号:WOS:001427390100001)】；

基金：This work is supported by the Fundamental Research Funds for the Central Universities (2022ZFJH004) and the 111 Project of Ministry of Education of China.

语种：英文

外文关键词：Self-degradable gel; Carbon dots; Fluorescence probe; Fe(III) ion; Sensors

摘要：Degradable fluorescent sensors that can avoid the secondary contamination are highly ideal for the detection of heavy metal ions, aligning with the sustainable development principle, thus becoming the subject of considerable interest. In this work, a carbon dot-based self-degradable pre-formed particle gel (CDs@DPPG) was successfully synthesized by one-step free radical polymerization with green fluorescence-emitted carbon dots as fluorescence probes, acrylamide (AM) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) as monomers and 1,6-hexanediol diacrylate (HDDA) as crosslinkers. Results show that CDs@DPPGs exhibit a significant quenching response, good selectivity, and fast response to Fe3+. Specifically, this gel can spontaneously degrade to a liquid with the viscosity of ca. 2.7 mPa s at a certain temperature, resulting from the presence of the thermodegradable HDDA, which is beneficial for the subsequent processing after the test. Here, the porous network structure of the CDs@DPPG provides not only a large number of active sites but also the enhanced ion transport channels, thereby reducing fluorescence response time and improving detection sensitivity. Our findings suggest that the strategy proposed in this work, i.e., combining the degradable gel with the CD-based fluorescence probe, holds a promising potential in creating the green and sustainable fluorescent sensors.