Affiliation:
1. Department of Applied Chemistry School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 P. R. China
2. Institute of Advanced Technology Heilongjiang Academy of Sciences Harbin Heilongjiang 150020 P. R. China
3. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education Shaanxi University of Science and Technology Xi'an 710021 P. R. China
4. Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology Shaanxi University of Science and Technology Xi'an 710021 P. R. China
Abstract
AbstractThis study introduces a novel fluorescent light‐up electrospun membrane, integrating PbBr2, which serves as an exceptionally selective probe for the detection of cesium ions (Cs+). Leveraging the superior optical properties of CsPbBr3 perovskite nanocrystals (PNCs), the researchers employ electrospinning technology to fabricate a test strip, namely PbBr2@polyacrylonitrile (PbBr2@PAN) nanofiber membranes, capable of swiftly detecting Cs+ in water merely by observing changes in the nanocrystals' luminescence with the naked eye. By the introduction of NH4+‐modified montmorillonite (NH4+‐MMT), PbBr2‐MT@PAN nanofiber membranes is obtained. The selectivity and sensitivity to Cs+ can be further improved because NH4+‐MMT endows PbBr2‐MT@PAN nanofiber membranes with the hydrophilic property and selective adsorption toward Cs+ ions. The membrane's fabrication is simple, scalable, and cost‐effective, with high cesium selectivity and sensitivity down to 44 ppb. This innovation enables efficient, on‐site cesium monitoring critical for environmental safety and nuclear waste management.
Funder
Natural Science Foundation of Heilongjiang Province
Heilongjiang Provincial Postdoctoral Science Foundation
Shaanxi University of Science and Technology