Fluorescence sensing material for Cu2+ and Fe3+ detection and preparation method and application thereof

Abstract

The invention relates to a fluorescence sensing material for Cu2+ and Fe3+ detection and a preparation method and application thereof. The preparation method includes dissolving polyphenylene vinylene precursor and polymethyl methacrylate into N, N-dimethyl-formamide solvent, obtaining polyphenylene vinylene precursor / polymethyl methacrylate nanofiber membrane after electrostatic spinning, and subjecting the obtained nanofiber membrane to a heat eliminating treatment under a vacuum state at the temperature of 110 to 130 DEG C to obtain the fluorescent sensing material. The fluorescent sensing material has a high specific surface area, so that the contact surface of the fluorescent sensing material and detection molecule can be effectively enlarged to obtain greatly improved detection sensitivity. The fluorescent sensing material has no specific receptor and has a special porous nanofiber structure formed by high temperature elimination to realize identification of the substance to be detected. When subjected to optical excitation, the fluorescent sensing material shows high selectivity and sensitivity to Cu2+ and Fe3+ and has different responsiveness. The fluorescent sensing material can be reused and has a good application prospect.

Description

technical field [0001] The invention relates to a fluorescent chemical sensing material, in particular to a 2+ and Fe 3+ The invention relates to a porous nanofiber material with high selectivity and high sensitivity and rapid response, a preparation method and an application thereof, and belongs to the technical fields of polymer materials, fluorescent chemical sensing materials and chemical analysis and detection. Background technique [0002] With the increasing attention to environmental pollution and the improvement of monitoring requirements, there are more and more functional requirements for detection materials, such as fast, simple, high sensitivity, and low cost. Among the many analysis and detection methods, the fluorescence detection method has the characteristics of less dosage, fast response, simple operation, high selectivity and high sensitivity, and is widely used in different fields such as ion trace and micro analysis, biomolecular recognition, etc. In...

AI Technical Summary

Problems solved by technology

[0004] The application of fluorescent chemical sensing materials in ion detection has been widely reported. For example, the literature Nano Lett., 2008, 8, 104-109 and J.Am.Chem.Soc., 2009, 131, 2008-2012 introduced the use of amino and coumarin Cu 2+ liquid sensing system, but due to the disadvantages of inconvenient portability and waste of resources, it cannot be widely used

In recent years, solid-state fluorescent chemical sensing materials have also achieved rapid development. For example, the literature Adv.Funct.Mater., 2011, 21, 845-850 introduced a method for detecting Cu 2+ Amino-modified film, although the film can be reused, it can only detect a single Cu 2+ , and the detection efficiency is low; the literature Environ.Sci.Technol., 2012,46,367-373 introduces a simultaneous detection of Cu 2+ and Cr 3+ sensing materials, but in this report two kinds of ions must act synergistically to realize the repeated use of the membrane

Images