Chitosan coated fluorescent mesoporous silica for the sensitive and selective detection of H2O2

[Display omitted] •A novel turn-on fluorescent sensor MSN/TPE-CS@Ag for H2O2 was prepared.•The probe showed good selectivity for H2O2 even with various interfering substances.•The detection limit for H2O2 was as low as 0.64 μM in the rage from 1 to 300 μM.•It was applied to detecting H2O2 in spiked...

Full description

Saved in:
Bibliographic Details
Published inSpectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 282; p. 121661
Main Authors Hou, Xinhui, Song, Yifan, Zhou, Hengquan, Guo, Lei, Li, Guiying, Tao, Qian
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.12.2022
Subjects
Aggregation-induced emission
Detection
Fluorescent sensor
H2O2
Mesoporous silica
Fluorescent sensor
Aggregation-induced emission
H2O2
Detection
Mesoporous silica
Online AccessGet full text

Cover

More Information
Summary:[Display omitted] •A novel turn-on fluorescent sensor MSN/TPE-CS@Ag for H2O2 was prepared.•The probe showed good selectivity for H2O2 even with various interfering substances.•The detection limit for H2O2 was as low as 0.64 μM in the rage from 1 to 300 μM.•It was applied to detecting H2O2 in spiked samples and showed a good recoveries. A novel turn-on fluorescent sensor for hydrogen peroxide (H2O2) was prepared from chitosan (CS) coating mesoporous silica nanoparticles (MSNs) loaded with 1-(4-Aminophenyl)-1,2,2-triphenylethene (TPE-NH2) and silver nanoparticles (AgNCs). The surface of MSNs was coated by CS as the gatekeeper and the template for loading of AgNCs. Because of the surface plasmon-enhanced energy transfer (SPEET), AgNCs effectively quenched the fluorescence emission of nanoparticles. In the presence of H2O2, AgNCs can be oxidized to Ag+, resulting in the recovery of fluorescence. This fluorescent sensor was characterized with respect to its chemical composition, morphological features and optical properties by means of FTIR, XRD, TGA, SEM, TEM, XPS, UV–Vis and fluorescence spectroscopy. The MSN/TPE-CS@Ag nanoparticles showed good sensitivity and selectivity for H2O2 even with various interfering ions and agents. Under optimized conditions, the detection limit for H2O2 was 0.64 μM in the rage of 1–300 μM. The feasibility of the practical application of this probe was confirmed by accurate quantitative of H2O2 in practical samples.
ISSN:1386-1425
DOI:10.1016/j.saa.2022.121661