Show simple item record

dc.contributor.authorGeng, Zhigang
dc.contributor.authorZhang, Haimin
dc.contributor.authorXiong, Qizhong
dc.contributor.authorZhang, Yunxia
dc.contributor.authorZhao, Huijun
dc.contributor.authorWang, Guozhong
dc.date.accessioned2017-10-26T22:51:20Z
dc.date.available2017-10-26T22:51:20Z
dc.date.issued2015
dc.identifier.issn2050-7488
dc.identifier.doi10.1039/c5ta05610a
dc.identifier.urihttp://hdl.handle.net/10072/101457
dc.description.abstractIn this work, a three-dimensional (3D) chitosan hydrogel with superior fluorescence properties was successfully fabricated by modifying chitosan fibers with glutaric dialdehyde (GD) via a simple cross-linking approach. The resulting three-dimensional fluorescent chitosan hydrogel (3D-FCH) with hydrophilic properties exhibited a strong blue fluorescence emission at an excitation wavelength of 337 nm. The fluorescence mechanism of the as-synthesized 3D-FCH was investigated and proposed in detail using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR) techniques. As a solid-phase fluorescent probe, the 3D-FCH was used to selectively and sensitively determine mercury(II) (Hg2+) ions in aqueous media. The results demonstrated that a prominent fluorescence quenching at 401 nm was observed in the presence of Hg2+ with a linear response range of 5.0–50 nM and an estimated limit of detection of 0.9 nM. The fluorescence quenching mechanism could be ascribed to the strong complexation between Hg2+ and the GD fluorophore with a conjugate structure. Moreover, the porous structure of the chitosan hydrogel and the high adsorption capacity of the chitosan fibers in the hydrogel could be very favorable for the rapid fluorescence determination of Hg2+. This work may pave a new way to develop low-cost fluorescent chitosan hydrogels as solid-phase fluorescence determination platforms to replace traditional liquid-phase fluorophores for application in the fluorescence detection of heavy metal ions.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.relation.ispartofpagefrom19455
dc.relation.ispartofpageto19460
dc.relation.ispartofissue38
dc.relation.ispartofjournalJournal of Materials Chemistry A
dc.relation.ispartofvolume3
dc.subject.fieldofresearchMacromolecular and Materials Chemistry not elsewhere classified
dc.subject.fieldofresearchMacromolecular and Materials Chemistry
dc.subject.fieldofresearchMaterials Engineering
dc.subject.fieldofresearchInterdisciplinary Engineering
dc.subject.fieldofresearchcode030399
dc.subject.fieldofresearchcode0303
dc.subject.fieldofresearchcode0912
dc.subject.fieldofresearchcode0915
dc.titleA fluorescent chitosan hydrogel detection platform for the sensitive and selective determination of trace mercury(II) in water
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2015 Royal Society of Chemistry. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorZhao, Huijun
gro.griffith.authorZhang, Haimin


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record