Structural design of a high sensitivity biomass cellulose-based colorimetric sensor and its in situ visual recognition mechanism for Cu 2

A novel biomass cellulose-based colorimetric sensor (DAC-PDH) was prepared by a Schiff base reaction between the aldehyde groups of dialdehyde cellulose (DAC) and the amino groups of 2,6-pyridine dihydrazide (PDH). The as-prepared sensor (DAC-PDH) showed selective recognition of Cu and a visual colo...

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Bibliographic Details
Published inCarbohydrate polymers Vol. 219; p. 95
Main Authors Zhou, Shile, He, Hui, Guo, Wei, Zhu, Hongxiang, Xue, Fei, Cheng, Meixiao, Lin, Jiehan, Wang, Lei, Wang, Shuangfei
Format Journal Article
LanguageEnglish
Published England 01.09.2019
Subjects
Colorimetric sensor
Cellulose
Grafting
Recognition mechanism
In situ identification
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Summary:A novel biomass cellulose-based colorimetric sensor (DAC-PDH) was prepared by a Schiff base reaction between the aldehyde groups of dialdehyde cellulose (DAC) and the amino groups of 2,6-pyridine dihydrazide (PDH). The as-prepared sensor (DAC-PDH) showed selective recognition of Cu and a visual colour change from white to green. The visual limit of detection for Cu was 10  mol/L. Furthermore, DAC-PDH responded to Cu within 30 s by the method of dynamic condition. The sensor possessed the properties of a high density of functional groups (CO, NH, NH ), a large external surface area, a short transit distance and flexibility; thus, Cu can be rapidly absorbed and enriched on the DAC-PDH through multi-dentate ligand chelation between Cu and the carbonyl groups (CO) and the amino groups (NH, NH ) of DAC-PDH. The as-prepared DAC-PDH colorimetric sensor exhibits promising prospects for in situ identification of Cu .
ISSN:1879-1344