Cellulose-based colorimetric sensor with N, S sites for Ag+ detection

被引：31

作者：

Wang, Lei ^{[1
,2
]}

Zhang, Cunzhi ^{[1
,2
]}

He, Hui ^{[1
,2
]}

Zhu, Hongxiang ^{[1
,2
]}

Guo, Wei ^{[1
,2
]}

Zhou, Shile ^{[1
,2
]}

Wang, Shuangfei ^{[1
,2
]}

Zhao, Joe R. ^{[3
]}

Zhang, Jian ^{[1
,2
]}

机构：

[1] Guangxi Univ, Coll Light Ind & Food Engn, Nanning 530004, Peoples R China

[2] Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China

[3] Tri Y Environm Res Inst, 2655 Lillooet St, Vancouver, BC V5M 4P7, Canada

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2020年 / 163卷

基金：

中国国家自然科学基金;

关键词：

Cellulose matrix; Colorimetric sensor; in-site identification; Synergistic mechanism; Ag+; SILVER(I) COMPLEXES; IONS; CHITOSAN; THIOUREA; CU2+; NANOCRYSTALS; ADSORPTION; MERCURY; CU(II); C-13;

D O I：

10.1016/j.ijbiomac.2020.07.018

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A novel cellulose-based colorimetric sensor (DAC-Tu) with N, S sites for Ag+ was prepared. The DAC-Tu exhibited excellent selectivity and sensitivity for Ag+ with a naked eyes color change from white to black in mixed metal ions aqueous solutions. The naked-eye in-situ detection limit of DAC-Tu for Ag+ was 10(-6) mol/L within 10 min. The cellulose matrix and the grafted functional groups (-Cd=S, -NH2) of DAC-Tu all contributed to the low naked-eye in-situ detection limit. The mechanism of the visual recognition of DAC-Tu sensor for Ag+ was proposed, the N and S atoms of DAC-Tu preferentially coordination chelated with Ag+ to form N-Ag, S-Ag, and Ag2S, and enriched on the cellulose matrix, thus the DAC-Tu presented different color change in response to different concentrations of Ag+. The as-prepared DAC-Tu colorimetric sensor showed a great application prospect for in-situ naked eyes detection of Ag+. (C) 2020 Published by Elsevier B.V.

引用

页码：593 / 602

页数：10

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