Issue 4, 2012
From the journal:

RSC Advances

Sensitive metal ion sensors based on fibrous polystyrene membranes modified by polyethyleneimine

Min Sun,abc   Bin Ding*ab  and  Jianyong Yu*b  

* Corresponding authors

a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
E-mail: binding@dhu.edu.cn
Fax: +86-21-62378202
Tel: +86-21-62378202

b Nanomaterials Research Center, Research Institute of Donghua University, Shanghai, China
E-mail: Yujy@dhu.edu.cn

c College of Textiles, Donghua University, Shanghai, China

Abstract

The primary goal of the present study is to develop a quartz crystal microbalance (QCM) sensor functionalized by three-dimensional sensing membranes for heavy metal ion detection. The fibrous polystyrene (PS) membranes were stabilized on the QCM electrode and modified with subsequent gold sputtering, followed by the functionalization of the sensing polyethyleneimine. The morphology and specific surface area (SSA) of the PS membranes were controllable by adjusting the weight ratios of the blend solvents of tetrafuran, N,N-dimethylformamide. The resultant sensors with optimal structure showed excellent selectivity for Cr3+ with a detection limit of 5 ppb. Sensor sensitivity increased concurrently with both increasing PS loading and SSA on the electrode of QCM. The sensor responses showed good linearity in the 5–200 ppb concentration range. The results suggest that the fibrous membrane QCM sensors have potential for further applications in other sensors.

Graphical abstract: Sensitive metal ion sensors based on fibrous polystyrene membranes modified by polyethyleneimine

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Article information

DOI
https://doi.org/10.1039/C1RA00673H
Article type
Paper
Submitted
05 Sep 2011
Accepted
13 Nov 2011
First published
15 Dec 2011

RSC Adv., 2012,2, 1373-1378

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Sensitive metal ion sensors based on fibrous polystyrene membranes modified by polyethyleneimine

M. Sun, B. Ding and J. Yu, RSC Adv., 2012, 2, 1373 DOI: 10.1039/C1RA00673H

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