DEVELOPMENT OF A GRAPHENE PAPER-BASED FLEXIBLE SOLID-CONTACT LEAD ION-SELECTIVE ELECTRODE AND ITS APPLICATION IN WATER

被引：11
作者：
Yao, Y. [1 ]
Ying, Y. [1 ]
Ping, J. [1 ]
机构：
[1] Zhejiang Univ, Sch Biosyst Engn & Food Sci, Hangzhou, Zhejiang, Peoples R China
来源：
TRANSACTIONS OF THE ASABE | 2019年 / 62卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Graphene paper; Heavy metal; Ion-selective electrode; Potentiometry; Water sample; POLYMERIC MEMBRANE; OXIDE; SENSOR; LAYER;
D O I：
10.13031/trans.12906
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
A graphene paper-based flexible solid-contact ion-selective electrode (SC-ISE) was developed to detect lead ion sensitively. Graphene paper obtained via a simple vacuum filtration method was used as the electrode substrate for direct coating of an ion-selective membrane. The Nernstian slope of the prepared paper-based potentiometric sensor toward lead ion detection was demonstrated as 29.4 mV per decade. A detection limit as low as 2.5 x 10(-7) mol L-1 was achieved. Reversed chronopotentiometry and water layer test revealed that the graphene paper-based SC-ISE possessed excellent potential stability because of the hydrophobicity of graphene paper. Furthermore, reliable data were obtained from the detection of lead ion levels in real water samples using the graphene paper-based potentiometric sensor, which shows great potential in practical application.
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收藏
页码：245 / 252
页数：8
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