Study of the NO2 sensing mechanism of PEDOT-RGO film using in situ Raman Spectroscopy

被引：30

作者：

Dunst, K. J. ^{[1
]}

Trzcinski, K. ^{[2
]}

Scheibe, B. ^{[3
]}

Sawczak, M. ^{[4
]}

Jasinski, P. ^{[1
]}

机构：

[1] Gdansk Univ Technol, Fac Elect Telecommun & Informat, Narutowicza 11-12, PL-80233 Gdansk, Poland

[2] Gdansk Univ Technol, Fac Chem, Narutowicza 11-12, PL-80233 Gdansk, Poland

[3] Adam Mickiewicz Univ, NanoBioMed Ctr, Umultowska 85, PL-61614 Poznan, Poland

[4] Polish Acad Sci, Inst Fluid Flow Machinery, Fiszera 14, PL-80231 Gdansk, Poland

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 260卷

关键词：

In situ Raman spectroscopy; PEDOT-RGO; NO2 gas sensor; CHEMICALLY-MODIFIED ELECTRODES; REDUCED GRAPHENE OXIDE; ELECTROCHEMICAL OXIDATION; IMPEDANCE SPECTROSCOPY; COUNTER ELECTRODE; POLY(3,4-ETHYLENEDIOXYTHIOPHENE); SENSOR; POLYPYRROLE; POLYANILINE; NANOCOMPOSITE;

D O I：

10.1016/j.snb.2018.01.089

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this work, the mechanism of the NO2 reaction with PEDOT-RGO composite film has been investigated via in situ Raman spectroscopy. Reduced graphene oxide (RGO), poly(3,4-ethylenedioxytiophene)-reduced graphene oxide (PEDOT-RGO) and poly(3,4-ethylenedioxytiophene)/ClO4- (PEDOT/ClO4-) films were fabricated using an electrodeposition method method and used as resistance sensors of gaseous nitrogen dioxide. The experimental results indicate that NO2 causes overoxidation of the PEDOT polymer (PEDOT/ClO4- film) which leads to resistance increase and irreversible response. In contrast, the PEDOT-RGO response in the presence of NO2 is reversible. During short NO2 exposure, PEDOT from the PEDOT-RGO composite does not react to the gas but the presence of RGO in the PEDOT-RGO composite does not affect the overoxidation potential. It was found that the nitrogen dioxide reacts more readily to reduced graphene oxide, thus RGO "protects" the polymer against the adverse overoxidation process. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1025 / 1033

页数：9

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