Investigation of NO2 adsorption on reduced graphene oxide

被引：14

作者：

Mattson, E. C. ^{[1
]}

Pande, K. ^{[1
]}

Cui, S. ^{[2
]}

Weinert, M. ^{[1
]}

Chen, J. H. ^{[2
]}

Hirschmugl, C. J. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Milwaukee, WI 53211 USA

[2] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA

来源：

CHEMICAL PHYSICS LETTERS | 2015年 / 622卷

基金：

美国国家科学基金会;

关键词：

ELECTRONIC-STRUCTURE; SUBSTRATE; LAYER; IR;

D O I：

10.1016/j.cplett.2015.01.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption of NO2 on reduced graphene oxide (RGO) is investigated using in situ infrared microspectroscopy and density functional theory (DFT) calculations. NO2/RGO differential absorption spectra show a broadband modulation and the appearance of several vibrational absorption bands, indicating several coexisting adsorbate species. We find that NO2 molecules react with native epoxide groups to form nitrate species. Consequently, the effect of NO2 is, partially, to remove epoxide groups and their distortion of the low-energy electronic structure of graphene, while simultaneously hole-doping the substrate. These results are discussed and related to recent reports on the gas-sensing behavior of RGO. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：86 / 91

页数：6

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