TY - JOUR

T1 - In situ XPS Observation of Selective NOx Adsorption on the Oxygenated Graphene Films

AU - Sysoev, Vitalii I.

AU - Okotrub, Alexander V.

AU - Gusel'nikov, Artem V.

AU - Smirnov, Dmitry A.

AU - Bulusheva, Lyubov G.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Graphene derivatives are promising sensor materials due to their high surface area available for molecule adsorption and conductivity changes under the adsorbate impact. The selectivity of such materials can be tuned through the attaching of certain functional groups preferably interacting with the defined gases. In the present work, we compare the reactivity of graphene oxide, oxyfluorinated graphene, and fluorinated graphene toward gaseous NOx molecules. The interaction of the molecules with the graphene-based films was monitored by in situ X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopy measurements. The spectra before and after exposure of the films to a gaseous NOx mixture detected equal concentrations of adsorbed NO2 and NO species on graphene oxide, the preferable interaction of oxyfluorinated graphene with NO2 and the absence of the adsorbed molecules on the fluorinated graphene surface. These results are useful for the development of selective graphene-based gas sensors.

AB - Graphene derivatives are promising sensor materials due to their high surface area available for molecule adsorption and conductivity changes under the adsorbate impact. The selectivity of such materials can be tuned through the attaching of certain functional groups preferably interacting with the defined gases. In the present work, we compare the reactivity of graphene oxide, oxyfluorinated graphene, and fluorinated graphene toward gaseous NOx molecules. The interaction of the molecules with the graphene-based films was monitored by in situ X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopy measurements. The spectra before and after exposure of the films to a gaseous NOx mixture detected equal concentrations of adsorbed NO2 and NO species on graphene oxide, the preferable interaction of oxyfluorinated graphene with NO2 and the absence of the adsorbed molecules on the fluorinated graphene surface. These results are useful for the development of selective graphene-based gas sensors.

KW - graphene oxide

KW - NO adsorption

KW - oxyfluorinated graphene

KW - XPS

KW - OXIDE

KW - AMMONIA

KW - NITROGEN

KW - NH3

KW - NANOSHEETS

KW - GRAPHITE

KW - NOx adsorption

KW - CO

UR - http://www.scopus.com/inward/record.url?scp=85040786980&partnerID=8YFLogxK

U2 - 10.1002/pssb.201700267

DO - 10.1002/pssb.201700267

M3 - Article

AN - SCOPUS:85040786980

VL - 255

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 1

M1 - 1700267

ER -