Details

Autor(en) / Beteiligte

• Rabchinskii, M.K.
• Varezhnikov, A.S.
• Sysoev, V.V.
• Solomatin, M.A.
• Ryzhkov, Sergei A.
• Baidakova, M.V.
• Stolyarova, D. Yu
• Shnitov, V.V.
• Pavlov, Sergei S.
• Kirilenko, D.A.
• Shvidchenko, A.V.
• Lobanova, E. Yu
• Gudkov, M.V.
• Smirnov, D.A.
• Kislenko, V.A.
• Pavlov, S.V.
• Kislenko, S.A.
• Struchkov, N.S.
• Bobrinetskiy, I.I.
• Emelianov, A.V.
• Liang, P.
• Liu, Z.
• Brunkov, P.N.

Titel

Hole-matrixed carbonylated graphene: Synthesis, properties, and highly-selective ammonia gas sensing

Ist Teil von

• Carbon (New York), 2021-02, Vol.172, p.236-247

Ort / Verlag

New York: Elsevier Ltd

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Here, the synthesis of holey carbonylated (C-ny) graphene derivative and its application for gas sensing is demonstrated. The carbonylation of graphene oxide leads to the 3-fold increase in the concentration of carbonyl groups’ up to 9 at.% with a substantial elimination of other oxygen functionalities. Such a chemical modification is accompanied by the perforation of the graphene layer with the appearance of matrices of nanoscale holes, leading to corrugation of the layer and its sectioning into localized domains of the π-conjugated network. Combined with the predominant presence of carbonyls, granting the specificity in gas molecules adsorption, these features result in the enhanced gas sensing properties of C-ny graphene at room temperature with a selective response to NH3. Opposite chemiresistive response towards ammonia when compared to other analytes, such as ethanol, acetone, CO2, is demonstrated for the C-ny graphene layer both in humid and dry air background. Moreover, a selective discrimination of all of the studied analytes is further approached by employing a vector signal generated by C-ny multielectrode chip. Comparing the experimental results with the calculations performed in framework of density functional theory, we clarify the effect of partial charge transfer caused by water and ammonia adsorption on the chemiresistive response. [Display omitted] •GO can be converted to the carbonylated graphene containing up to 9 at.% of carbonyls.•Carbonylation leads to holey and corrugated structure of graphene layer.•Holey-matrixed structure and carbonyls enhance graphene gas sensing properties.•Carbonylated graphene exhibits an exceptional selectivity regarding the NH3 detection.