Graphene sheets decorated with SnO2 nanoparticles: in situ synthesis and highly efficient materials for cataluminescence gas sensors

Abstract

Graphene sheets decorated with SnO 2 nanoparticles were prepared through a facile hydrothermalassisted in situ synthesis route. According to the XPS, XRD, FESEM and TEM analysis, rutile SnO 2 nanocrystals were exclusively deposited on graphene sheets with high density and high uniformity to form layered composite sheets. Propanal, a common volatile organic compound, was selected as a model to investigate the cataluminescence (CTL) sensing properties of the SnO 2 /graphene composite in this paper. It was found that the strong CTL emission could be generated due to the catalyzing oxidization of propanal on the surface of SnO 2 /graphene composite and this composite was an efficient sensing material for propanal. We further studied the analytical characteristics of the CTL sensor based on SnO 2 /graphene composite sensing material for propanal under the optimal experimental conditions. The linear range of the propanal gas sensor was 1.34-266.67 mg mL À1 (r ¼ 0.9987), over two orders of magnitude, and the detection limit was 0.3 mg mL À1 (S/N ¼ 3).

Emerging Corrosion Inhibitors for Interfacial Coating

“…Graphene and graphene derivatives (e.g., graphene/graphite oxide, functionalized graphene, etc.) could be used in various applications such as hydrogen storage [82], sensors [83], transparent conductive films [84], batteries [85,86], super capacitors [87], solar cells [88] and nanocomposites coatings [89][90][91]. Due to the high surface area of graphene sheet (2630 m 2 /g), improvement of mechanical, thermal, and electrical properties of composite graphene based coating could be achieved with very low loading [92].…”

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

“…500 A HRG/SnO 2 based gas sensor showed good sensitivity towards propanol, an important volatile aldehyde used in chemical and medical industries. 501 Sensors based on HRG/SnO 2 nanocomposites were applied for the detection of H 2 S, NH 3 , and NO 2 . 502,503…”

Exploration of nano-surface chemistry for spectral analysis

“…Considering the CL spectra and the fluorescence spectra of YVO 4 : Eu 3+ nanocrystals, an energy transfer mechanism from excited intermediates to the YVO 4 : Eu 3+ nanocrystals was proposed. Recently, Song et al [67] have reported hydrothermal-assisted in situ synthesis of graphene sheets decorated with SnO 2 nanoparticles. Strong CTL emission of propanal on the surface of SnO 2 /graphene composite was found; and this composite was engineered as an efficient, highly sensitive and selective sensor for propanal.…”