Reduced graphene oxide functionalized with Cu nanoparticles: Fabrication, structure, and sensing properties

Na, Han Gil; Cho, Hong Yeon; Kwon, Yong Jung; Kang, Suk‐Ju; Lee, Chongmu; Jung, Taek Kyun; Lee, Hyo Soo; Kim, Hyoun Woo

doi:10.1016/j.tsf.2015.03.078

Cited by 16 publications

(3 citation statements)

References 46 publications

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“…3 below), the smaller is the interlayer distance, the more reduced is the material. A similar behavior was previously reported (Huh 2011;Na et al 2015;Some et al 2013).…”

Section: Xrd Characterizationsupporting

confidence: 90%

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

et al. 2015

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This work describes a novel method to prepare reduced graphene oxide (rGO) sheets decorated with copper oxide and copper nanoparticles, by annealing copper foil-supported graphene oxide (GO) under an Ar atmosphere. The GO reduction level, the predominant Cu or Cu 2 O compound, and the particle size strongly depend on the process temperature. Scanning electron microscopy and X-ray diffraction analysis revealed that rGO-Cu 2 O and rGO-Cu nanocomposites developed on the Cu foil surface at the annealing temperatures of 200-600 and 800-1000°C range, respectively. Raman spectroscopy corroborates the effective GO reduction.

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“…3 below), the smaller is the interlayer distance, the more reduced is the material. A similar behavior was previously reported (Huh 2011;Na et al 2015;Some et al 2013).…”

Section: Xrd Characterizationsupporting

confidence: 90%

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

et al. 2015

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“…Intensive works are connected particularly with composites (hybrids) of the type GO/metal oxide [3,8,9,[11][12][13][14][15][16][17][18], where CuO is used as one of these oxides [5,6,10]. Noble (Au, Ag, Pd, Pt) [2,7,[19][20][21][22] and transition metal (Cu, Mn, Fe, Ni, and Co) [23][24][25] nanoparticles decorating GO due to their catalytic effect enhance the gas sensing performance of graphene. GO and its reduced state rGO are interesting from the point of view of sensor applications due to the presence of defect sites and many sites and many functional groups, interacting with the ambient atmosphere, which increases the sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Structure of Reduced Graphene Oxide and Copper Oxide as a Gas Sensor

et al. 2020

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Reduced graphene oxide and copper oxide multilayer structures were fabricated in a planar configuration by deposition on both ceramic and Si/SiO2 substrates with interdigitated Au electrodes by the spray method. SEM (scanning electron microscopy), TEM (transmission electron microscopy), XRD (X-ray diffraction), and elemental analysis investigations indicated that graphene oxide (GO) was obtained in a form of interconnected flakes consisting of 6–7 graphene layers for GO with the total thickness of ca. 6 nm and 2–3 layers for rGO with the total thickness of 1nm. The lateral size of one flake reached up to 10 micrometers. Copper oxide was obtained by the wet chemical method. The number of sequential layers of the sensing structure was optimized to obtain good sensitivity and acceptable response/recovery times in response to the oxidizing nitrogen dioxide atmosphere. Both semiconductor partners revealed p-type conductivity. Formation of isotype heterojunctions between both semiconductor partners was taken into account and their influence on electrical transport explained. Optimized sensor structures revealed relative sensitivities reaching several tens of percent and acceptable response and recovery times in NO2 concentration ranged from a few to 20 ppm. Possibility of manufacturing sensors working at room temperature was shown, but at the cost of prolonged response/recovery times.

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“…The graphene, as a rising star of carbon family, has recently attracted great attention due to its outstanding mechanical, thermal, optical and electrical properties. [12][13][14][15] The graphene oxide (GO) is usually produced by oxidation of graphite using modied Hummer's method 16 with subsequent dispersion and exfoliation in water or suitable organic solvents. Compared with pristine graphite, the presence of covalent oxygenated functional groups in GO renders it strongly hydrophilic, which gives GO good dispersibility in many solvents, particularly in water.…”

Section: Introductionmentioning

confidence: 99%

Preparation of reduced graphene oxide/Co₃O₄ composites and sensing performance to toluene at low temperature

Bai

Sun

et al. 2016

RSC Adv.

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Although the gas sensing properties of p-type semiconductors (such as Co 3 O 4 ) generally are lower than those of n-type oxide semiconductors, high quality gas sensors can still be designed by various modified methods due to their distinctive surface reactivity. In the work, the rGO/Co 3 O 4 composites with different formulations have been successfully synthesized by a facile hydrothermal reaction. The morphology, structure and composition of as-prepared composites were characterized by XRD, FESEM, Raman, TG, XPS spectrum and BET analysis, respectively. The sensing tests indicate that the 5 wt% rGO composite to toluene not only exhibits the highest response and excellent selectivity, but also has linear response in concentration lower 5 ppm, indicating the composite is a promising sensing material for detection of toluene. Furthermore, the mechanism of rGO enhanced composite gas sensing is also discussed in detail, which is attributed to rGO action in composite and the formation of p-p isotype heterojunction at the interface between rGO and Co 3 O 4 .

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Reduced graphene oxide functionalized with Cu nanoparticles: Fabrication, structure, and sensing properties

Cited by 16 publications

References 46 publications

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

Multilayer Structure of Reduced Graphene Oxide and Copper Oxide as a Gas Sensor

Preparation of reduced graphene oxide/Co₃O₄ composites and sensing performance to toluene at low temperature

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Reduced graphene oxide functionalized with Cu nanoparticles: Fabrication, structure, and sensing properties

Cited by 16 publications

References 46 publications

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

In situ synthesis of Cu2O and Cu nanoparticles during the thermal reduction of copper foil-supported graphene oxide

Multilayer Structure of Reduced Graphene Oxide and Copper Oxide as a Gas Sensor

Preparation of reduced graphene oxide/Co3O4 composites and sensing performance to toluene at low temperature

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Preparation of reduced graphene oxide/Co₃O₄ composites and sensing performance to toluene at low temperature