Fabrication of anchored copper oxide nanoparticles on graphene oxide nanosheets via an electrostatic coprecipitation and its application as supercapacitor

Pendashteh, Afshin; Mousavi, Mir F.; Rahmanifar, Mohammad S.

doi:10.1016/j.electacta.2012.10.088

Cited by 368 publications

(137 citation statements)

References 51 publications

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“…There are only a few reports on this aspect [35][36][37], however, in which reduced graphene oxide/cuprous oxide (RGO/Cu 2 O) composites were usually prepared from copper salts with graphene oxide [33-35, 38, 39] …”

Section: Introductionmentioning

confidence: 99%

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Dong

Wang

Zhao

et al. 2014

Journal of Alloys and Compounds

107

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Reduced graphene oxide/cuprous oxide (RGO/Cu2O) composite films were directly synthesized on the surface of copper foil substrates through a straight redox reaction between GO and Cu foil via a hydrothermal approach. Characterization of the resultant composites with X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and field emission scanning electron microscope (FESEM) confirms the formation of Cu2O and reduction of GO, in which Cu2O nanoparticles were well covered by RGO. The resultant composites (referred to as RGO/Cu2O/Cu) were directly used as electrodes for supercapacitors, and their electrochemical performance was assessed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrometry (EIS) in 1 M KOH aqueous solution. A specific capacitance of 98.5 F g−1 at 1 A g−1 was obtained, which is much higher than that of pure Cu2O prepared under the same conditions, due to the presence of RGO. Keywordssupercapacitors, synthesis, rgo, cu2o, composite, films, cu, foil, direct Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsDong, X., Wang, K., Zhao, C., Qian, X., Chen, S., Li, Z., Liu, H. & Dou, S. (2014) at 1 A g -1 was obtained, which is much higher than that of pure Cu 2 O prepared under the same conditions, due to the presence of RGO.

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Section: Introductionmentioning

confidence: 99%

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Dong

Wang

Zhao

et al. 2014

Journal of Alloys and Compounds

107

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“…CuO is a narrow bandgap (1.2 eV) p-type semiconductor with photoconductive and photochemical properties and has found applications in gas sensing [3,4], in catalysis [5][6][7], as antimicrobial agent [8][9][10][11], and in batteries [12], magnetic devices [13][14][15], super capacitors [16], and field emission [17]. TiO 2 is an n-type semiconductor with wide band gap ranging from 3.2 eV to 3.6 eV.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of CuO, TiO₂, and CuO-TiO₂Mixed Oxide by a Modified Oxalate Route

Etape

Ngolui²,

Foba-Tendo

et al. 2017

Journal of Applied Chemistry

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Copper oxide (CuO), titanium oxide (TiO 2 ), and Cu-doped TiO 2 nanoparticles have been synthesized by pyrolysis of their corresponding precursors initially prepared by precipitation in aqueous solution using A. carambola fruit juice as a natural source of the precipitating agent (oxalate). The precursors were synthesized and characterized by FTIR, TGA, and PXRD. The results revealed that the precursors obtained were CuC 2 O 4 , TiO 2 (OH − ) 2 C 2 O 4 , copper-doped titanium hydroxyl oxalate, and copper titanium hydroxyl oxalate. Complete decomposition for the as-prepared precursors containing titanium ions occurs at 600 ∘ C while impurity free copper oxalate decomposed at 450 ∘ C. The as-prepared precursors were decomposed and calcined at 600 ∘ C for 4 hours and the calcination products were characterized by XRD, SEM, and EDX. The results revealed the decomposition products to correspond to CuO, TiO 2 , Cu 0.131 Ti 0.869 O 2 , and CuO/TiO 2 .

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“…C1s XPS spectra for the Norit carbon modified with the 3,4-dihydroxybenzenediazonium salt and the 3,4-dimethoxybenzenediazonium salt correlate well with two contributions at around 286 eV and 287 eV in addition to the reference peak at 284.5 eV. The peak at 286 eV can be assigned to the CeOH and CeOeC contributions depending on whether catechol or dimethoxybenzene units were introduced [16,34,35]. The peak at 287 eV might originate from carbonyl functionalities present at the surface of the pristine Norit carbon or can provide from partial oxidation of catechol groups [35].…”

Section: Resultsmentioning

confidence: 73%

“…The peak at 286 eV can be assigned to the CeOH and CeOeC contributions depending on whether catechol or dimethoxybenzene units were introduced [16,34,35]. The peak at 287 eV might originate from carbonyl functionalities present at the surface of the pristine Norit carbon or can provide from partial oxidation of catechol groups [35]. For the Norit carbon modified with the 3,4-bis((triisopropylsilyl)oxy)benzenediazonium salt, two additional contributions were obtained at 283.5 eV and 285.3 eV, which can be attributed to the CeSi bond and sp 3 -hybridized carbons providing to the silyl protecting groups [36].…”

Section: Resultsmentioning

confidence: 99%

Improvement of electrochemical performances of catechol-based supercapacitor electrodes by tuning the redox potential via different-sized O-protected catechol diazonium salts

Touzé

Gohier

Daffos

et al. 2018

Electrochimica Acta

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a b s t r a c tTwo different O-protected catechol diazonium salts were synthetized and reacted with microporous Norit-S50 carbon to investigate the impact of the protecting group on the electrochemical performances of supercapacitor electrodes in 1 M H 2 SO 4 . Carbon products were characterized by thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) experiments and nitrogen gas adsorptiondesorption measurements to investigate the film composition, as well as the impact of the grafting on the textural properties of the Norit-S50. Supercapacitor electrodes, prepared from carbon products, were studied by cyclic voltammetry at different scan rates and by galvanostatic charge/discharge experiments after deprotection of catechol-attached groups. It was found that the specific charge was improved by introducing catechol groups under protected forms and that the potential at which the redox reaction occurred depends on the protecting group used. With bulky triisopropylsilyl protecting groups, the formal potential of catechol-attached moieties shifted in the positive direction by about 300 mV, yielding an energy gain significantly increased, compared to the same charge stored in the level of catechol groups introduced with methyl protecting groups. 1100 repetitive charge/discharge curves at 1 A g À1 were achieved to study the stability of supercapacitors electrodes. Results obtained were tentatively explained in terms of the porous structure of the carbon.

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Fabrication of anchored copper oxide nanoparticles on graphene oxide nanosheets via an electrostatic coprecipitation and its application as supercapacitor

Cited by 368 publications

References 51 publications

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Synthesis and Characterization of CuO, TiO₂, and CuO-TiO₂Mixed Oxide by a Modified Oxalate Route

Improvement of electrochemical performances of catechol-based supercapacitor electrodes by tuning the redox potential via different-sized O-protected catechol diazonium salts

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Fabrication of anchored copper oxide nanoparticles on graphene oxide nanosheets via an electrostatic coprecipitation and its application as supercapacitor

Cited by 368 publications

References 51 publications

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Direct synthesis of RGO/Cu2O composite films on Cu foil for supercapacitors

Synthesis and Characterization of CuO, TiO2, and CuO-TiO2Mixed Oxide by a Modified Oxalate Route

Improvement of electrochemical performances of catechol-based supercapacitor electrodes by tuning the redox potential via different-sized O-protected catechol diazonium salts

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Synthesis and Characterization of CuO, TiO₂, and CuO-TiO₂Mixed Oxide by a Modified Oxalate Route