Non-enzymatic amperometric detection of hydrogen peroxide using grass-like copper oxide nanostructures calcined in nitrogen atmosphere

Gao, Peng; Gong, Yuxuan; Mellott, Nathan P.; Liu, Dawei

doi:10.1016/j.electacta.2015.05.037

Cited by 41 publications

(13 citation statements)

References 48 publications

(55 reference statements)

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“…In case of Cu 2 O, which have a filled ground state (d 10 ) configuration, such a transition is not possible and would not result in the satellite peak . Also core level spectrum for O 1s (Figure S3b in Supporting Information) confirms the formation of CuO bonds associated with CuO . Both XPS and FTIR results are consistent with TEM measurements.…”

Section: Resultssupporting

confidence: 70%

“…Additionally, the presence of the satellite peaks (from 940 to 946 eV and 960 to 965 eV) on the higher binding energy side of the Cu 2p main peaks confirms the formation of pure CuO phase . CuO exhibits an unfilled d 9 configuration in its divalent state, wherein Cu contributes a d‐electron from its completed d‐shell for bonding with oxygen; on the contrary, Cu 2 O would show a filled d 10 configuration in ground state.…”

Section: Resultsmentioning

confidence: 82%

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Ultra‐small CuO nanoparticles with tailored energy‐band diagram synthesized by a hybrid plasma‐liquid process

Velusamy

Liguori

Macías-Montero

et al. 2017

Plasma Processes & Polymers

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CuO is a versatile p-type material for energy applications capable of imparting diverse functionalities by manipulating its band-energy diagram. We present ultrasmall quantum confined cupric oxide nanoparticles (CuO NPs) synthesized via a simple one-step environmentally friendly atmospheric pressure microplasma synthesis process. The proposed method, based on the use of a hybrid plasma-liquid cell, enables the synthesis of CuO NPs directly from solid metal copper in ethanol with neither surfactants nor reducing agents. CuO NPs films are then used for the first time in all-inorganic third generation solar cell devices demonstrating highly effective functionalities as blocking layer. K E Y W O R D Sband structure, cupric oxide quantum dots, one step-green synthesis, quantum dots/inorganic solar cells | INTRODUCTIONTransition metal oxides, due to their inertness, stability, raw material abundance, and low-cost, are highly desirable materials for many applications, for example, solar cells, supercapacitors, light emitting diodes, photodetectors, field effect transistors, batteries and bio and gas sensors, among others. [1][2][3][4][5][6][7][8][9][10] Furthermore, as with other materials, at the nanoscale, metal-oxides can present interesting, important and tunable size-dependent optoelectronic properties. [7,11,12] Metal-oxides are generally characterized by very wide bandgaps, whereas CuO is a p-type low bandgap (∼1.2 eV in bulk form) and nontoxic material. [13][14][15][16][17][18] The possibility of manipulating the CuO bandgap, through quantum confinement, from 1.2 (bulk) to >2 eV [13,[16][17][18][19][20][21][22] is an exciting opportunity as it would make CuO a highly versatile and attractive material for a range ofThe copyright line for this article was changed on 20 April, 2017 after original online publication.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. applications; for instance, it would be possible to use CuO nanoparticles with tunable properties as absorber or transport/ blocking layers in photovoltaic devices.Various physical, chemical, and physicochemical techniques have been employed for synthesizing CuO nanostructures with varying size and shape. [16,18,20,23,24] However, these techniques suffer from numerous disadvantages including complex and time consuming steps, high temperatures, inert atmosphere, expensive source materials, toxic organic solvents, and surfactants. [23,25,26] Furthermore, the control of the resulting morphology, crystallinity, and agglomeration of the nanostructures is a significant challenge which demands additional cleaning steps to remove undesired by-products and chemical impurities or residues. [23,[26][27][28][29] The presence of surfactant or ligand chemistries is essential for minimizing particle coalescence and agglomeration during standard colloid synthesis; however, such chemistries impact significantly on the res...

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Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 82%

Ultra‐small CuO nanoparticles with tailored energy‐band diagram synthesized by a hybrid plasma‐liquid process

Velusamy

Liguori

Macías-Montero

et al. 2017

Plasma Processes & Polymers

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“…As can be seen from Table , the linear range of Fe 3 O 4 nanodots–ITO is only lower than that of Cu 2 O/Cu nanocomposite modified electrode, Ag-SiO 2 modified glassy carbon electrode (GCE), and AuPd-GR modified ITO electrode and is wider than those of the other sensors. The current sensitivity was found to be 191.57 μA mM –1 cm –2 to H 2 O 2 for Fe 3 O 4 nanodots–ITO, indicating that the present sensor has high sensitivity compared with those of other H 2 O 2 sensors. − Therefore, we can conclude that the Fe 3 O 4 nanodots–ITO can be used as an enzyme-free platform for the effective determination of H 2 O 2 with wide linear range, low detection limit, and high sensitivity and selectivity.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Sensing of Hydrogen Peroxide Using Block Copolymer Templated Iron Oxide Nanopatterns

et al. 2017

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A new enzyme-free sensor based on iron oxide (FeO) nanodots fabricated on an indium tin oxide (ITO) substrate via a block copolymer template was developed for highly sensitive and selective detection of hydrogen peroxide (HO). The self-assembly-based process described here for FeO formation is a simple, cost-effective, and reproducible process. The HO response of the fabricated electrodes was linear from 2.5 × 10 to 6.5 mM with a sensitivity of 191.6 μA mMcm and a detection limit of 1.1 × 10 mM. The electrocatalytic activity of FeO nanodots toward the electroreduction of HO was described by cyclic voltammetric and amperometric techniques. The sensor described here has a strong anti-interference ability to a variety of common biological and inorganic substances.

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“…(Choudhury et al 2013). The reduction in crystallinity may be associated with the formation of crystals with structural defects, which favor the formation of a larger number of catalytic sites (Gao et al 2015a).…”

Section: Spectroscopic Studies For the Formation Of Cuo/cu 2 [Fe(cn) mentioning

confidence: 99%

Structural reorganization of CuO/Cu2[Fe(CN)6] nanocomposite: characterization and electrocatalytic effect for the hydrogen peroxide reduction

Rodrigues

Nascimento

Silva

et al. 2020

An. Acad. Bras. Ciênc.

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We report the study on the formation of the Cu 2 [Fe(CN) ] nanocomposite, which was obtained from copper oxide nanoparticles (CuO NPs) and Prussian Blue precursors. UV-vis analysis indicated that Cu 2+ ions are released from CuO NPs, while Fe 3+ ions are adsorbed onto the structure of CuO due to a sharp increase in zeta potential (from-30 to 0 mV) after the formation of the Cu 2 [Fe(CN) 6 ]. Moreover, energy dispersive spectroscopy confi rmed that Fe 3+ ions are trapped in the CuO NPs structure. The CuO/ Cu 2 [Fe(CN) 6 ] nanocomposite exhibited the monoclinic and face-centered cubic phases that correspond to the CuO and Cu 2 [Fe(CN) 6 ] components. Cyclic voltammetry (CV) for the Nanocomposite modifi ed electrode revealed two well-defi ned redox couples at-0.073 ((E 1/2) 1) and 0.665 mV ((E 1/2) 2), attributed to the conversion of Cu 2+ to Cu + and CuFe 2+ CuFe 3+ pairs, respectively, which is similar to those in the CuO and Cu 2 [Fe(CN) 6 ] components. Furthermore, the catalytic activity of the nanocomposite towards hydrogen was investigated through CV, where the reduction of H 2 O 2 led to increased currents for the electrochemical process associated with the fi rst redox pair. In contrast, for isolated materials (CuO NPs and Cu 2 [Fe(CN) 6 ]), there was no signifi cant increase in the current associated with either redox pair.

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Non-enzymatic amperometric detection of hydrogen peroxide using grass-like copper oxide nanostructures calcined in nitrogen atmosphere

Cited by 41 publications

References 48 publications

Ultra‐small CuO nanoparticles with tailored energy‐band diagram synthesized by a hybrid plasma‐liquid process

Ultra‐small CuO nanoparticles with tailored energy‐band diagram synthesized by a hybrid plasma‐liquid process

Electrochemical Sensing of Hydrogen Peroxide Using Block Copolymer Templated Iron Oxide Nanopatterns

Structural reorganization of CuO/Cu2[Fe(CN)6] nanocomposite: characterization and electrocatalytic effect for the hydrogen peroxide reduction

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