Multifunctional CuO Nanosheets for High-Performance Supercapacitor Electrodes with Enhanced Photocatalytic Activity

Budhiraja, Narender; Sapna, .; Kumar, Vinod; Tomar, Monika; Gupta, Vinay; Singh, Satbir

doi:10.1007/s10904-018-0995-4

Cited by 30 publications

(7 citation statements)

References 36 publications

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“…Fourier transform infrared (FTIR) spectroscopy also shows characteristic peaks similar to the peaks of CuO (Figure j). The characteristic peaks at 582 and 517 cm –1 are attributed to Cu–O, and the characteristic peaks at 482, 829, 862, and 923 cm –1 are attributed to Fe–O . Together with the XRD findings, these results indicate that Fe is embedded in the CuO structure and coordinated with CuO instead of forming iron oxides.…”

Section: Resultssupporting

confidence: 55%

“…The characteristic peaks at 582 and 517 cm −1 are attributed to Cu−O, and the characteristic peaks at 482, 829, 862, and 923 cm −1 are attributed to Fe−O. 26 Together with the XRD findings, these results indicate that Fe is embedded in the CuO structure and coordinated with CuO instead of forming iron oxides. With the insertion of Fe, the characteristic peak of Fe− O shifts to a higher wavenumber and the characteristic peak of Cu−O shifts to a low wavenumber.…”

Section: Resultsmentioning

confidence: 51%

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Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Zuo

Guan

et al. 2021

ACS Appl. Mater. Interfaces

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In the field of heterogeneous catalysis, limitations of the surface reaction process inevitably make improving the catalytic efficiency to remove pollutants in water a major challenge. Here, we report a unique structure of Fe surface-gradient-doped CuO that improves the overall catalytic processes of adsorption, electron transfer, and desorption. Interestingly, gradient doping leads to an imbalanced charge distribution in the crystal structure, thereby promoting the adsorption and electron transport efficiency of peroxymonosulfate (PMS). The orbital hybridization of Fe also improves the electronic activity. More importantly, the occupied d-orbital distribution is closer to the lower energy level, which improves the desorption of the reaction intermediate ( 1 O 2 ). As a result, the production and desorption of 1 O 2 have been improved, resulting in excellent BPA degradation ability (kinetic rate increased by 67.3 times). Two-dimensional infrared correlation spectroscopy is used to better understand the doping process and catalytic mechanism of Fe-CuO. Fe−O changes before Cu−O and is more active. The Fe-required active sites, active species intensity, and kinetic reaction rates show a good correlation. This research provides a scientific basis for expanding the purification of toxic organic pollutants in complex water environments by heterogeneous catalytic oxidation.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 51%

Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Zuo

Guan

et al. 2021

ACS Appl. Mater. Interfaces

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“…00-005-0661 confirmed the formation of monoclinic CuO nanoparticles with space group of C 2/ c . 33 The thermal oxidation of Cu 2 O to CuO was well matched with previously reported literature.…”

Section: Resultssupporting

confidence: 87%

Calcination Strategy for Scalable Synthesis of Pithecellobium-Type Hierarchical Dual-Phase Nanostructured Cu_xO to Columnar Self-Assembled CuO and Its Electrochemical Performances

et al. 2021

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The search for low-cost environmentally benign promising electrode materials for high-performance electrochemical application is an urgent need for an applaudable solution for the energy crisis. For this, the present attempt has been made to develop a scalable synthetic strategy for the preparation of pure and dual-phase copper oxide self-hybrid/self-assembled materials from a copper oxalate precursor using the calcination route. The obtained samples were characterized by means of various physicochemical analytical techniques. Notably, we found that the BET surface area and pore volume of copper oxides measured by N 2 adsorption− desorption decrease with the elevation of calcination temperature. From the XRD analysis, we observed the formation of a Cu 2 O cubic phase at low temperatures and a CuO monoclinic phase at high temperatures (i.e., 450 and 550 °C). FTIR and RAMAN spectroscopy were employed for bonding and vibrational structure analysis. The self-assembled dual-phase copper oxide particle as a pithecellobium-type hierarchical structure was observed through SEM of the sample prepared at 350 °C. The surface morphological structure for the samples obtained at 450 and 550 °C was a bundle-like structure developed though columnar selfassembling of the particles. All the above techniques confirmed the successful formation of Cu 2 O/CuO nanoparticles. Afterward, the electrochemical properties of the as-synthesized copper oxides reinforced by introducing carbon black (10% wt) were explored via cyclic voltammetry, electrochemical impedance spectroscopy, and galvanometric charge−discharge analysis. The Cu 2 O system exhibits the maximum specific capacitance performance value of 1355 F/g, whereas in the CuO system (at 450 and 550 °C), it possesses values of 903 and 724 F/g at a scan rate of 2 mV/s. This study reveals that the electrochemical properties of Cu 2 O are better than those of the CuO nanoparticles, which could be ascribed to the high surface area and morphology. The present assessment of the electrochemical properties of the developed material could pave the way to a low-cost electrode material for developing other high-performance hybrid electrodes for supercapacitor or battery applications.

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“…An easy and economical hydrothermal approach has been used to synthesize a nanostructured CuO/RGO hybrid composite material. Preparing three separate morphologies of CuO nanostructures which are bud, flower and plate CuOs via chemical process, cost efficient and scalable synthesis approaches [58,59,60]. The morphological, as well as electrochemical characteristics of CuO structures obtained are examined.…”

Section: Cupric Oxide Electrodementioning

confidence: 99%

Cupric Oxide based Supercapacitors: A Review

Jithul

Samra

2022

J. Phys.: Conf. Ser.

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Energy storage materials are critical for reliable, safe, and flexible energy usage, as well as for using renewable energy sources. As a result, the materials that used to store energy encompass a huge range of materials that are attracting a lot of attention from research and development to industry. Supercapacitors (SCs) have attracted considerable interest as high-power storage device, with the potential to make a contribution to the speedy increase of low-energy electronics (e.g., transportable electronic home equipment, wearable) and military packages. The selection of electrode materials may also have a big impact on the storage capacity of supercapacitors. The review paper discusses the energy storage devices, types of supercapacitors, preparation methods of CuO and advantage of CuO/RGO hybrid nano composite electrode supercapacitors.

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Multifunctional CuO Nanosheets for High-Performance Supercapacitor Electrodes with Enhanced Photocatalytic Activity

Cited by 30 publications

References 36 publications

Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Calcination Strategy for Scalable Synthesis of Pithecellobium-Type Hierarchical Dual-Phase Nanostructured Cu_xO to Columnar Self-Assembled CuO and Its Electrochemical Performances

Cupric Oxide based Supercapacitors: A Review

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Multifunctional CuO Nanosheets for High-Performance Supercapacitor Electrodes with Enhanced Photocatalytic Activity

Cited by 30 publications

References 36 publications

Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

Calcination Strategy for Scalable Synthesis of Pithecellobium-Type Hierarchical Dual-Phase Nanostructured CuxO to Columnar Self-Assembled CuO and Its Electrochemical Performances

Cupric Oxide based Supercapacitors: A Review

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Calcination Strategy for Scalable Synthesis of Pithecellobium-Type Hierarchical Dual-Phase Nanostructured Cu_xO to Columnar Self-Assembled CuO and Its Electrochemical Performances