Improvement of Photocatalytic Activity by Zn Doping in Cu2O

Goyal, C. P.; Goyal, Deepak; Ganesh, Venkataraman; Ramgir, Niranjan S.; Navaneethan, M.; Hayakawa, Y.; Muthamizhchelvan, C.; Ikeda, Hiroya; Ponnusamy, S.

doi:10.1134/s1063783420100091

Cited by 12 publications

(9 citation statements)

References 42 publications

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“…The oxygen molecules are reduced by highly exited electrons and form a super oxide radical ( * 𝑂 2 − ) and also, water molecules oxidized by fast-responsive electron holes to form hydroxy radicals (*OH). * 𝑂 2 − 𝑎𝑛𝑑 * 𝑂𝐻 radicals are fully responsible for the photocatalytic degradation of organic pollutants into CO2, H2O and some other inorganic contaminants as a product [34,35].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Dhandapani¹,

Prabhu

Duraisamy³

et al. 2021

Preprint

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In the present work, an attempt to synthesis of bimetallic copper zinc tungstate (CuZnWO4) nanoparticles with reduced graphene oxide (CuZnWO4/rGO) via one-step hydrothermal technique. The synthesized CuZnWO4/rGO composite are characterized by Fourier transform infrared spectroscopy (FTIR), Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis diffuse reflectance spectroscopy (UV-DRS) and Photoluminescence (PL). The photocatalytic performance is examined by the degradation of methylene blue (MB) dye under visible-light irradiation. The MB dye isalmost 73 % degraded within 80 minutes. Further, the electrochemical performance of hybrid CuZnWO4–rGOcomposite showed the specific capacity (SC) of 480 Fg− 1 at 4 Ag− 1 in 6 M KOH electrolyte with excellent cyclabilityconserving a capacitance retention of 127% after 5000 cycles due to increase diffusion of electrolyte ions to the electrode materials. These results support that the hybrid CuZnWO4–rGO composite as an appropriate electrode material for high-performance SCs electrode and an auspicious catalyst for the degradation of dye (organic) contaminants in aqueous media.

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Section: Photocatalytic Activitymentioning

confidence: 99%

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Dhandapani¹,

Prabhu

Duraisamy³

et al. 2021

Preprint

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“…In term of photocatalyst materials, metal-doped Cu2O like Zn has shown better photocatalytic activity. Previous studies showed that Zn-doped Cu2O has a good impact such as lattice shrinkage, band-gap adjustment, surface defects, increased photoelectrochemical properties, and suppressing recombination electron-hole [5][6][7][8][9][10][11][12][13][14]. On the other hand, copper metal and its oxide (Cu2O-Cu) have unique catalytic properties, high abundance, high thermal and electrical conductivity, low toxicity level, costeffective, and a small band gap energy with the range of 1.2-2.2 eV so that it efficiently acts on the visible region and absorbs more photon energy to induce redox reactions and promises for the conversion of solar power into electricity or chemical energy [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of CoNi Cocatalyst to Enhance Ethanol Electrooxidation of Zn-doped Cu2O-Cu Photocatalyst

Utama

Afrizal

2023

Chem. Mater.

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In this research, the electrooxidation of ethanol was catalyzed using Zn-doped Cu2O-Cu/CoNi heterostructure syntesized using an electrodeposition method. Potential deposition of CoNi cocatalyst was varied to obtain the highest photoelectrochemical performance and photocatalytic activity of Zn-doped Cu2O-Cu/CoNi. The photoelectrochemical properties and photocatalytic activity investigated by electrochemical impedance spectroscopy, linear sweep voltammetry, and cyclic voltammetry. The increase of deposition potential from -1.3 V to -1.75 V increased the ethanol oxidation reaction. Zn-doped Cu2O-Cu/CoNi -1.75 V electrode showed superior photocatalytic activity for the ethanol electrooxidation compared to other electrodes. This photocatalyst showed a high photocurrent density of 22.47 mA/cm2. Moreover, cyclic voltammetry tests up to 100 cycles indicated that CoNi deposition potential at -2 V increased the long-term stability of the photocatalyst against the poisoning species than other electrodes. The fraction of CoNi enhanced CO tolerance and contributed to the higher specific activity towards ethanol electrooxidation. An excess number of CoNi at -2 V was found to decrease photocatalytic activity but increase the photostability of the material.

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“…At the same time, electrons react with dissolved oxygen to produce peroxide radicals [15] . Due to the fast recombination rate of photogenerated electrons and holes in Cu 2 O, researchers try to slow down the recombination of photogenerated electrons and holes by doping to solve these shortcomings and improve the photocatalytic efficiency [16] …”

Section: Introductionmentioning

confidence: 99%

“…[15] Due to the fast recombination rate of photogenerated electrons and holes in Cu 2 O, researchers try to slow down the recombination of photogenerated electrons and holes by doping to solve these shortcomings and improve the photocatalytic efficiency. [16] According to the literature survey, rare earth (Ce, Pr, Nd, Eu, Sm) metal ions are commonly used as dopants to improve the optical properties of metal oxides. For example, Yuan et al used hydrothermal technology to synthesize Ce doped Cu 2 O photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Photocatalytic Performance of Pr Doped Cu₂O Under Visible Light

Huang

Xie

et al. 2023

ChemistrySelect

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Cuprous oxide (Cu2O) has a narrow band gap of 2.1–2.3 eV, which facilitates the absorption of visible light and the photocatalytic removal of pollutants from water. However, the catalytic efficiency of Cu2O has been affected by the rapidly compounding carriers in the photocatalytic process. In order to achieve adequate separation of the photogenerated carriers, a straightforward liquid‐phase reduction technique was used in this study to successfully obtain praseodymium‐doped cuprous oxide Pr : Cu2O (0, 1, 3, and 5 mol %). Praseodymium ions were successfully doped into the Cu2O lattice interstitial, as demonstrated by XRD and SEM studies, and the doped praseodymium ions decreased the crystallite size. The FT‐IR peak also confirmed the existence of Cu2O at 631 cm−1. With the increase of Pr doping to 3 %, the band gap gradually decreased to 2.12 eV. Experiments on the degradation of methyl orange (MO) under visible light irradiation showed that 3 % Pr : Cu2O photocatalyst showed the best photocatalytic performance. The Pr doping reduced the recombination of photogenerated electron‐hole pairs and enhanced the photocatalytic activity of Cu2O, according to the analysis results of PL, EIS and transient photocurrent response. Combining these results with active radical capture experiments, the functioning mechanism of the Pr : Cu2O photocatalyst was examined.

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Improvement of Photocatalytic Activity by Zn Doping in Cu2O

Cited by 12 publications

References 42 publications

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Electrodeposition of CoNi Cocatalyst to Enhance Ethanol Electrooxidation of Zn-doped Cu2O-Cu Photocatalyst

The Enhanced Photocatalytic Performance of Pr Doped Cu₂O Under Visible Light

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Improvement of Photocatalytic Activity by Zn Doping in Cu2O

Cited by 12 publications

References 42 publications

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Bifunctional copper-zinc bimetallic tungstate nanoparticles decorated reduced graphene oxide (CuZnWO4/rGO) for high-performance photocatalytic and supercapacitor application

Electrodeposition of CoNi Cocatalyst to Enhance Ethanol Electrooxidation of Zn-doped Cu2O-Cu Photocatalyst

The Enhanced Photocatalytic Performance of Pr Doped Cu2O Under Visible Light

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The Enhanced Photocatalytic Performance of Pr Doped Cu₂O Under Visible Light