Effects of (Ce, Cu) Co-doping on the Structural and Optical Properties of ZnO Aerogels Synthesized in Supercritical Ethanol

Djouadi, D.; Slimi, Ouidette; Hammiche, L.; Chelouche, A.; Touam, Tahar

doi:10.1088/1742-6596/987/1/012008

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…29 The sharp (002) peak of Fe,Mn,N-FGC catalyst indicates increased crystalline domain of the sample, which reveals that Fe and Mn doping into the carbon matrix leads to decrease of defects in the lattice. 30 None of the samples shows any peak for metallic cluster/nanoparticle, indicating the absence of metal nanoparticle impurity, which was completely etched out during acid washing. 31 X-ray photoelectron spectroscopy (XPS) was employed to confirm the chemical composition and different modes of bonding of heteroatoms in carbonaceous architecture of Fe,Mn,N-FGC catalyst.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…The XRD pattern of the above-mentioned samples shows two peaks at 2θ = 26° and 43° corresponding to (002) and (101) planes of graphitic carbon, respectively . The sharp (002) peak of Fe,Mn,N-FGC catalyst indicates increased crystalline domain of the sample, which reveals that Fe and Mn doping into the carbon matrix leads to decrease of defects in the lattice . None of the samples shows any peak for metallic cluster/nanoparticle, indicating the absence of metal nanoparticle impurity, which was completely etched out during acid washing .…”

Section: Resultsmentioning

confidence: 99%

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Unravelling the Role of Fe–Mn Binary Active Sites Electrocatalyst for Efficient Oxygen Reduction Reaction and Rechargeable Zn-Air Batteries

et al. 2020

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Transition-metal atoms and/or heteroatom-doped carbon nanostructures is a crucial alternative to find a nonprecious metal catalyst for electrocatalytic oxygen reduction reaction (ORR). Herein, for the first time, we demonstrated the formation of binary (Fe–Mn) active sites in hierarchically porous nanostructure composed of Fe, Mn, and N-doped fish gill derived carbon (Fe,Mn,N-FGC). The Fe,Mn,N-FGC catalyst shows remarkable ORR performance with onset potential (E onset) of 1.03 V and half-wave potential (E 1/2) of 0.89 V, slightly better than commercial Pt/C (E onset = 1.01 V, E 1/2 = 0.88 V) in alkaline medium (pH > 13), which is attributed to the synergistic effect of Fe–Mn dual metal center as evidenced from X-ray absorption spectroscopic study. We proposed that the presence of Fe–Mn binary sites is actually beneficial for the O2 binding and boosting the ORR by weakening the OO bonds. The homemade rechargeable Zn–air battery performance reveals the open-circuit voltage of 1.41 V and a large power density of 220 mW cm–2 at 260 mA cm–2 current density outperforming Pt/C (1.40 V, 158 mW cm–2) with almost stable charge–discharge voltage plateaus at high current density. The present strategy enriches a route to synthesize low-cost bioinspired electrocatalyst that is comparable to/better than any nonprecious-metal catalysts as well as commercial Pt/C.

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Section: ■ Results and Discussionmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Unravelling the Role of Fe–Mn Binary Active Sites Electrocatalyst for Efficient Oxygen Reduction Reaction and Rechargeable Zn-Air Batteries

et al. 2020

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“…in which β denotes the FWHM (in degrees) of (002) Miller's plane [30,31]. Here, the lattice constant a is the face-centered-cubic (fcc) structure of CeO 2 crystals, and d (111) is the interplanar spacing between planes using a space lattice equation:…”

Section: Xrd Analysismentioning

confidence: 99%

Enhancing Methyl Orange Degradation with Laser-Generated ZnO and Ce-Doped ZnO Nanoparticles

Ajil,

Ahmed,

Yam

et al. 2023

Applied Sciences

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The presence of Methyl Orange, a hazardous organic compound typically found in industrial wastewater, presents a significant environmental challenge, necessitating the development of effective strategies for its removal to mitigate adverse impacts on aquatic ecosystems and human health. In this work, we utilized 60-watt continuous-wave (CW) and high-power CO2 laser with 10.6 μm wavelength to synthesize Zinc Oxide nanoparticles (ZnO NPs) doped with 1% Cerium (Ce) as photocatalyst at standard laboratory conditions through Laser-Assisted Chemical Bath Synthesis (LACBS) technique. The synthesized nanostructures were thoroughly characterized using UV–vis spectroscopy, field-emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD) techniques. Subsequently, their efficiency in degrading Methyl Orange (MO) dye was evaluated under UV and sunlight irradiation. The findings revealed that the 1% Ce-doped ZnO sample exhibited enhanced photocatalytic efficiency under both UV and sunlight irradiation, as well as active adsorption capabilities in the absence of light. Notably, the most effective photodegradation performance was achieved under solar radiation, with an impressive 95% of MO dye degradation observed after just 90 min of exposure.

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“…It conclude that values of lattice parameters and volume slightly decreases as doping contartion increases from 1 to 5 mol%. This reduction is due to successful replacement of Zn 2+ with ionic redii 0.74Å by Cu 2+ with ionic redii 0.73Å [32][33][34][35].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Photoelectrochemical cell performance Cu doped ZnO photoanode sensitized by xanthene dyes

Kumbhar¹,

Kumbhar²,

Delekar³

et al. 2019

Nanosystems: Phys. Chem. Math.

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In this study transition metal Cu is doped into ZnO framework at 1, 3 and 5 mol% concentrations by sol-gel method and Photoelectrochemical performance under sensitization is recorded. Structural analysis XRD and Raman gives information of wurtzite structure formation without any mislaid peaks. It also informs decrement in crystalline size and lattice parameters as doping level increases. SEM and EDAX provide nono structure formation with appropriate compositions. Optical analysis by FTIR and PL gives peaks at expected positions while DRS UV-visible peaks show humps with red shift due to effect of Cu doping. After structural and morphological study NPs are deposited on conducting glass surface of FTO substrate by doctor blade method and sensitized with mixed xanthene dyes (Eosine Y., Rhodamine B., and Rose Bengal) for 12 h and photoelectrochemical cell performance are recorded under solar simulator under standard AM 1.5 one sun illumination in that 1 % Cu/ZnO photoanode shows good performance as compared to other.

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Effects of (Ce, Cu) Co-doping on the Structural and Optical Properties of ZnO Aerogels Synthesized in Supercritical Ethanol

Cited by 11 publications

References 6 publications

Unravelling the Role of Fe–Mn Binary Active Sites Electrocatalyst for Efficient Oxygen Reduction Reaction and Rechargeable Zn-Air Batteries

Unravelling the Role of Fe–Mn Binary Active Sites Electrocatalyst for Efficient Oxygen Reduction Reaction and Rechargeable Zn-Air Batteries

Enhancing Methyl Orange Degradation with Laser-Generated ZnO and Ce-Doped ZnO Nanoparticles

Photoelectrochemical cell performance Cu doped ZnO photoanode sensitized by xanthene dyes

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