Integrated technique of pulsed laser irradiation and sonochemical processes for the production of highly surface-active NiPd spheres

Yu, Yiseul; Theerthagiri, Jayaraman; Lee, Seung Jun; Govarthanan, Muthusamy; Ashokkumar, Muthupandian; Choi, Myong Yong

doi:10.1016/j.cej.2021.128486

Cited by 135 publications

(41 citation statements)

References 37 publications

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“…The fluid eddy was realized by mechanical mixing. The liquid height [4] was determined based on the wavelength (λ) of the applied frequency (f), namely, λ = c s /f where c s was obtained as 1469.60 m⋅s −1 with the modified temperature equation (Eq. S34).…”

Section: Resultsmentioning

confidence: 99%

“…The alternative US-based advanced oxidation processes (AOPs), as the promising and friendly treatment technologies with physicochemical processes of cavitation (gas-phase reaction zone effective temperature, ≈ 5200 K, and high pressure, in the range of hundreds of bars), pyrolysis (breaking chemical bonds, and yielding hydroxyl radicals (Eq. (1) ) [4] ), supercritical water oxidation (depth and temperature of the liquid-phase reaction zone, ≈ 0.2 μm and ≈ 1900 K, respectively), and violent turbulence [5] , [6] ; meanwhile, especially as the sono-catalysis technologies to activate oxidizing agents to produce active species to form combined system [5] , [6] , [7] , have attracted particular concern for environmental remediation. Herein, as a kind of oxidizing agent, persulfate (involving peroxymonosulfate (HSO 5 − , PMS) or peroxydisulfate (S 2 O 8 2− , PDS)) with direct oxidizing or producing SO 4 • − (E 0 (SO 4 • − /SO 4 2− ) = 2.60 – 3.10 V NHE ) by activation to improve the oxidizing capacity [8] via physicochemical means (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Zhang

Leng

et al. 2021

Ultrasonics Sonochemistry

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Highlights The novel foamed-ZVI activating persulfate/chlorite by ultrasonic was applied. The real-time and online continuous detections tracked radicals transformation. The EPR spectra with different systems in different mixtures were detected. The free or non-free radicals processes induced by US were explored. The dynamics on cavitation and the US-field simulation were presented.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Zhang

Leng

et al. 2021

Ultrasonics Sonochemistry

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“…Electrochemical hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and methanol oxidation reaction (MOR) are the key reactions underlying these processes. Hence, the materials, which could be potentially utilized in these applications are of great interest 1‐4 . Early studies have mainly reported the noble metal electrocatalysts with high performance 5‐8 .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional photo‐electrocatalysts of copper sulfides prepared via pulsed laser ablation in liquid: Phase formation kinetics and photo‐electrocatalytic activity

Begildayeva

Chinnadurai

Lee

et al. 2022

Intl J of Energy Research

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Summary Designing a highly efficient and less expensive electrocatalyst for electrolyzers and fuel cells is of great importance to creating a sustainable future energy source. Herein, we applied a unique and extremely facile pulsed laser ablation in the liquid synthesis route for the fabrication of phase‐engineered CuxSy nanospheres. The multifunctionality of these catalysts was assessed by examining the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and methanol oxidation reaction (MOR). As a result, low overpotentials of 390 mV (HER) and 440 mV (OER) were achieved for sulfur‐rich and copper‐rich samples in alkaline media, respectively. Furthermore, the high selectivity of Cu over methanol and the high number of electrochemically accessible active sites equal to 7.9 × 1016 promoted the MOR with a current density of 28.3 mA/cm2 at the vertex potential. It is worth emphasizing that in this research, we consider the electrocatalyst's initial electrocatalytic water decomposition function to gain a better understanding of the photoelectrocatalytic behavior. Using a beneficial photo‐assisted electrochemical method, a high OER catalytic activity was obtained under light irradiation due to the large light absorption coefficients of the synthesized electrocatalysts, which facilitated electron transfer at the electrode‐electrolyte interface.

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“…14 Additionally, in order to solve the stability problem, synthetic methodologies must include doping and/or composites, which are supporting materials. 15 Iron has often been studied, especially in magnetic applications due to the ferromagnetic nature of trivalent Fe:ZnO (Fe x Zn y V1−x−yO 2 ), and is also preferred in the development of optical communication and optoelectronic devices. 16 In addition, Fe has a role in improving charge carrier transport by introducing impurity energy band states of ZnO.…”

Section: Introductionmentioning

confidence: 99%

Defect Emission Energy and Particle Size Effects in Fe:ZnO Nanospheres Used in Li-Ion Batteries as Anode

Sarf

Kızıl

2021

J. Electron. Mater.

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Pure and Fe-doped ZnO (Fe x Zn y V1−x−yO 2 ) nanostructures with varying iron mole percentages of 3%, 4.5%, and 6% were synthesized by co-precipitation without vacuum ambient. Structural, morphological, defect, and electrochemical properties, when serving as an anode in Li-ion batteries, were studied. All the samples have a wurtzite ZnO crystallinity, and a slight shift from the x-ray diffraction patterns of Fe:ZnO samples shows that Fe 3+ ions were substituted by Zn 2+ ions. As the percentage of the Fe mole increases from 3% to 4.5%, the size of the particles decreases from 12 nm to 9 nm, but increases to 14 nm with 6% Fe doping. Although all the samples have a spherical type, and porous surfaces are exhibited in the 4.5% Fe:ZnO nanospheres. The emission bands originate due to energy levels generated by ZnO intrinsic defects in all the samples with changing emission peaks by Fe doping. The 4.5% Fe:ZnO results substantially enhance the specific capacity of 400 mAh g −1 during 100 cycles.

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Integrated technique of pulsed laser irradiation and sonochemical processes for the production of highly surface-active NiPd spheres

Cited by 135 publications

References 37 publications

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Ultrasonic role to activate persulfate/chlorite with foamed zero-valent-iron: Sonochemical applications and induced mechanisms

Multifunctional photo‐electrocatalysts of copper sulfides prepared via pulsed laser ablation in liquid: Phase formation kinetics and photo‐electrocatalytic activity

Defect Emission Energy and Particle Size Effects in Fe:ZnO Nanospheres Used in Li-Ion Batteries as Anode

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