Sustainable plasma-catalytic bubbles for hydrogen peroxide synthesis

Zhou, Renwu; Zhang, Tianqi; Zhou, Rusen; Wang, Sen; Mei, Danhua; Mai‐Prochnow, Anne; Weerasinghe, Janith; Fang, Zhi; Ostrikov, Kostya Ken; Cullen, Patrick J.

doi:10.1039/d1gc00198a

Cited by 51 publications

(43 citation statements)

References 64 publications

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“…Previous studies have confirmed that hydrogen peroxide (

) is a key factor in the plasma reduction process of

[ 23 , 25 ].

is a long-lived species that is generated through several pathways [ 35 , 36 , 37 ]. In the plasma jet, gaseous

formed inside the quartz tube is delivered through the nozzle, and aqueous

is generated continuously at the gas−liquid interface and accumulated inside the bulk liquid, resulting in a high concentration of

.…”

Section: Resultsmentioning

confidence: 99%

“…In the plasma jet, gaseous

formed inside the quartz tube is delivered through the nozzle, and aqueous

is generated continuously at the gas−liquid interface and accumulated inside the bulk liquid, resulting in a high concentration of

. In the gas phase, plasma-generated

radicals can recombine to form gaseous

, which can be transported to the gas–liquid interface (Equation (1)) [ 35 ].

was observed at all positions along the plasma jet, as shown in Figure 4 B.…”

Section: Resultsmentioning

confidence: 99%

“…Most of the

formed in the plasma phase is immediately dissolved in water. At the gas–liquid interface, plasma-generated

radicals can be converted to aqueous

, which can be transported into the liquid medium (Equation (2)) [ 35 ]. In the bulk liquid,

radicals can be generated through plasma-induced ultraviolet (UV) photolysis of water, and solvated

radicals can recombine to form

(Equation (3)) [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…Under acidic conditions, plasma-generated superoxide can be converted to H 2 O 2 (Equation ( 4)) [36]. In the plasma-activated water, aqueous H O can be produced by Equations ( 2)-(4) [35][36][37]. To verify the generation of H O by the plasma jet, we treated 4 mL of DI water with a plasma jet for 10 min and quantified the H O concentration of the plasma-treated water.…”

Section: Characteristics Of Plasma-treated Water For Plasma Synthesis Of Gold Nanoparticlesmentioning

confidence: 99%

“…The prepared HAuCl -PEG solution was stable at room temperature for several hours with no significant change in color, suggesting no reduction of Au ions. After the start of plasma treatment, the color of the HAuCl -PEG solution rapidly changed from light In the plasma-activated water, aqueous H 2 O 2 can be produced by Equations ( 2)-(4) [35][36][37]. To verify the generation of H 2 O 2 by the plasma jet, we treated 4 mL of DI water with a plasma jet for 10 min and quantified the H 2 O 2 concentration of the plasma-treated water.…”

Section: Optical and Morphological Properties Of Plasma-synthesized Gold Nanoparticlesmentioning

confidence: 99%

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Structural and Optical Sensing Properties of Nonthermal Atmospheric Plasma-Synthesized Polyethylene Glycol-Functionalized Gold Nanoparticles

2021

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Polyethylene glycol-functionalized gold nanoparticles (Au@PEG NPs) were prepared by a simple plasma-assisted method without additional reducing chemicals. After irradiating tetrachloroauric acid (HAuCl4) and polyethylene glycol (PEG) in aqueous medium with an argon plasma jet, the gold precursor transformed into an Au@PEG NP colloid that exhibited surface plasma resonance at 530 nm. When the plasma jet entered the water, additional reactive species were induced through interactions between plasma-generated reactive species and aqueous media. Interaction of the gold precursor with the plasma-activated medium allowed the synthesis of gold nanoparticles (AuNPs) without reductants. The plasma-synthesized Au@PEG NPs had a quasi-spherical shape with an average particle diameter of 32.5 nm. The addition of PEG not only helped to stabilize the AuNPs but also increased the number of AuNPs. Au@PEG NP-loaded paper (AuNP-paper) was able to detect the degradation of rhodamine B, therefore, indicating that AuNP-paper can act as a surface-enhanced Raman scattering platform. Dye degradation by plasma treatment was investigated by optical absorption and Raman spectroscopy. The method proposed for the fabrication of Au@PEG NPs is rapid, low-cost, and environment-friendly and will facilitate the application of plasma-synthesized nanomaterials in sensors.

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“…Previous studies have confirmed that hydrogen peroxide (

) is a key factor in the plasma reduction process of

[ 23 , 25 ].

is a long-lived species that is generated through several pathways [ 35 , 36 , 37 ]. In the plasma jet, gaseous

formed inside the quartz tube is delivered through the nozzle, and aqueous

is generated continuously at the gas−liquid interface and accumulated inside the bulk liquid, resulting in a high concentration of

.…”

Section: Resultsmentioning

confidence: 99%

“…In the plasma jet, gaseous

formed inside the quartz tube is delivered through the nozzle, and aqueous

is generated continuously at the gas−liquid interface and accumulated inside the bulk liquid, resulting in a high concentration of

. In the gas phase, plasma-generated

radicals can recombine to form gaseous

, which can be transported to the gas–liquid interface (Equation (1)) [ 35 ].

was observed at all positions along the plasma jet, as shown in Figure 4 B.…”

Section: Resultsmentioning

confidence: 99%

“…Most of the

formed in the plasma phase is immediately dissolved in water. At the gas–liquid interface, plasma-generated

radicals can be converted to aqueous

, which can be transported into the liquid medium (Equation (2)) [ 35 ]. In the bulk liquid,

radicals can be generated through plasma-induced ultraviolet (UV) photolysis of water, and solvated

radicals can recombine to form

(Equation (3)) [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Characteristics Of Plasma-treated Water For Plasma Synthesis Of Gold Nanoparticlesmentioning

confidence: 99%

Section: Optical and Morphological Properties Of Plasma-synthesized Gold Nanoparticlesmentioning

confidence: 99%

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Structural and Optical Sensing Properties of Nonthermal Atmospheric Plasma-Synthesized Polyethylene Glycol-Functionalized Gold Nanoparticles

2021

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Plasma‐Assisted Sustainable Nitrogen‐to‐Ammonia Fixation: Mixed‐phase, Synergistic Processes and Mechanisms

Qu,

Zhou,

Sun

et al. 2023

ChemSusChem

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Ammonia plays a crucial role in industry and agriculture worldwide, but traditional industrial ammonia production methods are energy‐intensive and negatively impact the environment. Ammonia synthesis using low‐temperature plasma technology has gained traction in the pursuit of environment‐benign and cost‐effective methods for producing green ammonia. This Review discusses the recent advances in low‐temperature plasma‐assisted ammonia synthesis, focusing on three main routes: N2+H2 plasma‐only, N2+H2O plasma‐only, and plasma coupled with other technologies. The reaction pathways involved in the plasma‐assisted ammonia synthesis, as well as the process parameters, including the optimum catalyst types and discharge schemes, are examined. Building upon the current research status, the challenges and research opportunities in the plasma‐assisted ammonia synthesis processes are outlined. The article concludes with the outlook for the future development of the plasma‐assisted ammonia synthesis technology in real‐life industrial applications.

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Insights into reactivity and bactericidal effects of water activated by He and Ar plasma jets

Lin

Liu

Zhang

et al. 2022

Plasma Processes & Polymers

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Interactions of cold atmospheric-pressure plasma jets (APPJs) and water are important for water purification, chemical synthesis, medicine, and biotechnology. However, the reactivity and bactericidal effects of water activated with jets of different ionized gases remain unclear, especially in the commonly used helium (He)-and argon (Ar)-APPJ systems. Here, He and Ar are used as working gases to produce APPJ for comparing the plasma-induced aqueous reactive species and bacteria inactivation effects in solutions. Experimental results indicate that the Ar plasma jet shows a quicker propagation velocity and higher concentrations of gaseous reactive species, and the gas and electron temperature are different for the He and Ar plasma. Moreover, the higher concentration of aqueous reactive species, such as •OH, •O 2 − /ONOOH, H 2 O 2 , NO 2 − , and NO 3 − , and better bacterial inactivation effects are achieved by the Ar plasma treatment. Water deformation induced from plasma water is found as the reason for the different reactivity and bactericidal effects. Further validation experiments using a film with different pore diameters confirm that the molecular weight of the working gas influences the shape and stability of the cavity induced by the gas flow in the plasma jet, and plays a vital role in the production of aqueous reactive species with variable concentrations.

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Sustainable plasma-catalytic bubbles for hydrogen peroxide synthesis

Abstract: Hydrogen peroxide (H2O2) is a green oxidant widely used in various fields, from water treatment to rocket propellant. Currently, H2O2 is predominantly manufactured via the anthraquinone process, which requires large...

Cited by 51 publications

References 64 publications

Structural and Optical Sensing Properties of Nonthermal Atmospheric Plasma-Synthesized Polyethylene Glycol-Functionalized Gold Nanoparticles

Structural and Optical Sensing Properties of Nonthermal Atmospheric Plasma-Synthesized Polyethylene Glycol-Functionalized Gold Nanoparticles

Plasma‐Assisted Sustainable Nitrogen‐to‐Ammonia Fixation: Mixed‐phase, Synergistic Processes and Mechanisms

Insights into reactivity and bactericidal effects of water activated by He and Ar plasma jets

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