Effect of high-voltage discharge non-thermal plasma on g-C3N4 in a plasma-photocatalyst system

Wang, Xiaoping; Chen, Yixia; Fu, Min; Chen, Zihan; Huang, Qiulin

doi:10.1016/s1872-2067(18)63115-8

Cited by 18 publications

(5 citation statements)

References 60 publications

(78 reference statements)

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“…Compared with CNNS, the positions of C 1s peaks for 10% CuS/CNNS have no significant change, but the peak areas present change to various extents. The N 1s spectra of the sample in Figure c show several peaks at about 398.7, 400.4, 401.4, and 404.3 eV allocated to sp 2 -hybridized N(C–NC), N–(C) 3 , and −NH 2 functional groups and charging effects in heterocycles, respectively . The movement of the peak position and the change of peak area are the same as the result of C 1s spectra.…”

Section: Results and Discussionmentioning

confidence: 64%

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Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets

et al. 2022

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The conversion of solar power to hydrogen (H 2 ) energy efficiently encounters some obstacles due to the lack of superior catalysts and efficient catalytic approaches. Herein, three-dimensional/ two-dimensional (3D/2D) CuS/g-C 3 N 4 photothermal catalysts were obtained via an easy, one-step hydrothermal method after pyrolysis. The favorable heterojunction interface for H 2 production was constructed by snowflake-like CuS embedded in the graphite carbon nitride (g-C 3 N 4 ) nanosheets, leading to the acceleration of charge transfer and separation, decrease of charge transfer distance, and perfect realization of photothermal effects (PTEs) induced by nearinfrared (NIR) light. The 3D/2D CuS/g-C 3 N 4 catalyst presents a topmost H 2 -production rate (1422 μmol h −1 g −1 ) under dual wavelength (420 + 850 nm) and a moderate H 2 -production rate under 420 nm, which are 12-fold and 9-fold higher than pure g-C 3 N 4 , respectively, owing to a strong action from PTEs induced by NIR. The feasible NIR-enhanced photothermal catalysis is expected to apply in multifarious heat-assisted photocatalysis processes by designing multifunctional composites with super PTE and photocatalytic capacity.

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Section: Results and Discussionmentioning

confidence: 64%

“…Figure 4 53 The movement of the peak position and the change of peak area are the same as the result of C 1s spectra. In Figure 4d, the peaks at 951.6 and 931.8 eV are caused by Cu 2p 1/2 and Cu 2p 3/2 of Cu 2+ , respectively, further showing the formation of CuS.…”

Section: Resultsmentioning

confidence: 65%

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets

et al. 2022

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“…DBD plasma induces surface modification that depends on the gas used for the plasma treatment. A high voltage is applied across the electrodes in the gas to create energetic plasma electrons which are then responsible for the generation of reactive radicals and ions [59,60]; these plasma species can interact with solid catalysts and reactants. In the emission spectroscopy of air plasma, an obvious NO was found as a result of the activation and reaction between N 2 and O 2 .…”

Section: Discussionmentioning

confidence: 99%

Plasma-treatment of polymeric carbon nitride for efficient NO abatement under visible light

Zeng¹,

Ni²,

Mariotti³

et al. 2022

J. Phys. D: Appl. Phys.

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Photocatalysis is considered to be efficient in combatting emission nitrogen oxide (NOx), which is one of the atmospheric pollutants affecting human health. Polymeric carbon nitride (PCN) is a low-cost polymeric photocatalyst with a 2-dimensional structure that is sensitive to the visible sunlight in the solar spectrum, but its photocatalytic efficiency needs to be enhanced for the purpose of pollutant abatement. In this study, PCN was treated using a facile ambient pressure dielectric barrier discharge (DBD) plasma in air, Ar and Ar-5% H2 flow. According to the spectroscopic characterization and NO removal tests, the DBD plasma did not destroy the crystal structure of PCN, but improved the separation efficiency of photogenerated charges and enhanced the capacity of NO abatement. The plasma treatment in Ar-5% H2 showed an optimal removal efficiency of 69.19% and a selectivity for nitrate of 90.51% under visible light irradiation. The hydrogen plasma etched the PCN surface, resulting in more defects (carbon vacancies) and carbonyl group on the surface, while the air plasma was found to increase the suspending NOx bonding on the surface for the increased NOx emission under illumination. The generation of high-energy electron and reactive radicals in the electrical discharges could cause the surface modification of PCN for efficient photocatalysis.

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“…However, ZnO is an n-type semiconductor material with a wide band gap, which limits its ability to utilize near-ultraviolet light with shorter wavelengths and higher energy. It is worth noting that NTP generates a wide range of light, including both ultraviolet and visible light [ 15 ]. On the other hand, the generated electron–hole pairs in ZnO are more prone to recombination, resulting in low actual utilization efficiency of photons and insufficient photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Safe Disposal of Accident Wastewater in Chemical Industrial Parks Using Non-Thermal Plasma with ZnO-Fe3O4 Composites

Li,

Wang,

Qian

et al. 2024

Toxics

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Chemical wastewater has a high concentration of toxic and hazardous antibiotic pollutants, which not only devastates the ecological environment and disrupts the ecological balance, but also endangers human health. This research proposed a non-thermal plasma (NTP) combined with a ZnO-Fe3O4 nano-catalyst system to achieve the efficient degradation of ciprofloxacin (CIP) in chemical wastewater. Firstly, ZnO-Fe3O4 composite materials were prepared using hydrothermal method and characterized with scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), etc. With the sole NTP, NTP/ZnO, and NTP/ZnO-Fe3O4 systems, the removal efficiency of CIP can reach 80.1%, 88.2%, and 99.6%, respectively. The optimal doping amount of Fe3O4 is 14%. Secondly, the capture agent experiment verified that ·OH, ·O2−, and 1O2 all have a certain effect on CIP degradation. Then, liquid chromatography–mass spectrometry (LC-MS) was used to detect the intermediate and speculate its degradation pathway, which mainly included hydroxyl addition, hydroxyl substitution, and piperazine ring destruction. After treatment with the NTP/ZnO-Fe3O4 system, the overall toxicity of the product was reduced. Finally, a cyclic experiment was conducted, and it was found that the prepared ZnO-Fe3O4 catalyst has good reusability. The NTP/ZnO-Fe3O4 was also applied in practical pharmaceutical wastewater treatment and has practical applicability.

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Effect of high-voltage discharge non-thermal plasma on g-C3N4 in a plasma-photocatalyst system

Cited by 18 publications

References 60 publications

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets

Plasma-treatment of polymeric carbon nitride for efficient NO abatement under visible light

Safe Disposal of Accident Wastewater in Chemical Industrial Parks Using Non-Thermal Plasma with ZnO-Fe3O4 Composites

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Effect of high-voltage discharge non-thermal plasma on g-C3N4 in a plasma-photocatalyst system

Cited by 18 publications

References 60 publications

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H2 Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C3N4 Nanosheets

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H2 Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C3N4 Nanosheets

Plasma-treatment of polymeric carbon nitride for efficient NO abatement under visible light

Safe Disposal of Accident Wastewater in Chemical Industrial Parks Using Non-Thermal Plasma with ZnO-Fe3O4 Composites

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Product

Resources

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Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets

Near-Infrared-Induced Photothermal Enhanced Photocatalytic H₂ Production for 3D/2D Heterojunctions of Snowflake-like CuS/g-C₃N₄ Nanosheets