The effect of TiO2 coatings on the formation of ozone and nitrogen oxides in non-thermal atmospheric pressure plasma

Samuel, C.; Sawtell, David; Banks, Craig E.; Kelly, Peter; Abd‐Allah, Zaenab

doi:10.1016/j.jece.2021.106046

Cited by 8 publications

(4 citation statements)

References 51 publications

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“…However, excessive oxidation results in the formation of undesired byproducts. A study conducted by Capp et al [94] . provides further insights into this phenomenon.…”

Section: Resultsmentioning

confidence: 95%

“…Photocatalysis offers a green and sustainable approach for both the synthesis and degradation of diverse compounds by utilizing light energy to drive environmentally friendly chemical transformations [40–43,94–97] . The fundamental concept of photocatalysis involves the conversion of photon energy ( hv ) into electrical energy within an n‐type semiconductor when exposed to light [98] .…”

Section: Resultsmentioning

confidence: 99%

“…Photocatalysis offers a green and sustainable approach for both the synthesis and degradation of diverse compounds by utilizing light energy to drive environmentally friendly chemical transformations. [40][41][42][43][94][95][96][97] The fundamental concept of photocatalysis involves the conversion of photon energy (hv) into electrical energy within an n-type semiconductor when exposed to light. [98] The band gap of TiO 2 is approximately 3.2 eV, and the minimum wavelength required to generate an electron and hole charge-carrier pair is approximately 382 nm.…”

Section: Role Of Titanium Dioxide In Nitrogen Oxidationmentioning

confidence: 99%

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Sustainable Plasma‐Catalytic Nitrogen Fixation with Pyramid Shaped μ‐Electrode DBD and Titanium Dioxide

Lamichhane,

Pourali,

Rebrov

et al. 2024

ChemistrySelect

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This research explores the potential of electric field enforcement in dielectric barrier discharge using specially designed pyramid‐shaped μ‐electrodes for a plasma‐assisted nitrogen fixation process. The obtained results are compared under varying conditions, including the presence and absence of titanium dioxide ( ), different oxygen concentrations in the nitrogen‐feeding gas, and residence time. The results demonstrate that the μ‐electrodes lead to an enhancement of nitrogen oxidation, which is further intensified by . The introduction of 60–70 % oxygen with nitrogen achieves the highest level of production. The synergistic effect of plasma and the catalytic effect of increase the rate of production by 20 %, resulting in a 23 % increase in energy yield. The introduction of leads to a sharp increase in production even at lower oxygen concentrations. The crucial role played by ultraviolet light‐induced electron‐hole pairs in is highlighted to promote nitrogen oxidation. Nevertheless, it is crucial to emphasize that prolonged residence times may cause the photocatalytic effect to generate alternative byproducts rather than , consequence of excessive oxidation that could prove counterproductive. These findings emphasize the potential of plasma‐assisted nitrogen fixation technology in reducing energy costs and meeting the growing demand for sustainable nitrogen‐based fertilizers.

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“…However, excessive oxidation results in the formation of undesired byproducts. A study conducted by Capp et al [94] . provides further insights into this phenomenon.…”

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

“…Photocatalysis offers a green and sustainable approach for both the synthesis and degradation of diverse compounds by utilizing light energy to drive environmentally friendly chemical transformations. [40][41][42][43][94][95][96][97] The fundamental concept of photocatalysis involves the conversion of photon energy (hv) into electrical energy within an n-type semiconductor when exposed to light. [98] The band gap of TiO 2 is approximately 3.2 eV, and the minimum wavelength required to generate an electron and hole charge-carrier pair is approximately 382 nm.…”

Section: Role Of Titanium Dioxide In Nitrogen Oxidationmentioning

confidence: 99%

See 1 more Smart Citation

Sustainable Plasma‐Catalytic Nitrogen Fixation with Pyramid Shaped μ‐Electrode DBD and Titanium Dioxide

Lamichhane,

Pourali,

Rebrov

et al. 2024

ChemistrySelect

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show abstract

“…Furthermore, better combination with the catalyst can change the discharge modes and generate new reactive species in the packed bed reactor (PBR) [7]. Moreover, the synergistic effects between the plasma and catalysis, which can improve the energy efficiency and the yield, make the PBR become the favorite discharge structure to generate non thermal plasma and be widely applied in the field of nitrogen fixation [8,9], volatile organic compound (VOCs) and toluene degradation [10][11][12], ozone generation [13,14], and CO 2 conversion [15], etc.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Voltage Pulse Shape on the Discharge Characteristics in the Packed Bed Reactor under Air and Nitrogen

Qin

Yang

et al. 2022

Applied Sciences

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In this paper, the packed bed dielectric barrier discharge (DBD) with needle-plate electrode configuration is presented to study the effects of electrical parameters, such as pulse duration and pulse rising and falling time, on discharge characteristics under air and nitrogen. The waveforms of the voltage and the discharge current, discharge evolution images, and the emission spectral of N2 (C3Пu → B3Пg) and N2+ (B2Σu+ → X2Σg+) are collected to investigate the discharge current, as well as the spatial distribution of the discharge modes and the reactive species in the packed bed reactor specifically. It is found that the pulse duration and pulse rising and falling time can regulate the discharge current. Firstly, increasing the pulse duration and the pulse rising and falling time can both increase the discharge duration. Secondly, the peak value of the discharge current has an obvious increasing trend with the pulse duration. Finally, the discharge start time can be delayed by increasing the pulse rising and falling time. A bright discharge channel is distributed at the top of the reactor, while the discharge is diffused at the bottom of the reactor. The generation of N2+ (B2Σu+) tends to depend on the existence of the streamer channel, and N2 (C3Пu) can be generated in the entire discharge area. In addition, the discharge operated in pure nitrogen can reach higher current values, a stronger discharge intensity, and longer existence time for the reactive species than in the air.

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Comparison of Ozone Production in Planar DBD of Different Modes

Li,

Yao,

et al. 2024

Plasma Chem Plasma Process

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The effect of TiO2 coatings on the formation of ozone and nitrogen oxides in non-thermal atmospheric pressure plasma

Cited by 8 publications

References 51 publications

Sustainable Plasma‐Catalytic Nitrogen Fixation with Pyramid Shaped μ‐Electrode DBD and Titanium Dioxide

Sustainable Plasma‐Catalytic Nitrogen Fixation with Pyramid Shaped μ‐Electrode DBD and Titanium Dioxide

The Effect of Voltage Pulse Shape on the Discharge Characteristics in the Packed Bed Reactor under Air and Nitrogen

Comparison of Ozone Production in Planar DBD of Different Modes

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