Photocatalytic oxidation of nitric oxide from simulated flue gas by wet scrubbing using ultraviolet/TiO2/H2O2 process

Zhang, Bo; Zhong, Zhaoping; Fu, Zongming

doi:10.1007/s11771-015-2497-7

Cited by 2 publications

(2 citation statements)

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“…The photodegradation capability exhibited by the PI/TiO 2 microfibers in the presence of H 2 O 2 is assessed by assessing the degradation rate of the cationic dye RhB under simulated sunlight. Under excitation by incident light, H 2 O 2 rapidly undergoes photolysis to form • OH, a highly oxidizing species that can effectively degrade pollutants. , H 2 O 2 also acts as an electron acceptor, capturing electrons from the CB of TiO 2 , thereby optimizing charge carrier separation to boost performance and achieving efficient degradation of RhB. − Ensuring adsorption–desorption equilibrium by maintaining the system in darkness for a period of 30 min. Figure a shows the curve of RhB degradation concentration of TiO 2 nanorods, PI nanofibers, and PI/TiO 2 microfibers prepared, and the degradation efficiencies of TiO 2 nanorods and PI nanofibers against RhB are 62.2 and 84.0%, respectively, within 2 h. It can be seen that the PI/TiO 2 microfibers have excellent photocatalytic performance for the degradation of RhB, and the degradation efficiency difference between samples is not large.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Li,

Guo,

Liu

et al. 2023

Langmuir

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Herein, a series of polyimide (PI)/titanium dioxide (TiO 2 ) organic−inorganic flexible composite microfibers with high photocatalytic performance and good reusability were prepared by combining electrospinning technology and a hydrothermal method. Under simulated sunlight, the photocatalytic characteristics of the as-prepared PI nanofibers, TiO 2 nanorods, and PI/ TiO 2 microfibers were evaluated with photocatalytic degradation of Rhodamine B (RhB) solution. Among the tested samples, PI/ TiO 2 -3 mL hydrochloric acid-160 °C-14 h (PI/TiO-3-160-14) (100%) exhibited a superior photocatalytic degradation rate compared to pure PI (84.0%) and TiO 2 (62.2%). The enhancement of the photocatalytic performance was attributed to the Zscheme heterojunction mechanism. When the interface was irradiated by simulated sunlight, the band edge bending, built-in electric field, and Coulomb interaction synergistically facilitated the separation and transport of electron−hole pairs in the heterojunction. This enhanced the oxidation and reduction abilities of the valence and conduction bands of PI/TiO 2 . These results were adequately verified by X-ray photoelectron spectroscopy (XPS) analyses and radical trapping experiments. Additionally, PI/TiO 2 microfibers also demonstrated excellent photocatalytic activity toward methylene blue (MB, 81.4%), methyl orange (MO, 95.9%), and malachite green (KG, 98.9%), underscoring the versatile applicability of PI/TiO 2 . Further supplementary investigations illustrated that PI/TiO 2 microfibers also possess excellent photostability during our extensive recycling photocatalytic experiments.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Li,

Guo,

Liu

et al. 2023

Langmuir

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“…2,4-DMQ could poison the external acid sites of the HZSM-5 catalyst selectively. However, when it was adsorbed on the external acid sites, the benzene ring in its structure could easily suffer from electrophilic substitution reactions with other chemicals and function as an aromatic coke precursor, [19][20][21][22][23] thus resulting in the production of polycyclic aromatic hydrocarbons and promotion of coke formation. Consequently, the carbon yields of the target products decreased but the coke yield increased.…”

Section: Catalytic Conversion Of Furan Over 24-dmq/hzsm-5 Catalystmentioning

confidence: 99%

Reducing coke formation in the catalytic fast pyrolysis of bio-derived furan with surface modified HZSM-5 catalysts

et al. 2015

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In order to reduce coke yield during biomass catalytic fast pyrolysis process, MgO and 2,4-dimethylquinoline (2,4-DMQ) were selected to deposit the external acid sites of HZSM-5. Both MgO and 2,4-DMQ deposition could cause a reduction in total acid sites (both weak acid sites and strong acid sites) and external acid sites of HZSM-5.The modified catalysts were used for catalytic conversion of bio-derived furan. For MgO/HZSM-5 catalyst, the effects of deposited amount and deposited time were studied. The carbon yields of aromatics, C 2 -C 5 olefins, total chemicals, CO 2 and CO increased at first and then decreased slightly when deposited amount increased, while the carbon yield of coke decreased first and then increased gradually. Besides, with the deposited time increased, the carbon yields of petrochemicals, CO 2 and CO increased greatly, whereas that of coke decreased. For 2,4-DMQ/HZSM-5 catalyst, the effects of 2,4-DMQ treatment amount and treatment time were investigated. The experimental results illuminated that the increase in 2,4-DMQ treatment amount or treatment time could retard the generation of target products, CO 2 and CO but promote coke formation.

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Photocatalytic oxidation of nitric oxide from simulated flue gas by wet scrubbing using ultraviolet/TiO2/H2O2 process

Cited by 2 publications

References 20 publications

Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Reducing coke formation in the catalytic fast pyrolysis of bio-derived furan with surface modified HZSM-5 catalysts

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Photocatalytic oxidation of nitric oxide from simulated flue gas by wet scrubbing using ultraviolet/TiO2/H2O2 process

Cited by 2 publications

References 20 publications

Highly Efficient and Reusable PI/TiO2 Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Highly Efficient and Reusable PI/TiO2 Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Reducing coke formation in the catalytic fast pyrolysis of bio-derived furan with surface modified HZSM-5 catalysts

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Product

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Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight

Highly Efficient and Reusable PI/TiO₂ Organic–Inorganic Microfibers for Sustainable Photocatalytic Degradation of Multiple Organic Pollutants under Simulated Sunlight