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15 results on '"Edelmannová, Miroslava Filip"'

7. Exploring next-generation X(NO3)Y (X = Na+, K+, Sr2+, Ag+; Y=1, 2) electrolytes for enhanced TiO2 nanotube hydrogen generation

Author

Berezenko, Viktoriia, primary, Hanif, Muhammad Bilal, additional, Sihor, Marcel, additional, Zeng, Yilan, additional, Edelmannová, Miroslava Filip, additional, Reli, Martin, additional, Iftikhar, Hussain, additional, Khan, Muhammad Zubair, additional, Plecenik, Tomas, additional, Gregor, Maros, additional, Roch, Tomas, additional, Monfort, Olivier, additional, Koci, Kamila, additional, and Motola, Martin, additional

Published
2024
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9. TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: widely employed still an ambiguous system

Author

Chakib, Alaoui, primary, Mohamed, Karmaoui, additional, Bekka, Ahmed, additional, Edelmannová, Miroslava Filip, additional, Jesus, Juan, additional, navas, javier, additional, Wassila, Touati, additional, Kadi allah, Imene, additional, Figueiredoe, Bruno, additional, Labrincha, Joao Antonio, additional, Koci, Kamila, additional, and Tobaldi, David Maria, additional

Published
2023
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11. Photocatalytic degradation of methanol-water in presence of g-C3N4 and graphene/g-C3N4.

Author

TOUATI, Wassila, primary, Bekka, Ahmed, additional, Karmaoui, Mohamed, additional, Furgeaud, Clarisse, additional, Alaoui, Chakib, additional, Kadi allah, Imene, additional, Edelmannová, Miroslava Filip, additional, Figueiredo, Bruno, additional, Labrincha, João António, additional, Arenal, Raul, additional, Koci, Kamila, additional, and Tobaldi, David Maria, additional

Published
2022
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12. Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4

Author

Touati, Wassila, primary, Karmaoui, Mohamed, additional, Bekka, Ahmed, additional, Edelmannová, Miroslava Filip, additional, Furgeaud, Clarisse, additional, Chakib, Alaoui, additional, Allah, Imene kadi, additional, Figueiredo, Bruno, additional, Labrincha, J. A., additional, Arenal, Raul, additional, Koci, Kamila, additional, and Tobaldi, David Maria, additional

Published
2022
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13. Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4.

Author

Touati, Wassila, Karmaoui, Mohamed, Bekka, Ahmed, Edelmannová, Miroslava Filip, Furgeaud, Clarisse, Chakib, Alaoui, Allah, Imene kadi, Figueiredo, Bruno, Labrincha, J. A., Arenal, Raul, Koci, Kamila, and Tobaldi, David Maria

Subjects
INTERSTITIAL hydrogen generation, BAND gaps, CHEMICAL stability, PHOTOCATALYSTS, CARBON monoxide
Abstract

Graphitic carbon nitride (g-C3N4), possessing high thermal and chemical stability, non-toxicity, facile synthesis, and low band gap energy is a promising candidate for photocatalytic applications. In this study, bulk and exfoliated g-C3N4 were synthesised from different precursors (melamine and urea). Moreover, the surface of bulk g-C3N4 and exfoliated g-C3N4 was modified with graphene (0.5 wt% and 1 wt%) aiming to obtain a prolonged carrier lifetime. The effect of g-C3N4 synthesis from various precursors and the influence of graphene content on the photocatalytic activity during the degradation of a water–methanol mixture under UVC irradiation were examined, in comparison to commercial P25. Hydrogen, methane and carbon monoxide were the decomposition products; hydrogen was the main product of decomposition, whereas CH4 and CO resulting from the reduction of CO2 were generated in a significantly smaller amount. All the produced photocatalysts, whether pure or modified with graphene, exhibited higher activity than the commercial photocatalyst P25. [ABSTRACT FROM AUTHOR]

Published
2022
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14. Photocatalytic reduction of CO2over Ti3+self-doped TiO2-based nanomaterials

Author

Ricka, Rudolf, Wanag, Agnieszka, Kusiak-Nejman, Ewelina, Moszyński, Dariusz, Edelmannová, Miroslava Filip, Reli, Martin, Baďura, Zdeněk, Zoppellaro, Giorgio, Zbořil, Radek, Morawski, Antoni W., and Kočí, Kamila

Abstract

In this study, we explored the photocatalytic efficacy of Ti3+-doped TiO2-based photocatalysts for CO2reduction. The Ti3+self-doped photocatalysts were synthesized using a straightforward chemical reduction with sodium borohydride (NaBH4). Our investigation aimed to elucidate the intricate interplay between the synthesis process and the quantity of NaBH4reductant on the physical-chemical and photocatalytic attributes of the defective TiO2-based photocatalysts. We explored three different commercially available TiO2materials labeled P25, (S)TiO2, and KRONOClean7050, which were reduced (2 g of TiO2) with 0.75 and 1.5 g of NaBH4. The reduction with 0.75 g of NaBH4led to a significant decrease of photocatalytic activity in all three cases. It was caused by clogging of the photocatalysts surface by sodium ions which resulted in the surface recombination of charge carriers. Oppositely, the reduction with 1.5 g of NaBH4, led to an increase of the photocatalytic activity with superior performance of KRONOClean7050. The comprehensive characterization of all the samples explained this superior performance of KC7050_RED_1.5 sample. Importantly, it did not contain any amorphous phase and the crystal size was two times higher compared to other 2 samples reduced by 1.5 g of NaBH4. In the addition to higher crystallinity, the formation of a disordered TiO2−xlayer, enriched with Ti3+defects and oxygen vacancies, was confirmed. These structural features enhance the light absorption and mitigate undesired recombination of photogenerated charge carriers. These results would trigger farther investigation of defect engineering towards enhancement of the efficiency of metal oxide photocatalysts.

Published
2024
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15. Photocatalytic hydrogen generation from a methanol–water mixture in the presence of g-C3N4 and graphene/g-C3N4.

Author

Touati, Wassila, Karmaoui, Mohamed, Bekka, Ahmed, Edelmannová, Miroslava Filip, Furgeaud, Clarisse, Chakib, Alaoui, Allah, Imene kadi, Figueiredo, Bruno, Labrincha, J. A., Arenal, Raul, Koci, Kamila, and Tobaldi, David Maria

Subjects
*INTERSTITIAL hydrogen generation, *BAND gaps, *CHEMICAL stability, *PHOTOCATALYSTS, *CARBON monoxide
Abstract

Graphitic carbon nitride (g-C3N4), possessing high thermal and chemical stability, non-toxicity, facile synthesis, and low band gap energy is a promising candidate for photocatalytic applications. In this study, bulk and exfoliated g-C3N4 were synthesised from different precursors (melamine and urea). Moreover, the surface of bulk g-C3N4 and exfoliated g-C3N4 was modified with graphene (0.5 wt% and 1 wt%) aiming to obtain a prolonged carrier lifetime. The effect of g-C3N4 synthesis from various precursors and the influence of graphene content on the photocatalytic activity during the degradation of a water–methanol mixture under UVC irradiation were examined, in comparison to commercial P25. Hydrogen, methane and carbon monoxide were the decomposition products; hydrogen was the main product of decomposition, whereas CH4 and CO resulting from the reduction of CO2 were generated in a significantly smaller amount. All the produced photocatalysts, whether pure or modified with graphene, exhibited higher activity than the commercial photocatalyst P25. [ABSTRACT FROM AUTHOR]

Published
2022
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