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| Pàgina inicial > Articles > Articles publicats > Enhanced Gas-Phase pollutant removal using Pt nanoparticle-modified exfoliated carbon nitride photocatalysts under UV and visible light |
| Data: | 2024 |
| Descripció: | 11 pàg. |
| Resum: | Platinum nanoparticles (Pt NPs) have been prepared by the organometallic approach on the surface of exfoliated graphitic carbon nitride (exf-g-CN) with different metal loadings. Multi-technique characterization shows a good dispersion of Pt NPs on the surface of exf-g-CN with a narrow size distribution between 1. 7-2. 2 nm and a BET area of about 120 m2/g. The Pt NPs are mainly composed of platinum metal with a minor contribution of oxidic surface species. The effect of UV-A and Vis light of different wavelengths on the photocatalytic performance is investigated. The as-prepared hybrid materials show excellent photocatalytic activity for the decontamination of air from volatile organic compounds (VOCs, in particular trichloroethylene, C2HCl3) under low power visible light irradiation. The conversion value reaches a maximum close to 85 % at 405 nm Vis light for 0. 5 wt. % Pt loading. At this level of Pt content, electron and hole recombination rates are suppressed according to photoluminescence analysis. Photonic efficiencies of around 0. 3 % were achieved under Vis light. The optimised material shows high stability from 2,500 min of operation. XPS analysis suggests the crucial role of Pt/Pt2+ and chlorine species detected on used samples in the reaction rate and stability of the material. |
| Ajuts: | Agencia Estatal de Investigación PID2022-138682OB-I00 Agencia Estatal de Investigación PID2019-104171RB-I00 Agencia Estatal de Investigación PID2023-146787OB-I00 Ministerio de Ciencia e Innovación TED2021-129237B-I00 |
| Nota: | Altres ajuts: acords transformatius de la UAB |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | CN ; Photocatalytic air treatment ; Pt nanoparticles ; UV-A and Vis light ; VOCs |
| Publicat a: | Chemical engineering journal (1996), Vol. 500 (November 2024) , art. 156948, ISSN 1873-3212 |
11 p, 6.4 MB |