CsPbBr3 nanocrystals supported on a partially oxidized Ti2N MXene for photothermal CO2 conversion
[EN] The development of new photo-thermal catalysts for the transformation of CO2 into fuels is of great interest, offering a clean and sustainable approach to reducing the carbon footprint. Herein, we present a novel hybrid material composed of a nanocrystalline metal halide perovskite (CsPbBr3) su...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:dnet:riunet______::57baf16d450b9ea7d9eb9ae2883663bc |
| Acceso en línea: | https://riunet.upv.es/handle/10251/233375 |
| Access Level: | acceso abierto |
| Palabra clave: | Photothermal CO2 conversion CsPbBr3 perovskite MXene Ti2N TiO2 interfacial layer Charge separation Methane production |
| Sumario: | [EN] The development of new photo-thermal catalysts for the transformation of CO2 into fuels is of great interest, offering a clean and sustainable approach to reducing the carbon footprint. Herein, we present a novel hybrid material composed of a nanocrystalline metal halide perovskite (CsPbBr3) supported on a two-dimensional titanium nitride (Ti2N) MXene. Additionally, we demonstrate the importance of forming an external TiO2 layer through partial oxidation of the MXene (POM-Ti2N), which introduces catalytic centers and enhances photogenerated charge separation. Remarkable activity in the formation of CH4 and CO was observed, with yields of 321 mu mol g-1 and 480 mu mol g-1, respectively. The selectivity of the reaction was found to be temperature dependent. The mechanism was thoroughly investigated using XPS and photoluminescence studies. XPS analysis revealed a significant chemical interaction between the CsPbBr3 nanocrystals and the POM-Ti2N MXene after the formation of the composite. Photoluminescence measurements revealed a considerably shorter emission lifetime for the hybrid catalyst (tau ave = 1.73 ns) compared to that of the CsPbBr3 nanoparticles (tau ave = 25.32 ns), indicating strong interaction with the MXene. Furthermore, this research highlights the potential of combining metal halide perovskites with MXenes and the importance of controlling their interface for photo-thermal reactions. |
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