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New Electrospun ZnO:MoO(3) Nanostructures: Preparation, Characterization and Photocatalytic Performance

New molybdenum trioxide-incorporated ZnO materials were prepared through the electrospinning method and then calcination at 500 °C, for 2 h. The obtained electrospun ZnO:MoO(3) hybrid materials were characterized by X-ray diffraction, scanning and transmission electron microscopies, ultraviolet (UV)...

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Detalles Bibliográficos
Autores principales: Pascariu, Petronela, Homocianu, Mihaela, Olaru, Niculae, Airinei, Anton, Ionescu, Octavian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7466607/
https://www.ncbi.nlm.nih.gov/pubmed/32731528
http://dx.doi.org/10.3390/nano10081476
Descripción
Sumario:New molybdenum trioxide-incorporated ZnO materials were prepared through the electrospinning method and then calcination at 500 °C, for 2 h. The obtained electrospun ZnO:MoO(3) hybrid materials were characterized by X-ray diffraction, scanning and transmission electron microscopies, ultraviolet (UV)-diffuse reflectance, UV–visible (UV–vis) absorption, and photoluminescence techniques. It was observed that the presence of MoO(3) as loading material in pure ZnO matrix induces a small blue shift in the absorption band maxima (from 382 to 371 nm) and the emission peaks are shifted to shorter wavelengths, as compared to pure ZnO. Also, a slight decrease in the optical band gap energy of ZnO:MoO(3) was registered after MoO3 incorporation. The photocatalytic performance of pure ZnO and ZnO:MoO(3) was assessed in the degradation of rhodamine B (RhB) dye with an initial concentration of 5 mg/L, under visible light irradiation. A doubling of the degradation efficiency of the ZnO:MoO(3) sample (3.26% of the atomic molar ratio of Mo/Zn) as compared to pure ZnO was obtained. The values of the reaction rate constants were found to be 0.0480 h(−1) for ZnO, and 0.1072 h(−1) for ZnO:MoO(3), respectively.