A novel route to obtain TiO2 nanoparticles using green synthesis with vanillin and Bougainvillea glabra Choisy extract
| Autor: | Jesús Eduardo Castellanos-Águila, Maria C. García-Castañeda, Rosalba Fuentes-Ramírez, Georfrey Humberto Israel Maury-Cuna, Víctor Martín Escalante-Gómez, Mónica Araceli Olea-Amezcua |
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| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science Absorption spectroscopy biology Band gap Materials Science (miscellaneous) Infrared spectroscopy Nanoparticle Nanochemistry 02 engineering and technology Cell Biology 010402 general chemistry 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Physical chemistry Crystallite Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Bougainvillea glabra Biotechnology |
| Zdroj: | Applied Nanoscience. 11:887-894 |
| ISSN: | 2190-5517 2190-5509 |
| DOI: | 10.1007/s13204-020-01648-9 |
| Popis: | In this work, we present two green routes, as an alternative method to traditional synthesis, to obtain TiO2 nanoparticles (NPs) from vanillin (TiO2_V) and Bougainvillea glabra Choisy flower extracts (TiO2_B) as suitable non-toxic reducing agents due to their potential to reduce their environmental impact and cost during the synthesis process. The NPs presented an anatase phase as confirmed by X-ray diffraction, and with crystallite sizes of 6.10 nm (TiO2_V) and 5.89 nm (TiO2_B), their hydrodynamic size and morphology were characterized by dynamic light scattering and scanning electron microscopy, respectively. Infrared spectroscopy confirmed TiO2 characteristic bands for the obtained materials and from their UV–Vis absorption spectra band gap values of 3.07 and 3.08 eV for TiO2_V and TiO2_B, respectively, were calculated. Additionally, Gratzel cells were prepared to investigate the efficiency of the NPs obtained by this green synthesis. Finally, we included a theoretical section where, from ab initio calculations of structural and electronic properties, we explain the role of the reducing agents of the employed experimental synthesis, finding that the radicals restrict the grown-up of the clusters by the passivation of the dangling bonds modifying the crystal structure of the clusters splitting the t2g orbitals, altering the band gap of the clusters. |
| Databáze: | OpenAIRE |
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