Effect of hydrothermal temperature on the antibacterial and photocatalytic activity of WO3 decorated with silver nanoparticles

• Autor(a) principal: Capeli, R. A. [UNESP]
• Data de Publicação: 2021
• Outros Autores: Belmonte, T., Caierão, J., Dalmaschio, C. J., Teixeira, S. R. [UNESP], Mastelaro, V. R., Chiquito, A. J., Teodoro, M. D., Domenegueti, J. F.M., Longo, E., Trindade, L. G. [UNESP], Pontes, F. M. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1007/s10971-020-05433-6; http://hdl.handle.net/11449/205484
• topic: Ag nanoparticles; Antibacterial; Hydrothermal; Photocatalysis; WO3

We studied the catalytic and antimicrobial properties of hierarchical architecture of WO3.Ag synthesized at 100, 150, and 200 °C by a very simple and reliable hydrothermal technique. The investigation carried out by XRD showed the amorphous nature of sample grown at 100 °C, while those at 150 and 200 °C crystalline nature of 3D WO3.Ag was confirmed. From FESEM and HRTEM results, it was evident that the silver nanoparticles grew in a 3D WO3.Ag host matrix. The average diameter of Ag nanoparticles by HRTEM was around 5–15 nm. Photocatalytic activities of as-prepared samples were evaluated by the degradation of rhodamine B (RhB). Samples prepared at 150 and 200 °C showed higher activity in comparison to sample prepared at 100 °C. This can be mainly attributed to the suppression of traps states and electron/hole pairs recombination as highlighted by the photoluminescence results. The as-synthetized samples showed promising antimicrobial features against various bacterial strains. The 100 °C WO3.Ag nanospheres exhibited the highest antibacterial activity, with very low minimum inibitory concentration (MIC) values (4.0–8.0 μg/ml) when compared with 150 and 200 °C samples. [Figure not available: see fulltext.]