Green synthesis silver nanoparticles Bougainvillea glabra Choisy/LED light with high catalytic activity in the removal of methylene blue aqueous solution |
| |
Authors: | Filho Augusto Cezar Dotta de Jesus Soares Jefferson Carriço Murilo Ricardo Sigal Viçozi Gabriel Pedroso Flores Wladimir Hernandez Denardin Cristiane Casagrande Roehrs Rafael Denardin Elton Luís Gasparotto |
| |
Institution: | 1.Laboratório de Estudos Físico-Químicos E Produtos Naturais (LEFQPN), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil ;2.Laboratório de Análises Químicas Ambientais E Toxicológicas (LAQAT), Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil ;3.Universidade Federal Do Pampa, Campus Uruguaiana, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil ;4.Campus Bagé, Universidade Federal Do Pampa, Bagé, RS, CEP 96413-172, Brazil ;5.Grupo de Pesquisa Em Bioquímica E Toxicologia Em Compostos Bioativos, Campus Uruguaiana, Universidade Federal Do Pampa, P. Box: 118, Uruguaiana, RS, CEP 97500-970, Brazil ; |
| |
Abstract: | In this study, we evaluated, in a pioneering way, the influence of wavelengths from the decomposition of white light on the production and physicochemical properties of silver nanoparticles (AgNPs). Bearing in mind a process of green synthesis, an extract of the bracts of Bougainvillea glabra Choisy (BgC) was used, a species native to tropical and subtropical regions and frequently used in ornamentation, possessing in its photochemical composition, biomolecules capable of acting as reducing agents for convert Ag+ to Ag0. We used light-emitting diodes (LED) to obtain the desired wavelengths (violet, blue, green, yellow, orange, and red) in the test called rainbow, and we evaluated the obtaining of AgNPs compared to white LED light, nature, and absence of light. In the rainbow assay, we obtained a gradual increase in the intensity of the plasmonic band resonance from the red wavelength (0.124?±?0.067 a.u.) to violet (0.680?±?0.199 a.u.), indicating a higher reaction yield in obtaining AgNPs. Smaller hydrodynamic sizes (approximately 150 nm) at more energetic wavelengths (violet, blue, and green) about less energetic wavelengths (yellow, orange, and red) (approximately 400 nm) were obtained. Analysis by SEM microscopy, FTIR spectroscopy, and X-ray diffraction indicates the presence of silver nanoparticles in all LED colors used together with white LED light and Laboratory light (natural light). Due to the high environmental demand to remove pollutants from water sources, including textile dyes, we applied AgNPs/BgC to remove methylene blue (MB) dye from an aqueous solution. A minimum removal percentage greater than 65%, with emphasis on formulations synthesized by the colors of violet LED (84.27?±?2.65%) and orange LED (85.91?±?1.95%), was obtained.
|
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|