| Texto completo | |
| Autor(es): |
Rodrigues, Barbara S.
;
Almeida, Vinicius A.
;
Claudino, Caroline H.
;
Ponce-de-Leon, Carlos
;
Bavykin, Dmitry V.
;
Souza, Juliana S.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF NANOSTRUCTURE IN CHEMISTRY; v. 10, n. 4, p. 14-pg., 2020-10-07. |
| Resumo | |
A hybrid organic-inorganic catalyst of polyheptazine and TiO2 nanotubes was obtained by polymerization of polyheptazine directly on the surface of layered titanate nanotubes (TiNT) at 400 degrees C; leading to a phase transition from TiNT to TiO2 anatase. This method induces the polymerization in-between the layers of TiNTs, in contrast to what happens on commercial TiO2 nanoparticles (P25), for which polymer adsorption occurs only onto the outer surface. As a result, the hybrid materials exhibit enhanced physical-chemical properties, resulting in improved photocatalytic response; the methylene blue degradation was 1.28-times higher using the hybrid polyheptazine-TiO2 nanotubes as a photocatalyst, in comparison to the use of polyheptazine-P25. Besides, polyheptazine-TiO(2)nanotubes show higher photo-electrocatalytic activity than TiNTs, whereas polyheptazine-P25 exhibits lower activity than P25. The lower band-gap energies, zeta potentials and higher surface area make the polyheptazine-TiO2 nanotubes more efficient photocatalysts under visible light in comparison to P25-based nanoparticles. [GRAPHICS] . (AU) | |
| Processo FAPESP: | 19/26010-9 - Dispositivos fotoativos baseados em heterojunções de vanadato de bismuto e óxido de tungstênio sobre grafeno |
| Beneficiário: | Bárbara Scola Rodrigues |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 17/11395-7 - Síntese assistida por micro-ondas de heterojunções de óxidos metálicos semicondutores com aplicações fotocatalíticas |
| Beneficiário: | Juliana dos Santos de Souza Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |