| Texto completo | |
| Autor(es): |
Corradini, Patricia Gon
;
de Brito, Juliana Ferreira
;
Boldrin Zanoni, Maria Valnice
;
Mascaro, Lucia Helena
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF CO2 UTILIZATION; v. 36, p. 9-pg., 2020-02-01. |
| Resumo | |
The high levels of atmospheric CO2 transformed this compound in a preoccupant pollutant. However, a wide range of semiconductors, including bismuth vanadate (BiVO4), can be applied for CO2 reduction aiming generation of fuels. This work reports the optimization of the BiVO4 layer synthesis by microwave system using factorial experimental design, where the variables time (5 to 15 min) and temperature (120 to 160 degrees C) were studied. For evaluation purposes, the materials synthesized were applied in photocatalytic reduction of CO2. All the BiVO4 materials analyzed promoted the formation of methanol. The best condition was obtained under the material synthesized at 160 degrees C with 15 min of reaction, where 1.5 mmol L-1 g(cat)(-1) of methanol was produced after 120 min of photocatalysis. For the first time, acetone formation was observed in this kind of material. The best condition for acetone production was acquire with the material prepared at 140 degrees C with 10 min of synthesis, where 0.030 mmol L-1 g(cat)(-1) was generated after 240 min of CO2 reduction. Differences in methanol concentration obtained among the samples were probably related to crystallographic patterns of the material, once the presence of Bi2O3 or other BiVO4 crystallographic species may affect the efficiency of the material. The results obtained in this work show that the use of BiVO4 layer semiconductor prepared by microwave system for CO2 reduction leads to the generation of high amounts of methanol under just UV-vis light incidence, aside from promoting the production of acetone. (AU) | |
| Processo FAPESP: | 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock |
| Beneficiário: | Arlene Gonçalves Corrêa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |
| Processo FAPESP: | 18/16401-8 - Fotocatalisadores e fotoeletrodos para obtenção de combustíveis renováveis |
| Beneficiário: | Lucia Helena Mascaro Sales |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/02950-0 - Redução fotoeletrocatalítica de N2 a NH3 em reator fotoeletroquímico com fotoânodo direcionador de elétrons de Nb2O5/Pt e cátodo de GDL decorado com Fe, Co e Sb2Se3 |
| Beneficiário: | Juliana Ferreira de Brito |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |