CeO2 Nanoparticle Morphologies and Their Corresponding Crystalline Planes for the Photocatalytic Degradation of Organic Pollutants

Autor(es)

Amoresi, Rafael A. C. ^[1] ; Oliveira, Regiane C. ^{[2, 1]} ; Marana, Naiara L. ^[2] ; de Almeida, Priscila B. ^[3] ; Prata, Paloma S. ^[4] ; Zaghete, Maria A. ^[5] ; Longo, Elson ^[3] ; Sambrano, Julio R. ^[2] ; Simoes, Alexandre Z. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Modeling & Mol Simulat Grp, BR-17033360 Bauru, SP - Brazil

^[3] Univ Fed Sao Carlos, UFSCar, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Fed Sao Carlos, UFSCar, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[5] Sao Paulo State Univ, UNESP, Inst Chem, LIEC, BR-14800060 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 2, n. 10, p. 6513-6526, OCT 2019.
• Citações Web of Science: 0

Resumo

Currently, numerous properties of semiconducting oxides are correlated to their morphological characteristics resulting from their exposed surfaces. In the present work, the relationship between the following morphologies rod, bean, hexagon, and rod/cube of CeO2 with the exposure of (111), (110), (100), and (311) surfaces and the main charge carriers generated by the photochemical processes was investigated. This was done in regard to the degradation of ciprofloxacin and rhodamine-B. The initial stages of the degradation of the two types of molecules were evaluated, allowing the determination of where the charge carriers generated in the semiconductor preferentially acted on the molecules. Therefore, the active species in each photocatalyst were identified by scavenger tests and correlated to the computational simulations using the density functional theory. Accordingly, the relationships between the morphology, surface exposure in the particles, surface defects, photochemically generated species, and preferential attack on the micropollutant molecule were shown. Specific surface area analyses demonstrate an effective relationship between photocatalytic activity and the exposed surface of the particle. This will allow rationalization of the relation between the catalytic and electronic properties of semiconductor surfaces. (AU)

• Processo FAPESP: 19/09296-6 - Irradiação por laser femtosegundo em amostras de CeO2 e avanços na abordagem teórica
• Beneficiário: Rafael Aparecido Ciola Amoresi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 16/07476-9 - Nanotubos porosos de carbono e de semicondutores inorgânicos: uma abordagem computacional
• Beneficiário: Julio Ricardo Sambrano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/19143-7 - Uma abordagem teórico-experimental dos mecanismos de condução e defeitos de interface em heteroestruturas sensoras baseados em semicondutores P-N e N-N a partir de matrizes de CeO2
• Beneficiário: Rafael Aparecido Ciola Amoresi
• 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
• Processo FAPESP: 16/25500-4 - Funcionalização de nanotubos semicondutores via interface e adsorção de gases: uma abordagem computacional
• Beneficiário: Naiara Letícia Marana
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado