Nucleation front instability in two-dimensional (2D) nanosheet gadolinium-doped cerium oxide (CGO) formation

Autor(es)

Marani, Debora ^{[1, 2]} ; Reis Moraes, Leticia Poras ^[3] ; Gualandris, Fabrizio ^[1] ; Sanna, Simone ^[1] ; de Florio, Daniel Zanetti ^[2] ; Esposito, Vincenzo ^[1] ; Fonseca, Fabio Coral ^[3]

Afiliação do(s) autor(es)

^[1] Tech Univ Denmark DTU, Dept Energy Convers & Storage, Frederiksborgvej 399, DK-4000 Roskilde - Denmark

^[2] Univ Fed ABC, Ctr Engn Modelagem & Ciencias Sociais Aplicadas, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[3] Nucl & Energy Res Inst IPEN, CNEN SP, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CrystEngComm; v. 20, n. 10, p. 1405-1410, MAR 14 2018.
• Citações Web of Science: 1

Resumo

Herein we report for the first time the synthesis of ceramic-organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce1-XGdXO2-delta,CGO) and its exfoliation into two-dimensional (2D) nano-sheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10-80 degrees C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 degrees C) morphological transition from nanoparticles (1D) to two-dimensional (2D) nanosheets is observed and associated with a low thermal energy transition of ca. 2.6 kJ mol(-1). For the 3D-layered material, exfoliation experiments are conducted in water/ethanol solutions. Systems at volume fractions ranging from 0.15 to 0.35 are demonstrated to promote under ultrasonic treatment the delamination into 2D nanosheets. (AU)

• Processo FAPESP: 15/20434-0 - Desenvolvimento de tintas cerâmicas baseadas em nanofolhas para impressão jato de tinta de camadas ultrafinas de componentes de células de óxidos sólidos (SOCs)
• Beneficiário: Fabio Coral Fonseca
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 14/09087-4 - Estudos sobre o uso do bioetanol em células a combustível do tipo PEMFC e SOFC
• Beneficiário: Marcelo Linardi
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia