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

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: CrystEngComm; v. 20, n. 10, p. 1405-1410, MAR 14 2018.
• Web of Science Citations: 1

Abstract

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)

• FAPESP's process: 15/20434-0 - Development of ceramic nanosheets-based inks for inkjet printing of ultra-thin films for solid oxide cells (SOCs) components
• Grantee: Fabio Coral Fonseca
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• FAPESP's process: 14/09087-4 - Studies on the use of bioethanol in proton exchange membrane and solid oxide fuel cells
• Grantee: Marcelo Linardi
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program