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

Debora Marani; Leticia Poras Reis  Moraes; Fabrizio Gualandris; Simone Sanna; Daniel Zanetti De Florio; Vincenzo Esposito; Fabio Coral  Fonseca

doi:10.1039/c7ce01737e

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

Debora Marani^*, Leticia Poras Reis Moraes, Fabrizio Gualandris, Simone Sanna, Daniel Zanetti De Florio, Vincenzo Esposito, Fabio Coral Fonseca

^*Corresponding author for this work

Department of Energy Conversion and Storage

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Abstract

Herein we report for the first time the synthesis of ceramic–organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce_1−XGd_XO_2−δ, CGO) and its exfoliation into two-dimensional (2D) nanosheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10–80 °C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 °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.

Original language	English
Journal	CrystEngComm
Volume	20
Issue number	10
Pages (from-to)	1405-1410
ISSN	1466-8033
DOIs	https://doi.org/10.1039/c7ce01737e
Publication status	Published - 2018

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

abstract = "Herein we report for the first time the synthesis of ceramic–organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce1−XGdXO2−δ, CGO) and its exfoliation into two-dimensional (2D) nanosheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10–80 °C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 °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.",

author = "Debora Marani and Moraes, {Leticia Poras Reis} and Fabrizio Gualandris and Simone Sanna and {Zanetti De Florio}, Daniel and Vincenzo Esposito and Fonseca, {Fabio Coral}",

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T1 - Nucleation front instability in two-dimensional (2D) nanosheet gadolinium-doped cerium oxide (CGO) formation

AU - Marani, Debora

AU - Moraes, Leticia Poras Reis

AU - Gualandris, Fabrizio

AU - Sanna, Simone

AU - Zanetti De Florio, Daniel

AU - Esposito, Vincenzo

AU - Fonseca, Fabio Coral

PY - 2018

Y1 - 2018

N2 - Herein we report for the first time the synthesis of ceramic–organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce1−XGdXO2−δ, CGO) and its exfoliation into two-dimensional (2D) nanosheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10–80 °C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 °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.

AB - Herein we report for the first time the synthesis of ceramic–organic three-dimensional (3D) layered gadolinium-doped cerium oxide (Ce1−XGdXO2−δ, CGO) and its exfoliation into two-dimensional (2D) nanosheets. We adopt a water-based synthetic route via a homogenous precipitation approach at low temperatures (10–80 °C). The reaction conditions are tuned to investigate the effects of thermal energy on the final morphology. A low temperature (40 °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.

U2 - 10.1039/c7ce01737e

DO - 10.1039/c7ce01737e

M3 - Journal article

SN - 1466-8033

VL - 20

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EP - 1410

JO - CrystEngComm

JF - CrystEngComm

IS - 10

ER -

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

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