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

被引：6

作者：

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
]}

机构：

[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

来源：

CRYSTENGCOMM | 2018年 / 20卷 / 10期

基金：

巴西圣保罗研究基金会;

关键词：

LAYERED DOUBLE HYDROXIDES; PROTON-EXCHANGE MEMBRANES; NANOMATERIALS; DESIGN; EXFOLIATION; CATALYSTS; CRYSTALS; LIQUID;

D O I：

10.1039/c7ce01737e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1405 / 1410

页数：6

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