Influence of Organic Solvent on Solvothermal Synthesis of Samaria and Gadolinia Doped Ceria – Nickel Oxide Composites

Abstract

The synthesis and ceramic processing of samaria and gadolinia doped ceria - nickel oxide composites, mainly applied as Solid Oxide Fuel Cell anodes, were studied in this work. Powders with composition Ce0.8(SmGd)0.2O1,9/NiO and mass ratio of 40/60%, were synthesized by hydroxide coprecipitation with CTAB surfactant, followed by solvothermal treatment in n-butanol, ethanol and n-propanol at 150 °C for 16 hours, calcination at 600°C for 1 hour and milling. Sintering of compacted samples was performed at 1300°C for 1 hour. The powders were analyzed by X-ray diffraction, scanning electron microscopy, nitrogen adsorption method (BET), laser beam scattering (Cilas) and TG/DTA. The ceramics were analyzed by scanning electron microscopy, EDS, XRD and density measurements by Archimedes method. The results showed that the powders have a high specific surface area (42 - 85 m2/g). The ceramic characterizations showed a high chemical homogeneity and density value of 99% TD for powders treated with ethanol and propanol.

Cerium-Oxide-Nanoparticle-Decorated Zinc Oxide with Enhanced Photocatalytic Degradation of Methyl Orange

“…89-13971) [12], while as-synthesized Ce/ZnO samples show additional peaks corresponding to the reflection planes of the cubic-structured CeO 2 (JCPDS No. 34-394) [38]. The lattice constants of ZnO and CeO 2 crystals can be calculated from the X-ray diffraction (XRD) results using a space lattice equation [7,39]:…”

A review on the preparation of anode materials and anode films for solid oxide fuel cell applications

“…153 A previous study applied solvothermal treatment to synthesize gadolinia and samaria-doped ceria, which is a nickel oxide composite anode material. 154 The sample was solvothermally treated at 150 C for 16 h in butanol, ethanol, or propanol. The results showed that the samples were homogenous.…”

“…Solvothermal method is a green process that has many advantages, such as an environmental‐friendly closed system, low synthesis temperature, high‐purity products, easily controllable morphology and crystal size, and low precipitant requirements 153 . A previous study applied solvothermal treatment to synthesize gadolinia and samaria‐doped ceria, which is a nickel oxide composite anode material 154 . The sample was solvothermally treated at 150°C for 16 h in butanol, ethanol, or propanol.…”