A Factorial Design Approach for Hydrothermal Synthesis of Phase-Pure AgInO 2 : A Parametric Optimization Study

• Published in: Angewandte Chemie International Edition Vol. 59; no. 6; pp. 2241 - 2245
• Main Authors: Beatriceveena, T V, Sree Rama Murthy, A, Murugesan, S, Prabhu, E, Gnanasekar, K I
• Format: Journal Article
• Language: English
• Published: Germany 03-02-2020
• Subjects: factorial design; hydrothermal synthesis; delafossite oxides; layered materials
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.201911350

Owing to a wide range of industrial applications and fundamental importance, delafossite compounds have gathered tremendous interest in research community. In this study, the formation of hexagonal nanoplates of AgInO
mainly dominated by (00l) facets with no metallic Ag impurity, reported using a facile hydrothermal route at 180 °C using KOH as mineralizer by adopting a factorial design approach. Rietveld analysis of the powder XRD pattern and SAED confirms the rhombohedral system of AgInO
. FE-SEM image shows a uniform hexagonal plate-like morphology with an average width of about 300 nm and thickness of 70 nm. XPS and EDX analysis confirm potassium ion free AgInO
. A specific surface area of about 48.5 m
 g
is arrived from N
adsorption studies. Temperature-dependent AC impedance measurements revealed an activation energy of 0.24 eV/f.u. Further, TG-DTA studies found that the compound is stable in air up to 595 °C.