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A Factorial Design Approach for Hydrothermal Synthesis of Phase‐Pure AgInO 2 : A Parametric Optimization Study
Author(s) -
Beatriceveena T. V.,
Sree Rama Murthy A.,
Murugesan S.,
Prabhu E.,
Gnanasekar K. I.
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201911350
Subject(s) - delafossite , rietveld refinement , hydrothermal circulation , factorial experiment , selected area diffraction , materials science , hydrothermal synthesis , x ray photoelectron spectroscopy , phase (matter) , analytical chemistry (journal) , hexagonal phase , impurity , hexagonal crystal system , mineralogy , crystallography , chemical engineering , nanotechnology , chemistry , crystal structure , metallurgy , transmission electron microscopy , statistics , mathematics , organic chemistry , chromatography , engineering , oxide
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 2 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 2 . 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 2 . A specific surface area of about 48.5 m 2 g −1 is arrived from N 2 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.