Open AccessGreen Mediated Synthesis of Macroporous Hierarchical CeO2 Nanoparticles using Mimosa pudica Leaf Extract for Humidity Sensing Application
Author(s) -
Narasimha Kulkarni,
M.C. Navindagi,
M. V. S. Murali Krishna,
Shashikant Kushnoore
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23190
Subject(s) - nanoparticle , mimosa pudica , cerium oxide , humidity , relative humidity , chemistry , cerium , scanning electron microscope , nanotechnology , chemical engineering , oxide , nuclear chemistry , materials science , botany , inorganic chemistry , organic chemistry , composite material , thermodynamics , physics , engineering , biology
Metal oxide nanoparticles are popular candidates for chemiresistive sensors application. Cerium oxide(CeO2) based semiconducting gas sensors have gained rapid interest in recent years. In this study, anenvironment-friendly green synthesis approach was employed for the synthesis of macroporous CeO2nanoparticles using Mimosa pudica leaf extract. Later the performance of CeO2 nanoparticles forhumidity sensor is demonstrated. X-ray diffraction studies revealed the cubic fluorite crystal structurewith no impurities, scanning electron microscopy analysis revealed the macroporous morphology ofCeO2 hierarchical nanoparticles. Humidity sensing properties were studied using interdigitated electrodecoated with CeO2 nanoparticles. The results showed the sensing response of 0.5 times for 10% RH(relative humidity) and seven times for 90% RH. The response and recovery times were found to be aslow as 12 s and 15 s, respectively. The experimental results provided an environment-friendly approachfor the synthesis of CeO2 particles and revealed promising results in humidity sensing application.