Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction

The introduction of toxic chemicals into the environment can result in water pollution leading to degradation biodiversity as well human health. This study presents a new approach using metal oxides (Al2O3 and SiO2) modified with plasmonic (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared Al2O3 SiO2 NFs different concentrations (0.2 2.0 weight %) by ultrasonic-assisted dispersion NPs base fluid. thermo-physical (viscosity, activation energy, thermal conductivity), electrical (AC conductivity dielectric constant) physical (ultrasonic velocity, density, refractive index) stability characteristics were comparatively evaluated. then catalytically activated loading silver obtain Al2O3/SiO2@Ag composite NPs. catalytic reduction 4-nitrophenol (4-NP) based was followed. efficiency Al2O3@Ag NF SiO2@Ag NF, 4-NP catalysis, is compared. Based on rate constant evaluation, found be superior 2% (92.9 × 10?3 s?1) compared (29.3 s?1). Importantly, enhanced removal much higher than other catalysts reported literature, signifying importance formulation-based catalysis.