Catalytic Properties of Silver Nanoparticles Supported on Silica Spheres

Abstract

In this work, we investigate the catalytic properties of silver nanoparticles supported on silica spheres. The technique to support silver particles on silica spheres effectively avoids flocculation of nanosized colloidal metal particles during a catalytic process in the solution, which allows one to carry out the successful catalytic reduction of dyes. The effects of electrolytes and surfactants on the catalytic properties of silver particles on silica have been investigated. It is found that the presence of surfactants depresses the catalytic activity of the silver particles to some extent by inhibiting the adsorption of reactants onto the surface of the particles. Electrolytes either increase the migration rate of reactants in the solution resulting in an increase in the catalytic reaction rate or inhibit the adsorption of reactants onto the surface of the silver particles leading to a loss in the activity of the metal particles.

Green Synthesis and Characterization of Silver Nanoparticles from Crocus Mathewii; A Disremembered Turkish Flowering Plant

“…Ag, Pt, Au and Pd), silver (Ag) is the metal of abundance for prospective applications in the field of biological systems, living organisms and medicine. Due to their elite properties, AgNPs appear to have quite a lot of applications, such as catalysts in chemical reactions [14,15] , electrical batteries and in spectrally discriminative coatings for absorption of solar energy [16,17] as optical elements, pharmaceutics and in chemical sensing and biosensing [18][19][20] .…”

A novel approach for the biosynthesis of silver oxide nanoparticles using aqueous leaf extract ofCallistemon lanceolatus(Myrtaceae) and their therapeutic potential

“…It is also known to catalyse reactions involving the oxidation of ethylene and methanol. [26,27] Silver oxide nanoparticles exhibit good fluorescence [4] and optical properties, [5] and have the potential to be used in data storage devices of the future. Their property of optical fluorescence memory facilitates their usage in optical media to enhance the readout signal by efficient utilisation of laser energy.…”

Applications of nanomaterials in liquid chromatography: Opportunities for separation with high efficiency and selectivity

“…Previous studies have also demonstrated their potential applications in LC as mentioned above. Recently, synthesis of nanometer-sized core-shell structures consisting of silica core and precious metal shell (e. g., Au, Pt, Ag) as well as precious metal core and silica shell has become an increasingly important topic [53][54][55][56][57][58][59][60][61]. The precious metal nanoparticles are of several nanometers in diameter in the resulting core-shell composites of several hundred nanometers in size.…”