Synthesis and characterisation of precipitated CuO · SiO₂ oxide composites

Abstract

PurposeThe purpose of this paper is to propose a new method of synthesis of CuO · SiO2 oxide composite based on the reaction of precipitation from water solutions of sodium silicate and copper nitrate.Design/methodology/approachSolutions of sodium silicate and copper nitrate were used as substrates. The effects of direction of substrate supply, concentration, excess of reagents and temperature of precipitation on the physicochemical properties of the products were analysed.FindingsA new method of synthesis of CuO · SiO2 oxide composite based on a precipitation reaction is proposed.Research limitations/implicationsOnly sodium silicate and copper nitrate solutions were used.Practical implicationsThe CuO · SiO2 oxide composite obtained can be used as blue pigment or polymer filler.Originality/valueThe paper determines optimum conditions of CuO · SiO2 oxide composite precipitation to obtain products with desired physicochemical, dispersive and structural properties.

PLA and PP Composite Nonwoven with Antimicrobial Activity for Filtration Applications

“…The following chemical reagents were applied: liquid paraffin (purchased in PPH Aflopa), copper (II) oxide/silicon dioxide composite (CuO⋅SiO 2 , composite granulation 460 nm, provided by Institute of Chemical Technology and Engineering, Poznań University of Technology, Poland [16]), tetraborate buffer (pH = 10, Na 2 B 4 O 7 0.130 mol/dm 3 + NaOH 0.060 mol/dm 3 ), and phosphate buffer (pH = 7, KH 2 PO 4 0.071 mol/dm 3 + K 2 HPO 4 0.117 mol/dm 3 ).…”

Research on the Influence of the Type of Surfactant and Concentrator in Aqueous Dispersion of Pigments

“…This means that dispersion systems are basically unstable and the processes of aggregation of the dispersed phase particles occur sooner or later, followed by their sedimentation following the formation of sediment. One of the methods of experimental definition of the phenomena occurring in the dispersion system are observations and sedimentation tests [10][11][12][13][14][15][16].…”