A method of forming a zinc oxide/borate nanocomposite that includes mixing a borate solution including boric acid in a polar solvent, and a zinc solution including a zinc carboxylate complex including a zinc ion and a coordinated carboxylate ligand to form a precursor mixture. Further, a polyol is added to the precursor mixture to form a reaction mixture, followed by heating the reaction mixture to 100 to 150° C. to form a solid intermediate product and calcination the solid intermediate product at 500 to 800° C. to form the zinc oxide/borate nanocomposite. The nanocomposite includes Zn3(BO3)2 and ZnO [1].
A particulate mesoporous nanocomposite having the general formula ZrO2·Mg6MnO8, wherein the nanocomposite comprises a monoclinic zirconium dioxide (ZrO2) crystalline phase, a tetragonal ZrO2 crystalline phase, and a cubic magnesium manganese oxide (Mg6MnO8) crystalline phase. The nanocomposite may be obtained by a method comprising: forming an aqueous mixture by adding an aqueous solution of a chelating agent into an aqueous solution of a magnesium salt, a manganese salt and a zirconium salt; adding a polyol in the aqueous mixture to form a gel; heating the gel under stirring at a temperature of about 200° C. to about 400° C. for a sufficient duration to form a dry powder; and, calcining the dry powder at a temperature of about 700° C. to about 1000° C. to form the nanocomposite material [2].
A geopolymer composite including a porous aluminosilicate material, a quaternary ammonium surfactant, and a hydrophobicity modifier that includes dibenzoylmethane. The quaternary ammonium surfactant occupies sodium (Na) vacancies in the porous aluminosilicate material, and the hydrophobicity modifier is disposed on the quaternary ammonium surfactant [3].
A method of producing a mesoporous chitosan/sodium iron silicate (NaFeSi2O6) nanocomposite includes hydrothermally treating a mixture of sodium metasilicate pentahydrate (Na2SiO3·5H2O) with iron(III) chloride hexahydrate (FeCl3·6H2O) to obtain NaFeSi2O6 nanoparticles. The method further includes combining the NaFeSi2O6 nanoparticles with a solution of chitosan to generate a precursor mixture; treating the precursor mixture with sodium hydroxide (NaOH), resulting in a nanocomposite where chitosan coats and aggregates the NaFeSi2O6 nanoparticles into rod-like structures. The resulting nanocomposite exhibits unique textural properties with mesopores larger than 15 nm, is ideal for adsorption, separation, and catalysis, and can be produced under mild conditions without complex procedures or hazardous chemicals [4].
A method for synthesizing cobalt oxide nanoparticles includes mixing an aqueous solution of a cobalt precursor and L-valine to obtain a reaction mixture and heating up the reaction mixture to temperature of at least 100° C. to obtain a dry powder. The method further includes calcining the dry powder to obtain the cobalt oxide nanoparticles. The cobalt oxide nanoparticles have an average particle size of 200 nm or less. The cobalt oxide nanoparticles are substantially spherical and include mesopores having a total pore volume of 0.1 to 0.5 cm3/g [5].
A CuMg0.5Mn1.5O4/CuO nanocomposite material includes a cubic CuMg0.5Mn1.5O4 crystalline phase; a monoclinic CuO crystalline phase; and a monoclinic CuO crystalline phase. The average crystallite size of the CuMg0.5Mn1.5O4/CuO nanocomposite material is in a range from 50 to 90 nm [6].
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