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Silica–cobalt composites with cobalt contents (w/w) around 10% were synthesized by employing the sol–gel method, tetraethylorthosilicate as the silica precursor and either a solution of cobalt nitrate or a colloidal dispersion of Co 3 O 4 or Co(OH) 2 nanoparticles as the cobalt precursors. Cobalt oxide was obtained by the precipitation of Co 2+ ions in alkaline medium...
Surface dilational moduli of poly(vinyl acetate) (PVAc), poly(methyl methacrylate) (PMMA), and PVAc/PMMA blend films spread at the air–water interface were investigated as a function of surface concentration. Moreover, the surface dilational moduli of the PVAc/PMMA blend films were measured as a function of the molar fraction of PVAc for the first time. The surface dilational modulus of an expanded...
The formation of vesicular structures in aqueous solutions of protic ionic liquids (PILs) of synthesized diisopropylethylamine alkyl carboxylates [DIPEA][C n H 2n+1 COO] (n=3–9) was demonstrated by conductivity and surfaces tension measurements and was then further investigated by morphological observation techniques such as dynamic light scattering (DLS), SAXS, freeze-fracture scanning...
We investigate the alignment of 4′-pentyl-4-cynobiphenyl (5CB) liquid crystal on phase-separated two-component organosilane monolayers that consist of the protruding islands surrounded by a continuous phase. The molecular disordering at the protruding island edge locally perturbs the homeotropic alignment of the 5CB induced the phase-separated monolayers, leading to the formation of ring patterns...
Novel quaternary ammonium Gemini surfactants, which turned out to be ionic liquids due to the intermolecular hydrogen bonding formed from hydroxyl groups in the spacers, were synthesized and characterized by IR, 1 H NMR, 13 C NMR and mass spectra. The surface properties of the Gemini surfactants were investigated by means of surface tension measurements. Surface tension parameters...
Hollow spheres and colloidal nanocrystal clusters (CNCs) of MnFe 2 O 4 with similar submicron scales have been synthesized controllably by a solvothermal method through simply adjusting the synthesis microenvironment. Morphology and microstructure of the products were investigated by the power X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy...
We successfully introduced a cleaved disulfide on the surface of silica nanoparticles (SNPs), which can be used to enrich Cd (II) ion in aqueous solution. Firstly, the thiol-coated SNPs reacted with 4,4′-dithiodipyridine to form disulfide linkage on the surface of nanoparticles, then benzimidazole molecules were grafted on the surface via a cleaved disulfide linkage. TEM, FT-IR and XPS were used to...
We report a simple one-pot method to prepare organically functionalized CeO 2 nanoparticles by controlled chemical precipitation. The particles were nucleated by mixing aqueous solutions of Ce(NO 3 ) 3 ·6H 2 O and ammonia at room temperature. Different small organic molecules were chosen as capping agents and injected into the reaction medium at the beginning of the...
This paper described the preparation of one-dimensional (1D) chains of Fe 3 O 4 particles via oxidation–coprecipitation phase transformation under an external magnetic field (EMF). The phase transformation of magnetite (Fe 3 O 4 ) under an EMF was investigated using the as-obtained Fe 3 O 4 as the control. Fe 3 O 4 nanoparticles formed...
Effect of aluminum fluoride complexation on fluoride removal by Al salts coagulation was investigated by a series of batch experiments. Transformation of fluoride species in coagulation was studied by simultaneous determination of free fluoride and total fluoride at different pH and fluoride concentrations. Results showed that aluminum fluoride complexes dominated at low pH and high fluoride concentrations...
Two kinds of Pd nanoparticle aggregates with different electrocatalytic activity are developed in a facile hydrothermal synthesis method. The average size of Pd nanoparticles synthesized from the mixed solvent containing water and acetone (Pd–M) is ∼9nm smaller than that of Pd samples synthesized from aqueous systems (Pd–A) with the size of ∼14nm. Nanoparticles of Pd–M and Pd–A show the crystalline...
A highly redox active and stable nano copper species immobilized functionalized-multiwalled carbon nanotube (f-MWCNT)+chitosan (CHIT) film coated glassy carbon electrode (Cu@f-MWCNT+CHIT/GCE) was fabricated using a new preparation procedure, different from the conventional Cu 2+ +MWCNT+CHIT bulk electro-codeposition coupled glassy carbon surface activation method, for selective and sensitive...
Sorption of U(VI) on silica surface was investigated in NaClO 4 medium as a function of pH, ionic strength, and U(VI) concentration by employing batch sorption experiments and surface complexation modeling (SCM). The effect of complexing anions viz., carbonate and citrate on U(VI) sorption was also studied. The U(VI) sorption on silica was found to increase with increasing pH of the suspension...
A method has been developed to incorporate multiple hydrophobic CdSe/Cd x Zn 1−x S QDs into SiO 2 beads by a two-step microemulsion process and retain the high photoluminescence (PL) efficiencies of the QDs. In step 1, the QDs were silanized by using partially hydrolyzed tetraethyl orthosilicate (TEOS) via replacing oleic acid (OA) on the surface of QDs. In step 2, these silanized...
A pH- and thermo-sensitive berberine hydrochloride liposome modified by the poly(N-isopropylacrylamide-co-methacrylic acid-co-octadecyl acrylate) was synthesized. The morphology and size were determined by atomic force microscope (AFM) and dynamic light scattering (DLS). The phase transition temperature (T pm ) and phase transition pH (pH*) of the copolymer–liposome were obtained by differential...
The rheological behavior and microstructure of anionic fatty acid methyl ester sulfonate sodium (MES) surfactant micelle solution with pyroelectric nanoparticle were investigated by dynamic light scattering (DLS), freeze-fracture transmission electron microscopy (FF-TEM) and rheological measurement. The formation of wormlike micelle due to salt addition was observed and the nanoparticle can accelerate...
An alternative approach to the utilization of lignocellulosic biomass is reported in this paper. It was the first time that rice husk was used as carbon source to synthesize carbon coated silica particles. Rice husk was hydrolyzed and mixed with silica powder, then biochar coated silica particles were simply in situ synthesized. The coating morphology was similar to those who used pure chemicals or...
In this article, three-dimensional (3D) Ag/β-Ni(OH) 2 flower microspheres were synthesized through a facile hydrothermal method in the presence of l-arginine. The results suggest that this biomolecule-assisted hydrothermal method is an efficient route for the fabrication of Ag/β-Ni(OH) 2 flower microspheres by using l-arginine as both a shape controller and a reducing agent of silver...
Herein we report on a simple and reliable hydrothermal method to prepare superhydrophobic TiO 2 surface on fluorine-doped tin oxide (FTO) coated glass substrates. The surface shows a novel cactus-like cluster structure composed of TiO 2 submicron rods with lengths ranging from 1μm to 3μm. After modified with stearic acid, the as-prepared surface shows a remarkable superhydrophobicity...
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