Synthesis of NiO/ZnO Nanoparticles: Application for Photodegradation of Methylene Blue

NiO/ZnO nanocomposites synthesized by sol-gel method with zinc chloride and nickel nitrate hexahydrate in ethanol used as solvent. Material was characterized by Particle size analyzer, UV-Vis, FTIR, TGA and DSC. NiO/ZnO nanoparticles investigated as a suitable photocatalytic material for the methylene blue degradation i.e. an organic dye under visible light irradiation. The UV–vis absorption spectra of the NiO/ZnO nanoparticles shown peaks in the UV region, corresponding to the band gap of the NiO/ZnO nanoparticles. The band gap of NiO/ZnO nanoparticles is calculated 3.55 eV by Tauc’s plot method. Then UV visible data showed the methylene blue degradation with NiO/ZnO nanoparticles, behaving as active catalyst.

Characterization of Sol-gel Prepared Silica Supported NiO-CuO Composites

Silica (SiO2) supported nickel oxide-copper oxide (NiO-CuO) composites were synthesized through alkoxide route of sol-gel process using tetraethyl ortthosilicate (TEOS), nickel nitrate hexahydrate and copper nitrate trihydrate as precursors. A series of different compositions were prepared varying NiO:CuO molar ratios keeping all other process parameters constant. The gels thus obtained were calcined at a moderate temperature i.e. 500and#186;C for one hour. The crystal structure and thermal stability of metal oxide particles embedded in silica matrix were studied using X-ray diffraction technique (XRD) and differential scanning calorimetry (DSC-TGA) respectively. The purity of the composites was checked by Infrared spectroscopy (IR) whereas the composite formation was confirmed by scanning electron microscopy. The results revealed that crystals of NiO and CuO nanoparticles aggregated to form spheres of variable sizes were successfully embedded in the amorphous silica matrix composed of silica particles agglomerated to form clusters.

Single Pot Synthesis, Characterization of Nickel Schiff Base Metal Complex by in-Situ Method

The insitu synthesis of Schiff base metal complex using p-toluedine (p-tolu), p-anisaldehyde (p-anisal) as starting materials with Nickel nitrate hexahydrate (Ni(NO3)2.6H2O) used as a precursor for metal in equimolar ratio (1:1:1 M) at room temperature. The prepared metal complex is washed with several times with ethanol and boiled water for the complete removal of un-reacted species. To confirm the prepared material by the following characterization like UV-visible, Fourier Transforms Infrared spectroscopy, X-ray diffraction pattern and Cyclic Voltammetry.

In-Situ Synthesis and Characterization of Schiff base [Zn(Anil-oPD)4] Metal Complex

The insitu synthesis of Schiff base metal complex using o-phenylenediamine (oPD) and p-anisaldehyde (p-anisal) as starting materials with Nickel nitrate hexahydrate (Zn(NO3)2.6H2O) as a metal precursor in equimolar ratio (1:1:1 M) at room temperature. After the reaction time, the prepared metal complex washed several times with ethanol and boiled water for complete removal of un-reacted starting materials. The following characterization was used to confirm the metal complex by UV-visible spectroscopy (UV-Vis.), Fourier Transforms-Infrared spectroscopy (FT-IR), X-ray diffraction pattern (XRD) and Cyclic Voltammetry (CV).

Effect of Various Solvent on the Synthesis of NiO Nanopowders by Simple Sol-Gel Methods and Its Characterization

Synthesis of nickel oxide (NiO) with various solvents by simple sol-gel process has been done. NiO nanopowders were obtained by using nickel nitrate hexahydrate and sodium hydroxide 5 M were used as precursor and agent precipitator, respectively. The addition of various solvents that used in this research were aquadest, methanol and isopropanol. The powders were formed by drying in the temperature of 100-110 °C for 1 h and after heating at ±450 °C for 1 h. The products were obtained black powders. The products were characterized by Energy Dispersive X-Ray Fluorescence (ED-XRF), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The ED-XRF pattern show that composition of NiO produced was 96.9%. The XRD patterns showed NiO forms were in monoclinic structure with aquadest solvent and cubic structure with methanol and isopropanol used. Crystal sizes of NiO particles produced with aquadest, methanol, isopropanol were obtained in the range 37.05; 72.16; 66.04 nm respectively. SEM micrograph clearly showed that powder had a spherical shape with uniform distribution size is 0.1-1.0 µm approximately.

Single-step synthesis and catalytic activity of structure-controlled nickel sulfide nanoparticles

Nanoparticle single-phase nickel sulfides such as NiS, NiS2, Ni3S4, and Ni7S6 were prepared from elemental sulfur and nickel nitrate hexahydrate, using a temperature-controlled precursor injection method.