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TiO2 precursor has been synthesized by sol-solvothermal method with tetrabutyl titanate as raw material. Nitrogen-modified TiO2 with different reaction temperatures (150, 180, 200 °C) was successfu...

To enhance the photocatalytic efficiency of TiO2, different concentration of Ce3+-doped TiO2 nanotubes were prepared using a sol-gel method combined with a hydrothermal process. After being calcined at 450°C, the morphology, composition, and crystal structures were investigated by SEM, TEM, XRD, and EDS. The samples' photocatalytic performance was characterized by degrading methylene blue under illumination of a 250 W UV-light. The result showed that both ends of the nanotubes were ringent and consisted of many layers. Their length could reach to hundred nanometers and the thickness of the walls was about 9 nm. The low-concentration Ce3+ did not influence the nanostructure and crystal structure but has a large correlation with the photocatalytic efficiency. The sample with the concentration of 1.5% performed best in photocatalytic reaction.

The mesoporous TiO2 nanoflakes have been prepared by the hydrothermal method, which is using Ti(SO4)2 as the titanium raw and KOH solution as alkaline medium. The TiO2 nanoflakes have been characterizated by transmission electron microscopy, X-ray powder diffraction, N2 adsorption–desorption analysis, cyclic voltammetry, and cycle performance test. Electrochemical performance test shows that mesoporous TiO2 nanoflakes have high discharge specific capacity and good cycle performance. Discharge specific capacity for the first time is in 0.2 C ratio of 278.1 mAh g−1. After 90 cycles, the discharge capacity reduces to 97.6% of the theoretical specific capacity.

To improve the photocatalytic property of TiO2, Fe3+-doped TiO2 nanotubes were fabricated by sol-gel and hydrothermal method. The prepared materials were characterized by XRD and TEM techniques. The photocatalytic properties of samples were evaluated based on the degradation of aqueous methylene blue solution under visible light. The obtained anatase-type titania nanotubes were hollow scrolls with outer diameter approximately 13 nm and length about 90–120 nm. The results showed that appropriate content of ferrum ion can improve the photocatalytic activity of titanium dioxide nanotubes significantly.

o-LiMnO2 and LiMn1−xCrxO2 (x = 0.1) powders were synthesized via hydrothermal method after being calcined. Crystalline structure, surface morphology, and electrochemical properties of the prepared powders are investigated by XRD, SEM, and cyclic voltammetric studies. From the results, it was found that LiMnO2 cathode with a small amount of doping Cr is mostly orthorhombic forms. It could not only affect the structure of the specimens, but also improve cycling performance and reversible capacity and it could reach 190 mAh/g after 50 cycles.

The purpose of this study was to investigate the possibility for parenteral delivery of Gamma-linolenic acid methyl ester without chemical modification using a microemulsion. Microemulsions composed of gamma-linolenic acid methyl ester and Tween 80 were prepared using PEG 400 as a cosurfactant. The effect of formulation variables on the particle size of the microemulsion was investigated. TEM image indicates the liquid droplets of the microemulsion are spheral shape. The mean droplet size of microemulsion system (Tween 80: GLA = 3:1) by PCS was about 50 nm and no changes were noted for at least six months.

Nanoporous Ni was fabricated on polystyrene (PS) sphere templates by an electrochemical deposition method. Monodisperse PS microspheres were prepared by microemulsion polymerization. The PS spheres were coated on Cu substrate using electrophoretic deposition method. Afterward, Ni was coated on PS template using electroplating deposition method. Last, the composite material had been soaked in acetone solution for 12 h to obtain nanoporous Ni. We have successfully obtained porous Ni with aperture of 280 nm, porous density of sample is 7 × 1010 ind/cm2, the specific capacitance of porous Ni is 62 Fg−1.

The nickel-doped titanium dioxide nanotubes were prepared by Sol-gel and hydrothermal method and used to photodecompose methylene blue (MB) in liquid phase under visible light irradiation. The anatase-type titania nanotubes were shown to be hollow scrolls with outer diameter of about 10–15 nm and length of several hundred nanometers. The photocatalytic properties of Ni-doped titanium dioxide nanotubes and nanopowders were studied by degrading of MB. The results show that appropriate content of nickel can effectively enhance the photocatalytic activity of titanium dioxide nanotubes.