Semiconductor Nanomaterials TiO₂, ZnO Modified And Its Performance Study

Nano-ZnO and TiO2nanoparticles in inorganic functional materials has played an important role, TiO2become the most attention of the photocatalytic material, because of its large surface area and unique optical properties. ZnO has a high chemical and mechanical stability and excellent electro-optical properties, and are widely used in the light emitting diodes, solar cell, a transparent electrode, etc. So for preparing the dispersion, and morphology controllable inorganic functional materials, and exploring its performance has important theoretical and practical significance.1, TiO2nanotube arrays by anodizationThis paper has took simple process to prepare a series of inorganic nano-materials, focused on the doping change in the nature of nanomaterials and discussed from nano-materials preparation, characterization and formation mechanism and applied research aspects respectively. This paper has discovered this materials photocatalytic and luminescence properties and so on, and researched the factors of morphology, size and structure on the inorganic material properties important influence, used simple, economical method for the synthesis of nanomaterials, achieved to control its structure, the growth direction, dimensions, size, composition, explored them in the fuel cell and industrial catalysis application prospects. Inorganic functional materials achieve its large-scale production and application.Constant anodic oxidations were used preparing TiO2nanotube arrays. The electrolyte type, anodizing voltage, oxidation time and the organic electrolyte water content influenced on morphology, structure of the tube array. The results showed that the type of electrolyte is to get the key TiO2nanotube arrays. In a high dielectric constant and viscosity coefficient of the organic electrolyte, smooth and good smoothness nanotubes can be prepared, in ethylene glycol/water mixture solution. The same electrolyte system, TiO2nanotube arrays formation requires specific oxidation voltage, and the diameter of the nanotubes increased with increasing oxidation voltage. 2, Two-step preparation of N-doped TiO2nanotubes and their photocatalytic properties.Electrochemical anodic oxidation method prepared regular morphology, orderly arranged, hollow TiO2nanotube materials in the presence of F-. Then Ti substrate as the cathode, platinum as anode, clears structure of N-doped TiO2nanotubes were prepared by cathode deposition. The XRD analysis showed the doped TiO2well, on the structure of N-doped TiO2showed anion N doping on the architectural features had a major impact, and the photocatalytic properties and utilization of sunlight improved.3, Hydrothermal Mo-doped ZnO and its optical propertiesBy a low temperature hydrothermal method, complex solvent ethylene glycol/water reaction solution, Mo-doped ZnO were synthesized. Changing the type of auxiliary agents different morphologies, structural nano ZnO were synthesized, by supplemented additives of CTAB, SDS, PVP-K30, PEG400, EDTA, prepared Mo doped ZnO nanomaterials and were obtained rod-like structure, the tip rod-shaped structures flower-like structure six prismatic rod, six prismatic rod, sheet consisting of spherical nanoparticles and one-dimensional six prismatic micrometer rods. U-V spectra showed doping concentration impacted the luminescent properties of ZnO. Doped ZnO oxygen vacancies increased, the energy gap wided,"blue shift", absorption of visible light significantly enhanced. The green emitting at572nm and the luminous intensity varies with the molybdenum concentration.