Tellurium dioxide materials, especially high-purity nano-level Tellurium Oxide, have increasingly attracted widespread attention in the industry. So what are the characteristics of nano Tellurium Oxide, and what is the specific preparation method? The R & D team of UrbanMines Tech Co., Ltd. has summarized this article for the reference of industry.
In the field of contemporary material science, tellurium dioxide, as an excellent acousto-optic material, has the characteristics of high refractive index, large Raman scattering transition, good nonlinear optics, good electrical conductivity, excellent acoustoelectric properties, high internal transmittance of ultraviolet and visible light, etc. Tellurium dioxide is widely used in optical amplifiers, acousto-optic deflectors, filters, optical conversion…
Nanomaterials have the characteristics of large specific surface area and small particle size, which can make it produce surface effects, quantum effects and size effects. Therefore, in-depth research on tellurium dioxide nanomaterials is very necessary.
Nanomaterials have the characteristics of large specific surface area and small particle size, which can make it produce surface effects, quantum effects and size effects. Therefore, in-depth research on tellurium dioxide nanomaterials is very necessary. At present, the methods for preparing tellurium dioxide nanomaterials are mainly divided into thermal evaporation method and sol method. The thermal evaporation method is the process of directly evaporating elemental tellurium solid powder under high temperature conditions to obtain a new oxide. The disadvantages are that the reaction requires high temperature, the equipment is expensive, and toxic vapors are produced. Many tellurium dioxide nanomaterials have been prepared by evaporation. The Te elemental particles are evaporated by using an air microwave plasma flame to prepare spherical tellurium dioxide nanoparticles with a particle size distribution of 100-25nm. Park et al. evaporated Te elemental powder in an unsealed quartz tube at 500°C, modified the Ag film on the surface of the SiO2 nanorods, prepared Ag functionalized tellurium dioxide nanorods with a diameter of 50-100nm, and used them to detect the concentration of ethanol gas. The sol method uses the property of tellurium precursors (usually tellurite and tellurium isopropoxide) to be easily hydrolyzed. A stable transparent sol system is formed after adding an acid catalyst under liquid phase conditions. After filtration and drying, tellurium dioxide nano-solid powder is obtained. The method is simple to operate, environmentally friendly, and the reaction does not require high temperature. Utilize the weak acid properties of acetic acid and gallic acid to catalyze and hydrolyze Na2TeO3 to prepare tellurium dioxide nanoparticle sol, and obtain tellurium dioxide nanoparticles in different crystal forms, with particle sizes ranging from 200-300nm.
