Preparation method of micro-nano tin dioxide solid spheres

Abstract

The invention relates to the preparation of micro-nano materials, and aims to provide a preparation method of micro-nano tin dioxide solid spheres. The method comprises the following steps: respectively preparing a SnCl4.5H2O aqueous solution and a NaOH solution, uniformly dropwise adding the NaOH solution into the SnCl4.5H2O aqueous solution, and stirring at a high speed; transferring the mixed solution to a polytetrafluoroethylene reaction kettle, and carrying out a hydrothermal reaction on the mixed solution; carrying out centrifugal separation or filtering on the obtained product, washing the obtained object until no soluble ion exists in the solution, and drying, so that white powder is obtained; and putting the powder into a chamber electric furnace or a muffle furnace to calcine, and carrying out furnace cooling on the obtained product, so that white or light yellow powder, namely, micro-nano tin dioxide solid spheres, is obtained. Products prepared according to the preparation method disclosed by the invention are good in sphericity, smooth in surface, and uniform in size; no organic solvent as well as volatile poisonous gas and the like is used in the preparation process, so that only do sodium salts exist in products, and therefore, the product has no pollution to the environment; and no template is used, so that the method is simple in process, easily controlled in reaction process, mild in reaction condition, simple in raw material and low in cost, and therefore, the method is specially suitable for large-scale industrial production.

Description

Technical field [0001] The invention belongs to the field of micro-nano material preparation and its technical application, in particular to a preparation method of micro-nano tin dioxide solid spheres. Background technique [0002] Tin dioxide is a semiconductor material with high hardness, good chemical stability, and excellent photoelectric properties. It has important application value in electronic components, lithium-ion batteries, gas sensors, super capacitors, transparent electrodes and catalytic materials. In recent years, structural materials such as tin dioxide nanoparticles, nanowires, nanobelts and hollow spheres have been widely studied and applied, and there are many preparation methods. For example, Chinese patent CN 1789140A (publication number) discloses a zinc oxide A method for preparing hollow tin oxide sphere materials as a sacrificial template; Chinese patent CN 101012067A uses natural polymer powder as a template to prepare hollow tin oxide spheres. Howev...

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Problems solved by technology

However, at present, the preparation process of these tin dioxide with special morphology is relatively complicated, and the preparation process is low in environmental protection, especially when it is used as a reinforcing phase of ceramics, metals and other materials, it is difficult to densify, or the process to achieve densification is complicated and costly, which is not conducive to long-term production. large-scale industrial production

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