Preparation method of ultrafine high-purity antimony-doped tin oxide nanometer powder

Abstract

The invention relates to the field of nanomaterial synthesis, and discloses a preparation method for ultrafine high-purity antimony-doped tin oxide nanopowder, which comprises the following steps: taking tin particles or tin-containing compounds, antimony-containing compounds, adding strong acid, and then adding oxidizing agent and deionization Water or ultrapure water is then transferred to a closed reaction kettle, reacted at 120°C-200°C for 1-24h, cooled to room temperature, centrifuged and washed until neutral, dried, and ground to obtain antimony-doped tin dioxide nanoparticle powder. No anion impurity is introduced in the preparation process of the present invention, which ensures high purity of the prepared nanoparticles. The invention is easy to dope accurately and according to the amount, and solves the technical problems in the prior art that the doping is uneven, the particles contain anion impurities, and the particles are easy to agglomerate; the nano particles synthesized by the invention have high purity, small particle size and are easy to disperse. The coated glass prepared by the nano particles of the invention has high visible light transmittance, has the function of blocking infrared rays, and has low resistance, and can be applied to low-radiation glass and transparent conductive glass.

Description

technical field [0001] The invention relates to the field of synthesis of nanomaterials, in particular to a preparation method of ultrafine high-purity antimony-doped tin oxide nanopowder. Background technique [0002] Antimony Doped Tin Oxide (ATO) is a new type of multifunctional semiconductor material, which has the characteristics of good electrical conductivity, good light transmission, high temperature resistance, corrosion resistance and excellent infrared reflection performance. As a highly conductive and transparent oxide, ATO is widely used in electronic nano-devices, such as electronic displays, solar cells, and other high-grade transparent antistatic coatings. Because of its excellent infrared reflection performance and excellent light transmission performance, ATO can be used as a heat insulation material, and is widely used in energy-saving glass doors and windows, vehicle windshields, etc. The superior stability of ATO is the embodiment of its commercial valu...

AI Technical Summary

Problems solved by technology

But there are the following disadvantages: (1) the salt of tin (Sn) and antimony (Sb) is very easy to hydrolyze, and it is difficult to exist in the form of ions, and Sb 3+ and Sn 4+ The hydrolysis is not synchronized, and it is difficult to achieve uniform doping; (2) due to other ions (Cl - , NO 3 - ) exists in the reaction system, it is difficult to remove, and the prepared ATO material is not pure; (3) due to the adsorption of anionic impurities on the surface of ATO particles, the particles are agglomerated, which cannot meet the requirements of the preparation of small particle ATO

The hydrothermal reaction can improve the reactivity, and it is easy to control the temperature to adjust the particle size. However, the commonly used precursors are still tin (Sn) and antimony (Sb) chlorides and nitrates. How to remove these anionic impurities is still a big problem. problem

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