Method for synthesizing quadrangle tungsten oxide nano-powder

Abstract

The invention relates to a preparation method of square tungsten oxide nano powder, belonging to the field of inorganic non-metallic materials. The content thereof is as follows: tungstenic acid deposition obtained by the reaction of sodium tungstate and hydrochloric acid is used as a precursor, citric acid is used as an auxiliary reagent, hydrochloric acid is used to adjust pH value and nano tungsten oxide is grown in a high-pressure autoclave by heating. Heating mode can be microwave heating and resistance wire heating, and the nanocrystalline grown is square. The characteristic of the square tungsten oxide powder material is that: the size of the square tungsten oxide is between 80 and 150nm. The advantages of the method are that: the process is simple, the cost is low and the shape and size of the tungsten oxide crystal are hydrothermally controlled by the citric acid auxiliary.

Description

Technical field: [0001] The invention relates to a preparation method of square tungsten oxide nanopowder, which belongs to the field of inorganic non-metallic materials. Background technique: [0002] Nano WO 3 It has a strong ability to absorb electromagnetic waves, can be used as an excellent absorbing material in the use of solar energy, and can be used as an important invisible material in the military; it also has a huge specific surface area and significant surface effects, and is a very promising application. catalyst for NO x 、H 2 S, O 3 , NH 3 Good sensitivity to various gases, and TiO 2 The performance of composite photocatalysts formed by such materials is better; it has been widely used in fuel cells, chemical sensors, photoelectric devices and other fields. In recent years, due to the development of tungsten oxide nanomaterials preparation technology, the discovery of metastable high-efficiency discoloration and proton transfer properties, based on the ul...

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Problems solved by technology

[0003] At present, the literature reports on tungsten oxide with special morphology can be roughly divided into three types: one is high-temperature synthesis, and the quality of the synthesized nanomaterials is also good, but it requires high equipment and consumes too much energy, making it difficult to promote on a large scale; It is the low-temperature synthesis in the solution. The shape uniformity of the nanopowder materials prepared by this method is poor. The third is the hydrothermal synthesis. Rod

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