Reticular nano hole zinc oxide micron hollow ball and preparation method thereof

Abstract

The invention discloses a reticulate nanopore zinc-oxide micron hollow sphere and a preparation method thereof. The hollow sphere of the invention comprises the following materials: the surface of the zinc-oxide micron hollow sphere is provided with reticulate nanopore, wherein, the diameter of the hollow sphere is 1 to 10mum and the aperture of the nanopore is 50 to 100nm; the method of the invention comprises a liquid-phase chemical method, particularly (a) according to the mole ratio that zinc salt: chelating agent: sodium citrate: water is equal to 1:(0.5-1.5):(0.05-0.15):(50-150), the materials are weighted, then put into a vessel, stirred, dissolved and kept warm for three hours at the temperature of 70 to 100 DEG C under the sealing state to obtain a product; (b) the obtained product is filtrated, washed more than one time and heated for 1 to 3 hours at the temperature of 300 to 500 temperature, and the reticulate nanopore zinc-oxide micron hollow sphere is obtained; the zinc salt is zinc nitrate or zinc acetate or zinc chloride or zinc sulfate, and the chelating agent is urea or ammonia or hexamethylene tetramine or ammonium hydroxide. The hollow sphere can be widely applied to the fields of drug transportation, chemical reaction carrier, cosmetics, coating material, catalytic and photocatalysis material, etc.

Description

technical field [0001] The invention relates to a zinc oxide hollow sphere and a preparation method thereof, in particular to a mesh nanoporous zinc oxide micron hollow sphere and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, while enjoying the benefits brought by modern technology, people have also tasted the evil consequences of industrialization - environmental pollution. Since the discovery that semiconductor materials can catalyze the degradation of organic pollutants after exposure to light, the search for efficient and non-toxic catalysts has been the goal of people's efforts, and very fruitful research and application results have been achieved. Semiconductor materials, especially wide-bandgap semiconductors, such as titanium dioxide and zinc oxide, have shown broad application prospects in wastewater treatment, air purification, and photochemical cells. An important condition for improving the efficiency ...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in this preparation method. First of all, it cannot produce zinc oxide micron hollow spheres whose surface is a network-like nanometer-sized porous structure; secondly, it uses zinc powder as a starting material, so the prepared oxide The shape and quality of the zinc hollow spheres depend entirely on the shape and quality of the raw zinc powder. The diameter of the final zinc oxide hollow spheres is equivalent to the size of the initial zinc powder. To obtain uniform zinc oxide hollow spheres, it is necessary to Zinc powder must be screened, which will increase the cost of production; again, the precursor product obtained in the preparation is Zn / Zn(OH) 2 The core / shell structure needs to be calcined at a higher temperature of 600-900°C to make the surface Zn(OH) 2 It is converted into zinc oxide, and the zinc inside is evaporated and oxidized at the same time, so the shape and size of the hollow part in the ball are difficult to control; finally, the organic solvent ethanol is used in the preparation, which not only increases the cost, but also easily pollutes the environment

Images