Preparation method of nano titania for air purification

Abstract

A preparation method of nano titania for air purification comprises steps as follows: titanium iron ore is selected and processed into powder; concentrated sulfuric acid is added to the powdery titanium iron ore for acidolysis; still standing is performed after the ore is dissolved through acidolysis, slag is removed through filtration, and a primary filtered titanium liquid A is obtained; the titanium liquid A is cooled to the normal temperature and crystalized to separate iron dichloride tetrahydrate, and a secondary filtered titanium liquid B is obtained through filtration; an oxidizing agent is added to the secondary filtered titanium liquid B, and a solution D is obtained; cerium nitrate is added to the solution D, sodium hydroxide is added, the PH is adjusted to be alkaline, and sufficient mixing is performed; activated carbon fiber is added, soaking is performed under the ultrasonic condition, and a mixed liquid D is obtained; the mixed liquid D is aired, calcined and ground into powder, and cerium-doped nano titania powder is obtained. The nano titania is small in particle size and good in dispersity, the quantum effect of the nano titania is improved, and the air purification effect is improved; the reaction process is environmentally friendly and pollution-free.

Description

technical field [0001] The invention relates to the field, in particular to a method for preparing air-purifying nano-titanium dioxide. Background technique [0002] Titanium dioxide has stable physical properties, chemical properties, excellent optical and electrical properties, and excellent pigment performance, so it is widely used. Coatings, plastics, rubber, chemical fibers, papermaking, inks, cosmetics, toys, capacitors, picture tubes, cutting-edge defense technology, food, medicine, chemical reagents, welding electrodes, enamel, ceramics, glass, refractory materials, metallurgy, artificial gemstones, art paints Titanium dioxide is used in food, leather, printing and dyeing paste, soap, catalyst, etc. [0003] At present, the production of titanium dioxide mainly includes the chloride method and the sulfuric acid method. The chlorination method has advanced technology, short process, easy automation and good product quality. However, high-grade raw materials are req...

AI Technical Summary

Problems solved by technology

However, high-grade raw materials are required, and rutile ore is used, which is a scarce resource; the technology is difficult, and materials and equipment that are resistant to titanium tetrachloride, chlorine, and oxygen are required at high temperatures. The investment cost is high, maintenance is difficult, and the advantages are gone.

The sulfuric acid method has cheap raw materials, mature technology, and simple equipment, but the process is long, high energy consumption, high discharge of three wastes, and poor product quality