Method for preparing high activity titanium dioxide sol using industrial metatitanic acid as material

Abstract

The invention discloses a method for preparation of high-activity titanium oxide sol with industrial metatitanic acid as raw material, which is characterized in that it contains sequentially the following steps: (1) adding alkali to wash out sulfate ion, (2) adding acid to peptize, (3) proceeding dispergation with (a), (b) or (c) mode; when preparing transient metal or rare-earth metal loading-type (doping) sol, firstly preparing quantitative transient metal salt or rare-earth salt solution and adding into the metatitanic acid slurry without washing with alkali, then filtering and washing out to no sulfate ion; and when preparing noble metal-doping sol, adding noble-metal salt solution into the prepared pure sol, and placing under the irradiation of ultraviolet light for 0.5-10 hours and mixing at the same time. The merit of the invention is characterized in that: the raw material is cheap, the pollution is little, the dispersion degree and crystallization degree of prepared sol is good, and the visible light activity is highly improved by doping technique; and the sol property is improved by the microwave and supersonic after-treatment technique. The grain diameter of sol is very small, belonging to nanometer material.

Description

technical field [0001] The invention relates to a method for preparing high-activity titanium dioxide sol by using industrial metatitanic acid as a raw material, and belongs to the field of nanometer material preparation. Background technique [0002] my country's titanium reserves rank first in the world, accounting for more than 35% of the world's total, and more than 90% are concentrated in Panzhihua. However, the current utilization rate of titanium is less than 5%, which is basically used in the production of titanium dioxide, and the proportion of application in the environment is extremely small . [0003] Titanium dioxide has become the most widely used semiconductor material in the field of photocatalysis at home and abroad in recent years because of its high photocatalytic activity, corrosion resistance, stable properties, and non-toxicity. According to the predictions of authoritative organizations such as Japan, South Korea, Europe and the United States, the curr...

AI Technical Summary

Problems solved by technology

However, these organic and inorganic titanium raw materials are raw material products obtained from secondary or even tertiary processing of titanium ore, and their prices are relatively expensive, and the pollution during the production of these raw materials is relatively serious

Images