Method for preparing nano titanium dioxide at high temperatures

Abstract

The invention relates to the field of preparation of photo-catalytic materials, in particular to a method for preparing anatase nano titanium dioxide at high temperatures. According to the technical scheme, the method for preparing the anatase nano titanium dioxide comprises the following steps of (1) preparing titanium dioxide sol; (2) preparing titanium dioxide reaction liquid; (3) preparing high-temperature amorphous titanium dioxide; and (4) preparing the anatase nano titanium dioxide. Compared with the prior art, the method for preparing the anatase nano titanium dioxide at the high temperatures has the obvious advantages that nano titanium dioxide powder with high purity and even particle sizes can be prepared by the aid of the method; the titanium dioxide is white and neutral and is free of odor and good in stability; and the method is simple in process, low in cost and high in product purity.

Description

technical field [0001] The invention relates to the field of preparation of photocatalytic materials, in particular to a high-temperature preparation method of anatase nano-titanium dioxide. Background technique [0002] In recent years, photocatalytic oxidation technology, as an advanced oxidation technology, has attracted increasing attention from scholars at home and abroad. Almost all organic compounds can be completely oxidized to CO by photocatalysis 2 、H 2 O and other simple inorganic substances. Among the photocatalytic oxidants, especially the metal oxide semiconductor titanium dioxide (TiO 2 ) is the most typical. At present, the utilization of TiO2 reported at home and abroad 2 In the technology of catalytic oxidation of organic pollutants, TiO in the dispersed phase is mainly used 2 and stationary phase of TiO 2 . The photocatalytic oxidation of organic matter oxidation using semiconductor photocatalyst has a good oxidative decomposition effect on the tox...

AI Technical Summary

Problems solved by technology

However, the existing preparation methods of titanium dioxide powder, such as traditional solid-state reaction and sintering method and modern chemical vapor deposition method, physical vapor deposition method, chemical vapor infiltration method, sol-gel method, etc., these methods have complex processes, The disadvantage of high cost is that the resulting mixed crystal form and uneven particle size are often obtained, because the photocatalytic degradation activity of rutile titanium dioxide and amorphous titanium dioxide is very poor