Method for preparing titanium oxide through reducing titanium-containing complexes at normal temperature

Abstract

The invention discloses a method for preparing titanium oxide through reducing titanium-containing complexes at normal temperature. The method is characterized in that reduction reaction occurs in a normal temperature liquid phase; the potential safety hazards due to mixing of reducing agents and air are eliminated; the reduction is performed in the liquid phase, the microscopic uniformity is high; the firing temperature is low; the time is short. The method has the following principle and steps that titanium sulfate or titanium tetrachloride and ammonium hydroxide or sodium hydroxide take a reaction to obtain titanic acid; the titanic acid reacts with oxalic acid or citric acid to form an oxalate oxytitanate complex-ion or oxytitanate citrate complex-ion solution; next, reaction is performed with zinc powder; the complex ions are reduced into low-valent titanium complex ions; the pH value of the solution is regulated to 12 by ammonium hydroxide; precipitates of dark brown color to dark violet color are generated; washing is performed for 3 to 5 times by 3 to 5 times of deionized water; the zin is washed away in an ion ZnO2<2-> form to obtain pure titanium hydroxide precipitates; oxalic acid is added until the pH is 0.5 to 1.5; drying is performed to 2 to 5 hours at 120 to 180 DEG C; the temperature is raised from room temperature to 820 to 950 DEG C by a muffle furnace; roasting is performed for 2 to 6 hours; titanium oxide spherical powder with the Ti4O7 content being 90 percent or higher is obtained.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a method for preparing inorganic functional materials, in particular to a method for preparing titanium oxide by reducing a titanium-containing complex at normal temperature. Background technique [0002] Titanium oxide refers to a series of non-measured titanium oxides other than titanium dioxide or titanium monoxide, which can be represented by the general formula Ti n o 2n -1 (n=4~10) indicates that this type of compound was discovered by Magnéli through XRD analysis in the 1950s, and is also called Magnéli phase titanium suboxide material, which is different from titanium dioxide and is a black conductive material. [0003] In this series of Magnéli phase titanium oxides, Ti 4 o 7 The properties are the most prominent, its physical and chemical properties are stable, and it has excellent electrical conductivity. At room temperature, its electrical conductivity is even gr...

AI Technical Summary

Problems solved by technology

The properties and functions of titanium dioxide in other phases need to be researched and developed, but the key is to prepare titanium dioxide in a single phase rather than a series of titanium dioxide mixtures that can be afforded by the application, with high purity. The high manufacturing cost and small output of titanium oxide lead to high price of titanium oxide, especially for the preparation of high-purity Ti 4 o 7 It is a technical problem that needs to be solved at present

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