Method for preparing pure phase bismuth titanate and titanium oxide composite material by using alcohol heat method

A pure-phase bismuth titanate and composite material technology, which is applied in the field of preparation of bismuth titanate-titanium oxide composite materials, can solve the problems of high process requirements and complex synthesis routes, and achieve the effect of simple preparation process and low cost
CN104069848AActive Publication Date: 2014-10-01NANJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING NORMAL UNIVERSITY
Publication Date
2014-10-01

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Abstract

The invention discloses a method for preparing a pure phase bismuth titanate and titanium oxide composite material by using an alcohol heat method. The method comprises the following steps: adding a bismuth nitrate solid in a mixed solvent of glycerin and ethyl alcohol the volume ratios being (0.05-0.2) to 1, fully dissolving the bismuth nitrate solid in the mixed solvent, dropwise adding tetrabutyl titanate in the solution, stirring and carrying out ultrasonic treatment on the solution, transferring the mixed solution in a reaction kettle, arranging the reaction kettle in a 110-150 DEG C constant temperature oven and reacting for 18-24h, cooling, filtering and drying a mixture in the reaction kettle, burning the mixture in a procedure temperature control furnace for 1-3h under 500-600 DEG C, and preparing the pure phase bismuth titanate and titanium oxide composite material. The method provided by the invention has the advantages that the bismuth titanate and titanium oxide composite material with different types and shapes are obtained by controlling, bismuth titanate comprises a pure phase Bi4Ti3O12, Bi2Ti2O7 or Bi2TiO32, and the shape of the composite material comprises a globular shape, a petal shape, a three-dimensional layer shape and a piece shape and the like.
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Description

technical field

[0001] The invention belongs to the field of materials and catalysts, and in particular relates to a method for preparing a bismuth titanate-titanium oxide composite material. The prepared composite material has good photocatalytic degradation activity of organic pollutants under sunlight. Background technique

[0002] In recent years, heterojunction compound semiconductor materials formed by the coupling of narrow bandgap semiconductors and wide bandgap semiconductors have attracted the attention of researchers. Among various narrow-bandgap semiconductors, bismuth titanate compounds (Bi 2 Ti 2 o 7 、 Bi 12 TiO 20 、 Bi 20 TiO 32 etc.) are a class of semiconductor photocatalytic materials with high visible light activity. TiO with high band gap energy 2 (3.2eV) and bismuth titanate compounds with low bandgap energy can form potential barriers and energy valleys at the interface, change the migration process of photogenerated carriers, and promote the ef...

Claims

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