Preparation of Copper Modified Violet Tungsten Oxide

Copper modified violet tungsten oxide is a kind of photocatalyst with good photocatalytic performance. As for its preparation, solution method is applied. This kind of preparation method is not only simple, but is suitable for large-scale production.

During the preparation of copper modified violet tungsten oxide, ammonium meta tungstate (tungsten source), copper nitrate (copper source), ammonium nitrate and auxiliary agents (at least one of glycine, urea, thiourea and citric acid) are used as raw materials. Then the raw materials are mixed evenly into a solution according to a certain proportion. Finally, the mixed aqueous solution is heated. With the evaporation of the aqueous solution, a large amount of gas is produced. After oxidation-reduction reaction of several tens of seconds, copper modified violet tungsten oxide is successfully prepared. The prepared copper modified violet tungsten oxide with good photocatalytic performance has broad application prospects in the field of photocatalytic material.

Here are the characteristics of the preparation method as following as:

1. The preparation process is simple and fast. This kind of preparation method with low cost is suitable for large-scale production.

2. The morphology of product can be controlled by controlling the kind and ratio of raw materials.

3. A uniform mixing of the reactants at the atomic level can be realized by mixing raw materials by a liquid phase, so as to obtain product with perfect pore structure.

4. A large amount of gas is produced in the reaction process, which avoids the direct contact of reactants with oxygen. In this way, violet tungsten oxide can be prepared successfully.

5. As the copper content is low, the copper ions enter the lattice of violet tungsten oxide, rather than forming a mixture of copper oxide and violet tungsten oxide. At the right concentration, product with best photocatalytic performance can be successfully prepared.

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