How to Prepare Photocatalyst of Copper Modified Violet Tungsten Oxide?

Violet tungsten oxide is a kind of photocatalyst with special surface structure and oxygen defect structure. In addition, copper can improve the response of the photocatalyst in the visible region. Therefore, copper modified violet tungsten oxide has broad application prospects in the field of photocatalyst.

Here is a preparation method of copper modified violet tungsten oxide as following as:

1. The Preparation of Raw Materials

(1) Tungsten source: ammonium meta tungstate (NH₄) ₆H₂W₁₂O₄₀

(2) Copper source: copper nitrate Cu (NO₃) ₂

(3) Ammonium nitrate NH₄NO₃

(4) Auxiliary agent: At least one of glycine, urea, thiourea and citric acid.

2. The Preparation of Solution

The selected raw materials are mixed evenly into a solution according to a certain proportion. Among them, the molar ratio of copper nitrate and tungsten source is 0.3:1. The molar ratio of ammonium nitrate and tungsten source is 12:36. And the molar ratio of auxiliary agent and tungsten source is 5:15.

3. Preparation of Copper Modified Violet Tungsten Oxide

The prepared aqueous solution is heated. With the evaporation of the aqueous solution, the solution is concentrated and a large amount of gas is produced at the same time. Vigorous oxidation-reduction reaction is happened within several tens of seconds so as to prepare copper modified violet tungsten oxide successfully.

The prepared copper modified violet tungsten oxide is nano powder with a diameter of 30-200 nm and a length of 1-3 μm. As copper particles can enter into the lattice of violet tungsten oxide and introduce defects to improve the photocatalytic property, copper modified violet tungsten oxide is a kind of material with good photocatalytic performance. It has a broad application prospect in the field of photocatalyst.

As for the preparation of copper modified violet tungsten oxide, it has the advantages of short reaction time, low trigger temperature and low cost.

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