Nano Silver Tungsten Trioxide Preparation

There are many problems in traditional sewage treatment methods, such as adsorption, coagulation, activated sludge methods which are low efficiency, high cost, no secondary in pollution. In the grim background of global energy shortage, environmental pollution problems have become increasingly. The efficient use of clean, no secondary pollution photocatalytic technology of solar energy is one of the preferred methods of treatment of pollutants. Taking tungsten trioxide and nano-materials as the matrix, nano-silver tungsten trioxide is commonly used in the preparation of photocatalytic degradation of organic pollutants and photolysis of water. This method belongs to the field of inorganic photocatalyst preparation technology, its catalytic efficiency can be greatly improved compared with other methods of, and the process is simple, environmentally friendly.

Experimental Method
Taking tungsten trioxide and nanometer chip as the matrix, by UV reduction method, making nano-silver uniform load on the tungsten trioxide nanosheets, and then making it be baked under certain temperature in a wet state, which can obtain the new photocatalyst nano-silver loading tungsten trioxide so as to achieve the purpose of improving the tungsten oxide photocatalytic activity. Testing samples with nitrogen (N₂) adsorption - desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS) and photocurrent.

Results
The catalyst of tungsten trioxide photocatalyst supported nano silver with intact crystalline and regular pore structure is conducive to light green separation of electrons and holes. Meanwhile, as nano-silver tungsten trioxide solid state electronic receptor and transport the body to promote the photo-generated electron - whole pairs of transport and separation, this effectively improves the visible light catalytic performance. Doped with 2% (mass fraction) composite photocatalyst performance nano-silver tungsten trioxide is best, 4h 4-CP degradation can be more than 96%, catalyst can be reused many times, and its photocatalytic activity remained unchanged.

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