Yellow tungsten oxide nanopowder can not only be applied for producing ceramic microsphere with high dispersity and excellent dyeing effect, but also be used as a type of special wettability material for emulsion separation in water pollution control. It is an important inorganic material that can be applied in the treatment of oil waste water.
For example, yellow tungsten oxide film composed of a plurality of micron square prisms and microspheres may be prepared on a 2300 mesh stainless steel mesh by changing hydrothermal conditions. The results show that the obtained yellow tungsten oxide film has an underwater oil contact angle of up to 155°, which reflects its good underwater superoleophobicity. By combining the superhydrophilic-underwater superoleophobicity of the yellow tungsten oxide material with the tiny pore size of the high mesh stainless steel mesh, the obtained yellow tungsten oxide film can effectively separate the layered oil-water mixture and the simple oil-in-water emulsion.
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