Nano tungsten oxide may be used for the preparation of thermal absorption agricultural plastic film, such as the preparation of agricultural and horticultural land cover film. The obtained agricultural film is an infrared light absorbing layer containing infrared absorbing material nanoparticles. And the infrared absorbing material nanoparticles are tungsten oxide nanoparticles and/or composite tungsten oxide nanoparticles. And the tungsten oxide nanoparticles are tungsten oxide nanoparticles represented by the general formula WOX (2.45≤X≤3), and composite tungsten oxide nanoparticles is represented by the formula MYWOZ (0.001≤Y≤1.0, 2.2≤Z≤3.0).
The tungsten oxide nanoparticles and/or the composite tungsten oxide nanoparticles can have a hexagonal crystal structure and have a particle diameter of 1nm~800nm. In addition, what should be noted is that this new type of agricultural plastic film of tungsten oxide nanopowder can block a certain amount of ultraviolet rays. And it can disinfect and sterilize, thereby reducing plant diseases.
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