Tungsten Trioxide Carbon Nanotube Composite Films

The structure of carbon nanotubes is particularly a tube composed of a hexagonal network similar to graphite. The unique nano-hollow structure and closed helical structure with different topological configurations make it have a lot of special excellent properties. Such as good electrical conductivity, heat resistance, high mechanical strength, corrosion resistance, self-lubricating and biocompatibility, etc.

Tungsten trioxide was loaded on carbon nanotubes to prepare tungsten trioxide carbon nanotube composite films. The process includes:

Ordered carbon nanotubes (CNTs) films were drawn from the CNTs arrays of the pullable films, and the CNTs with the same multilayer orientation were laid on the 2cm x 5cm-sized scaffolds. Place the flat carbon nanotube film bracket on the container with W (ph) 6 and place it in a 2-inch tube oven. Then, the furnace is heated. When the temperature of the furnace rises to 300 ℃, the heating stops after 30 minutes to let the furnace cool naturally. When the temperature of the furnace drops to room temperature, the support is removed from the furnace and the core-shell structure composites of multi-layer tungsten oxide carbon nanotubes with the same orientation are obtained.

The tungsten trioxide carbon nanotube composite film material was used in electrochromic experiment. The solution was 1M HClO₄ solution, the working electrode was tungsten oxide carbon nanotube composite material, the reference electrode was Ag/AgCl electrode, and the platinum electrode was platinum plate. The WO₃/CNT composite film working electrode was applied - 1V voltage, and the film became blue. Adding 1V voltage, the film returns to its original state.

Tungsten trioxide carbon nanotube composite films can be substituted for expensive conductive substrates such as ITO and FTO, and have the characteristics of cost-saving, flexibility and translucency. In the preparation process, tungsten oxide crystal structure can be changed by adjusting temperature, and carbon nanotube films can be adjusted. Size structure adjusts the size and orientation of composites, thus realizing the production of large area composite films.

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