Preparation of Highly Dispersed WO₃ Nanoparticles on Carbon Nanotubes and Application as Visible Photocatalyst

Tungsten oxide nanoparticles with high dispersion supported on carbon nanotube (CNT) templates were fabricated by the liquid phase method. Given the isolation effects of the network from CNT bundles, the nano-size H₂WO₄ and WO₃ can be obtained. The photodegradation ability of the WO₃/CNTs was evaluated by methylene blue (MB). The degradation rate of MB can reach 94.7% for 30 min, which is superior to that of pure WO₃ at 73.1% for 30 min. Furthermore, the degradation rate of the catalyst can reach 83.7% after recycling for five times, thus displaying the excellent stability of the photocatalyst. These results may be attributed to the highly dispersed WO₃ nanoparticles and the suppression of electron–hole recombination by CNT templates. This study proves that WO₃/CNT photocatalysts have potential applications in environmental and other related fields.