Multi-walled carbon nanotube-tungsten oxide (MWCNT-WO₃) nanocomposites corresponding to different weight ratios of the two composite components MWCNT:WO₃ were prepared by using a facile synthesis procedure and tested as photocatalysts activated by UV light for degradation of synthetic methylene blue (MB) solution. The composites were characterized by XRD, TEM, SEM, FTIR, UV–VIS, PL and TGA. The average crystallite size of WO₃ calculated from XRD patterns was around 45 nm for all synthesized samples. TEM and SEM images confirmed the attachment of polyhedral WO₃ nanoparticles on the MWCNTs surface. TGA results showed an enhanced thermal stability of the MWCNT-WO₃ composites with increased content of WO₃. Photocatalytic experiments proved that the use of MWCNTs offered a notable increase of the photocatalytic performance of WO₃ in degradation of MB dye. The optimum MWCNT-W-7 composite exhibited 87 % MB degradation efficiency. The types of ROS generated by the composites were determined using EPR spectroscopy coupled with spin trapping technique. These results suggested that hydroxyl radicals were the main species involved in the photodegradation process of MB dye.

_{采用简便的合成方法制备了对应于两种复合组分MWCNT:WO 3}不同重量比的多壁碳纳米管-氧化钨（MWCNT-WO ₃ ）纳米复合材料，并作为紫外光活化光催化剂降解合成亚甲基进行了测试蓝色 (MB) 溶液。通过XRD、TEM、SEM、FTIR、UV-VIS、PL和TGA对复合材料进行了表征。对于所有合成样品，由 XRD 图案计算的 WO _{3的平均微晶尺寸约为 45 nm。}TEM和SEM图像证实了多面体WO ₃纳米颗粒在MWCNTs表面上的附着。TGA 结果表明，随着 WO 含量的增加，MWCNT-WO _{3复合材料的热稳定性增强3} . 光催化实验证明，MWCNTs的使用显着提高了WO ₃在降解MB染料中的光催化性能。最佳的 MWCNT-W-7 复合材料表现出 87% 的 MB 降解效率。使用 EPR 光谱结合自旋捕获技术确定复合材料产生的 ROS 类型。这些结果表明，羟基自由基是参与 MB 染料光降解过程的主要物质。