Abstract Multi-walled carbon nanotubes-titanium dioxide (MWCNTs-TiO2) nanocomposites were synthesized via microwave-assisted synthesis and conventional hydrothermal method, comprising of well-crystallized anatase TiO2 nanoparticles with different MWCNTs contents. TiO2 nanoparticles synthesized by the rapid thermal decomposition of tetra-butyl titanium (Ti(OC4H9)4) in the presence of acid treated MWCNTs, were attached on the surface of MWCNTs by means of chemical bonds under microwave irradiation. The addition of MWCNTs did not influence the structure of anatase TiO2. The photocatalytic performance evaluation of composite materials was conducted under UV and visible light using methyl orange (MO) as a typical pollutant. The enhancement in photocatalytic efficiency of nanocomposites was clearly observed by the presence of MWCNTs, which could contribute to improve the adsorption of MO dye, absorption of more light and also obstruct the photogenerated electron-hole pair's recombination.

中文翻译：

---

MWCNTs/TiO2 纳米复合材料的光催化性能：传统与微波辅助合成

摘要 通过微波辅助合成和常规水热法合成了多壁碳纳米管-二氧化钛（MWCNTs-TiO2）纳米复合材料，包括具有不同MWCNTs含量的结晶良好的锐钛矿TiO2纳米颗粒。在酸处理的 MWCNTs 存在下，通过四丁基钛 (Ti(OC4H9)4) 的快速热分解合成的 TiO2 纳米颗粒在微波辐射下通过化学键附着在 MWCNTs 的表面。MWCNTs的加入不影响锐钛矿TiO2的结构。以甲基橙（MO）为典型污染物，在紫外光和可见光下对复合材料的光催化性能进行评估。通过 MWCNTs 的存在，可以清楚地观察到纳米复合材料光催化效率的提高，