Abstract Carbon nanotubes (CNTs) are widely used in the preparation of composite functional materials with improved performance due to their unique electrical, mechanical properties and one-dimensional nanostructure. In this paper, the composite of TiO2 nanoparticles and acid-treated carbon nanotubes distributed on poly(methyl methacrylate) (PMMA) nanofibers was fabricated by sequential treatments of electrospinning, hydrothermal synthesis and freeze-drying. The resulting ternary composite of TiO2/CNTs/PMMA, which is featured with a specific surface area of 83.2 m2/g, effectively photodegraded a series of dyes, such as methyl blue, Rhodamine B, Sulforhodamine B and methyl orange (MO). In particular, complete degradation of MO (10 mg/L, 100 mL) was accomplished with TiO2/CNTs/PMMA (20 mg) in 40 min under UV irradiation. Moreover, the high photocatalytic activity of the ternary composite, which is superior to that of TiO2/PMMA, did not deteriorate during consecutive photodegradation tests up to ten runs. The photocatalytic mechanism of TiO2/CNTs/PMMA has been explored. The desirable high photocatalytic activity, excellent stability and easy recyclability of the ternary composite is attributed to the introduction of CNTs and the electrospun PMMA nanofiber support.

中文翻译：

---

TiO2纳米颗粒和碳纳米管负载在聚（甲基丙烯酸甲酯）纳米纤维上的复合材料：制备和光催化性能

摘要 碳纳米管（CNTs）由于其独特的电学、机械性能和一维纳米结构而被广泛用于制备性能提高的复合功能材料。在本文中，通过静电纺丝、水热合成和冷冻干燥的顺序处理，制备了分布在聚甲基丙烯酸甲酯 (PMMA) 纳米纤维上的 TiO2 纳米颗粒和酸处理的碳纳米管的复合材料。所得的 TiO2/CNTs/PMMA 三元复合材料的比表面积为 83.2 m2/g，可有效地光降解一系列染料，如甲基蓝、罗丹明 B、磺基罗丹明 B 和甲基橙 (MO)。特别是，在紫外线照射下，使用 TiO2/CNTs/PMMA（20mg）在 40 分钟内完成了 MO（10mg/L，100mL）的完全降解。而且，三元复合材料的高光催化活性优于 TiO2/PMMA，在连续 10 次的光降解测试中没有恶化。研究了TiO2/CNTs/PMMA的光催化机理。三元复合材料所需的高光催化活性、优异的稳定性和易回收性归因于碳纳米管和电纺 PMMA 纳米纤维载体的引入。