We studied the nucleation and growth of TiO₂ nanoflowers and carbon nanotubes-TiO₂ nanocomposite (n-CNT-TiO₂) by the hydrothermal method in a single step at 150 °C and tested them for the photocatalytic degradation of MB. The microstructural analysis confirmed the transformation of TiO₂ nanoflowers to CNT-TiO₂ spheres due to the role of surface energy of CNT. The XRD peak profile analysis of TiO₂ and n-CNT-TiO₂ confirmed the formation of pure rutile phase of Titania sintered at 400 °C. A red-shift in the bandgap of n-CNT-TiO₂ nanocomposite (2.7eV) was observed due to the donor states towards the conduction band edge. The core-level of XPS showed the strong interaction between carbon and titanium atoms. The CNT facilitate the interfacial charge transfer or avoid the formation of charge recombination due to the variation of Ti⁴⁺ to Ti³⁺ sites. The highest photocatalytic degradation was achieved by using the photocatalyst of n-CNT-TiO₂ nanocomposite. The incorporation of CNT provides the interfacial charge transfer facility that creates new interbands energy states for the delay of electron-hole recombination, which cater the environmental remediation.

我们在150°C下通过一步水热法研究了TiO ₂纳米花和碳纳米管-TiO ₂纳米复合材料（n-CNT-TiO ₂）的形核和生长，并测试了它们对MB的光催化降解。微观结构分析证实了由于CNT表面能的作用，TiO ₂纳米花转变为CNT-TiO ₂球。TiO ₂和n-CNT-TiO ₂的XRD峰轮廓分析证实了在400℃下烧结的二氧化钛的纯金红石相的形成。n-CNT-TiO ₂带隙中的红移由于施主态朝向导带边缘，因此观察到纳米复合材料（2.7eV）。XPS的核心水平显示出碳和钛原子之间的强相互作用。CNT有助于界面电荷转移或避免由于Ti ⁴⁺到Ti ³⁺位的变化而形成电荷复合。通过使用n-CNT-TiO ₂纳米复合材料的光催化剂可以实现最高的光催化降解。CNT的结合提供了界面电荷转移功能，可创建新的带间能态以延缓电子-空穴复合，从而满足环境修复的需要。