Abstract

In this paper, the hydrothermal method was employed to synthesize TiO₂ nanobelts, which performed enhanced photocatalytic activity compared with TiO₂ nanoparticles. The structures, morphologies and surface chemical components of the as-prepared samples were systemically characterized, as well as the UV-Vis absorption properties. Also, the photocatalytic properties of the catalysts were evaluated through degrading MB dye under the simulated solar-driven irradiation. From the comparison, TiO₂ nanobelts sample behaved a better photocatalytic degradation of 20 mg/L MB solution within 120 min, more than 0.2 times of TiO₂ nanoparticles, which was attributed to more surface oxygen vacancies generated in TiO₂ nanobelts during their synthesis process. This finding enables TiO₂ nanobelts the feasibility to be used or to be constructed heterostructures applying in the field of water pollutant decontaminations.

摘要

在本文中，采用水热法合成了TiO ₂纳米带，与TiO ₂纳米颗粒相比，该纳米带具有更高的光催化活性。系统表征了所制备样品的结构、形态和表面化学成分，以及 UV-Vis 吸收特性。此外，还通过在模拟太阳能驱动下降解 MB 染料来评估催化剂的光催化性能。从比较来看，TiO ₂纳米带样品在 120 分钟内表现出更好的光催化降解 20 mg/L MB 溶液，是 TiO ₂纳米颗粒的0.2 倍以上，这归因于 TiO _{2 中}产生的更多表面氧空位纳米带在其合成过程中。这一发现使TiO ₂纳米带具有在水污染物净化领域中使用或构建异质结构的可行性。