Enhanced Photocatalytic Activity by Cu2O Nanoparticles Integrated H2Ti3O7 Nanotubes for Removal of Mercaptan

作者：Chunli Guo, Lei Xu, Jie He, Lifang Hu, Bin Wang, Liangguo Da · 发表于：NANO · 年份：2017 · DOI：10.1142/s1793292017500758 · 被引用次数：19 · 研究领域：Advanced Photocatalysis Techniques、Copper-based nanomaterials and applications、Gas Sensing Nanomaterials and Sensors

The Cu 2 O@H 2 Ti 3 O 7 nanocomposite was prepared through a facile hydrothermal method. The as-prepared samples were investigated by powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), laser Raman spectroscopy (LRS), N 2 adsorption-desorption measurements and UV-Vis diffuse reflection spectroscopy (UV-Vis–DRS). The photocatalytic performance of the as-prepared Cu 2 O@H 2 Ti 3 O 7 nanocomposite is evaluated by the oxidation of ethyl mercaptan (EM) under sunlight irradiation. The results indicate that the Cu 2 O nanoparticles are integrated uniformly on H 2 Ti 3 O 7 nanotubes, and the absorption edge of the nanocomposite has obviously shifted to visible light region compared to H 2 Ti 3 O 7 nanotubes. There is an obvious synergistic effect existing between the dispersed Cu 2 O nanoparticles and H 2 Ti 3 O 7 nanotubes, and the Cu 2 O@H 2 Ti 3 O 7 composite shows stronger visible spectral response and wider absorbance. Then, an enchanced photodegradation activity is obtained for the removal of EM under sunlight irradiation compared to its precursors.