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Citation: ZHAI Xiao-Hui, LONG Hui-Jin, DONG Jiang-Zhou, CAO Ya-An. Doping Mechanism of N-TiO₂/ZnO Composite Nanotube Arrays and Their Photocatalytic Activity[J]. Acta Physico-Chimica Sinica, ;2010, 26(03): 663-668. doi: 10.3866/PKU.WHXB20100317 shu

Doping Mechanism of N-TiO₂/ZnO Composite Nanotube Arrays and Their Photocatalytic Activity

1.
College of Physics, Nankai University, Tianjin 300071, P. R. China; Teda Applied Physics School, Nankai University, Tianjin 300457, P. R. China

Received Date: 19 August 2009
Available Online: 26 January 2010

TiO2/ZnO and N-doped TiO2/ZnO composite nanotube arrays were synthesized by the sol-gel method using ZnOnanorod arrays as a template. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and diffuse reflectance UV-Vis spectroscopy (UV-Vis) were used to characterize the samples. The nanotubes had a uniform hexa nal shape. The diameter and wall thickness of the nanotubes were about 100 nm and 20 nm, respectively. Some N dopants were substitutionally doped into the TiO2 lattice, while the N-Ox, N-C, and N-N were chemically absorbed onto the surface of the TiO2/ZnO composite nanotubes. Dopant-induced narrowing of the bandgap resulted from the doping of N ions into the TiO2 lattices. The surface N species enhanced the visible-light response and promoted the separation of photogenerated carriers. Compared with the TiO2/ZnO composite nanotube arrays, the N-TiO2/ZnO composite nanotube arrays exhibited higher photocatalytic activity.
- Photocatalysis,
- TiO2/ZnO composite nanotube array,
- N doping,
- Doping mechanism
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沈阳化工大学材料科学与工程学院沈阳 110142

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Doping Mechanism of N-TiO2/ZnO Composite Nanotube Arrays and Their Photocatalytic Activity

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通讯作者: 陈斌, bchen63@163.com

Doping Mechanism of N-TiO₂/ZnO Composite Nanotube Arrays and Their Photocatalytic Activity