Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (3): 737-744.doi: 10.3866/PKU.WHXB201512184

• ARTICLE • Previous Articles     Next Articles

Structural Features and Photocatalytic Performance of TiO2-HNbMoO6 Composite

Li-Fang HU1,2,Jie HE1,*(),Yuan LIU1,Yun-Lei ZHAO1,Kai CHEN1   

  1. 1 School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui Province P. R. China
    2 School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, Anhui Province P. R. China
  • Received:2015-11-09 Published:2016-03-04
  • Contact: Jie HE E-mail:jhe@aust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21271008);National Training Programs of Innovation and Entrepreneurship for Undergraduates, China(AH201410361062)

Abstract:

A novel composite material TiO2-HNbMoO6 was prepared by an intercalation-pillar route. The phase and its microstructure, skeleton feature, spectral-response characteristics, and the interaction between interlayer species and nanosheets were characterized using powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), laser Raman spectroscopy (LRS), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and H2 temperature-programmed reduction (H2-TPR). The specific surface areas of the samples were measured by N2 adsorption-desorption isotherms. The synergistic effect between the host and the guest of the composites was evaluated by the degradation of methylene blue (MB) dye under simulated sunlight. The results, such as the increase of the d-spacing, the absence of TiO2 crystalline phase, and the change of the Nb―O bond in the main body and the Ti―O bond in TiO2 before and after composition, demonstrate that TiO2 is uniformly dispersed in the interlayer of HNbMoO6, indicating the interaction between the host laminates and the guest titanium oxide species. The specific surface area of the composite was four times that of its host material, the narrowing band gap, the better adsorption ability, and the superior photocatalytic activity of TiO2-HNbMoO6 were because of the synergistic effect between the host and the guest.

Key words: HNbMoO6, TiO2, Composite structure, Photocatalysis, Synergistic effect

MSC2000: 

  • O649