Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (10): 1079-1086.DOI: 10.3724/SP.J.1077.2013.13043

• Research Paper • Previous Articles     Next Articles

Synthesis of Porous-Bi2WO6 and Its Photocatalytic Oxidative Desulfurization (Photo-ODS) Activity of Simulation Fuel

WANG Dan-Jun1, 2, YUE Lin-Lin1, GUO Li1, FU Feng1, XUE Gang-Lin2   

  1. (1. College of Chemistry & Chemical Engineering, Yan'an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an 716000, China; 2. College of Chemistry & Materials Science, Northwest University, Xi’an 710069, China)
  • Received:2013-01-17 Revised:2013-03-03 Published:2013-10-20 Online:2013-09-18
  • Supported by:

    National Natural Science Foundation of China (20973133); Natural Science Program of Education Department of Shaanxi Province (12JK0597); science and Technology Department of Shaanxi Province (2013k11-08); Key Industry Plan of Yan’an City(2011kg-13)

Abstract: Porous-Bi2WO6 was synthesized by a hydrothermal process. The phase composition, morphology, surface area/pore size distribution and optical properties of as-synthesized Bi2WO6 sample were investigated by X-ray diffraction (XRD), filed-scanning electron microscope (FE-SEM), transmission electron mcroscope (TEM), energy dispersive spectrometer (EDS), UV-Vis absorption spectrum (UV-Vis-DRS), and low-temperature N2 adsorption/desorption techniques. Furthermore, the photocatalytic oxidative desulfurization (Photo-ODS) activity of as-synthesized Bi2WO6 samples was also investigated. The experimental results reveal that reaction temperature and reaction time have a significant effect on the morphology and structure of Bi2WO6 under the strong acidic medium. After 2 h of reaction at 190℃, the as-obtained sample exhibits a novel nest-like 3D Bi2WO6 microcrystal with scales of 3-4 μm. HR-SEM reveals that the 3D nest-like Bi2WO6 microcrystal composes of many small secondary nanoplates. XRD and EDS results confirm that the as-synthesized D nest-like Bi2WO6 microcrystal is orthorhombic pure-Bi2WO6. N2 adsorption/desorption isotherms and the pore distribution result show that nest-like 3D Bi2WO6 microcrystal has pores in the size of 6-8 nm and the BET surface area is calculated to be as much as 17.49 m2/g. The photocatalytic experimental result illustrates that as-synthesized 3D nest-like porous Bi2WO6 microcrystals exhibit an excellent photocatalytic performance to photocatalytic oxidative desulfurization for simulated fuel oil under sun-like light irradiation. Under the conditions of 100 mL/min air flow, 1.2 g/L photocatalyst amount, and visible-light irradiation for 180 min, the desulfurization rate of simulated fuel oil reaches 91.2%, and the stability of photoctalyst is also good.

Key words: hydrothermal three-dimensional porous Bi2WO6, photocatalytic oxidation, desulfurization of simiulated fuel oil

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