Chemical Journal of Chinese Universities ›› 2014, Vol. 35 ›› Issue (6): 1277-1285.doi: 10.7503/cjcu20140021

• Physical Chemistry • Previous Articles     Next Articles

One-step Preparation of H3PW12O40/Bi2WO6 Nano-photocatalysts by Microwave Liquid Process and Its Photocatalysis Denitrification Properties

CHEN Ying1, XING Chen1, JI Shenglun1, LIANG Hongbao2,*(), ZHANG Hongyu3, CHEN Yan4   

  1. 1. Provincial Key Laboratory of Oil & Gas Chemical Technology, College of Chemistry & Chemical Engineering
    2. College of Mechanical Science & Engineering, Northeast Petroleum University, Daqing 163318, China
    3. Refinery of Daqing Petrochemical Company, Daqing 163711, China
    4. Daqing Logging & Testing Services Company, Daqing Oilfield Company Ltd., Daqing 163453, China
  • Received:2014-01-09 Online:2014-06-10 Published:2014-03-24
  • Contact: LIANG Hongbao E-mail:xchen3294@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51146008)

Abstract:

Immobilized nano-photocatalysts H3PW12O40/Bi2WO6 was prepared by microwave liquid one-step process. The morphology, structure and properties of the prepared catalysts were characterized and investigated by UV-Vis diffuse reflectance spectra, scanning electron microscopy(SEM), NH3 temperature programmed desorption(NH3-TPD), pyridine adsorption Fourier transform infrared spectroscopy(Py-FTIR) and X-ray diffraction(XRD), respectively. Their photocatalytic denitrification properties were evaluated by using the model oil with 15 mg/g pyridine. The results show that H3PW12O40/Bi2WO6 photocatalysts could be more efficiently synthesized by microwave liquid one-step process, and it could be excited by lower photon energy than that synthesized by common impregnation immobilization method. Immobilization of H3PW12O40 on Bi2WO6 could improve the acid content in Bi2WO6 nanoparticle surface, change the acid strength of Bi2WO6 precursor solution thereby controll the catalyst morphology. The influences of preparation conditions on photocatalytic properties of H3PW12O40/Bi2WO6 were investigated. It was found that H3PW12O40/Bi2WO6 nano-photocatalyst, with the H3PW12O40 loading(mass fraction) of 15%, prepared by microwave liquid one-step process under microwave power 800 W for 90 min possessed the best performance in the photocatalytic denitrification of model oil containing photocatalysts(mass ratio of catalyst to model oil was 1/300) after 500 W Xe lamp irradiation for 60 min, with the denitrification rate reached 92.63%.

Key words: Microwave, One-step, H3PW12O40, Bi2WO6, Photocatalysis, Denitrification

CLC Number: