Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (3): 503.doi: 10.7503/cjcu20120849

• Article: Inorganic Chemistry • Previous Articles     Next Articles

Synthesis of CuMgAl Layered Double Hydroxides for Efficient Photocatalysis of Rhodamine B

NI Zhe-Ming, XUE Ji-Long   

  1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2012-09-17 Online:2013-03-10 Published:2013-02-18


CuMgAl layered double hydroxides CuMgAL-LDHs with different Cu/Mg/Al molar ratios have been successfully synthesized by the coprecipitation method. The structure and properties of the CuMgAL-LDHs photocatalysts were characterized by X-ray diffraction(XRD), inductively coupled plasma(ICP) and Fourier transform infrared(FTIR) spectra. The results show that the photocatalytic activity of layered double hydro-xides(LDHs) can be improved with the metal cations of appropriate proportion and species incorporated in octahedral layers of LDHs. The degradation rate with a fixed CuMgAl-LDHs dose of 3 g/L was found to be 85.2% among which the ratio of photocatalytic degradation to total degradation is over 50%, when temperature and pH were 13 ℃ and 7.84, respectively. Meanwhile, it is discovered that the pseudo-second-order kinetic equation best describes the photocatalytic kinetics of Rhodamine B on CuMgAl-LDHs.

Key words: Layered double hydroxides(LDHs), Photocatalysis, Rhodamine B(RhB), Kinetics

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