Abstract
A facile and environmentally friendly surface-ion adsorption method using CeCO&sub3;OH@C as template was demonstrated to synthesize CeO&sub2;-LaFeO&sub3; perovskite composite material. The obtained composite was characterized by X-ray diffraction (XRD), fourier transform infrared spectra (FT-IR), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), thermo-gravimetric analysis and differential scanning calorimetry (TG-DSC), N&sub2; adsorption/desorption isotherms and X-ray photoelectron spectra (XPS) measurements. The catalytic degradation of nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) was tested to evaluate catalytic activity of the CeO&sub2;-LaFeO&sub3; composite. Much better activity was observed for the CeO&sub2;-LaFeO&sub3; composite comparing with CeO&sub2; and LaFeO&sub3;. These results suggested that perovskite composite materials are a promising candidate for the degradation of tobacco-specific nitrosamines (TSNAs).