Abstract：N doped TiO₂nano-particles-palygorskite composite materials were prepared by method of hydrolyze-depositing. UV-Vis spectrometer was applied to characterize the absorption spectra and the band gap of the composite materials. Combining with FTIR and XPS test, the form and mechanism of N-doping were analyzed. The results show that N is doped into the composite materials by the forms of TiN,NHxand NO_x. The band gap of the composite materials decreases 0.58 eV. The threshold of absorbable light wavelength is approved by 105.35 nm.

Keywords：TiO₂ nano-particle; palygorskite; doping; composite materials; absorption spectrum