One-step Flame-assisted Pyrolysis Synthesis of Fe Doped Carbon Incorporated TiO2 and Its Photocatalytic Activity

doi:10.7503/cjcu20130314

Abstract

Abstract:

Fe doped carbon incorporated TiO₂ was synthesized with a simple and facile one-step flame-assisted pyrolysis method and its photocatalytic properties were characterized by degradation of methylene blue(MB). The morphology, components, crystalline structure and absorbance of as-prepared samples were characterized by SEM, EDX, XPS, XRD and UV-Vis DRS, respectively. EDX and XPS results show that Fe³⁺ was introduced into TiO₂ lattice by substituting Ti⁴⁺. XRD patterns reflect that mainly anatase TiO₂ was obtained directly without any annealing. The absorbance edges show red shifts, and absorbance of visible light enlarge with increasing Fe amount, indicating the narrowed optical band gap with the introduce of impurity energy levels. SEM results show that the uniform micro spherical shapes of carbon incorporated TiO₂ were damaged with the introduction of Fe. The promoted photocatalytic activity of samples for the degradation of MB was observed under both visible light and UV-Vis light irradiation with Fe doping not more than 0.2%. The highest photocatalytic degradation rate for MB was observed for the sample with 0.1%(molar fraction) Fe. The photocatalytic activity decreased when the Fe doping amount reached to 0.3%.

Key words: Flame-assisted pyrolysis, Fe doping, Carbon incorporation, TiO₂, Photocatalytic activity

CLC Number:

O644
O614.41

TrendMD:

CHEN Xi, LI Hui, SUN Tong, CUI Xiao-Li. One-step Flame-assisted Pyrolysis Synthesis of Fe Doped Carbon Incorporated TiO₂ and Its Photocatalytic Activity[J]. Chem. J. Chinese Universities, 2013, 34(12): 2855.

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One-step Flame-assisted Pyrolysis Synthesis of Fe Doped Carbon Incorporated TiO₂ and Its Photocatalytic Activity

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