Effect of in situ Fe(II)/Fe(III)-doping on the visible light-Fenton-like catalytic activity of Bi/BiOBr hierarchical microspheres
作者： Xin Geng , Wentao Li , Feng Xiao , Dongsheng Wang , Lian Yang
DOI: 10.1039/C6CY02195F
关键词: Doping 、 Photochemistry 、 Spectroscopy 、 X-ray photoelectron spectroscopy 、 Absorption spectroscopy 、 Catalysis 、 Visible spectrum 、 Rhodamine B 、 Materials science 、 Radical
摘要: Novel Fe(II)/Fe(III) doped Bi/BiOBr (FBB) visible light photocatalysts with heterojunctions were successfully prepared by a facile solvothermal method. The as-prepared samples characterized via XRD, FESEM, XPS, UV-vis absorption spectroscopy and N2 adsorption–desorption. results demonstrate that Fe doping plays key roles in the transformation of amorphous to crystal phase for Bi metal nanoparticles increase specific surface areas FBB. degradation rhodamine B (RhB) was studied using FBB hydrogen peroxide (H2O2) under irradiation (λ = 420 nm); it found rate constant 0.2-FBB (Fe/Bi molar ratio 0.2) is 4-fold more than pure BiOBr. presence enhances Fenton-like reaction reduction Fe(III) Fe(II), producing holes hydroxyl radicals degrade RhB. This result confirmed ESR spectroscopy, H2O2 consumption Fe(II) concentration experiments. Radical scavenger experiments demonstrated active species follow order > radicals. After five cycles, retains stable catalytic activity.
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