Preparation of Fe³⁺ doped Bi₂₄O₃₁Cl₁₀ by modified solution combustion method and its photocatalytic properties

Abstract

Fe-Bi24O31Cl10 photocatalytic materials were prepared by modified solution combustion method using bismuth nitrate, citric acid, ammonium chloride and ferric nitrate as raw materials. The influence of Fe3+ doping on its photocatalytic performance was evaluated by degrading rhodamine B in visible light.XRD,XPS,UV-vis, SEM,HTEM and FT-IR were used to study the effects of different Fe3+ doping amount on the phase, elemental valence, optical absorption performance, microscopic morphology and particle distribution, crystal surface spacing and chemical structure composition of Bi24O31Cl10.The results show that doped Fe3+ does not change the phase and morphology of Bi24O31Cl10, but its sheet size is obviously smaller, its thickness is thinner, its optical absorption property is enhanced, and the photoelectron hole recombination ratio is decreased. Compared with pure Bi24O31Cl10, Fe3+ doping can significantly improve the photocatalytic activity of Bi24O31Cl10.The photocatalytic activity of Bi24O31Cl10 is the highest when the doping amount of Fe3+ is 0.5% (mole fraction), and the decolorization rate of RhB is 75% when exposed to visible light for 50 min, which is 44% higher than that of pure Bi24O31Cl10.

Keywords

• bi₂₄o₃₁cl₁₀
• modified solution combustion method
• fe³⁺ doping
• rhb
• photocatalysis