China Petroleum Processing & Petrochemical Technology ›› 2022, Vol. 24 ›› Issue (1): 59-67.

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Assembling Fe2O3/BiOCl Composite for Highly Effective Degradation of Water Pollutants under Visible-Light Irradiation

Liu Xiaoqing1,   

  • Received:2022-02-10 Revised:2021-07-28 Online:2022-03-30 Published:2022-03-30
  • Contact: Liu Xiaoqing E-mail:519800023@qq.com

Abstract: Fe2O3 was synthesized by the solvothermal method, and the synthesized Fe2O3 was added in the process of preparing BiOCl by hydrolysis, and then Fe2O3/BiOCl photocatalytic materials with different composite ratios were prepared. The optimal Fe2O3/BiOCl (1Fe/50Bi) sample showed a highest photocatalytic efficiency for cationic dyes (Rhodamine B) and anionic dye (methyl orange) degradation irradiated with visible light, as compared with that of a bare BiOCl catalyst. Meanwhile, radical capturing experiments indicated that the photo-induced holes (h+) is the main active species. X-ray powder diffraction and ultraviolet-visible diffuse reflectance spectroscopy were used to characterize the structural and optical properties, which proved that Fe2O3 was successfully composited to the BiOCl surface and effectively reduced the bandgap of BiOCl. More importantly, the optimal 1Fe/50Bi sample shows the highest photocatalytic efficiency for tetracycline (TC) degradation (98%) irradiated with visible light, as compared with that of a bare BiOCl catalyst. Consequently, the Fe2O3/BiOCl photocatalyst have potential applications in environmental purification.

Key words: Fe2O3, BiOCl, photocatalyst, composite