Abstract In this study, the photocatalytic activity of bismuth ferrite (BiFeO3) that is modified with Ni2+ to obtain BiFe1-xNixO3 (0 ≤ x ≤ 0.4 mol) is reported. The powders were synthesized by assisted high-energy ball milling. The X-ray diffraction (XRD) and Rietveld refinement demonstrate that Ni2+ cation is introduced in small quantities into the BiFeO3 crystal structure and occupies Fe3+ sites. The excess nickel transforms the BiFeO3 into sillenite (Bi25FeO40) and nickel ferrite (NiFe2O4) phases. The photocatalytic activities of the BiFe1-xNixO3 samples were compared to that of a commercial titanium dioxide (TiO2-P25) photocatalyst. Under irradiation in the UV–vis light spectrum, TiO2-P25 showed the highest photonic efficiency. The result was opposite when the samples were irradiated in the visible spectrum, where all the synthesized samples exhibited higher removal of crystal violet dye than those that were treated with the TiO2-P25. According to the results, all the modified materials are magnetically recoverable photocatalysts.

中文翻译：

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通过添加 Ni2+ 提高 BiFeO3 对水修复的光催化活性

摘要 在本研究中，报道了用 Ni2+ 改性获得 BiFe1-xNixO3 (0 ≤ x ≤ 0.4 mol) 的铁酸铋 (BiFeO3) 的光催化活性。粉末通过辅助高能球磨合成。X 射线衍射 (XRD) 和 Rietveld 精修表明 Ni2+ 阳离子以少量引入 BiFeO3 晶体结构并占据 Fe3+ 位点。过量的镍将 BiFeO3 转化为亚硒酸盐 (Bi25FeO40) 和镍铁氧体 (NiFe2O4) 相。将 BiFe1-xNixO3 样品的光催化活性与商业二氧化钛 (TiO2-P25) 光催化剂的光催化活性进行了比较。在紫外可见光谱的照射下，TiO2-P25 显示出最高的光子效率。当样品在可见光谱中照射时，结果相反，其中所有合成的样品表现出比用 TiO2-P25 处理的样品更高的结晶紫染料去除率。结果表明，所有的改性材料都是可磁回收的光催化剂。