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Synthesis of magnetically removable photocatalyst based on bismuth doped YFeO_3

机译：基于铋掺杂YFEO_3的磁力去除光催化剂的合成

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摘要

We report the photocatalytic activity of Y_(1-x)Bi_xFeO_3 (0.1 ≤ x ≤ 0.5) powders under visible light irradiation, synthesized by assisted high-energy ball milling. X-ray diffraction (XRD) and Rietveld refinement, confirm the synthesis of pure bismuth doped yttrium orthoferrite for doped levels up to 30% mol. At higher doping levels, the orthoferrite phase transforms partially to garnet structure. The substitution of yttrium by bismuth changes the magnetic order, from antiferromagnetic to ferromagnetic, evaluated by means of vibrating sample magneto-metry (VSM), this behavior can be useful for its recovery. Band gap values around ～2 eV, obtained from UV-visible diffuse reflectance spectroscopy (DRS), show that the synthesized compounds absorb visible light. The synthesized materials show high photocatalytic degradation of methylene blue under visible light irradiation, regardless of bismuth content. Photo-Fenton experiments demonstrated an improvement in the photo-degradation. The bismuth doped YFeO_3 appears as a novel magnetically recoverable photocatalyst for water remediation.
机译：我们在可见光照射下报告Y_（1-x）Bi_xFeO_3（0.1≤x≤0.5）粉末的光催化活性，通过辅助高能球磨合成。 X射线衍射（XRD）和RIETVELD细化，证实纯铋掺杂钇镍铬镍的合成，掺杂水平高达30％摩尔。在较高的掺杂水平处，镍铬相的相位部分地变换为石榴石结构。通过铋替代钇改变磁性顺序，从反铁磁到铁磁，通过振动样品磁场（VSM）评估，这种行为可用于其恢复。 〜2eV的带隙值，从UV可见漫射反射光谱（DRS）中获得，表明合成的化合物吸收可见光。合成材料显示出可见光照射下的高光催化降解亚甲基蓝色，无论含量含量。光芬顿实验表明了光降解的改善。掺杂YFeO_3的铋作为水预析出的新型磁力可恢复的光催化剂。

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