Abstract A simple synthesis route is presented to obtain single BiFeO3 and mixed BiFeO3/Fe2O3/Bi2Fe4O9 photocatalysts. The obtained samples were characterized to analyze their structural, magnetic, optical and physical–chemical properties. The role of additional phases, i.e. Bi2Fe4O9 and Fe2O3 in the BiFeO3 structure, was analyzed by investigating sunlight-driven water oxidation and degradation of different dye pollutants. The achieved results suggest formation of BiFeO3/Fe2O3/Bi2Fe4O9 heterojunction-like interfaces, that induce lower e−/h+ recombination rate, thus enhancing photoactivity than bare BiFeO3. Additionally, BiFeO3/Fe2O3/Bi2Fe4O9 has exclusive feature of being magnetically separated from treated media and its stability was demonstrated for at least 3 cycles of dye degradation.

中文翻译：

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用于太阳能光驱动水氧化和染料污染物降解的单一 BiFeO 3 和混合 BiFeO 3 /Fe 2 O 3 /Bi 2 Fe 4 O 9 铁磁光催化剂

摘要 提出了获得单一BiFeO3和混合BiFeO3/Fe2O3/Bi2Fe4O9光催化剂的简单合成路线。对获得的样品进行表征以分析其结构、磁性、光学和物理化学性质。通过研究阳光驱动的水氧化和不同染料污染物的降解，分析了附加相，即 Bi2Fe4O9 和 Fe2O3 在 BiFeO3 结构中的作用。取得的结果表明形成了 BiFeO3/Fe2O3/Bi2Fe4O9 异质结样界面，诱导较低的 e-/h+ 复合率，从而比裸 BiFeO3 提高光活性。此外，BiFeO3/Fe2O3/Bi2Fe4O9 具有与处理过的介质磁性分离的独特特性，并且其稳定性至少在染料降解的 3 次循环中得到证明。