Abstract A novel Z-scheme photocatalyst BiFeO3/CuS/SiO2 was fabricated by hydrothermal technique and test for methyl orange photodegradation under visible light. 99% of methyl orange dye was degraded in 60 min which was higher than the photocatalytic activity of pristine BiFeO3 and CuS. OH and O2 were the main reactive species during degradation process. The formation of heterojunction promoted rate of electron hole pair separation, effective exploitation of visible light absorption and thus improved the photocatalytic activity. Besides, BiFeO3/CuS/SiO2 showed a significant recycling efficiency over six catalytic cycles.

中文翻译：

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制备可见光活性 BiFeO3/CuS/SiO2 Z 型光催化剂以有效降解染料

摘要 采用水热技术制备了一种新型Z型光催化剂BiFeO3/CuS/SiO2，并在可见光下进行甲基橙光降解试验。99% 的甲基橙染料在 60 分钟内被降解，这高于原始 BiFeO3 和 CuS 的光催化活性。OH和O2是降解过程中的主要反应物质。异质结的形成促进了电子空穴对分离的速率，有效利用了可见光吸收，从而提高了光催化活性。此外，BiFeO3/CuS/SiO2 在六个催化循环中表现出显着的回收效率。