In this work, we have developed a magnetically recoverable Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite for the enhanced photocatalytic degradation of Methylene Blue (MB) dye. The Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite was prepared via a simple wet impregnation method and characterized using a wide range of characterization techniques to analyze the structural, photophysical, and magnetic properties. The photocatalytic activity of the as-prepared nanomaterials was evaluated against the MB dye under visible light exposure. Among the as-prepared photocatalyst samples, the magnetically recoverable Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite exhibited an excellent photocatalytic degradation efficiency of 97.15% against MB dye within 180 min time duration. The rate constant of the Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite is almost 2.25, 2.60, and 3.36 times higher than that of Bi₂Te₃, CdS, and CuFe₂O₄ nanoparticles, respectively. The Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite retained the effective photodegradation capability for five consecutive cycles. The ferromagnetic behavior of the Bi₂Te₃/CdS/CuFe₂O₄ nanocomposite was utilized for the easy recovery of the photocatalyst using an external bar magnet. The photocatalytic mechanism was proposed based on the generation of superoxide and hole radicals during MB dye degradation.

在这项工作中，我们开发了一种可磁回收的Bi ₂ Te ₃ / CdS / CuFe ₂ O ₄纳米复合材料，用于增强亚甲基蓝（MB）染料的光催化降解。通过简单的湿法浸渍法制备了Bi ₂ Te ₃ / CdS / CuFe ₂ O ₄纳米复合材料，并使用多种表征技术对其进行了表征，以分析结构，光物理和磁性能。在可见光照射下评估了所制备的纳米材料对MB染料的光催化活性。在制备的光催化剂样品中，可磁回收的Bi ₂ Te ₃/ CdS / CuFe ₂ O ₄纳米复合材料在180分钟的时间内对MB染料表现出极佳的光催化降解效率，为97.15％。Bi ₂ Te ₃ / CdS / CuFe ₂ O ₄纳米复合材料的速率常数分别比Bi ₂ Te ₃，CdS和CuFe ₂ O ₄纳米颗粒的速率常数高约2.25、2.60和3.36倍。Bi ₂ Te ₃ / CdS / CuFe ₂ O ₄纳米复合材料在五个连续循环中保持了有效的光降解能力。Bi ₂的铁磁行为Te ₃ / CdS / CuFe ₂ O ₄纳米复合材料用于利用外部棒状磁体轻松回收光催化剂。基于MB染料降解过程中超氧化物和空穴自由基的产生，提出了光催化机理。