Institute of Chemistry and Materials, Nghia Do, Cau Giay, Hanoi, Vietnam.
School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam.
J Hazard Mater. 2021 Oct 15;420:126636. doi: 10.1016/j.jhazmat.2021.126636. Epub 2021 Jul 13.
The quest for finding an effective photocatalyst for environmental remediation and treatment strategies is attracting considerable attentions from scientists. In this study, a new hybrid material, CuMgFeO-TiO, was designed and fabricated using coprecipitation and sol-gel approaches for degrading organic dyes in wastewater. The prepared hybrid materials were fully characterized using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The results revealed that the CuMgFeO-TiO hybrid material was successfully synthesized with average particle sizes of 40.09 nm for TiO and 27.9 nm for CuMgFeO. As the calculated bandgap energy of the hybrid material was approximately 2.86 eV, it could harvest photon energy in the visible region. Results indicate that the CuMgFeO-TiO also had reasonable magnetic properties with a saturation magnetization value of 11.2 emu/g, which is a level of making easy separation from the solution by an external magnet. The resultant CuMgFeO-TiO hybrid material revealed better photocatalytic performance for rhodamine B dye (consistent removal rate in the 13.96 × 10 min) compared with free-standing CuMgFeO and TiO materials. The recyclability and photocatalytic mechanism of CuMgFeO-TiO are also well discussed.
寻找一种有效的光催化剂用于环境修复和处理策略的研究引起了科学家们的极大关注。在这项研究中，我们采用共沉淀和溶胶-凝胶法设计并制备了一种新型的复合光催化剂 CuMgFeO-TiO，用于降解废水中的有机染料。通过扫描电子显微镜、X 射线衍射、傅里叶变换红外光谱和 X 射线光电子能谱对制备的复合光催化剂进行了全面的表征。结果表明，CuMgFeO-TiO 复合光催化剂成功合成，TiO 的平均粒径为 40.09nm，CuMgFeO 的平均粒径为 27.9nm。由于该复合光催化剂的计算能带隙能量约为 2.86eV，它可以在可见光区域吸收光子能量。结果表明，CuMgFeO-TiO 还具有合理的磁性能，饱和磁化强度值为 11.2emu/g，这使其易于通过外部磁场从溶液中分离。与独立的 CuMgFeO 和 TiO 材料相比，制备的 CuMgFeO-TiO 复合光催化剂对罗丹明 B 染料具有更好的光催化性能（一致去除率为 13.96×10min）。此外，还对 CuMgFeO-TiO 的可回收性和光催化机理进行了讨论。
