School of Physics and Materials Science, Shoolini University, Dist. Solan, Bajhol, HP, 173229, India.
Himalayan Centre of Excellence in Nanotechnology, Shoolini University, Dist. Solan, Bajhol, HP, 173229, India.
Environ Sci Pollut Res Int. 2023 Jun;30(28):71527-71542. doi: 10.1007/s11356-021-13147-7. Epub 2021 Mar 8.
The interference of industrial effluents such as dyes, surfactants, metals, polycyclic aromatic hydrocarbons, and pharmaceutical waste has become a severe global problem for human health due to their carcinogenic, mutagenic, and toxic properties. Ferrites were considered promising photocatalysts for the degradation of organic and inorganic dyes. This study mainly focused on improving the photocatalytic performance of MnFeO nanoferrites via doping of Zn and La ions. The zinc and lanthanum substituted MnZnLaFeO nanoferrites were prepared by the sol-gel auto-combustion technique for the degradation of organic textile malachite green dye (MGD) under the natural solar irradiation. The synthesized nanoferrites were investigated for their structural properties, surface morphology and elemental analysis, optical studies, magnetic properties, and photocatalytic performance by XRD, FESEM/EDX, FTIR/Raman spectrum, vibrating sample magnetometer, and UV-visible spectrophotometer, respectively. The substitution of zinc and lanthanum improved the photocatalytic efficiency of nanoferrites, and about 96% of MGD was degraded by MnZnLaFeO after 60 min of irradiation. The results showed the pseudo-first-order kinetics for dye degradation using undoped and Zn/La-doped MnFeO photocatalysts.
工业废水的干扰，如染料、表面活性剂、金属、多环芳烃和药物废物，由于其致癌、致突变和毒性特性，已成为人类健康的严重全球性问题。铁氧体被认为是降解有机和无机染料的有前途的光催化剂。本研究主要集中在通过掺杂 Zn 和 La 离子来提高 MnFeO 纳米铁氧体的光催化性能。通过溶胶-凝胶自燃烧技术制备了锌和镧取代的 MnZnLaFeO 纳米铁氧体，用于在自然光照射下降解有机纺织品孔雀石绿染料（MGD）。通过 XRD、FESEM/EDX、FTIR/Raman 光谱、振动样品磁强计和紫外可见分光光度计分别研究了合成纳米铁氧体的结构性能、表面形貌和元素分析、光学研究、磁性能和光催化性能。锌和镧的取代提高了纳米铁氧体的光催化效率，在照射 60 分钟后，MnZnLaFeO 降解了约 96%的 MGD。结果表明，使用未掺杂和 Zn/La 掺杂的 MnFeO 光催化剂进行染料降解符合准一级动力学。
