Ganesan Subbulakshmi, Pathak Piyus Kumar, Ramesh M D, Ahmed Jahangeer, Verma Ankit, Kit Chan Choon, Lakshmaiya Natrayan, Jasrotia Rohit
School of Physics and Materials Science, Shoolini University, Solan, H.P., India.
Department of Chemistry and Biochemistry, School of Sciences, JAIN (Deemed to Be University), Bangalore, Karnataka, India.
Sci Rep. 2024 Dec 28;14(1):31051. doi: 10.1038/s41598-024-82273-2.
The industrial sector faces a significant challenge in finding the highly effective and efficient treatments for harmful dye-based color effluents. In this study, pure and cobalt doped barium hexaferrite of chemical formula, BaCoFeO (x = 0-0.06) are made via sol-gel auto-combustion (SC) methodology. These nano hexaferrite based catalysts are employed for the photodegradation of Congo Red (CR) pollutant. X-rays diffraction investigation confirms the creation of pristine M-type with a hexagonal structure for the prepared hexaferrites. Field emission scanning electron microscopy analysis shows the existence of the hexagonal-shaped grains with well-defined grain boundaries. The reduction in the band gap of prepared hexaferrites are observed with the cobalt doping which is helpful in enhancing the photocatalytic performance. The X-ray photoelectron spectroscopy examination verifies the oxidation states of all elements found in the fabricated specimens. From the photocatalytic measurements, it is observed that the CR dye attains the removal percentage of 87.90%, 90.73%, 91.86% and 94.88% for the BaFeO (x = 0.00), BaCoFeO (x = 0.02), BaCoFeO (x = 0.04), and BaCoFeO (x = 0.06) hexaferrites under the natural sunlight of two hours. In addition, the reusability potential of prepared hexaferrites is also studied over the six consecutive experimental cycles. The excellent photodegradation performance of the Co- doped barium M-type hexaferrites for the removal of CR dye makes them highly useful for the wastewater remediation.
工业部门在寻找高效且有效的有害染料基有色废水处理方法方面面临重大挑战。在本研究中，通过溶胶 - 凝胶自燃烧（SC）方法制备了化学式为BaCoFeO（x = 0 - 0.06）的纯相和钴掺杂的六铁酸钡。这些基于六铁酸钡纳米的催化剂用于刚果红（CR）污染物的光降解。X射线衍射研究证实了所制备的六铁酸钡形成了具有六方结构的原始M型。场发射扫描电子显微镜分析表明存在具有清晰晶界的六方形状晶粒。观察到随着钴掺杂，所制备的六铁酸钡的带隙减小，这有助于提高光催化性能。X射线光电子能谱检查验证了在制造样品中发现的所有元素的氧化态。从光催化测量结果可以看出，在两小时的自然阳光下，对于BaFeO（x = 0.00）、BaCoFeO（x = 0.02）、BaCoFeO（x = 0.04）和BaCoFeO（x = 0.06）六铁酸钡，CR染料的去除率分别达到87.90%、90.73%、91.86%和94.88%。此外，还研究了所制备的六铁酸钡在连续六个实验循环中的可重复使用潜力。钴掺杂的钡M型六铁酸钡对CR染料的优异光降解性能使其在废水修复中非常有用。
