School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India.
School of Physics and Materials Science, Shoolini University, Bajhol, Solan, H.P., India; Himalayan Centre of Excellence in Nanotechnology, Shoolini University, Bajhol, Solan, H.P., India.
Environ Res. 2023 Aug 15;231(Pt 1):116103. doi: 10.1016/j.envres.2023.116103. Epub 2023 May 11.
Copper and dysprosium doped NiFeO magnetic nanomaterials, NiCuDyFeO (x = y = 0.00, 0.01, 0.02, 0.03), was prepared by utilizing sol-gel auto-combustion approach to inspect the photodegradation of methylene blue (MB) pollutant and also, to perform the electrocatalytic water splitting and antibacterial studies. The XRD analysis reveal the growth of a single-phase spinel cubic structure for produced nanomaterials. The magnetic traits show an increasing trend in saturation magnetization (M) from 40.71 to 47.90 emu/g along with a decreasing behaviour of coercivity from 158.09 to 156.34 Oe at lower and higher Cu and Dy doping content (x = 0.0-0.01). The study of optical band gap values of copper and dysprosium-doped nickel nanomaterials decreased from 1.71 to 1.52 eV. This will increase the photocatalytic degradation of methylene blue pollutant from 88.57% to 93.67% under natural sunlight, respectively. These findings clearly show that under natural sunlight irradiation for 60 min, the produced N4 photocatalyst displays the greatest photocatalytic activity with a maximum removal percentage of 93.67%. The electrocatalytic characteristics of produced magnetic nanomaterials for both HER and OER were examined with a Calomel electrode taking as a reference in a 0.5 N HSO and 0.1 N KOH electrolyte. The N4 electrode demonstrated considerable 10 and 0.024 mA/cm of current density, with onset potentials of 0.99 and 1.5 V for HER and OER and also, have tafel slopes of 58.04 and 295 mV/dec, respectively. The antibacterial activity for produced magnetic nanomaterials was examined against various bacteria (Bacillus subtilis, Staphylococcus aureus, S. typhi, and P. aeruginosa) in which N3 sample produced significant inhibition zone against gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) but no zone of inhibition against gram-negative bacteria (S. typhi and P. aeruginosa). With all these superior traits, the produced magnetic nanomaterials are highly valuable for the wastewater remediation, hydrogen evolution, and biological applications.
铜和镝掺杂的 NiFeO 磁性纳米材料，NiCuDyFeO（x=y=0.00、0.01、0.02、0.03），通过利用溶胶-凝胶自燃烧法制备，以研究亚甲基蓝（MB）污染物的光降解，以及进行电催化水分解和抗菌研究。XRD 分析表明，所制备的纳米材料呈现单相尖晶石立方结构的生长。磁性特性表明，在较低和较高的 Cu 和 Dy 掺杂含量（x=0.0-0.01）下，饱和磁化强度（M）从 40.71 增加到 47.90 emu/g，矫顽力从 158.09 减小到 156.34 Oe。研究铜和镝掺杂镍纳米材料的光学带隙值从 1.71 减小到 1.52 eV。这将分别提高亚甲基蓝污染物在自然光下的光催化降解率从 88.57%到 93.67%。这些发现清楚地表明，在自然光照射 60 分钟下，所制备的 N4 光催化剂显示出最大的光催化活性，最大去除率为 93.67%。在 0.5 N HSO 和 0.1 N KOH 电解质中，以甘汞电极为参比电极，对所制备的磁性纳米材料的 HER 和 OER 的电催化特性进行了研究。N4 电极表现出相当的 10 和 0.024 mA/cm 的电流密度，HER 和 OER 的起始电位分别为 0.99 和 1.5 V，并且具有 58.04 和 295 mV/dec 的塔菲尔斜率。所制备的磁性纳米材料对各种细菌（枯草芽孢杆菌、金黄色葡萄球菌、伤寒沙门氏菌和铜绿假单胞菌）的抗菌活性进行了研究，其中 N3 样品对革兰氏阳性菌（枯草芽孢杆菌和金黄色葡萄球菌）产生了显著的抑制区，但对革兰氏阴性菌（伤寒沙门氏菌和铜绿假单胞菌）没有抑制区。具有所有这些优异的特性，所制备的磁性纳米材料在废水修复、氢气产生和生物应用方面具有很高的价值。
