Green Synthesized ZnO-Fe2O3-Co3O4 Nanocomposite for Antioxidant, Microbial Disinfection and Degradation of Pollutants from Wastewater
Biochemical systematics and ecology(2022)
摘要
Microbial resistance, industrial and agricultural wastes are the major concerning problems of today's world. Herein is a highly efficient incubated ZnO-Fe2O3-Co3O4 nanocomposite derived from Cordia myxa through a green chemistry approach. UV-visible spectroscopy (UV-Vis) was confirmed the peak on 508 and 387 with the energy bandgap of 2.2eV for I-NC. X-ray diffraction analysis (XRD) revealed the diffraction pattern of incubated nanocomposites (I-NC) that ZnO showed hexagonal, while Co3O4 and Fe2O3 showed cubic structure. SEM ana-lyses show the patterns comprising the crystal morphology of flower-ZnO, agglomerated Fe2O3 spongy rhom-bohedral Co3O4. The results of antibacterial activity show that the I-NC have a greater value of zone of inhibition (ZOI) against bacterial strains than NC, with the highest percentage in this trend P-aeruginosa94%>S-aureus91%>K-pneumonia89%>E-coli87%>P-vulgaris81%. The photocatalytic activity data showed that the Methy-lene Blue, Methyl Orange, Rhodamine-B, P-Nitroaniline, and Cresol Red dyes were degraded in the presence of I -NC catalysts after sunlight irradiation. The degradation efficiencies of I-NC show the trend Methylene Blue (99.98%) > P-Nitroaniline (99.97%) > Rhodamine-B (99.86%) > Cresol Red (99.80%) > Methyl Orange (99.6%). This study reported that the use of the Cordia myxa for the formulation of incubated nanocomposite could be employed as a novel antibacterial agent to inhibit bacterial growth and biofilm formation and photo -catalytic agent.
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关键词
Nanocomposites,Industrial wastes,Cordia myxa,Photocatalytic agent,Bacterial resistance,Antibiofilm
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