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- Title
Facile Fabrication of ZnO Nanorods with Extremely Strong Photocatalytic Performance and Antibacterial Activity.
- Authors
Mohapatra, Bandita
- Abstract
Development of nanomaterials with strong antibacterial action and highly enhanced photocatalytic activity for water purification is of immense interest. ZnO nanorods, with extremely enhanced solar-driven photocatalytic performance and good antibacterial activity, have been fabricated by facile chemical route. The structural properties of the nanomaterial were thoroughly characterized by SEM, TEM, EDX, HRTEM, STEM-HAADF, elemental profiling, XRD and Raman spectroscopy, while the optical and photocatalytic properties were studied by UV-vis absorption spectroscopy. TEM and FESEM showed nanorods with average width and length as 80 nm and 178 nm. XRD showed wurtzite ZnO with 27 nm crystallite size. PL analysis of ZnO nanorods showed peaks at 415 nm, 439 nm, 499 nm and 561 nm. The fabricated ZnO nanorods exhibited extremely enhanced photocatalytic performance with very high rate constant of 0.201 min − 1 for degradation of organic pollutant MB in water under only 15 min of solar exposure. ZnO nanorods completely inhibited growth of Bacillus oceanisediminis and Escherichia coli at 500 μ g/mL and 700 μ g/mL, respectively. The origin of antibacterial behavior of ZnO nanorods against B. oceanisediminis and E. coli has been investigated using histidine for scavenging ROS, morphological change by SEM and agarose gel electrophoresis. Our results showed that ROS-induced oxidative stress damages cell wall, evident from SEM, and leads to fragmentation of DNA both of which contribute to the antibacterial action of ZnO nanorods. The tentative mechanism of extremely strong photodegradation performance of ZnO nanorods has also been proposed. ZnO nanorods were fabricated using facile co-precipitation using PVP as a capping agent in aqueous medium. ZnO nanorods exhibited extremely enhanced solar-driven photocatalytic performance for degradation of toxic organic pollutants in water and good antibacterial activity against Bacillus oceanisediminis and Escherichia coli. The synthesized ZnO nanorods are very promising for practical large scale solar-driven wastewater purification application.
- Subjects
PHOTOCATALYTIC water purification; NANORODS; ORGANIC water pollutants; ANTIBACTERIAL agents; ZINC oxide; PHOTODEGRADATION
- Publication
NANO, 2024, Vol 19, Issue 2, p1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292024500115