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Synthesis of diamagnetic ZnO nano-crystallites via sol-gel method and their photocatalytic activity

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Title Synthesis of diamagnetic ZnO nano-crystallites via sol-gel method and their photocatalytic activity
 
Creator Kumar, Deepak
Mehata, Mohan Singh
 
Subject Zinc oxide
Photoluminescence
Synthesis
Photocatalytic activity
Diamagnetic behavior
Scavenged
 
Description 437-444
The diamagnetic zinc oxide (ZnO) nano-crystallites were synthesized via the sol-gel method. The X-ray diffraction
(XRD) and field emission scanning electron microscope (FESEM) were used for structural characterization. The XRD
pattern demonstrates that the ZnO nanoparticles (NPs) have a wurtzite structure with an average crystallite size of ~20 nm.
TheFESEM and EDAX (energy- dispersive x-ray analysis) confirm the particles are in granular, spherical, and rod-like
mixed-phase. The absorption spectra show a red shift and observed bandgap energy of about 3.17 eV, which might attribute
because of the oxygen vacancies. Further, photoluminescence (PL) exhibits dual peaks at wavelengths 430 and
550 nm, which maybe due to defects induced at the surface of the NPs. The vibrating sample magnetometer (VSM) study
demonstrates the diamagnetic behavior of zinc oxide nanoparticles at 300 K. The photocatalytic effectiveness of the ZnO
NPs was examined by decomposing a congo red (CR) dye as an organic water pollutant under UV irradiation. The leading
absorption peak of CR dye decreases with the UV irradiation time. The complete decolorization of the CR dye was observed
after 150 min with the reaction rate constant of 0.018 min-1.
 
Date 2022-08-16T06:02:54Z
2022-08-16T06:02:54Z
2022-08
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscpr.res.in/handle/123456789/60287
https://doi.org/10.56042/ijems.v29i4.48695
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEMS Vol.29(4) [AUG 2022]