Synthesis, Characterization and Application of Zinc Oxide Nanoparticles for Textile Materials against Ultra Violet Radiation

Authors : Bulcha Bekele; Gemechu Berhanu; Desalegn Shiferaw

Volume/Issue : Volume 6 - 2021, Issue 1 - January

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Nanoparticles are a part of nanotechnology with the dimension of 1nm-100m. The aim of this paper is to synthesis, characterizations, compares the treated and untreated cotton textiles. Zinc oxide nanoparticles (ZnONPs) were synthesized by sol-gel method from zinc acetate dehydrate (Zn(CH3COO)2.2H2O), zinc sulphate heptahydrate (ZnSO4.7H2O) and zinc nitrate hexahydrate Zn (NO3)2.6H2O as a precursor with sodium hydroxide and polyvinyl alcohol concentration at the same annealing temperature of 4000C. The synthesized ZnONPs were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and UV/vis spectroscopy. The X-RD results, revealed that the synthesized nanoparticles has wurtzite hexagonal structure with the average particle size of 44±50nm, 42±30nm, 30±32nm from zinc nitrate hexahydrate and polyvinyl alcohol concentration (S1), zinc acetate and sodium hydroxide (S2), zinc sulphate heptahydrate and sodium hydroxide (S3) samples respectively. The SEM images of synthesized ZnONPs using S1 sample was flower in shape and spherical for S2 and S3. The results, obtained from SEM are agreed with that of XRD. The UV/vis absorption peaks were observed at 350nm and 390nm using S1, 378nm and 380nm using S3 and S3 and exhibits 3.536ev, 3.274ev, and 3.257ev energy band gap using S1, S2, and S3 respectively. The energy band-gap of ZnONPs was blue-shifted by the effect of quantum confinement when compared with bulk ZnO. The peaks observed from UV/vis absorption were due to electronic transition from valiancy band to conduction band. The synthesized ZnONPs were applied on cotton textiles to impart sunscreen activity of treated cotton textiles. The effectiveness of treatment was assessed using UV/vis spectroscopy. The ultraviolet protection factors (UPF) and percent of transmissions (%T) found to be good ultraviolet radiation blockers. Treated cotton textiles reduce the harm full impacts of UV radiations on human skin.

Keywords : Characterization; Synthesis; Textiles; UVRadian; ZnONPs.


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