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Synthesis, characterization, and application of nanohybrid formed by mixing carboxylated cellulose nanocrystal and zinc nitrate hexahydrate by precipitation method using Oxytenanthera abyssinica as raw material

Article scientifique 2022 Anglais

Résumé

Abstract In this study, cellulose from Oxytenanthera abyssinica was hydrolyzed to create carboxylated cellulose nanocrystals in a solution of citric acid and sulfuric acid. Afterward, nanohybrids were synthesized using carboxylated cellulose nanocrystals, zinc nitrate hexahydrate for photocatalytic degradation, and antibacterial and antioxidant properties. The experimental results were characterized using FTIR, XRD, SEM, and UV-Vis spectroscopy. Data from SEM, XRD, DLS, and FTIR spectra showed that ZnO nanoparticles were loaded on carboxylated CNC to form a nanohybrid of CNC/ZnO with mean nanoparticles size of 164.18 nm and size distribution between 94–351 nm. The data showed CNC/ ZnO nanohybrid had higher antibacterial, photocatalytic and antioxidant activities than CNC. The higher antibacterial activity was observed against both grams positive (Klebsiella pneumonia and Escherichia coli) and gram-negative bacteria (Staphylococcus epidermidis and Staphylococcus aureus) with an inhibition zone of 26.00±1.00 to 41.33±1.15 mm in comparison with Ciprofloxacin. The maximal amount of methylene blue photodegradation (about 91.52%) was seen after 75 minutes of exposure to a UV lamp. 53.151.03% DPPH radical scavenging actives with IC50 value of 117.66 µm/ml were obtained at 125 µm/ml concentration of CNC/ZnO sample. Biomedical and environmental applications of cellulose are limited by its extremely low antibacterial, photocatalytic, and antioxidant properties. Therefore, this study was done to enhance these properties by synthesizing a nanohybrid of cellulose nanocrystals from cellulose produced from Oxytenanthera abyssinica and ZnO inorganic salt.

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Worku, L., Bachheti, R., Tadesse, M., Bachheti, A. (2022). Synthesis, characterization, and application of nanohybrid formed by mixing carboxylated cellulose nanocrystal and zinc nitrate hexahydrate by precipitation method using Oxytenanthera abyssinica as raw material. https://doi.org/10.21203/rs.3.rs-2225634/v1

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Limenew Abate Worku Rakesh Kumar Bachheti Mesfin Getachew Tadesse Archana Bachheti

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