Open AccessPREPARATION OF TEMPO-CELLULOSE NANOFIBER/ZINC OXIDE AS ANTIMICROBIAL AND METHYLENE BLUE PHOTO-DEGRADING NANOCOMPOSITE
Author(s) -
Mohamed ElSakhawy,
Ahmed Salama,
Ahmed K. ElZiaty,
Hazem Hassan
Publication year - 2021
Publication title -
cellulose chemistry and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.302
H-Index - 32
eISSN - 2457-9459
pISSN - 0576-9787
DOI - 10.35812/cellulosechemtechnol.2021.55.35
Subject(s) - methylene blue , nanocomposite , chemistry , zinc , cellulose , catalysis , photocatalysis , visible spectrum , nuclear chemistry , nanofiber , chemical engineering , organic chemistry , materials science , optoelectronics , engineering
"Photo-catalytic degradation of organic dyes in aquatic environments under visible light irradiation affords an efficientand economic technique for environmental remediation. TEMPO-oxidized cellulose nanofibers/zinc oxidenanocomposite (TEMPO-CNF/ZnO) was prepared through oxidation of cellulose pulp, followed by zinc oxideprecipitation in the presence of oxidized fibers. TEMPO-CNF/ZnO was characterized by different techniques. Thedegradation rate of methylene blue (MB) by TEMPO-CNF/ZnO was gradually increased with increasing pH and thedegradation reached 86% within 340 minutes at pH 7. The kinetic study showed that the pseudo-first-order kinetic bestfitted the photo-catalytic process. A mechanism was proposed for the degradation of MB using TEMPO-CNF/ZnOunder visible light irradiation. TEMPO-CNF/ZnO showed high antibacterial activity against S. aureus and E. coli.Thus, the TEMPO-CNF/ZnO nanocomposite has been demonstrated to be an effective photo-catalytic material fordegrading MB under visible light irradiation."