Multifunctional cellulose nanocrystal /metal oxide hybrid, photo-degradation, antibacterial and larvicidal activities. (15th February 2020)

• Record Type: Journal Article
• Authors: Elfeky, Ahmed S.; Salem, Salem S.; Elzaref, Ahmed S.; Owda, Medhat E.; Eladawy, Hassan A.; Saeed, Ahmed M.; Awad, Mohamed A.; Abou-Zeid, Ragab E.; Fouda, Amr
• Is Part Of: Carbohydrate polymers. Volume 230(2020)
• Publication Date: 2020-02-15
• Subjects: Cellulose nanocrystal -- ZnO/CuO nanocomposite -- Hybrid CNC/ZnO/CuO nanocomposite -- Photo-degradation -- Antibacterial -- Larvicidal; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2019.115711
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: CNC, ZnO/CuO and hybrid CNC/ZnO/CuO nanostructures were synthesized and characterized. Nanostructures were characterized by TEM, SEM, EDX, XRD, FT-IR and XPS. Hybrid nanostructure exhibited higher photocatalytic activity towards dye degradation. Hybrid CNC/ZnO/CuO nanostructure have greater antibacterial and larvicidal activities. Hybrid nanostructure achieved better larvicidal activity against malaria vector. Integrating CNC into nanostructures has increased its activities. Abstract: Cellulose nanocrystal (CNC) and ZnO/CuO nanostructure were successfully synthesized by acid hydrolysis and sol-chemical methods, respectively. For the first time, CNC was used as a host polymer for synthesis of CNC/ZnO/CuO through In-situ solution casting technique. Morphological and structural of CNC, ZnO/CuO and hybrid CNC/ZnO/CuO were investigated by TEM, SEM-EDX, FT-IR, XRD and XPS analyses. The analysis revealed that, poly-dispersed, smooth and rod like CNC with an average length of ∼ 85.4 nm, average diameter of ∼13.9 nm and surface charge of 0.01 mmol/gm. As well, irregular shapes as hexagonal, spherical and cluster or star like of ZnO/CuO were formed. EDX and XRD spectra exhibited highly purified CNC/ZnO/CuO and pointed to cellulose II crystallite form with a monoclinic structure. The results demonstrated that, 91.3 % and 99.7 % dye degradation was achieved after 40 min of irradiation due to ZnO/CuO and CNC/ZnO/CuO treatment. Moreover, the inhibition zones formed due to 100 ppm ZnO/CuO were duplicated after integrating CNC (from 7.7:10.3 mm to 14.3:20.3 mm). The hybrid nanostructure exhibit larvicidal activity against Anopheles stephensi better than CNC and ZnO/CuO nanostructures.