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A facile construction of bacterial cellulose/ZnO nanocomposite films and their photocatalytic and antibacterial properties
- Wahid, Fazli, Duan, Yun-Xia, Hu, Xiao-Hui, Chu, Li-Qiang, Jia, Shi-Ru, Cui, Jian-Dong, Zhong, Cheng
- International journal of biological macromolecules 2019 v.132 pp. 692-700
- Gram-negative bacteria, X-ray diffraction, antibacterial properties, biocompatible materials, cellulose, methyl orange, nanocomposites, nanoparticles, nitrates, particle size, photocatalysis, scanning electron microscopy, sodium hydroxide, thermal stability, thermogravimetry, ultraviolet radiation, zinc, zinc oxide
- Bacterial cellulose (BC) has numerous excellent properties but the absence of antibacterial activity restricts its applications in biomedical field. Therefore, in order to introduce the antibacterial characteristics into BC; herein, a facile method for incorporation of ZnO nanoparticles (ZnO-NPs) is presented. BC films were first immersed in zinc nitrate solution, followed by treating with NaOH solution, the BC loaded ZnO nanocomposite films were dried by a sheet former instrument at 80 °C for 20 min. The obtained BC/ZnO nanocomposites were characterized by different techniques. XRD results showed the hexagonal wurtzite structure of ZnO-NPs while FE-SEM results displayed the particle size of ZnO-NPs was ranging from 70 to 100 nm. Thermogravimetric study revealed the thermal stability of nanocomposite films. The nanocomposite exhibited photocatalytic activity and revealed 91% degradation of methyl orange (MO) under UV-irradiation within 2 h. Moreover, the nanocomposites demonstrated significant UV-blocking properties and showed antibacterial activities against tested Gram-positive and Gram-negative bacterial strains. This work provides a simple and novel method for the synthesis of BC/ZnO nanocomposite as a functional biomaterial.