Fabrication of transparent ultraviolet blocking films using nanocomposites derived from metal-organic frameworks

摘要

This study has developed a novel approach to the design of nanocomposites derived from Metal-Organic Frameworks (MOFs) which are capable of absorbing ultraviolet (UV) radiation. In this work, two various nanocomposites namely ZnO/C and ZnO/C-W were obtained at 800 degrees C from the TMU-21 in an argon and argon atmosphere saturated with water vapors, respectively. Water was used as a weak oxidizing agent to control the ratios of C to ZnO. This is a facile rout to adjust the properties of the obtained nanocomposites. The structure of these nanocomposites was determined by XRD, SEM, FTIR and elemental mapping analysis. Then, to investigate the optical properties of the obtained nanocomposites, two hybrid films were synthesized using poly (vinyl alcohol) (PVA) as well as the obtained nanocomposites. Also, the content of nanocomposites was studied in order to understand the role of carbon and ZnO in the absorption of radiations. The results revealed that the ratio metal oxide to carbon (ZnO/C) significantly affected the absorption capacity of the UV. The ZnO/C-W nanocomposite revealed high performance in transmission of 95% visible light irradiation, along with absorption of 96% UVA irradiation. This irradiation absorption performance is noteworthy among all the reported UV absorbers. To date, no comprehensive research has been carried out on nanocomposites developed from MOFs for UV absorption, and the work provided presents fresh insight into the successful role of these nanocomposites in the absorption of hazardous rays with high frequencies. (C) 2021 Published by Elsevier B.V.