Designing of sustainable, solid-state and photoluminescence switchable electrospun nanofibrous PVA/WTR-CDs hybrid films: A photophysical study

Publication date: 1 July 2019Source: Journal of Photochemistry and Photobiology A: Chemistry, Volume 380Author(s): Anil H. Gore, Akshay S. Patil, Datta B. Gunjal, Vaibhav M. Naik, Ravindra D. Waghmare, Chandrashekhar S. Patil, Govind B. KolekarAbstractHerein we proposed a sustainable solid-state photoluminescent nanofibrous hybrid films fabricated through electrospining of polyvinyl alcohol (PVA) and carbon dots (CDs). The CDs employed during the fabrication hybrid films were derived from waste and abundantly available carbonaceous waste tea residue (WTR) precursor. More interestingly, the photoluminescent PVA/WTR-CDs hybrid films were able to switch the increased amount of incorporated WTR-CDs simply under UV light. The as prepared nanofibrous PVA/WTR-CDs hybrid films were further characterized by different techniques in order to confirm the successful and homogenous incorporation WTR-CDs into PVA matrix viz.UV–vis spectroscopy, Field emission-scanning electron microscopy (FE-SEM), Fluorescence spectroscopy and microscopy, Fourier transform infra red spectroscopy (FT-IR). The photophysical investigations of all the films (pristine and hybrid) with respect to its liquid solutions revealed that the intrinsic properties of liquid WTR-CDs were well restored in solid-state nanofibrous hybrid films of PVA/WTR-CDs. Furthermore, morphological analysis via FE-SEM showed uniform and smooth nanofibers in a PVA films with average diameter 0.104 μm and were increased with increased ...
Source: Journal of Photochemistry and Photobiology A: Chemistry - Category: Chemistry Source Type: research