Structural and optical amendment of PVDF into CQDs through high temperature calcination process

A controlled and successful high temperature calcination of PVDF was performed to synthesize high quality CQDs from polymeric membrane via electrospinning to control its shape and size. X-Ray Diffractograms show the formation of CQDs after thermal reduction of polymeric nanofibers with an average crystallite size of similar to 1.9 nm. Raman spectrum reveals the formation of intense G-band which confirms the presence of carbon nanomaterials in the form of CQDs with ratio of intensities I-G/I-D similar to 3.7. The variation of FTIR spectrum before and after calcination process supports the speculation of the suppression of oxygen containing functional groups. XPS and UV-Vis absorption spectrum confirms the highly stable and rich carbon content of C=C group. FE-SEM and TEM demonstrates the spherical distribution of quantum dots with an average size of -2.6 nm.

Automated summary

A controlled and successful high temperature calcination of PVDF was performed to synthesize high quality CQDs, with an average crystallite size of around 1.9 nm and intense G-band in Raman spectrum. The speculation of the suppression of oxygen containing functional groups was supported by the variation of FTIR spectrum. XPS and UV-Vis absorption spectrum confirmed the highly stable and rich carbon content of C=C group in CQDs. FE-SEM and TEM showed the spherical distribution of quantum dots with an average size of -2.6 nm.