Spectroscopy Study of Polyvinyl Alcohol/Carbon Dots Composite Films

Abstract

The unique characteristic of carbon dots (C-dots), such as optical and electrical properties, have been integrated into polyvinyl alcohol (PVA) to realize composites with synergistic. In this work, C-dots have been synthesized from inner cassava peels using simple methods at low temperatures. The C-dots were added to PVA, which is influenced the characteristic based on spectroscopy. The complex formation between PVA and C-dots was investigated by FTIR spectroscopy. The C-dots contributed to UV-Vis spectroscopy characteristic of PVA/C-dots with the absence of a new peak of absorbance spectra. Besides, C-dots also supported the electrochemical impedance spectroscopy characteristic of PVA/C-dots, so the highest ionic conductivity is induced by the enhancement of amorphous PVA when the c-dots content is increased.

Synthesis and Characterization of Zinc Vanadate Nanostructures for Supercapacitor Applications

“…(2) 𝐹(𝑅)ℎ𝑣 = 𝐴(ℎ𝑣 − 𝐸𝑔) 𝑛 (3) F(R) is the absolute function reflection (R), also called Kubelka-Munk function, A and ℎ𝑣 are constant, and energy of the photon for n = ½, indirectly allowed transition and n = 2, directly allowed transition [32,33].…”

Carbon Dot/Polymer Composites with Various Precursors and Their Sensing Applications: A Review

“…Natural precursors that have heteroatoms such as nitrogen (N), sulfur (S), phosphorus (P), and boron (B) are very comfortable starting materials with which to prepare doped CDs, unlike other doped CDs derived from synthetic precursors, which require the external addition of heteroatom-containing compounds [55]. Several natural products have been used for the preparation of CDs before manufacturing their composites with polymers, including inner cassava peels [56], Acerola fruit [57], mango peels [58], Cedrus [59], rosemary leaves [60], chitosan [61], and starch [62]. Although CDs from natural products have various prominent advantages, as mentioned above, they usually need more time for pretreatment and have low quantum yields (QYs) compared to those derived from synthetic products.…”

Revealing the incorporation of an NH2group into the edge of carbon dots for H2O2sensingviathe C–N⋯H hydrogen bond interaction

“…[16][17][18][19] Cdots are carbon nanoparticles below 10 nm in size with zero dimensions, and they possess unique optical characteristics. [20][21][22] In addition, Cdots have a spherical shape with an sp 2 hybridized carbon atom framework, and there are many oxygen and nitrogen molecules in functional groups on the surface or edges. 23,24 However, there are no reports for an in-depth study of the interaction between Cdots and H 2 O 2 as a complex interaction in a theoretical approach using density-functional theory (DFT) and timedependent density-functional theory (TD-DFT) methods.…”