Polymeric graphitic carbon nitride–barium titanate nanocomposites with different content ratios: a comparative investigation on dielectric and optical properties

Enhancement of dielectric and electric-field-induced polarization of bismuth fluoride nanoparticles within the layered structure of carbon nitride

“…The bands responsible for C=N stretching vibration have been observed at 1634 and 1562 cm −1 , whereas the aromatic C-N stretching vibration noticed at 1,243, 1,321 and 1,415 cm −1 for the BFCN sample. The triazine/s-triazine ring modes, correspond to condensed carbon-nitrogen heterocycles, detected at the wavenumber of 880 and 804 cm −1 for CN and 809 cm −1 for BFCN sample, with different intensities 43,44 . The vibration bands positioned at 1,456 and 880 cm −1 for the CN sample are not visible in the FTIR spectrum of BFCN sample.…”

TiO2/graphitic carbon nitride nanosheet composite with enhanced sensitivity to atmospheric water

“…This nding was earlier explained by the altered band gap which affects the electronic polarization and consequently 3 ′ . 23,24 Additionally, 3 ′ of the TiO 2 /CNNS composite at 400 °C (lled circles in Fig. 3a) is smaller than that at RT (open circles) due to the lack of water-induced charge carriers.…”

“…It was found that the dielectric permittivity 3 ′ of g-C 3 N 4 varies from 7 in thin lm 13,18 to ∼60 in bulk. 23,24 Pareek and Quamara 24 showed the decreasing 3 ′ with increasing TiO 2 content in the TiO 2 /g-C 3 N 4 composite, despite of the intrinsic dielectric nature of TiO 2 . Moreover, 3 ′ of BaTiO 3 /g-C 3 N 4 composite is even lower than the individual components.…”

“…in plane) is approximately two orders of magnitude smaller than that through the stacked layers (out of plane). 21 A few authors explored the properties of g-C 3 N 4 -based composites with metal oxides or polymers, [22][23][24][25] where the tested specimens can be easily prepared by pelletizing the powder. It was found that the dielectric permittivity 3 ′ of g-C 3 N 4 varies from 7 in thin lm 13,18 to ∼60 in bulk.…”

Tuning the Energy Storage Efficiency in PVDF Nanocomposites Incorporated with Crumpled Core–Shell BaTiO3@Graphene Oxide Nanoparticles

“…CNTs and graphene are combined with BTO in different forms to deliver significantly improved dielectric performance due to the high potential for improving the dielectric property. However, it is found that the presence of a conductive phase will greatly increase the dielectric loss of the composites, making it unsuitable for energy storage applications. − , Subsequently, introducing functional groups, polymer grafting, and polymer cladding have been proved to be an effective strategy to obtain composites with high dielectric constant and largely suppressed dielectric loss. − For example, Nawanil et al modified CNT and BTO by carboxylation and hydroxylation, respectively, in which the interaction between the fillers and polydimethylsiloxane has been improved, leading to the achievement of the higher dielectric constant (9.7 at 1 kHz) and the lower dielectric loss of the thin film. In addition, compared with graphene platelets (GNP), graphene oxide (GO) emerges as a much more effective alternative for improving the dielectric performance because of the moderate dielectric constant and low dielectric loss.…”