Enhancing the properties of PVDF/ MFe2O4; (M: Co-Zn and Cu-Zn) nanocomposite for the Piezoelectric Optronic applications.

Abstract

Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material whose optical properties need to be enhanced. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by (cobalt and copper) ferrite. Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles were synthesized and characterized to be used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/ (Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposites were investigated. A significant improvement in the PVDF relative permittivity, optical conductivity, refractive index, non-linear susceptibility, and a great reduction in the band gap energy value is obtained by adding Co-ZnFe2O4 nanoparticles to it. However, Cu-ZnFe2O4 nanoparticles have limited improvement of the PVDF optical properties compared to the Co-ZnFe2O4 nanoparticles. as Co-ZnFe2O4 nanoparticles increases the PVDF optical conductivity σopt. four times its original value as well as the dielectric values was increased from 0.05 for neat PVDF to 2. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles.

Research Progress and Prospects of Spinel Ferrite Nanostructures for the Removal of Nitroaromatics from Wastewater

“…3 El-Masry compared the catalytic activities of CuFe 2 O 4 , CoFe 2 O 4 , and Co-doped CuFe 2 O 4 for the reduction of different nitroaromatics. 143 Co-doped CuFe 2 O 4 showed the highest catalytic activity and recyclability up to six cycles along with high stability. 143 Hybrid CoFe 2 O 4 exhibited high catalytic efficiency toward 4-NP reduction with 99% conversion efficiency in just 50 s. 63 Highly efficient reduction of 4-nitroaniline is reported using MnFe 2 O 4.…”

“…143 Co-doped CuFe 2 O 4 showed the highest catalytic activity and recyclability up to six cycles along with high stability. 143 Hybrid CoFe 2 O 4 exhibited high catalytic efficiency toward 4-NP reduction with 99% conversion efficiency in just 50 s. 63 Highly efficient reduction of 4-nitroaniline is reported using MnFe 2 O 4. The electron-donating nature of the amino group and the electron-withdrawing effect of the nitro group lead to a resonating structure and strong interaction with MnFe 2 O 4 , which as a consequence achieves a highly efficient reduction even under dark conditions (Figure 14a).…”

“…In the second route the formation of azoxy intermediates of nitroso and aryl/alkyl hydroxylamines occurs through a condensation reaction and finally convert into their amino derivatives. 143,148 The nature of the substitution, its chemical environment, and its location on the aromatic ring has considerable impact on the reduction process and its outcomes. Meta-substituted nitroaromatics are less active toward ROS attack than ortho-or para-substituted nitroaromatics (Figure 15).…”