𝑁-methylpyrrole (𝑁-MPy) and 2,2'-bithiophene (BTh) were electrocopolymerized in 0.2 Macetonitrile–sodium perchlorate solvent–electrolyte couple on a glassy carbon electrode (GCE) by cyclic voltammetry (CV). The resulting homopolymers and copolymers in different initial feed ratios of [𝑁-MPy]₀/[BTh]₀ = 1/1, 1/2, 1/5 and 1/10 were characterized by CV, Fourier-transform infrared reflectance attenuated transmittance (FTIR–ATR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and electrochemical impedance spectroscopy (EIS). The capacitive behaviours of the modified electrodes were defined via Nyquist, Bode-magnitude, Bode-phase and admittance plots. The equivalent circuitmodel of R(C(R)(QR)(CR)) was performed to fit theoretical and experimental data. The highest low-frequency capacitance (𝐶_LF) were obtained as 𝐶_LF = ∼ 1.23 × 10^-4 mF cm^-2 for P(N-MPy), 𝐶_LF = ∼ 2.09 × 10^-4 mF cm^-2 for P(BTh) and 𝐶_LF = ∼ 5.54 × 10^-4 mF cm^-2 for copolymer in the inital feed ratio of [𝑁-MPy]₀/[BTh]₀ = 1/2.

Due to the impact of the Covid-19 pandemic, the usage of numerous protective face masks has faced an explosion in demand around the world. Therefore, the need to reduce the environmental pollution caused by disposable single-use face masks has become vital. Recently, alternative raw material solutions have been discussed to eliminate the consumption of single-use plastics. Within this research, gelatin nanofibers were fabricated via centrifugal spinningtechnique, and filtration media were investigated in terms of air permeability and filtration efficiency. In addition, morphological properties were examined with scanning electron microscopy. Fabricated fibers have a changing average diameter range from 232 to 778 nm, and targeted 95% filtration efficiency was achieved in several compositions. It was proven that biodegradable gelatin nanofibers could be a sustainable alternative for disposable N95 respiratory filters.