Synthesis of nanocomposites of polypyrrole/carbon nanotubes/silver nano particles and their application in water disinfection

Abstract

Contamination of drinking or irrigation water with pathogenic bacteria, such as Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), is a major global health problem.

Biogenic synthesis of a green tea stabilized PPy/SWCNT/CdS nanocomposite and its substantial applications, photocatalytic degradation and rheological behavior

“…The peak at around 1620 and 1550 cm À1 in the SWCNT spectrum correlates with C]C bond vibration (nanotube structures overlapped by carbonyl peaks). 37,38 The intensity of these two bands is greater in the nanocomposite samples, indicating the presence of PPy. There are also peaks at 1452 cm À1 (C-N vibrational stretch), 1314 and 1305 cm À1 (]C-H and C-N in-plane bending), 1173 cm À1 (pyrrole ring vibrations), 1046 cm À1 (C-H or C-N inplane deformation), 922 cm À1 (C-H out-of-plane deformation vibrations of the ring) and 790 cm À1 (C-H out-of-plane ring deformation).…”

“…There are also peaks at 1452 cm À1 (C-N vibrational stretch), 1314 and 1305 cm À1 (]C-H and C-N in-plane bending), 1173 cm À1 (pyrrole ring vibrations), 1046 cm À1 (C-H or C-N inplane deformation), 922 cm À1 (C-H out-of-plane deformation vibrations of the ring) and 790 cm À1 (C-H out-of-plane ring deformation). 38,39 The weak peaks near 1102, 650, and 605 cm À1 conrm the presence of CdS. 34,37 However, with an increase in the wt% of SWCNTs, a slight blue-shi in the FTIR peaks is observed.…”

“…These shis in the peak positions may arise due to the rich synergetic interactions between the SWCNTs, CdS, and PPy. 34,38 (iv) Study of the photocatalysis and kinetics of photodegradation…”

Biocompatible Nanocomposites Based on Poly(styrene-block-isobutylene-block-styrene) and Carbon Nanotubes for Biomedical Application

“…An increase in the CNT content led to a gradual reduction in the intensity of these absorption peaks due to the scattering of the reflected energy. The wide peak at 1600 cm −1 could be attributed to C–C vibrations in CNTs [ 23 ].…”

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

“…The electrode modified with PB/CNP/PPy exhibits an excellent activity for the electrocatalytic oxidation of hydrazine. In pathogenic bacteria detection, nanocomposites of PPy/ CNTs/Ag nanoparticles have been fabricated because they were efficient towards E. coli with 100% removal [152]. This design of ternary system fully utilized the high affinity of silver nanoparticles towards sulfur-containing amino acids and phosphor, and the ability of CNT for effectively killing bacteria by causing perturbation and/or disruption of the cell membrane via oxidation.…”