Preparation and Characterization of Polyaniline and Ag/ Polyaniline Composite Nanoporous Particles and Their Antimicrobial Activities

Abukhadra, Mostafa R.; Rabia, Mohamed; Fathallah, Walid; El-Mawgoud, Neama Abd; Mahmoud, Asmaa M.; Hussien, Heba; Said, Omnia

doi:10.1007/s10924-017-0937-1

Cited by 58 publications

(27 citation statements)

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“…The spectral bands at 1105 cm −1 and 1015 cm −1 reflect the presences of CN group and chloride group incorporation in the polymer chain , respectively. CH in‐plane bending vibration and para‐aromatic rings are reflected by spectral bands at 789 cm −1 and 587 cm −1 , respectively .…”

Section: Resultsmentioning

confidence: 99%

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Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Rabia

Abukhadra

Ahmed

et al. 2019

Env Prog and Sustain Energy

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Three nanomaterials based on polyaniline (PANI) are prepared on indium tin oxide (ITO) and applied as electrodes for H2 generation due to the water‐splitting process. PANI/ITO films are prepared using oxidation polymerization method at 25°C, then coated with Au nanoparticles with different thicknesses (sputter time from 1 to 2 min). The three prepared electrodes; PANI/ITO (Electrode (0), 1‐min‐Au/PANI/ITO (Electrode (I)), and 2‐min‐Au/PANI/ITO (Electrode (II)) are compared for H2 generation from H2O. Scanning electron microscope, X‐ray diffraction, UV‐Vis spectrophotometer, and Fourier‐transform infrared spectroscopy analyses have been carried out, in which the average PANI crystal size was ~20 nm. Moreover, the bandgaps were determined, in which 2‐min‐Au/PANI/ITO has the optimum bandgap of 2.25 eV. The characteristic behavior of the H2 generation took place depending on the current density (Jph) value by using Jph–V and Jph–time study. Also, the incident photon‐to‐current conversion efficiency (IPCE) and the applied bias photon‐to‐current efficiency (ABPE) were calculated for the Electrode (II) at 25°C. The optimum IPCE and ABPE efficiency were 18.7 and 0.99%, respectively, at 390 nm. By increasing the temperature to 70°C, the IPCE efficiency increases to about 37%. Finally, activation energy (Ea), enthalpy (ΔH*), and entropy (ΔS*) were determined, in which the values were 24.32 kJ mol−1, 10.90 kJ mol−1, and 74.99 J K−1 mol−1, respectively. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Section: Resultsmentioning

confidence: 99%

“…The average crystallite size of the PANI crystal particles is determined from the full width at half maximum (W) data, considering the single main peak at 25.55° . The calculation was carried out using Scherrer's formula; D = 0.9 λ / W cos θ ; where θ is the Bragg's angle, W is in radians, λ is the X‐ray wavelength (CuKα = 0.15405 nm).…”

Section: Resultsmentioning

confidence: 99%

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Rabia

Abukhadra

Ahmed

et al. 2019

Env Prog and Sustain Energy

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“…Based on direct allowed transition type, the optical band gaps of all samples were estimated using Tauc’s equation (Eq. 2 ) 41 . where 𝛼 is the absorption coefficient, A is the absorbance of the sample, E g is the optical band gap, h is the Planck’s constant, v is photon frequency.…”

Section: Resultsmentioning

confidence: 99%

TiO2 Nanoribbons/Carbon Nanotubes Composite with Enhanced Photocatalytic Activity; Fabrication, Characterization, and Application

Abukhadra

Ashraf

2018

Sci Rep

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195

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TiO2 nanoribbons (TiO2 NRs) loaded with FeCo-Al2O3 catalyst were synthesized and used as a precursor in the synthesis of TiO2 nanoribbons/carbon nanotubes (TiO2 NRs/CNTs) composite by a chemical vapor deposition (CVD) method. TiO2 NRs and TiO2 NRs/CNTs composite were characterized by XRD, FT-IR, TEM, SEM, EDX and UV-Vis spectrophotometer. The results revealed the formation of TiO2-B and hydrogen titanate nanoribbon like structures by the hydrothermal treatment. After loading TiO2 NRs by FeCo-Al2O3 catalyst and the CVD growth of carbon nanotubes, the synthetic TiO2 nanoribbons converted entirely to TiO2-B nanoribbons with nanopits structure. The composite composed of tube-like nanostructures forming an interlocked network from CNTs and TiO2-B NRs. The composite shows a relatively red-shifted band gap (3.09 eV), broader and stronger UV absorption band relative to TiO2 NRs. The photocatalytic properties of TiO2 NRs and TiO2 NRs/CNTs composite were studied under sunlight irradiation. The photocatalytic degradation of methylene blue (MB) dye was investigated as a function of contact time, dye concentration, and catalyst dose. The kinetics and mechanisms of degradation were discussed. TiO2 NRs/CNTs composite showed higher stability after six runs and 50% shorter irradiation time than TiO2 NRs photocatalyst.

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“…Moreover, reactive oxygen species (ROS) are generated on the surface of the particles by nano photocatalytic processes. These species can penetrate the cell wall and hence damage the DNA and enzymes of bacteria and finally lead to the death of the microorganism [ 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the interruption of electron transportation through transmembrane has been stated in the case of some metal nanoparticles, such as Ag and Zn [ 56 , 57 ]. The reaction of ZnO NPs with the cell of bacteria by a liaison of them to bacteria cell wall causing the killing of bacteria by rupture of their cell wall [ 58 , 59 ].…”

Section: Resultsmentioning

confidence: 99%

Design and Characterization of a Novel ZnO–Ag/Polypyrrole Core–Shell Nanocomposite for Water Bioremediation

et al. 2021

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Incorporating nanostructured metal and metal oxide in a polymer matrix is a strategic way to develop a novel candidate for water bioremediation. In this study, under microwave irradiation, a ZnO–Ag/polypyrrole (PPy) nanocomposite with a core/shell structure was prepared by interfacial polymerization of pyrrole in the presence of ZnO nanoparticles and AgNO3 as an oxidant. The antimicrobial behavior of the ZnO–Ag core combined with the electrical properties of the conducting PPy shell created a special ZnO–Ag/PPy nanocomposite with inherent adsorption behavior and antimicrobial properties. More impressively, the as-prepared ZnO–Ag/PPy displayed enhanced adsorption of Cd2+ and PO43− ions in the mixed solution. At pH 8, it had overall removal efficiencies of 95% and 75% for Cd2+and PO43− ions, respectively. The Freundlich adsorption model, rather than the Langmuir adsorption model, better fits the adsorption isotherm results. The adsorption kinetics also followed the pseudo-second-order kinetic model. Additionally, the engineered nanocomposite demonstrated antifungal activity against different fungi, as well as remarkable antibacterial activity against Gram-negative and Gram-positive bacteria. The synergistic combination of crystallinity, coherence of the ZnO–Ag core in the PPy matrix, and the negative zeta potential all contribute to this nanocomposite’s high efficiency. Our results have significant consequences in the wastewater bioremediation field using a simple operation process.

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Preparation and Characterization of Polyaniline and Ag/ Polyaniline Composite Nanoporous Particles and Their Antimicrobial Activities

Cited by 58 publications

References 50 publications

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

Effect of plasmonic au nanoparticles on the photoactivity of polyaniline/indium tin oxide electrodes for water splitting

TiO2 Nanoribbons/Carbon Nanotubes Composite with Enhanced Photocatalytic Activity; Fabrication, Characterization, and Application

Design and Characterization of a Novel ZnO–Ag/Polypyrrole Core–Shell Nanocomposite for Water Bioremediation

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