Carboxymethylcellulose/polyvinylpyrrolidone filled with Al-doped ZnO nanoparticles as a promising film for optoelectronic applications

Hameed, Talaat A.; Mohamed, F.; Turky, Gamal; Salama, Ahmed

doi:10.1016/j.optmat.2022.113097

Cited by 34 publications

(19 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the power spectrum of the sample ( P Sample ) and reference ( P ref ), the transmittance T , the absorption coefficient α , the refractive index n , and the dielectric constant ε * are computed by 65,66 :

T (ω) = \frac{P_{samp ((), ω)}}{P_{Ref} (ω)} \times 100

n (ω) = 1 + \frac{c φ (ω)}{d ω}

Here, φ , ω, d and c are the phase shift, the angular frequency, the sample thickness, and the velocity of light in a vacuum, respectively. The absorption coefficient α ( ω ) is calculated by the means of 67

α (ω) = \frac{2 ωk}{c} = \frac{1}{d} \{\ln [\frac{4 n ((), ω)}{{((), n ((), ω) goodbreak+ 1)}^{2}}] - \ln |T (ω)|\}

with, k defines the extinction coefficient.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Mohamed

Ahmad

Hameed

2023

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

This work aims to develop a multifunctional PMMA/CoFe 2 O 4 polymeric film of low loss dielectric constant, high magnetic properties, and perceptible terahertz shielding effectiveness. Pure cobalt ferrite magnetic nanoparticles (CoFe 2 O 4 MNPs) were prepared by a facile-modified solution deposition method. Then, the nanoparticles were loaded to poly (methyl methacrylate) of different ratios (x = 0, 5, 10, 15, and 20 wt%) to synthesize films by evaporative casting technique. X-ray diffraction (XRD) evidenced the formation of CoFe 2 O 4 MNPs in the cubic spinal structure. The FTIR confirmed the interaction of CoFe 2 O 4 MNPs with PMMA chains. Compared to the pure PMMA, the PMMA/CoFe 2 O 4 nanocomposites were more thermally stable, as evidenced by thermogravimetric analysis, (TGA) and differential scanning calorimetry (DSC). The micrograph images by FESEM unraveled that CoFe 2 O 4 MNPs have formed in different geometrical shapes (nanocubes, nanotubes, and nano oval). The values of the band gap energy were computed by the absorption spectra fitting (ASF) method. It varied from 4.94 to 4.68 eV, as the CoFe 2 O 4 MNPs contents were changed from 0 to 20 wt%. Compared to host PMMA, the dielectric permittivity was enhanced, while the dielectric loss was slightly decreased. Therefore, the prepared film can be employed as a passive component in electronic circuits, namely capacitors and supercapacitors. The shielding effectiveness (SE) was found to be improved with frequency and CoFe 2 O 4 content, reflecting the applicability of PMMA/CoFe 2 O 4MNPs films in terahertz shielding. The magnetic parameters were investigated by a vibrating sample magnetometer (VSM) and were found to increase with CoFe 2 O 4 content, which could be used as a flexible film in magnetic applications.

show abstract

T (ω) = \frac{P_{samp ((), ω)}}{P_{Ref} (ω)} \times 100

n (ω) = 1 + \frac{c φ (ω)}{d ω}

α (ω) = \frac{2 ωk}{c} = \frac{1}{d} \{\ln [\frac{4 n ((), ω)}{{((), n ((), ω) goodbreak+ 1)}^{2}}] - \ln |T (ω)|\}

with, k defines the extinction coefficient.…”

Section: Resultsmentioning

confidence: 99%

“…The cobalt ferrite content dependence on the optical gap is presented Based on the power spectrum of the sample (P Sample ) and reference (P ref ), the transmittance T, the absorption coefficient α, the refractive index n, and the dielectric constant ε* are computed by 65,66 :…”

Section: Estimation Of Band Gap By Absorption Spectra Fittingmentioning

confidence: 99%

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Mohamed

Ahmad

Hameed

2023

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

show abstract

“…Grain Size, Microstrain, and Dislocations. The full width at half-maximum of the dominant reflection (220) was employed to determine the grain size (G D-S ), microstrain (⟨ε⟩), dislocations (δ), and the number of crystallites (N) as described below: 41,42…”

Section: Resultsmentioning

confidence: 99%

“…The full width at half-maximum of the dominant reflection (220) was employed to determine the grain size ( G D‑S ), microstrain (⟨ε⟩), dislocations (δ), and the number of crystallites ( N ) as described below: , D normalD − normalS = k λ β D − S 1 cos ( θ ) < ε > = β .25em cot ( θ ) 4 δ = 1 D 2 N = t D 3 where d expresses the interplanar distance, ( hkl ) refers to Miller indices, and k indicates the shape factor (0.94). All the obtained values of the grain size ( G D‑S ), microstrain (⟨ε⟩), dislocations (δ), and the number of crystallites ( N ) are recorded in Table .…”

Section: Resultsmentioning

confidence: 99%

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Mohammad H. Al Sulami,

Alsabban,

Al-Sulami

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

Copper selenide (Cu–Se) and copper sulfide (Cu–S) are promising cathodes for magnesium-ion batteries. However, the low electronic conductivity of Cu–Se system results in a poor rate capability and unsatisfactory cycling performance. Mg-ion batteries based on the Cu–S cathode exhibited large kinetic barriers during the recharging process owing to the presence of polysulfide species. This work attempts to circumvent this dilemma by doping Cu1.8Se by sulfur, which replaces the selenium in the CuSe lattice to form Cu1.8Se0.6S0.4 nanocrystalline powder. The presence of sulfur will increase the electronic conductivity, and the presence of selenium will mitigate the effect of polysulfide species that hinder the kinetics of Mg2+. Herein, a Cu1.8Se0.6S0.4 nanocrystalline powder was synthesized by the solid-state reaction, yielding a highly pure and stoichiometric powder. The crystallographic structure of the nanopowder and the conversion-type storage mechanism have been attested via ex situ X-ray diffraction and energy-dispersive X-ray analysis. The nanocrystalline feature of Cu1.8Se0.6S0.4 was demonstrated by high-resolution transmission electron microscopy. An apparent surface morphology change during the charging/discharging process has been visualized by a field emission scanning electron microscope. Diffuse reflectance spectroscopy has discussed the variation of the band gap during charging and discharging. The full Mg/Cu1.8Se0.6S0.4 cells presented an initial discharge capacity of 387.99 mAh g– 1 at a current density of 0.02 mA cm–2; moreover, they show moderate diffusion kinetics with ≈ 10–15 cm–2 s–1.

show abstract

“…As stated, the variation in the intensity of peaks and the formation of new reflections are an indication of boosted crystallinity. As a result, for better estimation of the degree of crystallinity, the following correlation is applied 45,46 :…”

Section: Degree Of Crystallinity (X C )mentioning

confidence: 99%

Fabrication and characterization of (PVDF/PEO)/AgBiSe₂ polymeric membrane with enhanced visible light photocatalytic performance

Ismail,

Nasr,

Hameed

2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Driven by the visible band gap, silver bismuth selenide (AgBiSe2) was loaded in PVDF/PEO blend to enhance the photodegradation of Maxilon blue dye. AgBiSe2 nanoparticles were successfully synthesized by facile solvothermal approach and then loaded to PVDF/PEO (80/20) by 10, 20, and 30 wt%, by evaporative casting method. The X‐ray results in tandem with the Fourier transform infrared (FTIR) established the successful fabrication of (PVDF/PEO)/x(AgBiSe2) polymer nanocomposites. The X‐ray analysis verified the formation of hexagonal AgBiSe2 of a crystallite size ranging from 14.3 to 23.24 nm. The FT‐IR results manifested an overlap between functional groups that corroborated the interaction between PVDF and PEO. Peaks of the AgSe, and SeO modes confirmed that the nanofiller and PVDF/PEO blend were successfully incorporated. The micrograph images by field emission scanning electron microscope (FESEM) unraveled the high tendency of AgBiSe2 to form a uniform cluster. The optical band gap was found to be a direct band gap of 2.86 eV for 30 wt% AgBiSe2 proving its validity as visible‐light‐driven photocatalysts. The removal percentages of the prepared membrane are 4.1, 59, 82, and 98 for 0, 10%, 20%, and 30% AgBiSe2 after 300 min of irradiation under simulated sunlight at pH 6.

show abstract

Carboxymethylcellulose/polyvinylpyrrolidone filled with Al-doped ZnO nanoparticles as a promising film for optoelectronic applications

Cited by 34 publications

References 82 publications

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Fabrication and characterization of (PVDF/PEO)/AgBiSe₂ polymeric membrane with enhanced visible light photocatalytic performance

Contact Info

Product

Resources

About

Carboxymethylcellulose/polyvinylpyrrolidone filled with Al-doped ZnO nanoparticles as a promising film for optoelectronic applications

Cited by 34 publications

References 82 publications

Greener synthesis of lightweight, self‐standing PMMA/CoFe2O4 polymeric film for magnetic, electronic, and terahertz shielding applications

Greener synthesis of lightweight, self‐standing PMMA/CoFe2O4 polymeric film for magnetic, electronic, and terahertz shielding applications

Nanosynthesis and Characterization of Cu1.8Se0.6S0.4 as a Potential Cathode for Magnesium Battery Applications

Fabrication and characterization of (PVDF/PEO)/AgBiSe2 polymeric membrane with enhanced visible light photocatalytic performance

Contact Info

Product

Resources

About

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Fabrication and characterization of (PVDF/PEO)/AgBiSe₂ polymeric membrane with enhanced visible light photocatalytic performance