Photodegradation of methylene blue with PVA/PVP blend under UV light irradiation

Zidan, H. M.; El-Ghamaz, N.A.; Abdelghany, A.M.; Waly, A.L.

doi:10.1016/j.saa.2018.03.057

Cited by 39 publications

(18 citation statements)

References 25 publications

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“…and the applied electric field (E). Therefore, the nonlinear refractive index (n2), first-order susceptibility (𝜒 (1) ), and higher-order susceptibility (𝜒 (3) ) of the as-prepared polymer films must be examined. First, 𝜒 (3) can be being determined using the following relation:…”

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

“…where C = 1.7x10 -10 esu, and 𝜒 (1) is determined by known the linear refractive index (nav) using the formula:…”

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

“…The first-order 𝜒 (1) and nonlinear parameters (𝜒 (3) and n2) are summarized in Table 2. The larger values are observed for 3Bi-blend, as shown in Fig 13 . At higher Bi-metal concentrations, more particles absorb extra electromagnetic waves, leading to high polarization of the polymer films and an improvement in the nonlinear parameters.…”

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

“…Polymer materials have fascinated scientists due to their safe, economical price, plentiful, eco-sustainable properties, and their extensive application in technical and scientific study. They can be used in optoelectronics, solar cells, UV-filters, coatings, photovoltaics, lightemitting diodes (LEDs), laser production, as well as several other potential applications [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure Study And Linear/Nonlinear Optical Properties of Bi-Embedded PVP/ PVA Films For Optoelectronic And Optical CUT-OFF Applications

Ali

Abdelaziz

Sayed

et al. 2022

Preprint

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Hybrid polymer films of polyvinyl pyrrolidone (PVP)/ polyvinyl alcohol (PVA) embedded with gradient levels of Bi-powder were prepared using a conventional solution casting process. X-ray diffraction (XRD), Fourier transform infrared spectroscopic (FT-IR), and Scanning electron microscope (SEM) techniques have been used to examine the micro/molecular structural and morphological of the synthesized flexible films. The XRD peak intensity and FTIR spectra of the PVA gradually decline as Bi-metal is introduced. In addition, filler changes the microstructure surface of the pure film. The modification in the microstructure leads to an enhancement in the optical characteristic of the blend films. The indirect allowed transition energy was calculated via Tauc's and ASF models. The decrease in the hybrid film’s bandgap (\({E}_{gi}^{opt}\)) returns to the localized states in the forbidden region, as illustrated by the Urbach energy (Eu) values. The optical absorption parameters, including absorption coefficient (α) and edge (Ee), have also been evaluated. The relation between the transition energy and the refractive index (n) was studied. The rise of Bi-metal concentrations leads to an improvement in the nonlinear (χ(3)) susceptibility and (n2) refractive parameters. The optical limiting characteristics (OLC) revealed that the higher concentration dopant films reduce the light transmission intensity. The results suggest that hybrid films are promising materials in a wide range of applications, especially optical devices, and optoelectronics.

show abstract

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

“…where C = 1.7x10 -10 esu, and 𝜒 (1) is determined by known the linear refractive index (nav) using the formula:…”

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

Section: Nonlinear Optical Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure Study And Linear/Nonlinear Optical Properties of Bi-Embedded PVP/ PVA Films For Optoelectronic And Optical CUT-OFF Applications

Ali

Abdelaziz

Sayed

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Optoelectronics, coatings, solar cells, laser manufacturing, photovoltaics, and a variety of other prospective future technologies are all possible owing to the polymer materials. [1,2] A polymer blend is a material made up of two or several polymers. Typically, polymer blends provide a different set of properties.…”

mentioning

confidence: 99%

Use of niobium oxide nanoparticles as nanofillers in PVP/PVA blends to enhance UV–visible absorption, opto‐linear, and nonlinear optical properties

Ali

Sayed

Algarni

et al. 2022

Vinyl Additive Technology

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Transition metal oxide (TMO)-filled polymer films have numerous applications, including electromagnetic shielding and nonlinear optical devices.Nb 2 O 5 -filled polyvinyl pyrrolidone (PVP)/polyvinyl alcohol (PVA) blend was prepared using a solution casting process. Pristine and nanocomposite films from these blends were studied. X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier infrared spectroscopy confirmed the formation of nanocomposites via interfacial interactions between the polymer chains and Nb 2 O 5 nanoparticles. These nanoparticles influence the amorphous nature and transparency of the PVA/PVP blends. The improvement of D opt (optical density) becomes particularly obvious in blended polymer films with considerable Nb 2 O 5 -nanofiller concentrations. By increasing the weight percentage of Nb 2 O 5 , the probability of producing additional levels in the bandgap increased. The optical absorption coefficient of each nanocomposite film was less than 10 6 m À1 , indicating indirect electron transfer. Thus, the indirect optical band-gap declined from 3.9 to 1.9 eV as calculated from Tauc's and the absorption spectral fitting (ASF) formula. Additionally, the effects of Nb 2 O 5 on the extinction coefficient, refractive index, highfrequency (ε ∞ ), and static-frequency (ε o ) dielectrics have been reported. The nonlinear refractive index and optical susceptibilities (x 1 and x 3 ) were enhanced by increasing the Nb 2 O 5 content in the blend. The penetration depth (δ) and optical limiting (OL) properties were also investigated. The developed nanocomposite materials could be used for advanced technologybased devices such as reflective coatings, opto-linear, and nonlinear optoelectronic applications.

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Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

Mohammed

Yahia

El‐Mongy

2023

J of Applied Polymer Sci

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The simple solution casting method was utilized for preparing composite films (PVA-30 wt% PVP) incorporated with various content of erbium ions (Er 3+ ) (0.11, 0.37, 1.85, 3.7, 9.25, and 18.5) wt%. The composite films' properties were investigated using XRD, UV-Vis, and dielectric spectrometers. The XRD patterns showed a noticeable decline in structural elements, including crystallinity level. The transmittances of the investigated samples decrease as Er 3+ increases. Studies on UV-Vis absorption have revealed that the UV-Vis absorption spectra are shifting to the higher wavelengths, causing a decrease in the optical energy bandgap values from 4.66 to 3.48 eV for an indirect transition and from 5 to 4.84 eV for a direct transition, which suggests that the filler interacts with the blend matrix. As the number of localized states in the forbidden energy bandgap rises, it has been shown that with increasing Er 3+ -the estimated Urbach's energy increases from 1.95 to 32 meV. The addition of erbium ions raises the refractive index of the blend film. The optical limits of the samples are investigated using a He-Ne laser beam with a wavelength of 632.8 nm and a solid-state green diode laser beam with a wavelength of 532 nm. The prospect of greater charge carrier concentration and mobility was confirmed by increased AC conductivity with increasing frequency. Dielectric permittivity and dielectric loss tangent were utilized to analyze dielectric behavior. The analysis of the electric modulus (M 0 and M 00 ) of as-prepared samples has been completed. These findings are anticipated to notably impact a broad spectrum of applications, including organic semiconductors, optoelectronic devices, polymer solar cells, and polymer waveguides. K E Y W O R D Sdielectric characteristics, erbium ions (Er 3+ )-doped PVA/PVP, optical limiting/CUT-OFF laser filters, refractive index-bandgap analysis, XRD/FTIR

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Photodegradation of methylene blue with PVA/PVP blend under UV light irradiation

Cited by 39 publications

References 25 publications

Microstructure Study And Linear/Nonlinear Optical Properties of Bi-Embedded PVP/ PVA Films For Optoelectronic And Optical CUT-OFF Applications

Microstructure Study And Linear/Nonlinear Optical Properties of Bi-Embedded PVP/ PVA Films For Optoelectronic And Optical CUT-OFF Applications

Use of niobium oxide nanoparticles as nanofillers in PVP/PVA blends to enhance UV–visible absorption, opto‐linear, and nonlinear optical properties

Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

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