Degradation study on structural and optical properties of annealed Rhodamine B doped poly(vinyl) alcohol films

Tripathi, J.; Tripathi, S.; Keller, J. M.; Das, K.; Shripathi, T.

doi:10.1016/j.polymdegradstab.2012.11.003

Cited by 18 publications

(11 citation statements)

References 19 publications

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“…This is probably due to the difference in nanoparticle sizes. Also, the broadening of the X-ray peak is inversely proportional to the size of the nanoparticles, as noted in the Scherrer equation results [20].…”

Section: X-ray Diffraction Of Paa Blended With Equivalent Amounts Of Rhb and Aunps Sizes (11 And 13 Nm)mentioning

confidence: 70%

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Molecular and fluorescence spectroscopic studies of polyacrylic acid blended with rhodamine B mixed gold nanoparticles

Madami

Seoudi

2020

Journal of Taibah University for Science

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This work studies the improvement of the emission spectra of polyacrylic acid (PAA) by adding different ratios of rhodamine dye (RhB) to different sizes and shapes of gold nanoparticles (AuNPs). AuNPs were prepared by chemical reduction method at heating temperature 80°C and a different time. The experimental results of both UV-Visible spectroscopy and TEM technique showed that the AuNPs were formed at different times (1-15 min) with different plasmonic band positions and has particle sizes 11 and 13 nm, for AuNPs were formed at 1 and 10 min respectively. FTIR, UV-Vis, X-ray diffraction, and SEM techniques used in the characterization of PAA blended by an equivalent amount of RhB and AuNPs with size 11 and 13 nm. The band appeared at 1683 cm −1 in PAA spectra which is assigned to C = O became doubling in the PAA blended samples due to the AuNPs may be coordinating with the oxygen atom in the C = O group. Fluorescence measurements indicated an emission band appeared at 585 and 590 nm for PAA doped by RhB and AuNPs with size 11 and 13 nm, respectively. The intensity of these emission bands was enhanced for the PAA blended by increasing both AuNPs and RhB ratios due to the interactions between dipole moments of the SPR of the AuNPs and RhB molecules. Therefore, it could be enhancing the fluorescence intensity of these samples, and it can be used as an laser active medium. Highlights• Synthesis of AuNPs with different sizes.• Prepare PAA blended by RhB and AuNPs.• Study the coordination of AuNPs with PAA using FTIR.• Explain the effect of RhB and AuNPs on fluorescence spectra.

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Section: X-ray Diffraction Of Paa Blended With Equivalent Amounts Of Rhb and Aunps Sizes (11 And 13 Nm)mentioning

confidence: 70%

“…It can, therefore, be concluded that the RhB does not affect the AuNPs structures [22]. The crystal sizes (D) were estimated at each peak using Scherrer's formula [20],…”

Section: X-ray Diffraction Of Paa Blended With Equivalent Amounts Of Rhb and Aunps Sizes (11 And 13 Nm)mentioning

confidence: 99%

Molecular and fluorescence spectroscopic studies of polyacrylic acid blended with rhodamine B mixed gold nanoparticles

Madami

Seoudi

2020

Journal of Taibah University for Science

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“…In pure PVA, a characteristic PVA XRD peak at 2q ¼ 19.79 is observed. 23 It can be noticed that with doping, no peaks of compound are seen separately. 21 However, we observed that the semicrystalline nature of PVA is loss with doping.…”

Section: Xrd Studiesmentioning

confidence: 99%

“…This breaking of semicrystalline nature into purely amorphous may be due to the thermally induced changes in the polymer bonding (as the sample preparation temperature is 75 C). 23 Further, when heat energy is given to the crystalline region, the lattice start vibrating via phonons and this interaction may lead to the bond breaking or formation new bonds in the system. 23 This feature of interaction in the present case is seen in the crystalline region of host PVA, which shows a drastic decrease in crystallinity.…”

Section: Xrd Studiesmentioning

confidence: 99%

“…23 Further, when heat energy is given to the crystalline region, the lattice start vibrating via phonons and this interaction may lead to the bond breaking or formation new bonds in the system. 23 This feature of interaction in the present case is seen in the crystalline region of host PVA, which shows a drastic decrease in crystallinity. This type of trend was also observed in dye doped PVA.…”

Section: Xrd Studiesmentioning

confidence: 99%

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Gamma irradiation studies of composite thin films of poly vinyl alcohol and coumarin

2016

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The influence of branched polyethyleneimine concentration on the spectroscopic and morphology of BPEI/AuNPs for photocatalytic reduction of 4-nitrophenol

Abd El-Mongy,

Seoudi,

Hussein

2024

J Mater Sci: Mater Electron

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In this work, gold nanoparticles (AuNPs) were synthesized and stabilized by branched polyethyleneimine (BPEI) due to their amine groups as a low-cost alternative method. The concentration of BPEI as a critical factor can be used to optimize stable AuNPs with varying sizes. To evaluate BPEI concentrations on surface plasmonic resonance (SPR), size distribution, chemical coordination, and photocatalytic activity of BPEI-AuNPs products, UV–visible, transmission electron microscope, and Fourier transform infrared spectroscopy were used. The SPR bands appeared at 524, 520, and 517 nm as the BPEI concentration increased (10–30 µL), and the band remained stable as BPEI increased. TEM images show a wide range of sizes (polydisperse) for BPEI/AuNPs were formed. According to TEM images, gold nanoparticle sizes were calculated at (18, 12, and 5 nm) for BPEI concentrations 10, 20, and 30 µL. Fourier transform infrared spectroscopy (FTIR) revealed that amine groups from BPEI play an important role in stabilizing AuNPs. For accessing the photocatalytic activity of BPEI-AuNPs, the reduction of 4-nitrophenol (4-NP) by borohydride is a widely used model reaction. As the AuNPs sizes decreased from 18 to 5 nm, the reduction rate was accelerated and the reaction time of 4-NP to 4-AP conversion decreased from 270 to 150 s.

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Degradation study on structural and optical properties of annealed Rhodamine B doped poly(vinyl) alcohol films

Cited by 18 publications

References 19 publications

Molecular and fluorescence spectroscopic studies of polyacrylic acid blended with rhodamine B mixed gold nanoparticles

Molecular and fluorescence spectroscopic studies of polyacrylic acid blended with rhodamine B mixed gold nanoparticles

Gamma irradiation studies of composite thin films of poly vinyl alcohol and coumarin

The influence of branched polyethyleneimine concentration on the spectroscopic and morphology of BPEI/AuNPs for photocatalytic reduction of 4-nitrophenol

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