Power-dependent nonlinear optical behaviours of ponceau BS chromophore at 532 nm via Z-scan technique

Rosli, Muhammad Izz; Abdullah, Mundzir; Krishnan, Ganesan; Harun, Sulaiman Wadi; Aziz, M. S.

doi:10.1016/j.jphotochem.2020.112574

Cited by 21 publications

(3 citation statements)

References 32 publications

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“…The analysis of the FTIR spectra recorded after the retention of Acid Red 66 dye ( Figure 4 B), Reactive Black 5 ( Figure 4 C), or their combinations ( Figure 4 D–F) showed the existence of functional groups such as diazene (at about 1500 cm −1 ) or sulfonate group attached to benzene (vibrations between 1400 cm −1 and 1000 cm −1 ) [ 59 ] specific to AR or the bands of C−C, C=C, and N=N, which were observable from 1600 cm −1 to 1500 cm −1 [ 60 , 61 ] and were assignable to RB. These facts sustain the conclusion that the adsorption of the molecules took place.…”

Section: Resultsmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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The treatment of contaminated water is currently a major concern worldwide. This work was directed towards the preparation of a composite hydrogel by entrapping cherry stones powder on chitosan, which is known as one of the most abundant natural polymers. The synthesized material was characterized by scanning electron microscopy, by Fourier transform infrared spectroscopy, and by the point of zero charge determination. Its ability to remove two azo dyes models (Acid Red 66 and Reactive Black 5) existing in single form and in binary mixture was evaluated. Response Surface Methodology–Central Composite Design was used to optimize three parameters affecting the process while targeting the lowest final contaminant concentrations. The best results were obtained at pH 2, an adsorbent dose of 100 g/L, and a temperature of 30 °C, when more than 90% of the pollutants from the single component systems and more than 70% of those of the binary mixtures were removed from their aqueous solutions. The adsorption process was in accordance with Elovich and pseudo-second-order kinetic models, and closely followed the Freundlich and Temkin equilibrium isotherms. The obtained results led to the conclusion that the prepared hydrogel composite possesses the ability to successfully retain the target molecules and that it can be considered as a viable adsorbent material.

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Section: Resultsmentioning

confidence: 99%

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Grigoraș

Simion

Favier

et al. 2022

Gels

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show abstract

“…The z -scan experiment provides qualitative insight into the nonlinear response of a sample by probing the transmittance of optical pulses through the sample at different power density (power per unit area). − The power density is varied by translating the sample through a focused beam. At position z = 0, the sample is positioned at the beam focus, and thus it experiences the maximum power density.…”

Section: Resultsmentioning

confidence: 99%

Polymeric Nonlinear Absorption Chromophore Array from Controlled Radical Polymerization and “Click” Chemistry

Chen

Liao

Price

et al. 2020

ACS Appl. Polym. Mater.

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A polyacrylate with pendant nonlinear absorption (NLA) chromophores was prepared via the reversible addition−fragmentation (RAFT)−click synthetic strategy. The polyacrylate backbone of the NLA polymer was constructed by reversible addition−fragmentation (RAFT) polymerization and subsequently modified to azide-containing "clickable polymers". Platinum acetylide chromophores that exhibit NLA via both two-photon absorption (TPA) and excited-state absorption (ESA) mechanisms were subsequently attached to the azide-substituted polyacrylate via copper(I)-catalyzed azide−alkyne cycloaddition. The resulting polymer exhibits similar photophysical properties to the platinum acetylide precursor chromophore, including steady-state absorption and emission, triplet−triplet transient absorption, and nonlinear absorption properties. In addition, the resulting polymers can be spin-coated to afford an optically transparent film, which also preserved the nonlinear absorption characteristics of the chromophores.

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“…The FTIR spectrum of ADM (blue line, Figure 7) shows the vibrations of the π conjugation system of C=C bending (1606 cm −1 ) and of N=N stretching (1482 cm −1 ), characteristics of amines. The sulfonate group vibrations are observed at 1396 cm −1 (the S=O double bond) and 1052 cm −1 (the S-O bond) [52]. A broad signal at 3354 cm −1 is attributed to N-H bonds for amines.…”

Section: Discussionmentioning

confidence: 99%

Removal of Azo Dyes from Water Using Natural Luffa cylindrica as a Non-Conventional Adsorbent

Aranda-Figueroa,

Rodríguez-Torres,

Rodríguez

et al. 2024

Molecules

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Reducing high concentrations of pollutants such as heavy metals, pesticides, drugs, and dyes from water is an emerging necessity. We evaluated the use of Luffa cylindrica (Lc) as a natural non-conventional adsorbent to remove azo dye mixture (ADM) from water. The capacity of Lc at three different doses (2.5, 5.0, and 10.0 g/L) was evaluated using three concentrations of azo dyes (0.125, 0.250, and 0.500 g/L). The removal percent (R%), maximum adsorption capacity (Qm), isotherm and kinetics adsorption models, and pH influence were evaluated, and Fourier-transform infrared spectroscopy and scanning electron microscopy were performed. The maximum R% was 70.8% for 10.0 g L−1 Lc and 0.125 g L−1 ADM. The Qm of Lc was 161.29 mg g−1. Adsorption by Lc obeys a Langmuir isotherm and occurs through the pseudo-second-order kinetic model. Statistical analysis showed that the adsorbent dose, the azo dye concentration, and contact time significantly influenced R% and the adsorption capacity. These findings indicate that Lc could be used as a natural non-conventional adsorbent to reduce ADM in water, and it has a potential application in the pretreatment of wastewaters.

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Power-dependent nonlinear optical behaviours of ponceau BS chromophore at 532 nm via Z-scan technique

Cited by 21 publications

References 32 publications

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Performance of Dye Removal from Single and Binary Component Systems by Adsorption on Composite Hydrogel Beads Derived from Fruits Wastes Entrapped in Natural Polymeric Matrix

Polymeric Nonlinear Absorption Chromophore Array from Controlled Radical Polymerization and “Click” Chemistry

Removal of Azo Dyes from Water Using Natural Luffa cylindrica as a Non-Conventional Adsorbent

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