Adsorption and Photodegradation of Lanasol Yellow 4G in Aqueous Solution by Natural Zeolite Treated by CO2-Laser Radiation

Correa-Coyac, David; Michtchenko, Alexandre; Zacahua-Tlacuatl, Gregorio; Cruz-Narváez, Yair; Castro-Arellano, José J.; Sanpedro-Díaz, Monserrat; Rivera-Talamantes, Carlos F. de J.; Shulga, Yury M.

doi:10.3390/ma16134855

Materials

2023

DOI: 10.3390/ma16134855

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Adsorption and Photodegradation of Lanasol Yellow 4G in Aqueous Solution by Natural Zeolite Treated by CO2-Laser Radiation

David Correa-Coyac,

Alexandre Michtchenko,

Gregorio Zacahua-Tlacuatl

et al.

Abstract: Natural zeolite is a widely used material with excellent environmental cleaning performance, especially in water and wastewater treatment. Natural zeolite (Zini) calcined by CO2-laser radiation (ZL) was tested as a catalyst for the photodegradation and the adsorption of industrial azo dye Lanasol Yellow 4G (LY4G) in water. Morphology, chemical structure, and surface composition of Zini and ZL were analyzed by XRD, SEM, EDS, and XPS. UV/Visible spectrophotometry was used to evaluate the photocatalytic activity … Show more

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Methyl orange sorption on octadecylamine-modified iron oxide magnetic nanoparticles

Tianhui,

Aga-Tagieva,

Omelyanchik

et al. 2024

Chim.Tech.Acta

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This study investigates the sorption of 2-methyl orange dye onto octadecylamine-modified iron oxide magnetic nanoparticles (ODA-IONPs). The synthesized ODA-IONPs exhibit remarkable sorption capacity, reaching 800 mg/g at the nanoparticle concentrations ranging from 5 to 10 mg/g and pH of 2–8. The sorption process demonstrates rapid kinetics, achieving 90% of maximum sorption within 0.5 min. Thermodynamic analysis showed that sorption process is spontaneous and endothermic, as indicated by negative ΔG and positive ΔH values. The pseudo-second-order and Langmuir models best describe the sorption kinetics at 293 K (R² 0.99). Compared to other adsorbents, ODA-IONPs show superior MO removal capacity under a wider pH range. The influence of nanoparticle concentration, pH, and temperature on sorption efficiency is systematically explored, with optimal conditions identified at 10 mg/L ODA-IONPs and pH 6. Furthermore, the feasibility of nanoparticle reusability for sorption purposes is assessed. These findings underscore the potential of ODA-IONPs as efficient sorbents for wastewater treatment and environmental remediation applications.

show abstract

Methyl orange sorption on octadecylamine-modified iron oxide magnetic nanoparticles

Tianhui,

Aga-Tagieva,

Omelyanchik

et al. 2024

Chim.Tech.Acta

View full text Add to dashboard Cite

show abstract

Synergistic Enhancement of Electron Dynamics and Optical Properties in Zeolitic Imidazolate Framework-8-Derived Zinc Oxide via Surface Plasmon Resonance Effects of Silver Nanoparticles under UV Irradiation

Lee,

Park

2024

Materials

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This study investigates the surface plasmon resonance (SPR)-induced UV photoresponse of zinc oxide (ZnO) derived from zeolitic imidazolate framework-8 (ZIF-8) to assess the influence of silver nanoparticles (Ag NPs) on the photoresponse behavior of metal–organic framework (MOF)-derived ZnO. The initial synthesis involved a thermal treatment in air to convert ZIF-8 into ZnO. We noted enhanced optical absorption both in the UV and visible spectra with the deposition of Ag NPs onto the ZIF-8-derived ZnO. Additionally, the presence of Ag NPs in the ZnO resulted in a substantial increase in current, even without any light exposure. This increase is attributed to the transfer of electrons from the Ag NPs to the ZnO. Photocurrent measurements under UV illumination revealed that the photocurrent with Ag NPs was significantly higher—by two orders of magnitude—compared with that without Ag NPs. This demonstrates that SPR-induced absorption markedly boosted the photocurrent, although the current rise and decay time constants remained comparable to those observed with ZnO alone. Although Ag NPs contribute electrons to ZnO, creating a “pre-doping” effect that heightens baseline conductivity (even in the absence of light), this does not necessarily alter the recombination dynamics of the photogenerated carriers, as indicated by the similar rise and decay time constants. The electron transfer from Ag to ZnO increases the density of charge carriers but does not significantly influence their recombination.

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Adsorption and Photodegradation of Lanasol Yellow 4G in Aqueous Solution by Natural Zeolite Treated by CO2-Laser Radiation

Cited by 2 publications

References 57 publications

Methyl orange sorption on octadecylamine-modified iron oxide magnetic nanoparticles

Methyl orange sorption on octadecylamine-modified iron oxide magnetic nanoparticles

Synergistic Enhancement of Electron Dynamics and Optical Properties in Zeolitic Imidazolate Framework-8-Derived Zinc Oxide via Surface Plasmon Resonance Effects of Silver Nanoparticles under UV Irradiation

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