IN-SITU REDUCTION OF GOLD NANOPARTICLES ON CATIONIC CELLULOSE MICROFIBERS (CMF/AUNPS) APPLIED TO DYE PHOTODEGRADATION

Andressa Silva Gomes; Maria Vitória Guimarães Leal; Gabrieli Roefero Tolosa; GUILHERME DOGNANI; Aldo Eloizo Job

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Paper Title

IN-SITU REDUCTION OF GOLD NANOPARTICLES ON CATIONIC CELLULOSE MICROFIBERS (CMF/AUNPS) APPLIED TO DYE PHOTODEGRADATION

Authors

Andressa Silva Gomes
Maria Vitória Guimarães Leal
Gabrieli Roefero Tolosa
GUILHERME DOGNANI
Aldo Eloizo Job

Modality

Pôster

Subject area

Síntese e caracterização de materiais

Publishing Date

12/12/2023

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/workshop-do-ineo-2023/613027-in-situ-reduction-of-gold-nanoparticles-on-cationic-cellulose-microfibers-(cmfaunps)-applied-to-dye-photodegrada

ISBN

978-65-272-0088-8

Keywords

cationic cellulose microfiber, gold nanoparticles, dye photodegradation, eriochrome black T.

Summary

Dye-contaminated wastewater has become a wide concern worldwide, once dyes can be highly toxic to human health and further live organisms [1]. This conjuncture stimulated the creation of different approaches for water treatment, highlighted between them, the photocatalytic degradation process [2]. It is a simple, efficient, and low-cost method that uses the reactive species generated to interact with contaminant molecules, breaking the chemical bonds [1]. In this way, some gold nanoparticles-based materials have been applied to dye photodegradation [3]. The present study presents a hybrid material of cationic cellulose microfibers with gold nanoparticles reduced in situ (CMF/AuNPs). The photodegradation capacity of eriochrome black T dye was evaluated under white (LED lamp) and ultraviolet light, in addition, the presence of hydrogen peroxide (H2O2). The cationic cellulose microfibers (CMF) were obtained from sugarcane bagasse by sodium periodate (NaIO4) oxidation and cationization based on Huang, X. et al. [4]. Nanoparticle reduction was adapted from Zhang, K. et al. [5], adding HAuCl4 solution (2 mmol/L) in cellulose suspension under constant stirring and 90 °C. The purple suspension of CMF/AuNPs was obtained, and the fibers were washed with ultrapure water and ethanol twice. The CMF/AuNPs presence was confirmed by UV-Vis absorption and transmission electronic microscopy (TEM). All of the photodegradation tests were performed with CMF/AuNPs suspension of 7.5 mg (dry weight), the final volume of 15 mL, final pH of 1.8, contact time of 1, 2, and 3 h, and distance of the light-samples at 50 centimeters. The results showed the light-dependent degradation using this hybrid material (CMF/AuNPs). Under white light, 3h of contact time, EBT concentration of 10 mg/Lwas around 35% of degradation efficiency, while under UV light at the same experimental conditions, the efficiency reached around 55%. In presence of H2O2 even under UV light, there was a decrease in efficiency that can be explained by the competition of OH radicals and dye molecules on the surface of the nanoparticles. Therefore, this work provided considerable differences in the photodegradation efficiency with CMF/AuNPs application, becoming an alternative material of simple and eco-friendly synthesis for dyeing wastewater photodegradation. Acknowledgments The authors would like to thank the support of UNESP, the Brazilian agencies FAPESP (Sao Paulo Research Foundation), and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior). The authors also would to thank the INEO project (#2014/50869-6). References [1]Saeed, M et al. Environ. Sci. Pollut., 29, 293–311 (2022). [2]Ng, H.K. M et al. Prog. Org. Coat. 132, 70-75 (2019). [3]Singh, R. K. et al. J. Photochem. Photobiol. A: Chem. 400, 112704, (2020). [4]Huang, X. et al. ACS Sustainable Chem. Eng. 8, 12, 4734–4744, (2020). [5]Zhang, K. et al. Carbohydr. Polym., 186, 132–139, (2018).

Title of the Event: Workshop do INEO 2023
City of the Event: Nazaré Paulista
Title of the Proceedings of the event: Anais do Workshop INEO 2023
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

GOMES, Andressa Silva et al.. IN-SITU REDUCTION OF GOLD NANOPARTICLES ON CATIONIC CELLULOSE MICROFIBERS (CMF/AUNPS) APPLIED TO DYE PHOTODEGRADATION.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/613027-IN-SITU-REDUCTION-OF-GOLD-NANOPARTICLES-ON-CATIONIC-CELLULOSE-MICROFIBERS-(CMFAUNPS)-APPLIED-TO-DYE-PHOTODEGRADA. Access in: 18/06/2025