Anais do Workshop INEO 2023

SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES/ZNO NANOHYBRIDS FOR MONITORING AND CLEANING OF WATER RESOURCES

Published in 12/12/2023 - ISBN: 978-65-272-0088-8

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Paper Title
SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES/ZNO NANOHYBRIDS FOR MONITORING AND CLEANING OF WATER RESOURCES
Authors
  • William da Silva Martini
  • Lucas Bragança de Oliveira
  • Beatriz Rocha de Moraes
  • Rômulo Augusto Ando
  • Diogo Silva Pellosi
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-2023/611416-synthesis-and-characterization-of-silver-nanoparticleszno-nanohybrids-for-monitoring-and-cleaning-of-water-resou
ISBN
978-65-272-0088-8
Keywords
photocatalysis, emerging contaminants, nanoparticles
Summary
The monitoring of water quality is a set of activities carried out to systematically measure some physical-chemistry parameters (e.g. pH, components quantification) of water resources aiming to preserve the monitored resources, mitigate impacts and ensure their sustainable use [1]. Among different materials, silver nanoparticles (AgNP) are widely used in environmental applications, including treatment and monitoring of water quality, due to their favorable physical and chemical properties such as water solubility, their strong light absorption due to the surface plasmon resonance (SPR) effect and the generation of reactive oxygen species under light irradiation [2]. Taking into consideration these advantages, in this work, we developed a nanohybrid material combining different-shaped AgNPs synthesized by the chemical reduction method and the semiconductor zinc oxide (ZnO) nanoparticles. These AgNP/ZnO nanohybrids were produced from the ligand exchange method using 3-mercaptopropionic acid (3-MPA) as a functionalizing agent to link AgNP on the ZnO surface. The AgNP/ZnO nanohybrids have been proposed to improve the polychromatic light (UV + visible) absorption of the system and favorable electronic properties that suppress its electronic properties and delay the electron/hole pair (e-/h+) recombination on the material surface, which favor light-based process applications such as photocatalysis and Surface-Enhanced Raman Spectroscopy (SERS). UV-VIS spectra and transmission electron microscopy confirmed the AgNP morphologies and their deposition on the ZnO surface, obtaining the nanohybrid structure. The morphological structure and nanomaterial composition were also confirmed by EDS (Energy-dispersive X-ray spectroscopy) and XRD (X-ray diffraction) measurements. Photoluminescence (PL) studies confirmed the suppression of the e-/h+ recombination process, which is favorable for photocatalysts. To evaluate nanohybrid photocatalytic activity under polychromatic Hg lamp irradiation, we used the organic molecules Methyl Orange, Ibuprofen, and Atrazine as model pollutants in an aqueous solution. Our results demonstrated that the pollutant's kinetic photodegradation rate depends on the AgNP morphology. In addition, AgNP thin film substrates were obtained for the detection of these pollutant molecules models in the concentration range of 10-3 to 10-6 mol/L by SERS. The obtained Raman spectra demonstrated the interaction between the molecules and the substrate, indicating the occurrence of the SERS effect at low concentrations, which is favorable to pollutant detection in water resources. Therefore, the combination of favorable electronic properties of AgNP with a powerful photocatalyst such as ZnO allowed the obtaining of a nanohybrid system that acts in both pollutant detection (SERS) and degradation (photocatalysis). These promising results augur well for further developments of AgNP/ZnO nanohybrids aiming for plasmonic photocatalysis and SERS sensors for industrial waste degradation and detection. Acknowledgments: This work was supported by Brazilian agency Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (#2019/01604-3) and the INCET/INEO. [1] MASSOUD, Ahmed; EL-MEHASSEB, Ibrahim; ALLAH, Moustafa Saad; ELMAHALLAWY, Ehab Kotb; ALSHARIF, Khalaf F.; AHMED, Mohamed S.; DERBALAH, Aly Soliman. Frontiers In Environmental Science, [S.L.], v. 10, p. 1-14, 23 Mar. 2022. [2] MO, Fan; ZHOU, Qixing; HE, Yuqing. Science Of The Total Environment, [S.L.], v. 829, p. 154644, Jul. 2022.
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

MARTINI, William da Silva et al.. SYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES/ZNO NANOHYBRIDS FOR MONITORING AND CLEANING OF WATER RESOURCES.. 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-2023/611416-SYNTHESIS-AND-CHARACTERIZATION-OF-SILVER-NANOPARTICLESZNO-NANOHYBRIDS-FOR-MONITORING-AND-CLEANING-OF-WATER-RESOU. Access in: 24/04/2025

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