Synthesis of hematite (α-Fe2O3) nanoparticles using Syzygium cumini extract: Photodegradation of norfloxacin and enhanced recyclability

Author(s):Show less -

Ferreira, Davi S. ; Marques, Gleison N. ; Ferreira, Adrianadas Merces P. ; Oliveira, Marcelo M. ; da Rocha, Claudia Q. ; Moreira, Ailton J. ; Fernandes, Carlos H. M. ; Lanza, Marcos R. ; Bernardi, Maria Ines B. ; Mascaro, Lucia H. ; Rangel, Jose Hilton G.

• Document type: Journal article
• Source: Materials Chemistry and Physics; v. 332, p. 12-pg., 2024-12-20.

Abstract

In this study, we report obtaining alpha-Fe2O3 nanoparticles by a green synthesis method using different concentrations of Syzygium cumini (L.) Skeels (Myrtaceae) leaf extract. X-ray diffraction (XRD) analysis of materials confirmed the presence of pure hematite phase alpha-Fe2O3 without any impurities. In addition, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques revealed almost spherical NPs' morphology. At the same time, it was clear from the dispersive energy X-ray (EDS) technique that no other chemical elements were present in the sample. On the other hand, the band gap energy obtained from the materials was 1.9 and 2.0 eV. The photodegradation tests showed a photocatalytic efficiency of 96 % for the sample produced with the lowest extract concentration. The mineralization rate of norfloxacin was 32.5 %, as indicated by the Total Organic Carbon tests. In addition, its potential to generate reactive oxygen species that aid in the degradation of the pharmaceutical contaminant has been confirmed. (AU)

• FAPESP's process: 18/22210-0 - EMU granted in process 2017/10118-0: liquid chromatograph (HPLC)
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 23/06558-5 - Gas diffusion electrodes modified with Co and Fe NPs and biochar for the degradation of antidepressant drugs: mechanistic and technological aspects
• Grantee: Carlos Henrique Magalhães Fernandes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 23/07525-3 - Developing and disseminating new technologies for environmental remediation of emerging contaminants
• Grantee: Ailton Jose Moreira
• Support Opportunities: Scholarships in Brazil - Generation Project
• FAPESP's process: 19/06650-3 - EMU granted in the 2017/10118-0 process: potentiostat system with impedance module
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 18/22022-0 - EMU granted in the 2017/10118-0 process: spectroelectrochemistry system
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 18/09761-8 - Study and development of ionic polymer/metal composites for application in actuators and sensors aiming low cost and high performance
• Grantee: Roger Gonçalves
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/06128-5 - Study of antiviral activity against SARS-CoV-2 OF copper nanoparticles and copper oxide supported in kefiran
• Grantee: Gleison Neres Marques
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 23/01425-7 - Development of carbon/non-noble metal based electrocatalysts for hydrogen peroxide generation in environmental applications
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Regular Research Grants
• FAPESP's process: 22/12895-1 - Advanced processes for the degradation of emerging pollutants: catalytic materials, electroanalytical sensors and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 22/06219-3 - Developing and disseminating new technologies for environmental remediation of emerging contaminants
• Grantee: Ailton Jose Moreira
• Support Opportunities: Generation Project Research Grant
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 18/22211-7 - EMU granted in process 2017/10118-0: total organic carbon analyzer (TOC)
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Multi-user Equipment Program