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Paris EC, Malafatti JOD, Moreira AJ, Santos LC, Sciena CR, Zenatti A, Escote MT, Mastelaro VR, Joya MR. CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support: photocatalysis, cytotoxicity, and antimicrobial response. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:41505-41519. [PMID: 35088254 DOI: 10.1007/s11356-021-18263-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Photocatalysts supported in magnetic nanocomposites for application in environmental remediation processes have been evaluated for removing contaminants due to easy recovery and low toxicity to the ecosystem. In this work, copper oxide (CuO) nanoparticles with photocatalytic properties were decorated on magnetic support constituted by hydroxyapatite (HAP) and ferrite to achieve efficiency in contaminated water remediation under visible light irradiation. First, nanomaterials were obtained by precipitation route, allowing fast and straightforward synthesis. Then, CuO nanoparticles with 6 nm diameter were efficiently decorated on magnetic support (25 nm), showing a high ability to absorb visible light irradiation (bandgap) to promote electronic transition and charge separation. Under visible irradiation, CuO promotes the H2O2 reduction in the conduction band (BC) to form hydroxyl radicals (•OH), which are responsible for rhodamine B (RhB) dye degradation (> 90% in 60 min). Magnetic hysteresis assays confirmed the magnetic properties of HAP/ferrite support, which enabled the recovery and reuse of the magnetic photocatalyst efficiently up to 3 cycles. Due to low Cu2+ leaching after the photocatalytic application stage, cytotoxicity assay for the Allium cepa seeds did not exhibit abnormal cells other than those commonly found. Furthermore, the CuO-decorated nanoparticles showed bactericidal activity against S. aureus (Gram-positive) and E. coli (Gram-negative) microorganisms, being more significant for the first one. Thus, the developed nanocomposite of CuO nanoparticles decorated on the magnetic support surface showed to be a complete system for water remediation, acting in contaminant degradation under visible light irradiation and bactericidal control with environmentally friendly characteristics.Graphical abstract CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support acting as a photocatalytic and bactericidal system.
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Affiliation(s)
- Elaine Cristina Paris
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, São Carlos, SP, 13560-970, Brazil.
| | - João Otávio Donizette Malafatti
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code: 13565-905, São Carlos, SP, Brazil
| | - Ailton José Moreira
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code: 13565-905, São Carlos, SP, Brazil
| | - Lílian Cruz Santos
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code: 13565-905, São Carlos, SP, Brazil
| | - Camila Rodrigues Sciena
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code: 13565-905, São Carlos, SP, Brazil
| | - Alessandra Zenatti
- Center for Engineering, Modeling, and Applied Social Sciences, Federal University of ABC, Avenida dos Estados, 5001, Santo André, SP, 09210-580, Brazil
| | - Márcia Tsuyama Escote
- Center for Engineering, Modeling, and Applied Social Sciences, Federal University of ABC, Avenida dos Estados, 5001, Santo André, SP, 09210-580, Brazil
| | | | - Miryam Rincón Joya
- Departamento de Física, Facultad de Ciencias, Universidad Nacional de Colombia-Bogota, Carrera 30 Calle 45-03, 111321, Bogota, Colombia
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Basahi M. Seed germination with titanium dioxide nanoparticles enhances water supply, reserve mobilization, oxidative stress and antioxidant enzyme activities in pea. Saudi J Biol Sci 2021; 28:6500-6507. [PMID: 34764765 PMCID: PMC8568823 DOI: 10.1016/j.sjbs.2021.07.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 06/27/2021] [Accepted: 07/05/2021] [Indexed: 11/20/2022] Open
Abstract
The nanoparticle has been reported to have severe effects and metabolic disorders in crops. Analysis of poisoning exposure to titanium dioxide is very important during the seed germination stage. Measuring the levels of water supply, reserve mobilization and redox metabolism with germination success is a prerequisite for understanding the TiO2 stress mechanism. These measurements are carried out using different methods, including germination tests, determination of growth parameters, analysis of reserve mobilization processes and redox activities under different stress conditions. The significant effects (P < 0.05) of TiO2 on seed germination were determined by analysis of variance (2 ways-ANOVA). We considered the effect of TiO2 dose (0 and 50 mg/L) and time of exposure (1,2,3,4 and 5 days). The results showed that TiO2 treatment significantly affected the germination rate (GR), the mean daily germination (MDG), the tissues dry weights, water supply, solute leakage, and induced oxidative stress and antioxidant enzyme activities. Oxidative and metabolic disturbances are among the major causes of the successful germination of pea seeds.
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Affiliation(s)
- Mohammed Basahi
- Shaqra University, College of Sciences and Arts- Sajer, Riyadh, Saudi Arabia
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