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Gendo KM, Feyisa Bogale R, Kenasa G. Green Synthesis, Characterization, and Evaluation of Photocatalytic and Antibacterial Activities of Co 3O 4-ZnO Nanocomposites Using Calpurnia aurea Leaf Extract. ACS OMEGA 2024; 9:28354-28371. [PMID: 38973856 PMCID: PMC11223149 DOI: 10.1021/acsomega.4c01595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 06/01/2024] [Accepted: 06/04/2024] [Indexed: 07/09/2024]
Abstract
The green synthesis of transition metal oxide nanocomposites using plant extracts is a new and effective method that avoids the involvement of hazardous chemicals. Nondegradable organic pollutants and antibiotic drug resistance have become serious public health issues worldwide. Hence, the main objective of this study is to synthesize Co3O4-ZnO nanocomposites using Calpurnia aurea leaf extract and evaluate its photocatalytic and antibacterial activities. The green synthesized particles were characterized using UV-vis spectra, Fourier transform infrared spectroscopy, X-ray diffraction techniques, and scanning electron microscopy combined with energy-dispersive X-ray studies. The synthesized particles were found to be crystalline in nature with average crystallite sizes of 23.82, 14.79, 15.99, 16.46, and 21.73 nm. Scanning electron microscopy shows the spherical morphology of Co3O4-ZnO NCs, and energy-dispersive X-ray analysis confirms the formation of highly pure ZnO NPs and Co3O4-ZnO NCs. The photocatalytic activity was performed under natural sunlight using malachite green as an organic dye pollutant. The green synthesized ZnO NPs, Co3O4 NPs, 1:4, 1:3, and 1:2 Co3O4-ZnO NCs showed high degradation efficiency after 60 min of irradiation. The synthetic material showed good potential against Staphylococcus aureus and Escherichia coli, with the highest growth inhibition recorded by 1:2 Co3O4-ZnO NCs. The kinetics study of the photocatalytic degradation was confirmed as pseudo first order, and the possible mechanisms for both photocatalytic and antibacterial activities were clearly determined.
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Affiliation(s)
- Kemal Mohammed Gendo
- Department
of Chemistry, College of Natural and computational Sciences, Wollega University, Nekemte 395, Ethiopia
| | - Raji Feyisa Bogale
- Department
of Chemistry, College of Natural and computational Sciences, Wollega University, Nekemte 395, Ethiopia
| | - Girmaye Kenasa
- Department
of Biology, College of Natural and Computational Sciences, Wollega University, Nekemte 395, Ethiopia
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Liu B, Li C, Han J, Chen Y, Zhao Z, Lu H. Biosynthesized gold nanoparticles using leaf extract of Citrus medica inhibit hepatocellular carcinoma through regulation of the Wnt/β-catenin signaling pathway. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
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Yılmaz HÇ, Atalay FE, Kaya H, Erdemoğlu S. Sol-gel synthesis of TiO 2 on Co 3O 4-coated sporopollenin exine microcapsules (SECs) and photocatalytic performance of new semiconductor heterojunction material. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:78620-78636. [PMID: 35696060 DOI: 10.1007/s11356-022-21357-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 06/04/2022] [Indexed: 06/15/2023]
Abstract
In this study, a new approach was developed to prepare mesoporous hybrid TiO2/Co3O4 coated on Juglans sporopollenin exine microcapsules (SECs). TiO2 was synthesized on Co3O4-coated SECs used as substrate, by sol-gel method. The obtained semiconductor/semiconductor hetero-junction hybrid materials were characterized with X-ray diffractometry (XRD), UV-Vis absorption spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), particle size distribution, specific surface area, and zeta potential measurements. Photocatalytic performances of hybrid materials were tested for Reactive Black 5 dye under both UV and visible light. Equilibrium pH of the solution containing 10 mg/L Reactive Black 5 dye and 0.1% wt/v TiO2/Co3O4 was around 4.7. After irradiation in the solar box, more than 98% of the Reactive Black 5 was photocatalytically degraded within 60 min.
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Affiliation(s)
- Hatice Çağlar Yılmaz
- Department of Chemistry, Faculty of Science and Arts, İnönü University, 44280, Malatya, Turkey
| | - Funda Ersoy Atalay
- Department of Physics, Faculty of Science and Arts, İnönü University, 44280, Malatya, Turkey
| | - Harun Kaya
- Faculty of Engineering and Natural Sciences, Malatya Turgut Özal University, 44280, Malatya, Turkey
| | - Sema Erdemoğlu
- Department of Chemistry, Faculty of Science and Arts, İnönü University, 44280, Malatya, Turkey.
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Manzoor S, Yasmin G, Raza N, Fernandez J, Atiq R, Chohan S, Iqbal A, Manzoor S, Malik B, Winter F, Azam M. Synthesis of Polyaniline Coated Magnesium and Cobalt Oxide Nanoparticles through Eco-Friendly Approach and Their Application as Antifungal Agents. Polymers (Basel) 2021; 13:polym13162669. [PMID: 34451208 PMCID: PMC8400448 DOI: 10.3390/polym13162669] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/02/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Plant-mediated synthesis of nanoparticles exhibits great potential to minimize the generation of chemical waste through the utilization of non-toxic precursors. In this research work, we report the synthesis of magnesium oxide (MgO) and cobalt oxide (Co3O4) nanoparticles through a green approach using Manilkara zapota leaves extract, their surface modification by polyaniline (PANI), and antifungal properties against Aspergillus niger. Textural and structural characterization of modified and unmodified metal oxide nanoparticles were evaluated using FT-IR, SEM, and XRD. The optimal conditions for inhibition of Aspergillus niger were achieved by varying nanoparticles’ concentration and time exposure. Results demonstrate that PANI/MgO nanoparticles were superior in function relative to PANI/Co3O4 nanoparticles to control the growth rate of Aspergillus niger at optimal conditions (time exposure of 72 h and nanoparticles concentration of 24 mM). A percentage decrease of 73.2% and 65.1% in fungal growth was observed using PANI/MgO and PANI/Co3O4 nanoparticles, respectively, which was higher than the unmodified metal oxide nanoparticles (67.5% and 63.2%).
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Affiliation(s)
- Suryyia Manzoor
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60000, Pakistan; (S.M.); (G.Y.); (A.I.)
| | - Ghazala Yasmin
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60000, Pakistan; (S.M.); (G.Y.); (A.I.)
| | - Nadeem Raza
- Department of Chemistry, Emerson University, Multan 60000, Pakistan;
| | - Javier Fernandez
- Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;
| | - Rashida Atiq
- Department of Plant Pathology, Bahauddin Zakariya University, Multan 60000, Pakistan; (R.A.); (S.C.)
| | - Sobia Chohan
- Department of Plant Pathology, Bahauddin Zakariya University, Multan 60000, Pakistan; (R.A.); (S.C.)
| | - Ayesha Iqbal
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan 60000, Pakistan; (S.M.); (G.Y.); (A.I.)
| | - Shamaila Manzoor
- Department of Physics and Astronomy, University of Florence, Via Sansone1, 50019 Sesto Fiorentino, Italy
- Correspondence: (S.M.); (M.A.)
| | - Barizah Malik
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore 54590, Pakistan;
| | - Franz Winter
- Institute of Chemical, Environmental and Bioscience Engineering, TU WIEN, Getreidemarkt 9, 1060 Vienna, Austria;
| | - Mudassar Azam
- Institute of Chemical, Environmental and Bioscience Engineering, TU WIEN, Getreidemarkt 9, 1060 Vienna, Austria;
- Institute of Chemical Engineering & Technology, University of the Punjab, Lahore 54590, Pakistan
- Correspondence: (S.M.); (M.A.)
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Chilakapati RB, Hemanth Kumar S, Satyanarayana SV, Behara DK. Adsorptive removal of methylene blue (MB) and malachite green (MG) dyes from aqueous solutions using graphene oxide (GO). Z PHYS CHEM 2021. [DOI: 10.1515/zpch-2020-1717] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Abstract
Graphene oxide (GO) synthesized via modified Hummers method was studied for adsorption of methylene blue (MB) and malachite green (MG) dyes from aqueous solutions. It is hypothesized that electrostatic interactions between dye molecules and surface of GO will facilitate charge carrier movements and degrade the dye in an efficient way. The as synthesized GO was characterized using various characterization techniques such as XRD, Raman, FTIR, UV–Vis, SEM and EDAX. The experimental results suggest that dye removal percentage will increase with increase in adsorbent dosage, time as well as solution pH and the process was exothermic in nature. The adsorption data at 293 K could be fitted by Langmuir equation with a maximum adsorption amount of 119.04, 102.4 mg/g and Langmuir adsorption equilibrium constant of 1.58, 0.867 L/mg for MB and MG dyes, respectively. The outcomes of present article will help not only to understand the adsorption characteristics of GO on MB and MG dyes but also paves path towards development of highly oxidized GO surface for degradation of complex dyes.
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Affiliation(s)
| | - S. Hemanth Kumar
- Department of Chemical Engineering , JNTUA College of Engineering (Autonomous) , Ananthapuramu 515002 , India
| | - Suggala V. Satyanarayana
- Department of Chemical Engineering , JNTUA College of Engineering (Autonomous) , Ananthapuramu 515002 , India
| | - Dilip Kumar Behara
- Department of Chemical Engineering , JNTUA College of Engineering (Autonomous) , Ananthapuramu 515002 , India
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In-situ stabilization of silver nanoparticles in polymer hydrogels for enhanced catalytic reduction of macro and micro pollutants. Z PHYS CHEM 2020. [DOI: 10.1515/zpch-2020-1721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Abstract
The in-situ stabilization of Ag nanoparticles is carried out by the use of reducing agent and synthesized three different types of hydrogen (anionic, cationic, and neutral) template. The morphology, constitution and thermal stability of the synthesized pure and Ag-entrapped hybrid hydrogels were efficiently confirmed using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and thermo gravimetric analysis (TGA). The prepared hybrid hydrogels were used in the decolorization of methylene blue (MB) and azo dyes congo red (CR), methyl Orange (MO), and reduction of 4-nitrophenol (4-NP) and nitrobenzene (NB) by an electron donor NaBH4. The kinetics of the reduction reaction was also assessed to determine the activation parameters. The hybrid hydrogen catalysts were recovered by filtration and used continuously up to six times with 98% conversion of pollutants without substantial loss in catalytic activity. It was observed that these types of hydrogel systems can be used for the conversion of pollutants from waste water into useful products.
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