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Yin Q, Zhou Q, Hu J, Weng J, Liu S, Yin L, Long L, Tong Y, Tang K, Bai S, Ou L. Fabrication of bimetallic Ag@ZnO nanocomposite and its anti-cancer activity on cervical cancer via impeding PI3K/AKT/mTOR pathway. J Trace Elem Med Biol 2024; 84:127437. [PMID: 38564977 DOI: 10.1016/j.jtemb.2024.127437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024]
Abstract
INTRODUCTION Bimetallic nanoparticles, specifically Zinc oxide (ZnO) and Silver (Ag), continue to much outperform other nanoparticles investigated for a variety of biological uses in the field of cancer therapy. This study introduces biosynthesis of bimetallic silver/zinc oxide nanocomposites (Ag@ZnO NCs) using the Crocus sativus extract and evaluates their anti-cancer properties against cervical cancer. METHODS The process of generating bimetallic nanoparticles (NPs), namely Ag@ZnO NCs, through the utilization of Crocus sativus extract proved to be uncomplicated and eco-friendly. Various methods, such as UV-vis, DLS, FTIR, EDX, and SEM analyses, were utilized to characterize the generated Ag@ZnO NCs. The MTT assay was employed to assess the cytotoxic properties of biosynthesized bimetallic Ag@ZnO NCs against the HeLa cervical cancer cell line. Moreover, the impact of Ag@ZnO NCs on HeLa cells was assessed by examining cell survival, ROS production, MMP levels, and induced apoptosis. Through western blot analysis, the expression levels of the PI3K, AKT, mTOR, Cyclin D, and CDK proteins seemed to be ascertained. Using flow cytometry, the cancer cells' progression through necrosis and apoptosis, in addition to the cell cycle analysis, were investigated. RESULTS Bimetallic Ag@ZnO NCs that were biosynthesized showed a high degree of stability, as demonstrated by the physicochemical assessments. The median size of the particles in these NCs was approximately 80-90 nm, and their zeta potential was -14.70 mV. AgNPs and ZnO were found, according to EDX data. Further, Ag@ZnO NCs hold promise as a potential treatment for cervical cancer. After 24 hours of treatment, a dosage of 5 µg/mL or higher resulted in a maximum inhibitory effect of 58 ± 2.9. The concurrent application of Ag/ZnO NPs to HeLa cells resulted in elevated apoptotic signals and a significant generation of reactive oxygen species (ROS). As a result, the bimettalic Ag@ZnO NCs treatment has been recognized as a chemotherapeutic intervention by inhibiting the production of PI3K, AKT, and mTOR-mediated regulation of propagation and cell cycle-regulating proteins. CONCLUSIONS The research yielded important insights into the cytotoxic etiology of biosynthesized bimetallic Ag@ZnO NCs against HeLa cells. The biosynthesized bimetallic Ag@ZnO NCs have a significant antitumor potential, which appears to be associated with the development of oxidative stress, which inhibits the development of the cell cycle and the proliferation of cells. Therefore, in the future, biosynthesized bimetallic Ag@ZnO NCs may be used as a powerful anticancer drug to treat cervical cancer.
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Affiliation(s)
- Qinghua Yin
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China.
| | - Qiang Zhou
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Jianbing Hu
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Jie Weng
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Songlian Liu
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Leilan Yin
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Ling Long
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Yajun Tong
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Kewei Tang
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Site Bai
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
| | - Ludi Ou
- Department of Oncology, Yueyang Central Hospital, Yueyang, Hunan 414000, China
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Yeganeh M, Sobhi HR, Fallah S, Ghambarian M, Esrafili A. Sono-assisted photocatalytic degradation of ciprofloxacin in aquatic media using g-C 3N 4/MOF-based nanocomposite under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33222-z. [PMID: 38743329 DOI: 10.1007/s11356-024-33222-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 04/02/2024] [Indexed: 05/16/2024]
Abstract
This research study is centered on the sono-assisted photocatalytic degradation of a well-known antibiotic (ciprofloxacin; CIP) in aquatic media using a g-C3N4/NH2-UiO-66 (Zr) catalyst under visible light irradiation. Initially, the catalyst was prepared by a simple method, and its physiochemical features were thoroughly analyzed by XRD, FT-IR, FE-SEM, EDX, EDS-Dot-Mapping, and UV-Vis analytical techniques. After that, the impact of several influential factors affecting the performance of the applied sono-assisted photocatalytic process such as the initial concentration of CIP, solution pH, catalyst dosage, light intensity, and ultrasound power was fully assessed, and the optimal conditions were established. After 75 min of the sono-assisted photocatalytic treatment, the complete degradation of CIP (10 mg/L) was accomplished under the condition as follows: g-C3N4/NH2-UiO-66 (Zr), 0.6 g/L; pH, 5.0, and ultrasound power, light intensity 75 mw/cm2, 200 W/m2. Meanwhile, the photocatalytic degradation of CIP followed the pseudo-first-order kinetic model. In addition, the scavenger experiments demonstrated that OH˚ and O2°- radicals played a key role in the sono-assisted photocatalytic degradation process. It is also acknowledged that the applied catalyst was reused for five consecutive runs with a minor loss observed in its degradation efficiency. In a further experiment, a significant synergistic effect with regard to the degradation of CIP was observed once all three major parameters (visible light, ultrasound waves, and catalyst) were used in combination compared to each used alone. To sum up, it is thought that the integration of g-C3N4/MOF-based catalyst, ultrasound waves, and visible light irradiation could be potentially applied as a promising strategy for the degradation of various pharmaceuticals on account of high degradation performance, simple operation, excellent reusability, and eco-friendly approach.
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Affiliation(s)
- Mojtaba Yeganeh
- Research Center for Environmental Health Technology Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | | | - Sevda Fallah
- Student Research Committee, Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshty University of Medical Science, Tehran, Iran
| | - Mahnaz Ghambarian
- Iranian Research and Development Center for Chemical Industries, ACECR, Tehran, Iran
| | - Ali Esrafili
- Research Center for Environmental Health Technology Iran University of Medical Sciences, Tehran, Iran.
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
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Jha PK, Pokhum C, Soison P, Techato KA, Chawengkijwanich C. Comparative study of zinc oxide nanocomposites with different noble metals synthesized by biological method for photocatalytic disinfection of Escherichia coli present in hospital wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 88:1564-1577. [PMID: 37768755 PMCID: wst_2023_272 DOI: 10.2166/wst.2023.272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Binary zinc oxide (ZnO) nanocomposites with different noble metals, silver (Ag) and ruthenium (Ru), were prepared from an aqueous leaf extract of Callistemon viminalis. The biosynthesized photocatalysts were characterized and examined for their photocatalytic disinfection against Escherichia coli isolated from hospital wastewater. The influence of the different noble metals showed a difference in physicochemical characteristics and photocatalytic efficiency between Ag-ZnO and Ru-ZnO. The photocatalytic degradation of methylene blue and photocatalytic disinfection were found to be in the order Ag-ZnO > Ru-ZnO > ZnO. The photocatalytic disinfection of Ag-ZnO reached a 75% reduction in 60 min, compared to 34 and 9% reductions of Ru-ZnO and ZnO, respectively. The kinetic reaction rate for the photocatalytic disinfection of Ag-ZnO was found to be 2.8 times higher than that of Ru-ZnO. The outstanding photocatalytic activity of Ag-ZnO over Ru-ZnO was attributed to higher crystallinity, greater UVA adsorption capacity, smaller particle size, and the additional antimicrobial effect of Ag itself. The C. viminalis-mediated Ag-ZnO nanocomposites can be a potential candidate for photocatalytic disinfection of drug-resistant E. coli in hospital wastewater.
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Affiliation(s)
- Pankaj Kumar Jha
- Department of Sustainable Energy Management, Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkla 90110, Thailand E-mail:
| | - Chonlada Pokhum
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand
| | - Pichai Soison
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand; School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Pracha Uthit Road, Bang Mod, Bangkok 10140, Thailand
| | - Kua-Anan Techato
- Department of Sustainable Energy Management, Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkla 90110, Thailand
| | - Chamorn Chawengkijwanich
- National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand
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Mota DR, Martini WDS, Pellosi DS. Influence of Ag size and shape in dye photodegradation using silver nanoparticle/ZnO nanohybrids and polychromatic light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:57667-57682. [PMID: 36967428 DOI: 10.1007/s11356-023-26580-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/16/2023] [Indexed: 05/10/2023]
Abstract
In this work, we propose zinc oxide (ZnO) surface functionalization with plasmonic silver nanoparticles (AgNP) of different sizes and shapes (spheres, prisms, and rods) creating ZnO/AgNP nanohybrids. These were characterized by UV-Vis spectroscopy, X-ray diffraction, transmission electron microscopy, Fourier-transform infrared spectroscopy, diffuse reflectance spectroscopy, and photoluminescence spectroscopy. Surface functionalization with AgNP improved photocatalyst electronic properties, its visible light absorption, and slow electron/hole recombination on the ZnO surface. Photocatalysis assays performed with a polychromatic Hg lamp degraded methyl orange, a model of persistent organic pollutant in water. A systematic study showed that the photodegradation kinetics of the nanohybrids are significantly more efficient than pure ZnO (up to 18 times) and that AgNP size and especially its shape are important in dye degradation. Mechanistic studies revealed that degradation occurred by direct dye reduction on the ZnO surface holes, ZnO electron transfer to Ag followed by •O2- formation, and direct injection of AgNP hot electrons in the ZnO conduction band. The last effect was stronger for anisotropic AgNP, which explains their high kinetic degradation rates. Therefore, the rational design in ZnO/AgNP nanohybrid engineering and a systematic approach used in this manuscript allowed a detailed description of photodegradation process that occur at ZnO/AgNP interface. Our results are not conclusive about AgNP size; on the other hand, it clearly demonstrates that anisotropic nanoparticles (as Ag rods and prims) present superior photodegradation efficiency and are promising particles for further large-scale use of solar-irradiated nanohybrids.
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Affiliation(s)
- Danielle Ramos Mota
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of São Paulo, Rua São Nicolau 210, Diadema, SP, 09913-030, Brazil
| | - William da Silva Martini
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of São Paulo, Rua São Nicolau 210, Diadema, SP, 09913-030, Brazil
| | - Diogo Silva Pellosi
- Laboratory of Hybrid Materials, Department of Chemistry, Federal University of São Paulo, Rua São Nicolau 210, Diadema, SP, 09913-030, Brazil.
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Mokhtarizad A, Amiri P, Behin J. Ozonation/UV irradiation of dispersed Ag/AgI nanoparticles in water resources: stability and aggregation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:23192-23212. [PMID: 36318409 DOI: 10.1007/s11356-022-23812-0] [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: 04/27/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Proliferation of nanoparticles (NPs) as aqueous pollutants is a matter of growing concern today. The aggregation kinetics of colloidal bare silver (Ag, 20.5 nm) and silver iodide (AgI, 15.3 nm) NPs were investigated during ozone/ultraviolet (O3/UV) oxidation. Dynamic light scattering was applied to monitor the aggregation of NPs, and the z-average of treated samples was considered aggregate diameter. The effect of temperature, pH, and initial concentration of NPs was investigated on the aggregation rate constant and stability ratio. At a short oxidation period of approximately 1 min, the lower stability ratio was achieved for Ag NPs (< 50) than AgI NPs (> 100). Under acidic conditions, the negative surface charge of both NPs was neutralized that resulted in faster aggregation. In contrast, the impact of temperature and initial concentration of NPs on the aggregation rate was different for both NPs, which was due to the type of O3/UV interaction with the surface of NPs and the thickness of the electrical double layer surrounding the NPs. The aggregation behavior of Ag NPs obeyed diffusion-limited regime, while an intermediate regime between diffusion- and reaction-limited was observed for AgI NP aggregation. The resulting aggregate morphologies showed that the clusters were ramified for Ag and compressed for AgI NPs. Applying the O3/UV oxidation process for water treatment purposes leads to a significant reduction in aggregation time for inherently unstable Ag and stable AgI toxic NPs from several hours or days to several minutes.
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Affiliation(s)
- Atefeh Mokhtarizad
- Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran
| | - Pegah Amiri
- Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran
| | - Jamshid Behin
- Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran.
- Artificial Intelligence Division, Advanced Chemical Engineering Research Center, Razi University, Kermanshah, Iran.
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Simultaneously photocatalytic removal of Cr(VI) and metronidazole by asynchronous cross-linked modified sodium alginate. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Ghorbani M, Solaimany Nazar AR, Frahadian M, Khosravi M. Facile synthesis of Z-scheme ZnO-nanorod @ BiOBr-nanosheet heterojunction as efficient visible-light responsive photocatalyst: The effect of electrolyte and scavengers. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113930] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Cai H, Zhang D, Ma X, Ma Z. A novel ZnO/biochar composite catalysts for visible light degradation of metronidazole. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120633] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Ehsan M, Waheed A, Ullah A, Kazmi A, Ali A, Raja NI, Mashwani ZUR, Sultana T, Mustafa N, Ikram M, Li H. Plant-Based Bimetallic Silver-Zinc Oxide Nanoparticles: A Comprehensive Perspective of Synthesis, Biomedical Applications, and Future Trends. BIOMED RESEARCH INTERNATIONAL 2022; 2022:1215183. [PMID: 35535038 PMCID: PMC9078794 DOI: 10.1155/2022/1215183] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/26/2022] [Accepted: 04/07/2022] [Indexed: 12/17/2022]
Abstract
The universal emphasis on the study of green nanotechnology has led to biologically harmless uses of wide-ranged nanomaterials. Nanotechnology deals with the production of nanosized particles with regular morphology and properties. Various researches have been directed on nanomaterial synthesis by physical, chemical, and biological means. Understanding the safety of both environment and in vivo, a biogenic approach particularly plant-derived synthesis is the best strategy. Silver-zinc oxide nanoparticles are most effective. Moreover, these engineered nanomaterials via morphological modifications attain improved performance in antimicrobial, biomedical, environmental, and therapeutic applications. This article evaluates manufacturing strategies for silver-zinc oxide nanoparticles via plant-derived means along with highlighting their broad range of uses in bionanotechnology.
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Affiliation(s)
- Maria Ehsan
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Abdul Waheed
- Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Abd Ullah
- Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele 848300, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Abeer Kazmi
- Department of Biotechnology, Faculty of Chemical and Life Sciences, Abdul Wali Khan University Mardan (AWKUM), Mardan, Pakistan
- Department of Genetics, Institute of Hydrobiology, University of Chinese Academy of Sciences (UCAS), Wuhan, China
| | - Amir Ali
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Naveed Iqbal Raja
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | | | - Tahira Sultana
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Nilofar Mustafa
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Muhammad Ikram
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Huanyong Li
- Binzhou Vocational College, Binzhou 256603, China
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Rajan MS, John A, Thomas J. Nanophotocatalysis for the Removal of Pharmaceutical Residues from
Water Bodies: State of Art and Recent Trends. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411017666210412095354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Background:
The occurrence of pharmaceuticals in surface and drinking water is ubiquitous
and is a major concern of researchers. These compounds cause a destructive impact on
aquatic and terrestrial life forms, and the removal of these compounds from the environment is a
challenging issue. Existent conventional wastewater treatment processes are generally inefficacious
because of their low degradation efficiency and inadequate techniques associated with the disposal
of adsorbed pollutants during comparatively effective methods like the adsorption process.
Remediation Method:
Semiconductor-mediated photocatalysis is an attractive technology for the
efficient removal of pharmaceutical compounds. Among various semiconductors, TiO2 and ZnObased
photocatalysts gained much interest during the last years because of their efficiency in decomposing
and mineralizing the lethal organic pollutants with the utilization of UV-visible light.
Incessant efforts are being undertaken for tuning the physicochemical, optical, and electronic properties
of these photocatalysts to strengthen their overall photocatalytic performance with good recycling
efficiency.
Results:
This review attempts to showcase the recent progress in the rational design and fabrication
of nanosized TiO2 and ZnO photocatalysts for the removal of pollutants derived from the pharmaceutical
industry and hospital wastes.
Conclusion:
Photocatalysis involving TiO2 and ZnO provides a positive impact on pollution management
and could be successfully applied to remove pharmaceuticals from wastewater streams.
Structure modifications, the introduction of heteroatoms, and the integration of polymers with
these nano photocatalysts offer leapfrogging opportunities for broader applications in the field of
photocatalysis.
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Affiliation(s)
- Mekha Susan Rajan
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
| | - Anju John
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
| | - Jesty Thomas
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
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Design and Microwave-Assisted Synthesis of TiO2-Lanthanides Systems and Evaluation of Photocatalytic Activity under UV-LED Light Irradiation. Catalysts 2021. [DOI: 10.3390/catal12010008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The TiO2-Eu and TiO2-La systems were successfully synthesized using the microwave method. Based on the results of X-ray diffraction analysis, it was found that regardless of the analyzed systems, two crystal structures were noted for the obtained samples: anatase and rutile. The analysis, such as XPS and EDS, proved that the doped lanthanum and europium nano-particles are present only on the TiO2 surface without disturbing the crystal lattice. In the synthesized systems, there were no significant changes in the bandgap energy. Moreover, all the obtained systems were characterized by high thermal stability. One of the key objectives of the work, and a scientific novelty, was the introduction of UV-LED lamps into the metronidazole photo-oxidation pathway. The results of the photo-oxidation study showed that the obtained TiO2 systems doped with selected lanthanides (Eu or La) show high efficiency in the removal of metronidazole, and at the same consuming nearly 10 times less electricity compared to conventional UV lamps (high-pressure mercury lamp). Liquid-chromatography mass-spectrometry (LC-MS) analysis of an intermediate solution showed the presence of fragments of the degraded molecule by m/z 114, 83, and 60, prompting the formulation of a plausible photodegradation pathway for metronidazole.
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Baruah R, Yadav A, Das AM. Livistona jekinsiana fabricated ZnO nanoparticles and their detrimental effect towards anthropogenic organic pollutants and human pathogenic bacteria. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 251:119459. [PMID: 33497974 DOI: 10.1016/j.saa.2021.119459] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 01/01/2021] [Accepted: 01/07/2021] [Indexed: 06/12/2023]
Abstract
An environment-friendly and economically sound method was developed to achieve a multi-functional ZnO nanoparticles (ZnO NPs) using water extract of Livistona jekinsiana. The ZnO NPs absorbed maximum wavelength of light at 332 nm in UV-Visible spectroscopy (UV/Vis). X-Ray Diffraction (XRD) pattern revealed the crystallinity of the nanoparticles with the crystallite size around 22.45 nm. The geometry, shape, size, and elemental composition were determined by Transmission Electron Microscope (TEM) and Energy Dispersive Spectroscopy (EDS). The presence of phytochemicals and the typical zinc-oxygen group in the ZnO NPs was implied by Fourier Transform Infrared spectroscopy (FTIR). Photo luminescence spectroscopy (PL), and Dynamic Light Scattering (DLS) techniques were also used to characterize and study the different features of ZnO NPs. The multifunctional ZnO NPs showed an efficient photodegradative effect towards the degradation of two anthropogenic dyes, methyl orange (MO) and methylene blue (MB) under solar radiation. The degradation reaction of MO and MB was compliantwithzero-order kinetics and first-order kinetics respectively. Also, Livistona jekinsiana fabricated ZnO NPs showed potential Antibacterial activity against S. aureus, B. subtilis, E. coli and K. pneumonia bacteria and effective antioxidant activity using DPPH scavenging assay. The mechanism of the antibacterial activity was established by estimating the ROS generation and percentage of DNA in K. pneumonia cell. The study illustrated the reducing and stabilizing property of the Livistona jekinsiana extract as a novel source and potential photodegradative and therapeutic effects of the ZnO NPs.
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Affiliation(s)
- Rebika Baruah
- Natural Product Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam 785006, India; Academy of Scientific and Innovative Research, CSIR-NEIST Campus, India
| | - Archana Yadav
- Biotechnology Group, Biological Science and Technology Division, CSIR- North East Institute of Science and Technology, Jorhat, Assam 785006, India
| | - Archana Moni Das
- Natural Product Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, Assam 785006, India; Academy of Scientific and Innovative Research, CSIR-NEIST Campus, India.
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Synthesis, Characterization and Photocatalytic Activity of MoS2/ZnSe Heterostructures for the Degradation of Levofloxacin. Catalysts 2020. [DOI: 10.3390/catal10121380] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Antibiotics have been extensively used over the last few decades. Due to their extensive usage and persistence in the environment, they are considered as emergent pollutants. It is, therefore, important to synthesize new materials for efficient antibiotic degradation. Herein, we report the MoS2/ZnSe heterostructures prepared by a simple ultrasonication method. Heterostructures were prepared with different ratios of MoS2 and ZnSe, i.e., 1:3, 1:1 and 3:1. Characterization of the heterostructures was done by UV-vis diffused reflectance spectroscopy (UV-vis-DRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and photoluminescence (PL) techniques to understand the morphology and surface chemistry. The results show that an efficient interface was formed to harness the visible light and degrade levofloxacin, which was monitored by gradual decreases in the UV-vis absorbance signal of levofloxacin. Among the prepared heterostructures and their pure counter parts, MoS2/ZnSe 3:1 (3:1 MZ) showed a better degradation activity of 73.2% as compared to pure MoS2 (29%) and ZnSe (17.1%) in the presence of visible light in a time span of two hours. The reusability studies showed that the catalytic performance of 3:1 MZ did not decrease significantly after three cycles. Moreover, the morphology and the crystal structure also remained unchanged.
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