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Annadurai H, Vengudusamy R, Chen SM, Kao CR. Facile stoichiometric interfacial surface bonded cerium oxide and graphene oxide heterostructure for efficient electrochemical non-enzymatic detection of dopamine. J Mater Chem B 2024. [PMID: 39229782 DOI: 10.1039/d4tb01729c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2024]
Abstract
Emerging technology in the new era of sensors to detect and quantify neurological reaction-based research has demanded the development of sensors for the neurotransmitter dopamine (DA). In recent decades, electrochemical sensors have offered rapid and sensitive detection of DA, but the presence of interfering compounds, such as uric acid (UA) and ascorbic acid (AA), poses a great threat to the development of DA sensors. Additionally, reusing traditional methods leads to challenges like prolonged preparation and expensive instruments. This research work offers a nanohybrid two-dimensional (2D) paper-like graphene oxide (GO) and three-dimensional (3D) cerium oxide nanosphere (CeONS) heterostructure composite (G-CeONS) created via stoichiometric synthesis for the non-enzymatic detection of DA oxidation in the presence of other complex biological compounds. The constructed G-CeONS nanohybrid composite enables enhanced selectivity and sensitivity towards DA detection through its interfacial engineering. The heterostructure formation of a 2D nanosheet draped over 3D nanospheres exhibits a wide linear concentration range of 100-30 800 nM with a low detection limit of 20.98 nM. Further investigation of the real-time performance on human saliva and DA injections afforded prominent results. In addition, the synergetic effect of G-CeONS improves DA detection accuracy and reliability towards enabling transformational neurochemical and medicinal applications.
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Affiliation(s)
- Hemarani Annadurai
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan.
| | - Renganathan Vengudusamy
- Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 106, Taiwan.
| | - C R Kao
- Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
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2
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Fauzia, Khan MA, Chaman M, Azam A. Antibacterial and sunlight-driven photocatalytic activity of graphene oxide conjugated CeO 2 nanoparticles. Sci Rep 2024; 14:6606. [PMID: 38503811 PMCID: PMC10951321 DOI: 10.1038/s41598-024-54905-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 02/18/2024] [Indexed: 03/21/2024] Open
Abstract
This work focuses on the structural, morphological, optical, photocatalytic, antibacterial properties of pure CeO2 nanoparticles (NPs) and graphene oxide (GO) based CeO2 nanocomposites (GO-1/CeO2, GO-5/CeO2, GO-10/CeO2, GO-15/CeO2), synthesized using the sol-gel auto-combustion and subsequent sonication method, respectively. The single-phase cubic structure of CeO2 NPs was confirmed by Rietveld refined XRD, HRTEM, FTIR and Raman spectroscopy. The average crystallite size was calculated using Debye Scherrer formula and found to increase from 20 to 25 nm for CeO2 to GO-15/CeO2 samples, respectively. The related functional groups were observed from Fourier transform infrared (FTIR) spectroscopy, consistent with the outcomes of Raman spectroscopy. The optical band gap of each sample was calculated by using a Tauc plot, which was observed to decrease from 2.8 to 1.68 eV. The valence state of Ce (Ce3+ and Ce4+) was verified using X-ray photoelectron spectroscopy (XPS) for CeO2 and GO-10/CeO2. The poisonous methylene blue (MB) dye was used to evaluate the photocatalytic activity of each sample in direct sunlight. The GO-15/CeO2 nanocomposite showed the highest photocatalytic activity with rate constant (0.01633 min-1), and it degraded the MB dye molecules by 100% within 120 min. The high photocatalytic activity of this material for degrading MB dye establishes it as an outstanding candidate for wastewater treatment. Further, these nanocomposites also demonstrated excellent antimicrobial activity against Pseudomonas aeruginosa PAO1.
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Affiliation(s)
- Fauzia
- Department of Applied Physics, Z.H. College of Engineering & Technology, Aligarh Muslim University, Aligarh, 202002, India
| | - Mo Ahamad Khan
- Department of Microbiology, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, UP, 202002, India
| | - Mohd Chaman
- Mewat Engineering College, Nuh, Mewat, Haryana, 122107, India
| | - Ameer Azam
- Department of Applied Physics, Z.H. College of Engineering & Technology, Aligarh Muslim University, Aligarh, 202002, India.
- Department of Physics, Faculty of Science, Islamic University of Madinah, 42351, Madinah, Saudi Arabia.
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3
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Ali Al Saidi AK, Ghazanfari A, Baek A, Tegafaw T, Ahmad MY, Zhao D, Liu Y, Yang JU, Park JA, Yang BW, Chae KS, Nam SW, Chang Y, Lee GH. Ultrasmall cerium oxide nanoparticles as highly sensitive X-ray contrast agents and their antioxidant effect. RSC Adv 2024; 14:3647-3658. [PMID: 38268539 PMCID: PMC10805080 DOI: 10.1039/d3ra08372a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 01/15/2024] [Indexed: 01/26/2024] Open
Abstract
Owing to their theranostic properties, cerium oxide (CeO2) nanoparticles have attracted considerable attention for their key applications in nanomedicine. In this study, ultrasmall CeO2 nanoparticles (particle diameter = 1-3 nm) as X-ray contrast agents with an antioxidant effect were investigated for the first time. The nanoparticles were coated with hydrophilic and biocompatible poly(acrylic acid) (PAA) and poly(acrylic acid-co-maleic acid) (PAAMA) to ensure satisfactory colloidal stability in aqueous media and low cellular toxicity. The synthesized nanoparticles were characterized using high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, cell viability assay, photoluminescence spectroscopy, and X-ray computed tomography (CT). Their potential as X-ray contrast agents was demonstrated by measuring phantom images and in vivo CT images in mice injected intravenously and intraperitoneally. The X-ray attenuation of these nanoparticles was greater than that of the commercial X-ray contrast agent Ultravist and those of larger CeO2 nanoparticles reported previously. In addition, they exhibited an antioxidant effect for the removal of hydrogen peroxide. The results confirmed that the PAA- and PAAMA-coated ultrasmall CeO2 nanoparticles demonstrate potential as highly sensitive radioprotective or theranostic X-ray contrast agents.
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Affiliation(s)
| | - Adibehalsadat Ghazanfari
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ahrum Baek
- Institute of Biomedical Engineering, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Tirusew Tegafaw
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Mohammad Yaseen Ahmad
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Dejun Zhao
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ying Liu
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
| | - Ji-Ung Yang
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Ji Ae Park
- Division of Applied RI, Korea Institute of Radiological & Medical Sciences Seoul 01812 South Korea
| | - Byeong Woo Yang
- Theranocure Medlifescience Bldg. 1, Chilgok, Bukgu Taegu 41405 South Korea
| | - Kwon Seok Chae
- Department of Biology Education, Teachers' College, Kyungpook National University Taegu 41566 South Korea
| | - Sung-Wook Nam
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Yongmin Chang
- Department of Molecular Medicine, School of Medicine, Kyungpook National University Taegu 41944 South Korea
| | - Gang Ho Lee
- Department of Chemistry, College of Natural Sciences, Kyungpook National University Taegu 41566 South Korea
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García-Casas I, Montes A, de los Santos DM, Valor D, Pereyra C, de la Ossa EM. Generation of high-porosity cerium oxide nanoparticles and their functionalization with caryophyllene oxide using supercritical carbon dioxide. J Supercrit Fluids 2023. [DOI: 10.1016/j.supflu.2023.105901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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5
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Kalaycıoğlu Z, Özuğur Uysal B, Pekcan Ö, Erim FB. Efficient Photocatalytic Degradation of Methylene Blue Dye from Aqueous Solution with Cerium Oxide Nanoparticles and Graphene Oxide-Doped Polyacrylamide. ACS OMEGA 2023; 8:13004-13015. [PMID: 37065069 PMCID: PMC10099124 DOI: 10.1021/acsomega.3c00198] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
A cerium oxide nanoparticles (CeO2-NPs)/graphene oxide (GO)/polyacrylamide (PAM) ternary composite was synthesized through free-radical polymerization of acrylamide in the presence of CeO2 nanoparticles and GO in an aqueous system. The synthesized composite material was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy techniques and applied for the photocatalytic degradation of methylene blue (MB) dye from an aqueous solution. Tauc's model for direct transition was used to model for the optical band gap. The key operating parameters such as the amounts of CeO2-NPs and GO, pH, initial MB concentration, type of light irradiation, and contact time have been optimized to achieve the highest MB degradation percentage. The photocatalysis process was pH-dependent, and the optimum pH value was found to be 12.0. Under UV-A light, 90% dye degradation occurred in 90 min. The degradation of MB was also specified in terms of total organic carbon (TOC) and chemical oxygen demand (COD). Free-radical capture experiments were also performed to determine the role of radical species during the photocatalytic oxidation process. The photocatalytic process showed that the equilibrium data is in good agreement with the Langmuir-Hinshelwood kinetic model. A rate constant of 0.0259 min-1 was obtained. The hydrogel was also tested to assess its reusability, which is an important key factor in practical wastewater treatment. The photocatalytic activity only decreased to 75% after nine uses.
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Affiliation(s)
- Zeynep Kalaycıoğlu
- Department
of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
| | - Bengü Özuğur Uysal
- Faculty
of Engineering and Natural Sciences, Kadir
Has University, Cibali, Fatih, Istanbul 34083, Turkey
| | - Önder Pekcan
- Faculty
of Engineering and Natural Sciences, Kadir
Has University, Cibali, Fatih, Istanbul 34083, Turkey
| | - F. Bedia Erim
- Department
of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
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6
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Sehar S, Rasool T, Syed HM, Mir MA, Naz I, Rehman A, Shah MS, Akhter MS, Mahmood Q, Younis A. Recent advances in biodecolorization and biodegradation of environmental threatening textile finishing dyes. 3 Biotech 2022; 12:186. [PMID: 35875175 PMCID: PMC9304469 DOI: 10.1007/s13205-022-03247-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 07/02/2022] [Indexed: 11/01/2022] Open
Abstract
Organic nature of dyes and their commercially made products are widely utilized in many industries including paper, cosmetics, pharmaceuticals, photography, petroleum as well as in textile manufacturing. The textile industry being the top most consumer of a large variety of dyes during various unit processes operation generates substantial amount of wastewater; hence, nominated as "Major Polluter of Potable Water". The direct discharge of such effluents into environment poses serious threats to the functioning of biotic communities of natural ecosystems. The detection of these synthetic dyes is considered as relatively easy, however, it is extremely difficult to completely eliminate them from wastewater and freshwater ecosystems. Aromatic chemical structure seems to be the main reason behind low biodegradability of these dyes. Currently, various physiochemical and biological methods are employed for their remediation. Among them, microbial degradation has attracted greater attention due to its sustainability, high efficiency, cost effectiveness, and eco-friendly nature. The current review presents recent advances in biodegradation of industrial dyes towards a sustainable and tangible technological innovative solutions as an alternative to existing conventional physicochemical treatment processes.
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Affiliation(s)
- Shama Sehar
- Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Sakhir, Kingdom of Bahrain
| | - Tabassum Rasool
- Department of Microbiology, Quaid-i-Azam University, Islamabad, 45320 Pakistan
| | - Hasnain M. Syed
- Department of Mathematics and Natural Sciences, Prince Mohammad Bin Fahd University, P.O. Box 1664, Al Khobar, 31952 Kingdom of Saudi Arabia
| | - M. Amin Mir
- Department of Mathematics and Natural Sciences, Prince Mohammad Bin Fahd University, P.O. Box 1664, Al Khobar, 31952 Kingdom of Saudi Arabia
| | - Iffat Naz
- Department of Biology, Deanship of Educational Services, Qassim University, Buraidah, 51452 Kingdom of Saudi Arabia
| | - Abdul Rehman
- Department of Microbiology, Kohat University of Science & Technology (KUST), Khyber Pakhtunkhwa, Kohat, 26000 Pakistan
| | - Mir Sadiq Shah
- Department of Zoology, University of Science and Technology, Bannu, 28100 Khyber Pakhtunkhwa Pakistan
| | - Mohammad Salim Akhter
- Department of Chemistry, College of Science, University of Bahrain, P.O. Box 32038, Sakhir, Kingdom of Bahrain
| | - Qaisar Mahmood
- Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Sakhir, Kingdom of Bahrain
| | - Adnan Younis
- Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Sakhir, Kingdom of Bahrain
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7
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Ghrib T, Al-Otaibi AL, Massoudi I, Alsagry AM, Aljaber AS, Alhussain EA, Alrubian WS, Brini S, Gondal MA, Elsayed KA, Kayed TS. Effect of europium doping on the microstructural, optical and photocatalytic properties of ZnO nanopowders. ARAB JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1080/25765299.2022.2071525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Taher Ghrib
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Amal L. Al-Otaibi
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Imen Massoudi
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Albandri M. Alsagry
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Azhar S. Aljaber
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Ethar A. Alhussain
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Wasan S. Alrubian
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, City Dammam, Saudi Arabia
| | - Sami Brini
- Basic and Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
- Department of Mathematics, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Mohammed A. Gondal
- Laser Research Group, Physics Department, Center of Excellence in Nanotechnology, & K.A.CARE Energy Research and Innovation Center, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Khaled A. Elsayed
- Basic Engineering Sciences Department, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Tarek S. Kayed
- Basic Engineering Sciences Department, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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8
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Al-Najar B, Younis A, Hazeem L, Sehar S, Rashdan S, Shaikh MN, Albuflasa H, Hankins NP. Thermally induced oxygen related defects in eco-friendly ZnFe 2O 4 nanoparticles for enhanced wastewater treatment efficiencies. CHEMOSPHERE 2022; 288:132525. [PMID: 34653481 DOI: 10.1016/j.chemosphere.2021.132525] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/30/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
Herein, a simple but highly effective strategy of thermal annealing to modulate oxygen vacancies related defects in ZnFe2O4 (ZFO) nanoparticles for obtaining enhanced wastewater treatment efficiencies is reported. The as-prepared nanoparticles were thermally annealed at three different temperatures (500 °C, 600 °C and 700 °C) and their phase purity was confirmed by X-ray diffraction (XRD). All samples were found to exhibit pure phases of ZFO with different crystallite sizes ranging from 10 nm to 25 nm. The transmission electron microscope (TEM) images showed well dispersed nanoparticles and a strong correlation of grain size growth with annealing temperature was established. The optical absorption and emission characteristics were estimated through UV-visible and Photoluminescence (PL) spectroscopy. Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) confirmed the variation of oxygen vacancies in the synthesized samples' lattice. The photocatalytic activities of all samples were investigated and the highest efficiencies were recorded for the ZFO samples annealed at 500 °C. Under high salinity condition, the organic dye degradation efficiency of the same sample remained the highest among all. The excellent dye degradation abilities in ZFO samples can be attributed to the abundance of oxygen vacancies in the crystal lattice that slow down the recombination rate during the photocatalysis process. Moreover, cytotoxicity tests revealed that all prepared ZFO samples showed insignificant cell structure effects on Picochlorum sp microalgae, as verified by Fourier-transform infrared (FTIR) spectroscopy. On the other hand, no significant changes were detected on the viable cell concentration and Chlorophyll a content. This work presents a systematic way to finely tune the crystal sizes and to modulate oxygen related defects in ZFO through a highly effective annealing approach to signify their potential in industrial wastewater and seawater treatment processes.
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Affiliation(s)
- Basma Al-Najar
- Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain.
| | - Adnan Younis
- Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain
| | - Layla Hazeem
- Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain
| | - Shama Sehar
- Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain
| | - Suad Rashdan
- Department of Chemistry, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain
| | - M Nasiruzzaman Shaikh
- Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia
| | - Hanan Albuflasa
- Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Sakhir Campus, Bahrain
| | - Nicholas P Hankins
- Department of Engineering Science, The University of Oxford, Parks Road, OX3 1PJ, Oxford, UK
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Ghereghlou M, Esmaeili AA, Darroudi M. Adsorptive Removal of Methylene Blue from Aqueous Solutions Using Magnetic Fe3O4@C-dots: Removal and kinetic studies. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2029490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mahnaz Ghereghlou
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Abbas Ali Esmaeili
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Majid Darroudi
- Nuclear Medicine Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medical Biotechnology and Nanotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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10
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Hasanpour M, Motahari S, Jing D, Hatami M. Investigation of operation parameters on the removal efficiency of methyl orange pollutant by cellulose/zinc oxide hybrid aerogel. CHEMOSPHERE 2021; 284:131320. [PMID: 34198060 DOI: 10.1016/j.chemosphere.2021.131320] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/03/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
In this study, Cellulose/Zinc Oxide-x (CA/ZnO-x) hybrid aerogel with various concentrations of Zn2+ ion is synthesized through the hydrothermal method and used for organic pollutant removal. The CA/ZnO-x hybrid aerogel was characterized by XRD, UV-Visible, DRS, FTIR, FESEM, EDS, BET, LC-MS-MS analyses. In the present study, CA/ZnO-x hybrid aerogel as photocatalyst was used to investigate the influence of the photocatalytic degradation of methyl orange (MO) from an aqueous solution under UV irradiation. The morphology of CA/ZnO-x hybrid aerogels exhibited that the ZnO rice grain-like shape were successfully synthesized on the cellulose aerogel matrix. Also, the influence of various factors such as photocatalyst dosage, pH, initial concentration of MO, and irradiation intensity was investigated on the photocatalytic degradation rate of MO. The results revealed that the highest degradation efficiency and mineralization rate of MO were about 99.02% and 51.68%, respectively, after 90 min under UV irradiation using CA/ZnO-0.4 photocatalyst when pH = 3, C0 = 10 ppm, photocatalyst dose = 9 g L-1 under the 300 W UV light irradiation. Furthermore, the synthesized photocatalyst exhibited a considerable firmness and easily separated from an aqueous solution for reuse.
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Affiliation(s)
- Maryam Hasanpour
- Department of Polymer Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, 11155-4563, Tehran, Iran.
| | - Siamak Motahari
- Department of Polymer Engineering, School of Chemical Engineering, College of Engineering, University of Tehran, 11155-4563, Tehran, Iran.
| | - Dengwei Jing
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - Mohammad Hatami
- Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, 91775-1111, Iran.
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11
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Miran HA, Jaf ZN, Altarawneh M, Jiang ZT. An Insight into Geometries and Catalytic Applications of CeO 2 from a DFT Outlook. Molecules 2021; 26:6485. [PMID: 34770889 PMCID: PMC8588098 DOI: 10.3390/molecules26216485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022] Open
Abstract
Rare earth metal oxides (REMOs) have gained considerable attention in recent years owing to their distinctive properties and potential applications in electronic devices and catalysts. Particularly, cerium dioxide (CeO2), also known as ceria, has emerged as an interesting material in a wide variety of industrial, technological, and medical applications. Ceria can be synthesized with various morphologies, including rods, cubes, wires, tubes, and spheres. This comprehensive review offers valuable perceptions into the crystal structure, fundamental properties, and reaction mechanisms that govern the well-established surface-assisted reactions over ceria. The activity, selectivity, and stability of ceria, either as a stand-alone catalyst or as supports for other metals, are frequently ascribed to its strong interactions with the adsorbates and its facile redox cycle. Doping of ceria with transition metals is a common strategy to modify the characteristics and to fine-tune its reactive properties. DFT-derived chemical mechanisms are surveyed and presented in light of pertinent experimental findings. Finally, the effect of surface termination on catalysis by ceria is also highlighted.
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Affiliation(s)
- Hussein A. Miran
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Zainab N. Jaf
- Department of Physics, College of Education for Pure Science, Ibn Al-Haitham, University of Baghdad, Baghdad 10071, Iraq;
| | - Mohammednoor Altarawneh
- Department of Chemical and Petroleum Engineering, United Arab Emirates University, Sheikh Khalifa Bin Zayed Street, Al-Ain 15551, United Arab Emirates
| | - Zhong-Tao Jiang
- Surface Analysis and Materials Engineering Research Group, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA 6150, Australia;
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Sehar S, Hazeem LJ, Naz I, Rehman A, Sun W, Alhewairini SS, Thani ASB, Akhter MS, Younis A. Facile synthesis of zero valent sulfur nanoparticles for catalytic detoxification of hexavalent chromium, cytotoxicity against microalgae and ultraviolet protection properties. KOREAN J CHEM ENG 2021. [DOI: 10.1007/s11814-021-0868-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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