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Shabanian-Broujeni E, Nezamzadeh-Ejhieh A. The coupled WO 3-AgBr nanocatalyst, part II: Synthesis, characterization, and the boosted photocatalytic activity towards metronidazole in an aqueous solution. Heliyon 2024; 10:e31353. [PMID: 38813214 PMCID: PMC11133908 DOI: 10.1016/j.heliyon.2024.e31353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/08/2024] [Accepted: 05/15/2024] [Indexed: 05/31/2024] Open
Abstract
The AgBr and WO3 nanoparticles (NPs) were synthesized and coupled, and the coupled AgBr-WO3 binary catalyst, as well as the individual AgBr and WO3 NPs, were then characterized by XRD, FTIR, DRS, and SEM-EDX. XRD results showed the formation of orthorhombic WO3 cubic AgBr crystals. The crystallite sizes of 45, 28, and 45 nm were estimated by the Scherrer formula for the as-prepared AgBr, WO3, and AgBr-WO3 catalysts, respectively. The DRS study estimated band gap energies using both absorption edge wavelengths and the Kubelka-Munk model. The band gap energies of 2.72, 3.06, and 2.92 eV were obtained for the direct electronic transitions of AgBr, WO3, and AgBr-WO3. The ECB (potential position) of AgBr and WO3 were estimated to be 0.01 and 0.52 V, while their EVB values were 2.60 and 3.55 V, respectively. Typical FTIR absorption bands of W‒OH, the W‒O‒W, and AgBr bonds have appeared at 1637 cm-1, 823 (and 766) cm-1, and 1384 cm-1, respectively. The pHpzc of 4 was estimated for the individual and coupled catalysts. In studying the photocatalytic activity of the catalysts in the photodegradation of metronidazole (MNZ) a boosted activity was achieved for the coupled system. This increased activity depends on the maximum AgBr:WO3 mole ratio in a 1:3 mol ratio. Grinding time applied to prepare the coupled catalyst has also varied the photocatalytic activity.
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Affiliation(s)
- Elaheh Shabanian-Broujeni
- Department of Chemistry, Shahreza Branch, Islamic Azad University, 311-86145, Shahreza, Isfahan, Iran
| | - Alireza Nezamzadeh-Ejhieh
- Department of Chemistry, Shahreza Branch, Islamic Azad University, 311-86145, Shahreza, Isfahan, Iran
- Razi Chemistry Research Center (RCRC), Shahreza Branch, Islamic Azad University, Isfahan, Iran
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2
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Kim KS, Couillard M, Tang Z, Shin H, Poitras D, Cheng C, Naboka O, Ruth D, Plunkett M, Chen L, Gaburici L, Lacelle T, Nganbe M, Zou Y. Continuous synthesis of high-entropy alloy nanoparticles by in-flight alloying of elemental metals. Nat Commun 2024; 15:1450. [PMID: 38365786 PMCID: PMC10873330 DOI: 10.1038/s41467-024-45731-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 02/01/2024] [Indexed: 02/18/2024] Open
Abstract
High-entropy alloy (HEA) nanoparticles (NPs) exhibit unusual combinations of functional properties. However, their scalable synthesis remains a significant challenge requiring extreme fabrication conditions. Metal salts are often employed as precursors because of their low decomposition temperatures, yet contain potential impurities. Here, we propose an ultrafast (< 100 ms), one-step method that enables the continuous synthesis of HEA NPs directly from elemental metal powders via in-flight alloying. A high-temperature plasma jet ( > 5000 K) is employed for rapid heating/cooling (103 - 105 K s-1), and demonstrates the synthesis of CrFeCoNiMo HEA NPs ( ~ 50 nm) at a high rate approaching 35 g h-1 with a conversion efficiency of 42%. Our thermofluid simulation reveals that the properties of HEA NPs can be tailored by the plasma gas which affects the thermal history of NPs. The HEA NPs demonstrate an excellent light absorption of > 96% over a wide spectrum, representing great potential for photothermal conversion of solar energy at large scales. Our work shows that the thermal plasma process developed could provide a promising route towards industrial scale production of HEA NPs.
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Affiliation(s)
- Keun Su Kim
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada.
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada.
- Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, K1N 6N5, Canada.
| | - Martin Couillard
- Energy, Mining and Environment Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Ziqi Tang
- Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Homin Shin
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Daniel Poitras
- Advanced Electronics and Photonics Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Changjun Cheng
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Olga Naboka
- Construction Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Dean Ruth
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Mark Plunkett
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Lixin Chen
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
| | - Liliana Gaburici
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Thomas Lacelle
- Security and Disruptive Technologies Research Centre, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
| | - Michel Nganbe
- Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
| | - Yu Zou
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON, M5S 3G8, Canada
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Klenen J, Sauerwein F, Vittadello L, Kömpe K, Hreb V, Sydorchuk V, Yakhnevych U, Sugak D, Vasylechko L, Imlau M. Gap-Free Tuning of Second and Third Harmonic Generation in Mechanochemically Synthesized Nanocrystalline LiNb 1-xTa xO 3 (0 ≤ x ≤ 1) Studied with Nonlinear Diffuse Femtosecond-Pulse Reflectometry. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:317. [PMID: 38334588 PMCID: PMC10857201 DOI: 10.3390/nano14030317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/13/2024] [Accepted: 01/23/2024] [Indexed: 02/10/2024]
Abstract
The tuning of second (SHG) and third (THG) harmonic emission is studied in the model system LiNb 1-xTa xO 3 (0≤x≤1, LNT) between the established edge compositions lithium niobate (LiNbO 3, x=0, LN) and lithium tantalate (LiTaO 3, x=1, LT). Thus, the existence of optical nonlinearities of the second and third order is demonstrated in the ferroelectric solid solution system, and the question about the suitability of LNT in the field of nonlinear and quantum optics, in particular as a promising nonlinear optical material for frequency conversion with tunable composition, is addressed. For this purpose, harmonic generation is studied in nanosized crystallites of mechanochemically synthesized LNT using nonlinear diffuse reflectometry with wavelength-tunable fundamental femtosecond laser pulses from 1200 nm to 2000 nm. As a result, a gap-free harmonic emission is validated that accords with the theoretically expected energy relations, dependencies on intensity and wavelength, as well as spectral bandwidths for harmonic generation. The SHG/THG harmonic ratio ≫1 is characteristic of the ferroelectric bulk nature of the LNT nanocrystallites. We can conclude that LNT is particularly attractive for applications in nonlinear optics that benefit from the possibility of the composition-dependent control of mechanical, electrical, and/or optical properties.
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Affiliation(s)
- Jan Klenen
- Department of Mathematics/Informatics/Physics, Osnabrueck University, 49076 Osnabrueck, Germany
- Research Center for Cellular Nanoanalytics, Osnabrueck (CellNanOs), Osnabrueck University, 49076 Osnabrueck, Germany
| | - Felix Sauerwein
- Department of Mathematics/Informatics/Physics, Osnabrueck University, 49076 Osnabrueck, Germany
- Research Center for Cellular Nanoanalytics, Osnabrueck (CellNanOs), Osnabrueck University, 49076 Osnabrueck, Germany
| | - Laura Vittadello
- Department of Mathematics/Informatics/Physics, Osnabrueck University, 49076 Osnabrueck, Germany
- Research Center for Cellular Nanoanalytics, Osnabrueck (CellNanOs), Osnabrueck University, 49076 Osnabrueck, Germany
| | - Karsten Kömpe
- Research Center for Cellular Nanoanalytics, Osnabrueck (CellNanOs), Osnabrueck University, 49076 Osnabrueck, Germany
- Department of Biology/Chemistry, Osnabrueck University, 49076 Osnabrueck, Germany
| | - Vasyl Hreb
- Department of Semiconductor Electronics, Lviv Polytechnic National University, 79013 Lviv, Ukraine (L.V.)
| | - Volodymyr Sydorchuk
- Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, 13 Gen. Naumov St., 03164 Kyiv, Ukraine
| | - Uliana Yakhnevych
- Department of Semiconductor Electronics, Lviv Polytechnic National University, 79013 Lviv, Ukraine (L.V.)
| | - Dmytro Sugak
- Department of Semiconductor Electronics, Lviv Polytechnic National University, 79013 Lviv, Ukraine (L.V.)
- Scientific Research Company ‘Electron-Carat’, 79031 Lviv, Ukraine
| | - Leonid Vasylechko
- Department of Semiconductor Electronics, Lviv Polytechnic National University, 79013 Lviv, Ukraine (L.V.)
| | - Mirco Imlau
- Department of Mathematics/Informatics/Physics, Osnabrueck University, 49076 Osnabrueck, Germany
- Research Center for Cellular Nanoanalytics, Osnabrueck (CellNanOs), Osnabrueck University, 49076 Osnabrueck, Germany
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Norouzi A, Nezamzadeh-Ejhieh A. Synergistic photocatalytic effect of α-Fe 2O 3-ZnO binary nanocatalyst toward methylene blue: An experimental design study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 310:123888. [PMID: 38241932 DOI: 10.1016/j.saa.2024.123888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/21/2024]
Abstract
Due to the potential ecosystem protection and management applications, searching for highly optimized semiconductor-based solar energy photocatalysts is still a significant challenge. Coupled α-Fe2O3-ZnO nanoparticles were prepared in situ and characterized by various identification techniques such as XRD, SEM-EDX, TEM, DRS, and FT-IR. Its pHpzc was about 8.1. The band gap energies of ZnO, α-Fe2O3, and the coupled α-Fe2O3-ZnO system were 3.22, 2.08, and 2.09 eV, respectively. The boosted photocatalytic activity of the coupled catalysts was designed via the RSM approach, and the optimal RSM conditions were pH 5, 25 min irradiation time, and 0.3 g/L of the α-Fe2O3-ZnO containing 75 % ZnO. The center point conditions' run included 0.5 g/L of the coupled catalyst containing 50 % ZnO, pH 7, and 22.5 min illumination time. The study on scavenger agents showed the highest role of hydroxyl radicals in MB photodegradation by the proposed catalyst.
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Affiliation(s)
- Abbas Norouzi
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran
| | - Alireza Nezamzadeh-Ejhieh
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P.O. Box 311-86145, Shahreza, Isfahan, Iran; Department of Chemistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.
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Sertkol M, Slimani Y, Almessiere M, Baykal A, Akhtar S, Polat E, Caliskan S. Magnetic and optical characterizations of Dy-Eu co-substituted Mn0.5Zn0.5Fe2O4 nanospinel ferrites. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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6
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Hemmatpour P, Nezamzadeh-Ejhieh A. A Z-scheme CdS/BiVO 4 photocatalysis towards Eriochrome black T: An experimental design and mechanism study. CHEMOSPHERE 2022; 307:135925. [PMID: 35952786 DOI: 10.1016/j.chemosphere.2022.135925] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/24/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
The synergistic photocatalytic activity was obtained when CdS and BiVO4 nanoparticles (NPs) were coupled. The samples were characterized by XRD, FTIR, SEM-EDX, and UV-DRS techniques, and their pHpzc was also estimated. The crystallite size of the coupled sample was estimated at 37.3 and 12.5 nm by the Scherrer and Williamson-Hall equations, respectively. The band gaps and the potential positions of VB and CB levels of the semiconductors used were determined. The highest boosted photocatalytic activity was obtained when the CdS: BiVO4 mole ratio was 1:1. RSM studied the simultaneous interactions between the selected variables, and the model F-value of 110.61> F0.05, 14, 13 = 2.4 accompanied by the LOF F-value of 5.20 < F0.05, 10, 3 = 8.79 confirm the model significance. The correlation coefficients of R2 = 0.9861, the adjusted R2 = 0.9710, and the predicted R2 = 0.9417, also establish a satisfactory model for processing the experimental data. In the scavenging agent study, photodegradation mechanisms were suggested; among them, the direct Z-scheme mechanism is more favorable for illustrating the EBT-photodegradation by the binary CdS-BiVO4 photocatalyst. The proposed system, especially the direct Z-scheme mechanism, is suitable as a potential hydrogen production system.
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Affiliation(s)
- Pooneh Hemmatpour
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P. O. Box, 311-86145, Shahreza, Isfahan, Islamic Republic of Iran.
| | - Alireza Nezamzadeh-Ejhieh
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P. O. Box, 311-86145, Shahreza, Isfahan, Islamic Republic of Iran.
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7
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Farsi M, Nezamzadeh-Ejhieh A. A coupled Cobalt(II) oxide-Silver Tungstate nano-photocatalyst: Moderate characterization and evaluation of the photocatalysis kinetics towards methylene blue in aqueous solution. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Sol–gel reaction of titanium phosphonate alkoxide cluster. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Almessiere M, Güner S, Slimani Y, Baykal A, Shirsath SE, Korkmaz AD, Badar R, Manikandan A. Investigation on the structural, optical, and magnetic features of Dy3+ and Y3+ co-doped Mn0.5Zn0.5Fe2O4 spinel ferrite nanoparticles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131412] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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da Silva FD, Bortolotto T, Tirloni B, Daudt NDF, Lang ES, Cargnelutti R. Bis(2-pyridyl)ditellane as a precursor to Co II, Cu I and Cu II complex formation: structural characterization and photocatalytic studies. NEW J CHEM 2022. [DOI: 10.1039/d2nj02761e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination compounds containing bis(2-pyridyl)ditellane as a precursor and transition metals are described. The cobalt-containing photocatalysts are active for H2 production.
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Affiliation(s)
- Felipe Dornelles da Silva
- Department of Chemistry, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
| | - Tanize Bortolotto
- Department of Chemistry, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
| | - Bárbara Tirloni
- Department of Chemistry, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
| | - Natália de Freitas Daudt
- Department of Mechanical Engineering, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
| | - Ernesto Schulz Lang
- Department of Chemistry, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
| | - Roberta Cargnelutti
- Department of Chemistry, Federal University of Santa Maria, Av. Roraima, n.1000, 97105-900, Santa Maria, RS, Brazil
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11
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NIR-to-NIR Imaging: Extended Excitation Up to 2.2 μm Using Harmonic Nanoparticles with a Tunable hIGh EneRgy (TIGER) Widefield Microscope. NANOMATERIALS 2021; 11:nano11123193. [PMID: 34947542 PMCID: PMC8706685 DOI: 10.3390/nano11123193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 11/22/2022]
Abstract
Near-infrared (NIR) marker-based imaging is of growing importance for deep tissue imaging and is based on a considerable reduction of optical losses at large wavelengths. We aim to extend the range of NIR excitation wavelengths particularly to values beyond 1.6 μm in order to profit from the low loss biological windows NIR-III and NIR-IV. We address this task by studying NIR-excitation to NIR-emission conversion and imaging in the range of 1200 up to 2400 nm at the example of harmonic Mg-doped lithium niobate nanoparticles (i) using a nonlinear diffuse femtosecond-pulse reflectometer and (ii) a Tunable hIGh EneRgy (TIGER) widefield microscope. We successfully demonstrate the existence of appropriate excitation/emission configurations in this spectral region taking harmonic generation into account. Moreover, NIR-imaging using the most striking configurations NIR-III to NIR-I, based on second harmonic generation (SHG), and NIR-IV to NIR-I, based on third harmonic generation (THG), is demonstrated with excitation wavelengths from 1.6–1.8 μm and from 2.1–2.2 μm, respectively. The advantages of the approach and the potential to additionally extend the emission range up to 2400 nm, making use of sum frequency generation (SFG) and difference frequency generation (DFG), are discussed.
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12
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Ansari F, Sheibani S, Caudillo-Flores U, Fernández-García M. Titania-decorated copper oxide nanophotocatalyst powder: A stable and promoted photocatalytic active system. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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S SR, H S L, K R N. Fabrication of spectroscopic characterization techniques using an optical fiber-based spectrometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:093104. [PMID: 34598507 DOI: 10.1063/5.0054308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
High-sensitive spectroscopy instruments have been developed to measure thermoluminescence emission (TLE), diffuse reflectance, and photoluminescence (PL). The key features of these instruments are low cost, high resolution, and compact size. For TLE measurement, A Kanthal resistive heating strip with a linear heating rate and Ocean Optics spectra suite software were used. Thermally stimulated emission of light was recorded using a USB4000+ES spectrophotometer in the UV-Vis region. In the TLE spectra, intensity vs wavelength was recorded as a function of temperature. In the high instance TLE spectrum of Al2O3, Tm3+ measured at 458 K shows peaks at 298, 355, 394, 466, 526, 658, 672, 696, and 713 nm. The UV-Vis DRS spectrum of the ZnO powder sample was measured at room temperature in the wavelength range 230-750 nm. The optical bandgap of ZnO was determined using Kubelka-Munk theory and found to be 3.22 eV. In the PL setup, a xenon lamp as the excitation source, direct-attach cuvette holder, visible light filter, IR filter, and adjustable UV bandpass linear variable filter were used. The excitation wavelength was fixed using a filter, and the emission spectra of samples were recorded. In the PL emission spectrum of Al2O3, Tb3+ shows bands at 382, 420, 438, 462, 487, 543, 586, and 623 nm, which are characteristic of Tb3+ ions. The obtained PL results are compared with data acquired using the Hitachi (F-2700) fluorescence spectrometer. This cost-effective spectroscopy instrument will be beneficial in materials science research in order to investigate the optical properties of the materials by study of TLE, PL, and diffuse reflectance.
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Affiliation(s)
- Satyanarayana Reddy S
- Department of Physics, Dr. Ambedkar Veedhi, Bengaluru City University, Bengaluru 560001, India
| | - Lokesha H S
- Cr Research Group, Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg, South Africa
| | - Nagabhushana K R
- Postgraduate Program in Interdisciplinary Health Science, Campus Baixada Santista, Federal University of São Paulo, CEP 11070-100 Santos, SP, Brazil
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14
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da Silva FD, Hennemann AL, Burrow RA, Lang ES, Abram U, dos Santos SS. Bis(2-pyridyl)ditellane as a Precursor for [HgTe]-Based Clusters and Zwitterionic Compounds. J CLUST SCI 2021. [DOI: 10.1007/s10876-021-02128-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Kinetic Modeling for Photo-Assisted Penicillin G Degradation of (Mn 0.5Zn 0.5)[Cd xFe 2-x]O 4 (x ≤ 0.05) Nanospinel Ferrites. NANOMATERIALS 2021; 11:nano11040970. [PMID: 33918847 PMCID: PMC8070312 DOI: 10.3390/nano11040970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/24/2021] [Accepted: 04/06/2021] [Indexed: 12/01/2022]
Abstract
Penicillin G is an old and widely used antibiotic. Its persistence in the environment started to appear in many environmental samples and food chains. The removal of these emerging pollutants has been a challenging task for scientists in the last decades. The photocatalytic properties of Cd2+ doped Manganese- Zinc NSFs with chemical formula (Mn0.5Zn0.5)[CdxFe2−x]O4 (0.0 ≤ x ≤ 0.05) NSFs are herein evaluated. The Manganese- Zinc N.S.F.s nanomaterials were deeply characterized, utilizing UV-Vis (reflectance) spectroscopy, X-ray diffraction, N2 adsorption isotherm measurements, and S.E.M., SEM-EDX mapping, and T.E.M. The Kinetic model for the photodegradation of penicillin G (as a model molecule) is investigated using visible light as a source of energy. The kinetic study shows that our results fit well with the modified pseudo-first-order model. The Pen G degradation are 88.73%, 66.65%, 44.70%, 37.62% and 24.68% for x = 0.5, 0.4, 0.3, 0.2 and 0.1, respectively, against 14.68% for the free Cd spinel sample. The pseudo-rate constant is bandgap dependent. From the intra-diffusion rate constant (Kd), we developed an intra-diffusion time (τ) model, which decreases exponentially as a function of (x) and mainly shows the existence of three different domains versus cadmium coordination in spinel ferrite samples. Hence, Cadmium’s presence generates spontaneous polarization with a strong opportunity to monitor the charge separation and then open the route to a new generation of “assisted” photocatalysts under visible light.
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Ivanin SN, Buzko VY, Goryachko AI, Panyushkin VT. Optical and Magnetic Properties of a Heteroligand Complex of Gadolinium Stearate with Acetyl Acetone. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421020114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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18
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Preparation, characterization, and investigation of the catalytic property of α-Fe2O3-ZnO nanoparticles in the photodegradation and mineralization of methylene blue. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137587] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Gesesse GD, Gomis-Berenguer A, Barthe MF, Ania CO. On the analysis of diffuse reflectance measurements to estimate the optical properties of amorphous porous carbons and semiconductor/carbon catalysts. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112622] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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