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Fast and efficient green synthesis of CaWO4 NPs using eggshells as a biogenic calcium source: structure, optical property, and morphology. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Precise Sn-Doping Modulation for Optimizing CdWO 4 Nanorod Photoluminescence. Int J Mol Sci 2022; 23:ijms232315123. [PMID: 36499454 PMCID: PMC9736181 DOI: 10.3390/ijms232315123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/05/2022] Open
Abstract
The cadmium tungstate rods have been given much attention due to their potential for usage in numerous luminescent applications. We have prepared single crystalline Sn-doped Cd1-xSnxWO4 (where x = 0, 1, 3, and 5%) nanorods (NRDs) and characterized them using refined X-ray diffraction and TEM analysis, revealing a monoclinic phase and a crystallite size that decreased from 62 to 38 nm as Sn concentration increased. Precise Sn doping modulation in CdWO4 NRDs causes surface recombination of electrons and holes, which causes the PL intensity to decrease as the Sn content rises. The chromaticity diagram shows that an increase in the Sn content caused a change in the emission color from sky blue to light green, which was attributed to the increased defect density. The photoluminescence time decay curve of all samples fit well with double-order exponential decay, and the average decay lifetime was found to be 1.11, 0.93, and 1.16 ns for Cd1-xSnxWO4, x = 0, 1, and 5%, respectively. This work provides an understanding of the behavior of Sn-doped CdWO4 NRDs during electron transitions and the physical nature of emission that could be used in bio-imaging, light sources, displays, and other applications.
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Pereira PFDS, De Foggi CC, Gouveia AF, Pinatti IM, Cabral LA, Guillamon E, Sorribes I, San-Miguel MA, Vergani CE, Simões AZ, da Silva EZ, Cavalcante LS, Llusar R, Longo E, Andrés J. Disclosing the Biocide Activity of α-Ag2−2xCuxWO4 (0 ≤ x ≤ 0.16) Solid Solutions. Int J Mol Sci 2022; 23:ijms231810589. [PMID: 36142511 PMCID: PMC9504239 DOI: 10.3390/ijms231810589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 02/02/2023] Open
Abstract
In this work, α-Ag2−2xCuxWO4 (0 ≤ x ≤ 0.16) solid solutions with enhanced antibacterial (against methicillin-resistant Staphylococcus aureus) and antifungal (against Candida albicans) activities are reported. A plethora of techniques (X-ray diffraction with Rietveld refinements, inductively coupled plasma atomic emission spectrometry, micro-Raman spectroscopy, attenuated total reflectance–Fourier transform infrared spectroscopy, field emission scanning electron microscopy, ultraviolet–visible spectroscopy, photoluminescence emissions, and X-ray photoelectron spectroscopy) were employed to characterize the as-synthetized samples and determine the local coordination geometry of Cu2+ cations at the orthorhombic lattice. To find a correlation between morphology and biocide activity, the experimental results were sustained by first-principles calculations at the density functional theory level to decipher the cluster coordinations and electronic properties of the exposed surfaces. Based on the analysis of the under-coordinated Ag and Cu clusters at the (010) and (101) exposed surfaces, we propose a mechanism to explain the biocide activity of these solid solutions.
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Affiliation(s)
- Paula Fabiana dos Santos Pereira
- CDMF, LIEC, Department of Chemistry, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-905, SP, Brazil
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Camila Cristina De Foggi
- Department of Conservative Dentistry, Faculty of Dental Sciences, Federal University of Rio Grande do Sul, Rio Grande do Sul 90035-004, RS, Brazil
| | - Amanda Fernandes Gouveia
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
- Institute of Chemistry, State University of Campinas (Unicamp), Campinas 13083-859, SP, Brazil
| | - Ivo Mateus Pinatti
- Department of Chemistry, Federal University of Maranhao, Avenida dos Portugueses, 1966, São Luís 65080-805, MA, Brazil
| | - Luís Antônio Cabral
- Institute of Physics, “Gleb Wataghin” (IFGW), State University of Campinas, Campinas 13083-859, SP, Brazil
| | - Eva Guillamon
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Iván Sorribes
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Miguel A. San-Miguel
- Institute of Chemistry, State University of Campinas (Unicamp), Campinas 13083-859, SP, Brazil
| | - Carlos Eduardo Vergani
- Departamento de Materiais Odontológicos e Prótese, Faculdade de Odontologia de Araraquara, São Paulo State University (UNESP), P.O. Box 1680, Araraquara 14801-903, SP, Brazil
| | - Alexandre Zirpoli Simões
- Faculty of Engineering of Guaratinguetá, São Paulo State University (UNESP), Guaratinguetá 12516-410, SP, Brazil
| | - Edison Z. da Silva
- Institute of Physics, “Gleb Wataghin” (IFGW), State University of Campinas, Campinas 13083-859, SP, Brazil
| | - Laécio Santos Cavalcante
- PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina 64002-150, PI, Brazil
| | - Rosa Llusar
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
| | - Elson Longo
- CDMF, LIEC, Department of Chemistry, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-905, SP, Brazil
| | - Juan Andrés
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), 12071 Castelló, Spain
- Correspondence:
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da Silva Sousa G, Xavier Nobre F, Valério Botelho do Nascimento M, da Cunha Mendes O, Manzato L, Leyet Ruiz Y, Brito WR, Rogério da Costa Couceiro P, Elias de Matos JM. Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag 1.94Cu 0.06MoO 4 Solid Solution. Inorg Chem 2022; 61:1530-1537. [PMID: 34990147 DOI: 10.1021/acs.inorgchem.1c03245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Corner-truncated cubic β-Ag1.94Cu0.06MoO4 microcrystals were synthesized using the hydrothermal method. These were investigated by X-ray diffraction, confirming obtention of the spinel structure Fd3̅m. Through Raman spectroscopy are confirmed all modes for the point group of Oh7. The Egap shows a decrease of the band gap from 3.20 to 3.07 eV, with reduction of the conduction band occurring from -0.20 eV (β-Ag2MoO4) to -0.13 eV (β-Ag1.94Cu0.06MoO4), suggesting a p-type behavior for the Cu2+ ion. The field-emission scanning electron microscopy images confirm the morphological changes for β-Ag2MoO4, where potato-like microcrystals were found. Meanwhile, corner-truncated cubic microcrystals for β-Ag1.94Cu0.06MoO4. The photoluminescence (PL) spectrum confirms the increase in the PL emission for β-Ag1.94Cu0.06MoO4, with suppression of the deep defects occurring in the structure caused by oxygen and silver atoms. In contrast, the green region is intensified because of distortions of the Ag-O and Mo-O bonds. Therefore, the β-Ag1.94Cu0.06MoO4 solid solution has PL emission with CCT (4510 K) and CIE coordinates (x = 0.372 and y = 0.433), which could be interesting properties for applications as light-emitting diodes.
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Affiliation(s)
- Giancarlo da Silva Sousa
- Programa de Pós-Graduação em Química, Centro de Ciências da Natureza, Campus Ministro Petrônio Portela, Universidade Federal do Piauí, 64049-550 Teresina, Brazil
| | - Francisco Xavier Nobre
- Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Campus Coari, Estrada Coari-Itapéua, 69460-000 Coari, Brazil
| | - Marcus Valério Botelho do Nascimento
- Pós-Graduação em Engenharia e Ciências dos Materiais, Departmento de Engenharia de Materiais, Universidade Federal do Amazonas, Avenida Rodrigo Otávio, 69067-005 Manaus, Brazil
| | - Otoniel da Cunha Mendes
- FENTONLAB, Coordenação de Ciclo Báciso, Escola Superior de Tecnologia, Universidade do Estado do Amazonas, Avenida Darcy Vagas 1200, 59050-020 Manaus, Brazil
| | - Lizandro Manzato
- Pós-Graduação em Engenharia e Ciências dos Materiais, Departmento de Engenharia de Materiais, Universidade Federal do Amazonas, Avenida Rodrigo Otávio, 69067-005 Manaus, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, Campus Manaus Distrito Industrial, Manaus, Avenida Gov. Danilo Aerosa 1731, 69075-351 Manaus, Brazil
| | - Yurimiler Leyet Ruiz
- Pós-Graduação em Engenharia e Ciências dos Materiais, Departmento de Engenharia de Materiais, Universidade Federal do Amazonas, Avenida Rodrigo Otávio, 69067-005 Manaus, Brazil.,Departamento de Engenharia de Materiais, Universidade Federal do Amazonas, Avenida Rodrigo Otávio, 69067-005 Manaus, Brazil
| | - Walter Ricardo Brito
- Departamento de Química, Universidade Federal do Amazonas, Avenida Rodrigo Otávio, 69067-005 Manaus, Brazil
| | | | - José Milton Elias de Matos
- Departamento de Química, Universidade Federal do Piauí, Campus Ministro Petrônio Portela, 64049-550 Teresina, Brazil
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Mirsadeghi S, Zandavar H, Tooski HF, Rahimi M, Sohouli E, Rahimi-Nasrabadi M, Ganjali MR, Pourmortazavi SM. Rapid photodegradation and detection of zolpidem over β-SnWO 4 and α-SnWO 4 nanoparticles: optimization and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:5430-5442. [PMID: 32968898 DOI: 10.1007/s11356-020-10820-1] [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: 06/10/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
We reported the tin (II) tungstate nanoparticles as the photocatalyst and sensor modifier that were synthesized via chemical precipitation reaction and optimized thru the Taguchi design method. The method predicted the best synthesis conditions that led to smaller particles and desired morphologies. Different techniques were used to characterize the chemical structure, morphology, and purity of the nanoparticles. The photocatalytic behavior of different crystalline forms of the SnWO4 nanoparticles (α and β) was considered by photodegradation of methylene orange and zolpidem under UV light irradiation, while the average size of β-SnWO4 and α-SnWO4 nanoparticles prepared in optimum conditions is about 17 nm and 20 nm, respectively. Efficiencies of degradation of methyl orange and zolpidem on β-SnWO4, in the presence of UV irradiation, were 93% and 98% and in the presence of α-SnWO4 were 73% and 82% after 2100 s, respectively. Voltammetric sensing of zolpidem was designed by modification of carbon paste electrode via β-SnWO4 nanoparticles and investigated for determination of the drug in aqueous solution.
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Affiliation(s)
- Somayeh Mirsadeghi
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, 1411713137, Iran.
| | - Hamed Zandavar
- Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box 16765-3454, Tehran, Iran
| | - Hamed Farhad Tooski
- Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box 16765-3454, Tehran, Iran
| | - Mostafa Rahimi
- Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box 16765-3454, Tehran, Iran
| | - Esmail Sohouli
- Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mehdi Rahimi-Nasrabadi
- Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Faculty of Pharmacy, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
- Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Seied Mahdi Pourmortazavi
- Faculty of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box 16765-3454, Tehran, Iran.
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