1
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Gonzaga IMD, Gonçalves R, Fernandes CHM, Assis M, Teixeira IF, Mascaro LH. Efficient photoelectrochemical real textile wastewater detoxification using photoanodes of C 3N 4-BiVO 4. Chemosphere 2024; 352:141315. [PMID: 38286308 DOI: 10.1016/j.chemosphere.2024.141315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/15/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024]
Abstract
Photoelectrochemical systems utilizing solar energy have garnered significant attention for their sustainability in remediating contaminated water. This study focuses on advancing photoanode development through the utilization of carbon nitrides (C3N4) and bismuth vanadate (BiVO4), two promising semiconductor materials renowned for their efficient electron-hole pair separation leading to enhanced photocatalytic activity. Four distinct materials were synthesized and compared: BiVO4 over C3N4, C3N4 over BiVO4, and pristine BiVO4 and C3N4. Upon electrochemical analysis, the C3N4-BiVO4 heterostructure exhibited the highest photoelectrocatalytic charge transfer constant, mobility, and lifetime of charge carriers. Capitalizing on these exceptional properties, the composite was applied to remove organic matter real effluent from the textile industry. The photoelectrodegradation of the effluent demonstrated substantial removal of Total Organic Carbon (TOC) and the generation of low toxicity degradation products, accompanied by low energy consumption. The compelling results underscore the high potential of the synthesized C3N4-BiVO4 heterostructure for industrial applications, particularly in addressing environmental challenges associated with textile industry effluents.
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Affiliation(s)
- Isabelle M D Gonzaga
- LIEC-Interdisciplinary Laboratory of Electrochemistry and Ceramics, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil.
| | - Roger Gonçalves
- LIEC-Interdisciplinary Laboratory of Electrochemistry and Ceramics, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Carlos H M Fernandes
- LIEC-Interdisciplinary Laboratory of Electrochemistry and Ceramics, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Marcelo Assis
- Department of Analytical and Physical Chemistry, University Jaume I, Castelló, 12071, Spain
| | - Ivo F Teixeira
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | - Lucia H Mascaro
- LIEC-Interdisciplinary Laboratory of Electrochemistry and Ceramics, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
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2
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Assis M, Ribeiro LK, Gonçalves MO, Staffa LH, Paiva RS, Lima LR, Coelho D, Almeida LF, Moraes LN, Rosa ILV, Mascaro LH, Grotto RMT, Sousa CP, Andrés J, Longo E, Cruz SA. Polypropylene Modified with Ag-Based Semiconductors as a Potential Material against SARS-CoV-2 and Other Pathogens. ACS Appl Polym Mater 2022; 4:7102-7114. [PMID: 36873928 PMCID: PMC9972354 DOI: 10.1021/acsapm.2c00744] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 09/05/2022] [Indexed: 06/18/2023]
Abstract
The worldwide outbreak of the coronavirus pandemic (COVID-19) and other emerging infections are difficult and sometimes impossible to treat, making them one of the major public health problems of our time. It is noteworthy that Ag-based semiconductors can help orchestrate several strategies to fight this serious societal issue. In this work, we present the synthesis of α-Ag2WO4, β-Ag2MoO4, and Ag2CrO4 and their immobilization in polypropylene in the amounts of 0.5, 1.0, and 3.0 wt %, respectively. The antimicrobial activity of the composites was investigated against the Gram-negative bacterium Escherichia coli, the Gram-positive bacterium Staphylococcus aureus, and the fungus Candida albicans. The best antimicrobial efficiency was achieved by the composite with α-Ag2WO4, which completely eliminated the microorganisms in up to 4 h of exposure. The composites were also tested for the inhibition of SARS-CoV-2 virus, showing antiviral efficiency higher than 98% in just 10 min. Additionally, we evaluated the stability of the antimicrobial activity, resulting in constant inhibition, even after material aging. The antimicrobial activity of the compounds was attributed to the production of reactive oxygen species by the semiconductors, which can induce high local oxidative stress, causing the death of these microorganisms.
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Affiliation(s)
- Marcelo Assis
- Department
of Physical and Analytical Chemistry, University
Jaume I (UJI), Castelló 12071, Spain
| | - Lara K. Ribeiro
- Department
of Physical and Analytical Chemistry, University
Jaume I (UJI), Castelló 12071, Spain
- CDMF,
LIEC, Federal University of São Carlos
- (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Mariana O. Gonçalves
- Biomolecules
and Microbiology Laboratory (LaMiB), Biotechnology Graduation Program
(PPGBiotec), Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
| | - Lucas H. Staffa
- Chemistry
Department, Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
- Department
of Materials Engineering, Federal University
of São Carlos - (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Robert S. Paiva
- Chemistry
Department, Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
| | - Lais R. Lima
- Chemistry
Department, Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
| | - Dyovani Coelho
- CDMF,
LIEC, Federal University of São Carlos
- (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Lauana F. Almeida
- School of
Agriculture, São Paulo State University
(Unesp), Botucatu, SP, 18610-034, Brazil
- Molecular
Laboratory of Clinical Hospital of Botucatu, Medical School, São Paulo State University (Unesp), Botucatu, SP, 18618-687, Brazil
| | - Leonardo N. Moraes
- School of
Agriculture, São Paulo State University
(Unesp), Botucatu, SP, 18610-034, Brazil
- Molecular
Laboratory of Clinical Hospital of Botucatu, Medical School, São Paulo State University (Unesp), Botucatu, SP, 18618-687, Brazil
| | - Ieda L. V. Rosa
- CDMF,
LIEC, Federal University of São Carlos
- (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Lucia H. Mascaro
- CDMF,
LIEC, Federal University of São Carlos
- (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Rejane M. T. Grotto
- School of
Agriculture, São Paulo State University
(Unesp), Botucatu, SP, 18610-034, Brazil
- Molecular
Laboratory of Clinical Hospital of Botucatu, Medical School, São Paulo State University (Unesp), Botucatu, SP, 18618-687, Brazil
| | - Cristina P. Sousa
- Biomolecules
and Microbiology Laboratory (LaMiB), Biotechnology Graduation Program
(PPGBiotec), Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
| | - Juan Andrés
- Department
of Physical and Analytical Chemistry, University
Jaume I (UJI), Castelló 12071, Spain
| | - Elson Longo
- CDMF,
LIEC, Federal University of São Carlos
- (UFSCar), São Carlos, SP, 13565-905 Brazil
| | - Sandra A. Cruz
- Chemistry
Department, Federal University of São
Carlos (UFSCar), São
Carlos, SP, 13565-905, Brazil
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3
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Moreira AJ, Lemos SG, Coelho D, Mascaro LH, Freschi GPG, Pereira EC. UV-Vis spectrophotometry coupled to chemometric analysis for the performance evaluation of atrazine photolysis and photocatalysis. Environ Sci Pollut Res Int 2022; 29:24010-24023. [PMID: 34820752 DOI: 10.1007/s11356-021-17687-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
In this study, a spectrophotometric-chemometric (Spec-Chem) approach was applied as an alternative to chromatography to monitor ATZ and by-products after photolytic and photocatalytic oxidation aiming to unveil the ATZ degradation mechanism. Spec-Chem is an accessible, easy-to-operate, low-cost analytical approach to monitor atrazine (ATZ) and by-products, and its applicability was validated by HPLC, the reference technique for the evaluation of pollutant degradation mechanisms. The chromatographic (DChro) and spectrophotometric (DSpec) data found 95% and 57% ATZ removal after 30 min, respectively, proving that the DSpec erroneously induces a 38% loss in removal efficiency. When DSpec was treated by multivariate curve resolution (MCR) analysis for providing chemometric data (DChem), it found ATZ removal and hydroxyatrazine (HAT) formation statistically equal to DChro (t-test, p = 0.05). After unraveling the ATZ degradation mechanism using Spec-Chem, a new hypothesis for the kinetic calculation of ATZ degradation was presented, where the concentrations of ATZ and HAT were used to find k and R2 values representative for the ATZ degradation mechanism. The values found for k were compatible with the literature under similar conditions of ATZ degradation, and the linear correlation coefficients (R2 = 0.99) showed an optimal fit for the proposed hypothesis. Thus, Spec-Chem was successfully applied to unravel the mechanism of photocatalytic degradation of ATZ in the presence of TiO2, while k was obtained by the new hypothesis proposed that considered ATZ and HAT concentration as parameters of kinetic interest. Therefore, the importance of monitoring quantitatively ATZ and HAT were provided in this study, providing new information for the scientific community.
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Affiliation(s)
- Ailton J Moreira
- Chemistry Department, Universidade Federal de São Carlos, São Carlos, SP, Brazil.
- Universidade Federal de Alfenas, Campus Poços de Caldas, Poços de Caldas, MG, Brazil.
| | - Sherlan G Lemos
- Department of Chemistry, Federal University of Paraíba, João Pessoa, PB, Brazil
| | - Dyovani Coelho
- Chemistry Department, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Lucia H Mascaro
- Chemistry Department, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Gian P G Freschi
- Universidade Federal de Alfenas, Campus Poços de Caldas, Poços de Caldas, MG, Brazil
| | - Ernesto C Pereira
- Chemistry Department, Universidade Federal de São Carlos, São Carlos, SP, Brazil
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4
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Gromboni MF, Cordeiro-Junior PJM, Corradini P, Mascaro LH, Lanza MRDV. One-step preparation of Co 2V 2O 7: synthesis and application as Fenton-like catalyst in gas diffusion electrode. Phys Chem Chem Phys 2022; 24:10249-10262. [DOI: 10.1039/d2cp00072e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bimetallic oxides and MOFs have been employed as catalysts for ORR via two-electron and Fenton-based processes. This work reports the development of a new green one-step route for obtaining Co2V2O7....
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5
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Abrantes-Coutinho VE, Santos AO, Moura RB, Pereira-Junior FN, Mascaro LH, Morais S, Oliveira TMBF. Systematic review on lectin-based electrochemical biosensors for clinically relevant carbohydrates and glycoconjugates. Colloids Surf B Biointerfaces 2021; 208:112148. [PMID: 34624598 DOI: 10.1016/j.colsurfb.2021.112148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/27/2022]
Abstract
Carbohydrates and glycoconjugates are involved in numerous natural and pathological metabolic processes, and the precise elucidation of their biochemical functions has been supported by smart technologies assembled with lectins, i.e., ubiquitous proteins of nonimmune origin with carbohydrate-specific domains. When lectins are anchored on suitable electrochemical transducers, sensitive and innovative bioanalytical tools (lectin-based biosensors) are produced, with the ability to screen target sugars at molecular levels. In addition to the remarkable electroanalytical sensitivity, these devices associate specificity, precision, stability, besides the possibility of miniaturization and portability, which are special features required for real-time and point-of-care measurements. The mentioned attributes can be improved by combining lectins with biocompatible 0-3D semiconductors derived from carbon, metal nanoparticles, polymers and their nanocomposites, or employing labeled biomolecules. This systematic review aims to substantiate and update information on the progress made with lectin-based biosensors designed for electroanalysis of clinically relevant carbohydrates and glycoconjugates (glycoproteins, pathogens and cancer biomarkers), highlighting their main detection principles and performance in highly complex biological milieus. Moreover, particular emphasis is given to the main advantages and limitations of the reported devices, as well as the new trends for the current demands. We believe that this review will support and encourage more cutting-edge research involving lectin-based electrochemical biosensors.
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Affiliation(s)
| | - André O Santos
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, 63048-080 Juazeiro do Norte, CE, Brazil
| | - Rafael B Moura
- Centro de Ciências Agrágrias e da Biodiversidade, Universidade Federal do Cariri, 63130-025 Crato, CE, Brazil
| | - Francisco N Pereira-Junior
- Centro de Ciências Agrágrias e da Biodiversidade, Universidade Federal do Cariri, 63130-025 Crato, CE, Brazil
| | - Lucia H Mascaro
- Departamento de Química, Universidade Federal de São Carlos, Rodovia Washington Luis, 13565-905 São Carlos, SP, Brazil
| | - Simone Morais
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4200-072 Porto, Portugal
| | - Thiago M B F Oliveira
- Centro de Ciência e Tecnologia, Universidade Federal do Cariri, 63048-080 Juazeiro do Norte, CE, Brazil.
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6
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Affiliation(s)
- Jeferson A. Dias
- Departamento de Engenharia de Materiais, Laboratório de Formulação e Sínteses Cerâmicas-LAFSCerUniversidade Federal de São Carlos Rod. Washington Luís, km 235 São Carlos/SP Brazil 13565-905
| | - Marcos A. S. Andrade
- Departamento de Química, Centro de Caracterização de Materiais Funcionais-CDMF-LIECUniversidade Federal de São Carlos Rod. Washington Luís, km 235 São Carlos/SP Brazil 13565-905
| | - Hugo L. S. Santos
- Departamento de Química, Centro de Caracterização de Materiais Funcionais-CDMF-LIECUniversidade Federal de São Carlos Rod. Washington Luís, km 235 São Carlos/SP Brazil 13565-905
| | - Márcio R. Morelli
- Departamento de Engenharia de Materiais, Laboratório de Formulação e Sínteses Cerâmicas-LAFSCerUniversidade Federal de São Carlos Rod. Washington Luís, km 235 São Carlos/SP Brazil 13565-905
| | - Lucia H. Mascaro
- Departamento de Química, Centro de Caracterização de Materiais Funcionais-CDMF-LIECUniversidade Federal de São Carlos Rod. Washington Luís, km 235 São Carlos/SP Brazil 13565-905
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7
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Araújo MA, Mascaro LH. Plasma Treatment: a Novel Approach to Improve the Photoelectroactivity of Sb
2
S
3
Thin Films to Water Splitting. ChemElectroChem 2020. [DOI: 10.1002/celc.202000496] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Moisés A. Araújo
- Department of Chemistry Universidade Federal de São Carlos Rodovia Washington Luiz, km 235 13565-905 São Carlos – São Paulo Brazil
| | - Lucia H. Mascaro
- Department of Chemistry Universidade Federal de São Carlos Rodovia Washington Luiz, km 235 13565-905 São Carlos – São Paulo Brazil
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8
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Santos HLS, Corradini PG, Medina M, Dias JA, Mascaro LH. NiMo-NiCu Inexpensive Composite with High Activity for Hydrogen Evolution Reaction. ACS Appl Mater Interfaces 2020; 12:17492-17501. [PMID: 32216323 DOI: 10.1021/acsami.0c00262] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, the effect of copper addition on NiMo coating is evaluated in regard to the hydrogen evolution reaction (HER). NiMo and NiMo-NiCu composites are prepared by a simple coelectrodeposition process. The effect of Cu on deposit characters were tested by varying it in the range of 0.06-0.20 molar ratio. Copper addition promotes the growth of a new crystalline phase: NiCu. Also, the copper addition changed the composite surface. NiMo-NiCu0.12 shows a surface roughness 30 times higher than the NiMo material. NiMo-NiCu materials present higher activity toward HER, larger electroactive area, and higher stability in continuous water electrolysis than NiMo catalysts, as demonstrated by Tafel curves, electrochemical impedance spectroscopy measurements, and polarization tests. The combination of the large electroactive area due to the copper addition, the synergism between Ni-Mo, and the presence of Ni and Mo oxides on the surface results in catalyst with excellent features for HER application.
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Affiliation(s)
- Hugo L S Santos
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Patricia G Corradini
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Marina Medina
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Jeferson A Dias
- Department of Material Engineering, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Lucia H Mascaro
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905, São Carlos, São Paulo, Brazil
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9
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Silva CD, Corradini PG, Mascaro LH, Lemos S, Pereira EC. Using a multiway chemometric tool in the evaluation of methanol electro-oxidation mechanism. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113598] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Andrade MAS, Gromboni MF, Soares LL, Mascaro LH. Cover Feature: Double‐Pulse Electrodeposition of CuGaS
2
Photovoltaic Thin Film (ChemElectroChem 12/2019). ChemElectroChem 2019. [DOI: 10.1002/celc.201900763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Marcos A. S. Andrade
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
| | | | - Leandro L. Soares
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
| | - Lucia H. Mascaro
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
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11
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Bento FR, Corradini PG, Mascaro LH. Inexpensive methodology for obtaining flexible SnO2-single-walled carbon nanotube composites for lithium-ion battery anodes. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04283-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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12
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Affiliation(s)
- Marcos A. S. Andrade
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
| | | | - Leandro L. Soares
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
| | - Lucia H. Mascaro
- Department of ChemistryFederal University of São Carlos Rodovia Washington Luis São Carlos-SP Brazil
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13
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Andrade MAS, Mascaro LH. Photoelectrocatalytic reduction of nitrobenzene on Bi-doped CuGaS 2 films. Chemosphere 2018; 212:79-86. [PMID: 30142568 DOI: 10.1016/j.chemosphere.2018.08.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Nitrobenzene, a toxic nitroaromatic, a feedstock compound to the production of many commercially relevant chemicals were photoelectrocatalytically reduced into aniline on a photoelectrode comprised by a bismuth-doped CuGaS2 nanocrystallyne thin films on molybdenum. The activity of the photoelectrodes were compared to the reaction performed on undoped-CuGaS2 films, and they were carried out under illumination with an applied bias potential at 0.9 V. Aniline was highly selectively obtained with 83% of conversion for reaction times of 100 min when using Bi-doped CuGaS2, representing higher conversion of nitrobenzene and yield to aniline than the undoped photoelectrode. The catalytic performance of the doped films remained stable for a set of 5 consecutive experiments. These results indicate Bi-doped CuGaS2 as a promising material to be applied in the photoelectrocatalytic reduction of nitrobenzene into aniline through the direct pathway mechanism, using solar light illumination.
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Affiliation(s)
- Marcos A S Andrade
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905 São Carlos, SP, Brazil.
| | - Lucia H Mascaro
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, Km 235, CEP 13565-905 São Carlos, SP, Brazil.
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14
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de Araújo MA, Coelho D, Mascaro LH, Pereira EC. The iron oxyhydroxide role in the mediation of charge transfer for water splitting using bismuth vanadate photoanodes. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3774-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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15
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Rong Y, He D, Malpass-Evans R, Carta M, McKeown NB, Gromboni MF, Mascaro LH, Nelson GW, Foord JS, Holdway P, Dale SEC, Bending S, Marken F. High-Utilisation Nanoplatinum Catalyst (Pt@cPIM) Obtained via Vacuum Carbonisation in a Molecularly Rigid Polymer of Intrinsic Microporosity. Electrocatalysis (N Y) 2016. [DOI: 10.1007/s12678-016-0347-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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17
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Ribeiro FWP, de Souza Lucas FW, Mascaro LH, Morais S, da Silva Casciano PN, de Lima-Neto P, Correia AN. Electroanalysis of formetanate hydrochloride by a cobalt phthalocyanine functionalized multiwalled carbon nanotubes modified electrode: characterization and application in fruits. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.086] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Gromboni MF, Araújo MA, Downey E, Marken F, Mascaro LH. Photoanodes on titanium substrates: one-step deposited BiVO4 versus two-step nano-V2O5 films impregnated with Bi3+. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-3034-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Lucas FWDS, Lima ARF, Mascaro LH. Glycerol as additive in copper indium gallium diselenide electrodeposition: morphological, structural and electronic effects. RSC Adv 2015. [DOI: 10.1039/c4ra16668j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The co-electrodeposition of copper, indium, gallium and selenium from a pH 1.5 acid bath onto an FTO substrate in the presence of the additive glycerol (GLR) is studied.
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Affiliation(s)
| | - Alan R. F. Lima
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
| | - Lucia H. Mascaro
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
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20
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Mascaro LH, Pockett A, Mitchels JM, Peter LM, Cameron PJ, Celorrio V, Fermin DJ, Sagu JS, Wijayantha KGU, Kociok-Köhn G, Marken F. One-step preparation of the BiVO4 film photoelectrode. J Solid State Electrochem 2014. [DOI: 10.1007/s10008-014-2495-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Lucas FWDS, Mascaro LH, Fill TP, Rodrigues-Filho E, Franco-Junior E, Homem-de-Mello P, de Lima-Neto P, Correia AN. Diclofenac on boron-doped diamond electrode: from electroanalytical determination to prediction of the electrooxidation mechanism with HPLC-ESI/HRMS and computational simulations. Langmuir 2014; 30:5645-5654. [PMID: 24806390 DOI: 10.1021/la4044123] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using square-wave voltammetry coupled to the boron-doped diamond electrode (BDDE), it was possible to develop an analytical methodology for identification and quantification of diclofenac (DCL) in tablets and synthetic urine. The electroanalytical procedure was validated, with results being statistically equal to those obtained by chromatographic standard method, showing linear range of 4.94 × 10(-7) to 4.43 × 10(-6) mol L(-1), detection limit of 1.15 × 10(-7) mol L(-1), quantification limit of 3.85 × 10(-7) mol L(-1), repeatability of 3.05% (n = 10), and reproducibility of 1.27% (n = 5). The association of electrochemical techniques with UV-vis spectroscopy, computational simulations and HPLC-ESI/HRMS led us to conclude that the electrooxidation of DCL on the BDDE involved two electrons and two protons, where the products are colorful and easily hydrolyzable dimers. Density functional theory calculations allowed to evaluate the stability of dimers A, B, and C, suggesting dimer C was more stable than the other two proposed structures, ca. 4 kcal mol(-1). The comparison of the dimers stabilities with the stabilities of the molecular ions observed in the MS, the compounds that showed retention time (RT) of 15.53, 21.44, and 22.39 min were identified as the dimers B, C, and A, respectively. Corroborating the observed chromatographic profile, dimer B had a dipole moment almost twice higher than that of dimers A and C. As expected, dimer B has really shorter RT than dimers A and C. The majority dimer was the A (71%) and the C (19.8%) should be the minority dimer. However, the minority was the dimer B, which was formed in the proportion of 9.2%. This inversion between the formation proportion of dimer B and dimer C can be explained by preferential conformation of the intermediaries (cation-radicals) on the surface.
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Affiliation(s)
- Francisco Willian de S Lucas
- Departamento de Química Analítica e Físico-Química, Centro de Ciências, Universidade Federal do Ceará , Bloco 940 Campus do Pici, 60440-900, Fortaleza - CE Brazil
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Rios EC, Zimer AM, Pereira EC, Mascaro LH. Analysis of AISI 1020 steel corrosion in seawater by coupling electrochemical noise and optical microscopy. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.059] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gromboni MF, Lucas FWS, Mascaro LH. Optical Properties and Surface Morphology of ZnTe Thin films Prepared by Multiple Potential Steps. J BRAZIL CHEM SOC 2014. [DOI: 10.5935/0103-5053.20140020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Cesarino V, Cesarino I, Moraes FC, Machado SAS, Mascaro LH. Carbon Nanotubes Modified with SnO2Rods for Levofloxacin Detection. J BRAZIL CHEM SOC 2014. [DOI: 10.5935/0103-5053.20140017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abstract
Carbon nanotubes paste electrodes (CNTPE) were prepared using carbon nanotube and mineral oil at different compositions. The carbon nanotubes/mineral oil content in the paste electrode was evaluated using cyclic voltammetry which was 60% (w/w) carbon nanotube. This electrode was characterized by SEM and EIS. The SEM results showed that CNTS structure is not modified by maceration process. From EIS analysis it is possible to observe that the electron transfer reaction is faster in the CNTs presence compared to graphite carbon. CNTPE with 60% (w/w) was used in the determination of rutin in pharmaceutical formulations. Using the differential pulse voltammetric (DPV) procedure, a linear analytical curve was observed in the 1.99x10-7- 9.99x10-6 mol L-1 range with detection limit of 3.39x10-8 mol L-1. The determination of rutin in pharmaceutical formulations showed to be in agreement with the standard spectrophotometric method, AOAC Method, with 95% confidence level and recoveries between 99.2 and 100.5%. The excellent results obtained suggest that the CNTPE 60% (w/w) is suitable for the determination of rutin in pharmaceutical formulations.
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Affiliation(s)
- Aline C. Oliveira
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
| | - Lucia H. Mascaro
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
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Mascaro LH, Berton AN, Micaroni L. Electrochemical Synthesis of Polyaniline/Poly-O-Aminophenol Copolymers in Chloride Medium. International Journal of Electrochemistry 2011. [DOI: 10.4061/2011/292581] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The copolymerization ofo-aminophenol (OAP) and aniline (ANI) on Pt and ITO electrodes was studied using cyclic voltammetry in 0.1 M HCl/0.4 M NaCl solution. The films were characterized by SEM, cyclic voltammetry, and UV-Vis spectroscopy. The properties of the copolymer were compared with PANI and POAP films. The results strongly suggest that the growth of PANI-POAP films does not consist of the simple buildup of layers of homopolymers on the electrode surface as a result of OAP or ANI oxidation products in the monomer mixture, but that a new conducting polymer is formed by copolymerization.
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Affiliation(s)
- Lucia H. Mascaro
- Departamento de Química, Universidade Federal de São Carlos, CP 676, 13565-905 São Carlos, SP, Brazil
| | - Alessandra N. Berton
- Laboratório de Eletroquímica Aplicada e Polímeros, Departamento de Química, Universidade Federal do Paraná, CP 19081, 81531-990 Curitiba, PR, Brazil
| | - Liliana Micaroni
- Laboratório de Eletroquímica Aplicada e Polímeros, Departamento de Química, Universidade Federal do Paraná, CP 19081, 81531-990 Curitiba, PR, Brazil
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Moraes FC, Mascaro LH, Machado SA, Brett CM. Direct electrochemical determination of carbaryl using a multi-walled carbon nanotube/cobalt phthalocyanine modified electrode. Talanta 2009; 79:1406-11. [DOI: 10.1016/j.talanta.2009.06.013] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Revised: 05/30/2009] [Accepted: 06/02/2009] [Indexed: 11/28/2022]
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Taguchi ADS, Bento FR, Mascaro LH. Nucleation and growth of tin-zinc electrodeposits on a polycrystalline platinum electrode in tartaric acid. J BRAZIL CHEM SOC 2008. [DOI: 10.1590/s0103-50532008000400017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Ayoub S, Dias BL, Mascaro LH, Micaroni L, Gazotti WA. Effect of polymerization sequence on the electrochemical properties of polypyrrole / poly(3-methylthiophene) bilayers. e-Polymers 2003. [DOI: 10.1515/epoly.2003.3.1.752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract The electrochemical and photoelectrochemical characteristics of conducting polymer bilayers composed by polypyrrole, PPy, and poly(3-methylthiophene), PMeT, are described. The bilayers were produced by galvanostatic deposition of the polymers using different charge densities. Scanning electron micrographs indicate that the sequence of polymerization affects the surface morphology of the bilayers and, while PMeT polymerizes into the pores of the PPy film, a PPy film is formed over the PMeT film. Cyclic voltammetry of the bilayers shows the peaks corresponding to PPy and PMeT, regardless of the sequence of deposition; however, the potentials of redox processes are slightly shifted. The sequence of polymer deposition also affects the photoelectrochemical properties of the bilayers. The results show that, for a bilayer with PMeT as inner polymer and PPy as outer polymer, an enhanced photocurrent can be obtained by controlling polymer film thickness.
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Affiliation(s)
- Samira Ayoub
- 1Laboratório de Eletroquímica Aplicada e Polímeros, Departamento de Química, Universidade Federal do Paraná, C. Postal 19081, 81531-990, Curitiba, PR, Brazil
| | - Bruna L. Dias
- 2Laboratório de Ciências Químicas, Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, 28013-600, Campos dos Goytacazes, RJ, Brazil
| | - Lucia H. Mascaro
- 3Departamento de Química, Universidade Federal de São Carlos, Via Washington Luiz, Km 235, C. Postal 676, 13565-905, São Carlos, SP, Brazil
| | - Liliana Micaroni
- 1Laboratório de Eletroquímica Aplicada e Polímeros, Departamento de Química, Universidade Federal do Paraná, C. Postal 19081, 81531-990, Curitiba, PR, Brazil
| | - Wilson A. Gazotti
- 4Laboratório de Ciências Químicas, Centro de Ciência e Tecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, 28013-600, Campos dos Goytacazes, RJ, Brazil.
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Sanches LS, Domingues SH, Carubelli A, Mascaro LH. Electrodeposition of Ni-Mo and Fe-Mo alloys from sulfate-citrate acid solutions. J BRAZIL CHEM SOC 2003. [DOI: 10.1590/s0103-50532003000400011] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Bento FR, Mascaro LH. Analysis of the initial stages of electrocrystallization of Fe, Co and Fe-Co alloys in chloride solutions. J BRAZIL CHEM SOC 2002. [DOI: 10.1590/s0103-50532002000400015] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Mascaro LH, Santos MC, Machado SAS, Avaca LA. Voltammetric and rotating ring-disk studies of the influence of anions in the underpotential deposition of zinc on platinum. J BRAZIL CHEM SOC 2002. [DOI: 10.1590/s0103-50532002000400019] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Santos MC, Mascaro LH, Machado SA. Voltammetric and rotating ring-disk studies of underpotential deposition of Ag and Cu on polycrystalline Au electrodes in aqueous H2SO4. Electrochim Acta 1998. [DOI: 10.1016/s0013-4686(97)10171-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mascaro LH, Santos MC, Machado SAS, Avaca LA. Underpotential deposition of silver on polycrystalline platinum studied by cyclic voltammetry and rotating ring-disc techniques. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a703872k] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mascaro LH, Machado SAS, Avaca LA. Determination of lateral interaction parameters for copper monolayers deposited on polycrystalline platinum. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a700607a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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