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Simonenko TL, Bocharova VA, Simonenko NP, Simonenko E, Sevastyanov VG, Kuznetsov NT. Hydrothermal Synthesis of Hierarchical CoMoO4 Nanostructures. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621110176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Keerthana S, Rani BJ, Yuvakkumar R, Ravi G, Saravanakumar B, Pannipara M, Al-Sehemi AG, Velauthapillai D. NiMoO 4 nanorods photocatalytic activity comparison under UV and visible light. ENVIRONMENTAL RESEARCH 2021; 197:111073. [PMID: 33774013 DOI: 10.1016/j.envres.2021.111073] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/04/2021] [Accepted: 03/19/2021] [Indexed: 06/12/2023]
Abstract
Waste water remediation is the ongoing hot research topic that can reduce the water scarcity all over the world. By reducing the pollutants in the waste water drawn from industries and other sources will be more useful for domestic purposes. To reduce the rate of pollutants in water may also help in improving the aquatic environment and decreases other side effects. Efficient and cost effective catalysts were in search for both dye degradation and water remediation treatment applications. NiMoO4 nanorods were prepared by employing co-precipitation method with different stirrer time (2 h, 4 h and 6 h). The formation of NiMoO4 was substantiated employing X-ray diffractometer analysis (XRD). Vibrational and rotational property of the samples was analyzed by FT-IR spectra and Raman spectra. The optical property was further confirmed by UV-vis spectral studies. Morphological analysis studies revealed growth of nanorods with 6 h stirrer time. The photocatalytic behavior of the obtained product was carried out under both UV light (364 nm) and visible light irradiation. The samples subjected to visible light environment showed better efficiency on degrading the methylene blue (MB) dye. The efficiency obtained under UV irradiation were 20%, 31%, 33%, 41% and efficiency obtained in visible light irradiation were 27%, 42%, 46%, 55% with respect to bare methylene blue (MB), MB with NiMoO4 (2 h), MB with NiMoO4 (4 h), MB with NiMoO4 (6 h) catalyst added. NiMoO4 sample with 6 h stirrer time and fine nanorods growth will be the good candidate for future use.
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Affiliation(s)
| | | | - Rathinam Yuvakkumar
- Department of Physics, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India.
| | - Ganesan Ravi
- Department of Physics, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India.
| | | | | | | | - Dhayalan Velauthapillai
- Faculty of Engineering and Science, Western Norway University of Applied Sciences, Bergen, 5063, Norway.
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Silva LAL, Silva AAL, Rios MAS, Brito MP, Araújo AR, Silva DA, Peña-Garcia RR, Silva-Filho EC, Magalhães JL, Matos JME, Osajima JA, Triboni ER. Insights into the Antimicrobial Activity of Hydrated Cobaltmolybdate Doped with Copper. Molecules 2021; 26:molecules26051267. [PMID: 33652788 PMCID: PMC7956662 DOI: 10.3390/molecules26051267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/09/2021] [Accepted: 02/12/2021] [Indexed: 01/04/2023] Open
Abstract
Molybdates are biocidal materials that can be useful in coating surfaces that are susceptible to contamination and the spread of microorganisms. The aim of this work was to investigate the effects of copper doping of hydrated cobalt molybdate, synthesized by the co-precipitation method, on its antibacterial activity and to elucidate the structural and morphological changes caused by the dopant in the material. The synthesized materials were characterized by PXRD, Fourier Transformed Infrared (FTIR), thermogravimetric analysis/differential scanning calorimetry (TG/DSC), and SEM-Energy Dispersive Spectroscopy (SEM-EDS). The antibacterial response of the materials was verified using the Minimum Inhibitory Concentration (MIC) employing the broth microdilution method. The size of the CoMoO4·1.03H2O microparticles gradually increased as the percentage of copper increased, decreasing the energy that is needed to promote the transition from the hydrated to the beta phase and changing the color of material. CoMoO4·1.03H2O obtained better bactericidal performance against the tested strains of Staphylococcus aureus (gram-positive) than Escherichia coli (gram-negative). However, an interesting point was that the use of copper as a doping agent for hydrated cobalt molybdate caused an increase of MIC value in the presence of E. coli and S. aureus strains. The study demonstrates the need for caution in the use of copper as a doping material in biocidal matrices, such as cobalt molybdate.
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Affiliation(s)
- Layane A. L. Silva
- Interdisciplinary Laboratory Advanced Materials, Federal University of Piauí, Teresina 64049-550, Brazil; (L.A.L.S.); (R.R.P.-G.); (E.C.S.-F.); (J.M.E.M.)
| | - André A. L. Silva
- Supramolecular Self-Assembly Laboratory, Federal University of Piauí, Teresina 64049-550, Brazil; (A.A.L.S.); (J.L.M.)
| | - Maria A. S. Rios
- Group of Technological Innovations and Chemical Specialties, Federal University of Ceará, Fortaleza 60455-760, Brazil;
| | - Manoel P. Brito
- Biodiversity and Biotechnology Research Center, Federal University of Delta of Parnaíba, Parnaíba 64202-020, Brazil; (M.P.B.); (A.R.A.); (D.A.S.)
| | - Alyne R. Araújo
- Biodiversity and Biotechnology Research Center, Federal University of Delta of Parnaíba, Parnaíba 64202-020, Brazil; (M.P.B.); (A.R.A.); (D.A.S.)
| | - Durcilene A. Silva
- Biodiversity and Biotechnology Research Center, Federal University of Delta of Parnaíba, Parnaíba 64202-020, Brazil; (M.P.B.); (A.R.A.); (D.A.S.)
| | - Ramón R. Peña-Garcia
- Interdisciplinary Laboratory Advanced Materials, Federal University of Piauí, Teresina 64049-550, Brazil; (L.A.L.S.); (R.R.P.-G.); (E.C.S.-F.); (J.M.E.M.)
- Academic Unit of Cabo de Santo Agostinho, Federal Rural University of Pernambuco, Cabo de Santo Agostinho 52171-900, Brazil
| | - Edson C. Silva-Filho
- Interdisciplinary Laboratory Advanced Materials, Federal University of Piauí, Teresina 64049-550, Brazil; (L.A.L.S.); (R.R.P.-G.); (E.C.S.-F.); (J.M.E.M.)
| | - Janildo L. Magalhães
- Supramolecular Self-Assembly Laboratory, Federal University of Piauí, Teresina 64049-550, Brazil; (A.A.L.S.); (J.L.M.)
| | - José M. E. Matos
- Interdisciplinary Laboratory Advanced Materials, Federal University of Piauí, Teresina 64049-550, Brazil; (L.A.L.S.); (R.R.P.-G.); (E.C.S.-F.); (J.M.E.M.)
| | - Josy A. Osajima
- Interdisciplinary Laboratory Advanced Materials, Federal University of Piauí, Teresina 64049-550, Brazil; (L.A.L.S.); (R.R.P.-G.); (E.C.S.-F.); (J.M.E.M.)
- Correspondence: (J.A.O.); (E.R.T.); Tel.: +55-(89)-3562-2247 (J.A.O.); +55-(12)-3159-5328 (E.R.T.)
| | - Eduardo R. Triboni
- Nanotechnology and Process Engineering-NEP, University of São Paulo, Lorena 12602-810, Brazil
- Correspondence: (J.A.O.); (E.R.T.); Tel.: +55-(89)-3562-2247 (J.A.O.); +55-(12)-3159-5328 (E.R.T.)
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Harichandran G, Radha S, Yesuraj J, Muthuraaman B. Facile Synthesis and Characterization of Cu
3
(MoO
4
)
2
(OH)
2
Nanorods for High Performance Supercapacitor Electrode Application. ChemistrySelect 2020. [DOI: 10.1002/slct.202002610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Gurusamy Harichandran
- Department of Polymer Science University of Madras, Guindy Campus Chennai 600 025 India
| | - Sivasubramanian Radha
- Department of Polymer Science University of Madras, Guindy Campus Chennai 600 025 India
| | - Johnbosco Yesuraj
- Department of Energy University of Madras, Guindy Campus Chennai 600 025 India
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The relationship between crystal structures and thermochromism in CoMoO4. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01294-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Martins GM, Moreira RL, Dias A. A soft chemistry approach to preparing (de)sodiated transition-metal hydroxy molybdates. CrystEngComm 2020. [DOI: 10.1039/c9ce01554j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymorphic transformations were investigated for (de)sodiated Ni and Zn hydroxy molybdates prepared under mild hydrothermal conditions.
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Affiliation(s)
- Guilherme M. Martins
- Departamento de Química
- ICEx
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Roberto L. Moreira
- Departamento de Física
- ICEx
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | - Anderson Dias
- Departamento de Química
- ICEx
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
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Das D. Structural Diversity in Heterobimetallic Complexes of Alkaline Earth Metals and Molybdenum, and Selective Dye Adsorption Properties of Mixed Metal Oxides Synthesized from the Heterobimetallic Complexes. ChemistrySelect 2019. [DOI: 10.1002/slct.201803514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dhiraj Das
- Department of Chemical Sciences; Indian Institute of Science Education and Research, Mohali,Knowledge, city, Sector-81, S.A.S. Nagar; Manauli PO 140306 India
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Toulemonde O, Devoti A, Rosa P, Guionneau P, Duttine M, Wattiaux A, Lebraud E, Penin N, Decourt R, Fargues A, Buffière S, Demourgues A, Gaudon M. Probing Co- and Fe-doped LaMO 3 (M = Ga, Al) perovskites as thermal sensors. Dalton Trans 2018; 47:382-393. [PMID: 29218338 DOI: 10.1039/c7dt03647g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a Co-doped or Fe-doped La(Ga,Al)O3 perovskite via the Pechini process aimed to achieve a color change induced by temperature and associated with spin crossover (SCO). In Fe-doped samples, iron was shown to be in the high-spin state, whereas SCO from the low-spin to the high-spin configuration was detected in Co-doped compounds when the temperature increased. Fe-doped compounds clearly adopted the high-spin configuration even down to 4 K on the basis of Mössbauer spectroscopic analysis. The original SCO phenomenon in the Co-doped compounds LaGa1-xCoxO3 (0 < x < 0.1) was evidenced and discussed on the basis of in situ X-ray diffraction analysis and UV-vis spectroscopy. This SCO is progressive as a function of temperature and occurs over a broad range of temperatures between roughly 300 °C and 600 °C. The determination of a crystal field strength of about 2 eV and a Racah parameter B of about 500 cm-1 for Co3+ (3d6) ions show that these values allow the occurrence of SCO. Hence, this study shows the possibility of using LaGa1-xCoxO3 compounds as thermal sensors at low Co contents (x = 0.02). The competition between steric and electronic effects in LaGaO3 in which Co3+ is stabilized in the LS state shows that electronic effects with the creation of M-O covalent bonds are predominant and contribute to the stabilization of a high crystal field around Co3+ (LS) although its ionic radius is smaller in comparison with that of Ga3+.
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Silver-, calcium-, and copper molybdate compounds: Preparation, antibacterial activity, and mechanisms. Biointerphases 2017; 12:05G607. [PMID: 29113436 DOI: 10.1116/1.4996434] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Developing novel compounds with antimicrobial properties can be an effective approach to decreasing the number of healthcare-associated infections, particularly in the context of medical devices and touch surfaces. A variety of molybdate powders (Ag2MoO4, CaMoO4, CuMoO4 and Cu3Mo2O9) were synthesized and characterized, and Escherichia coli was used as a model gram-negative bacterium to demonstrate their antimicrobial properties. Optical density measurements, bacterial colony growth, and stained gel images for protein expression clearly showed that silver- and copper molybdates inhibit bacterial growth, whereas CaMoO4 exhibited no bactericidal effect. All tests were performed in both daylight and darkness to assess the possible contribution of a photocatalytic effect on the activity observed. The main mechanism responsible for the antibacterial effect observed for Ag2MoO4 is related to Ag+ release in combination with medium acidification, whereas for compounds containing copper, leaching of Cu2+ ions is proposed. All these effects are known to cause damage at the cellular level. A photocatalytic contribution to the antibacterial activity was not clearly observable. Based on the pH and solubility measurements performed for powders in contact with various media (ultrapure water and bacterial growth medium), silver molybdate (Ag2MoO4) was identified as the best antibacterial candidate. This compound has great potential for further use in hybrid powder-polymer/varnish systems for touch surfaces in healthcare settings.
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Das D, Bhattacharjee M. Synthesis and structure of heterobimetallic Mo–M [M = Na, Co, Ni and Zn] compounds and synthesis of nanostructured mixed metal oxides MMoO4 and MoO3 [M = Co, Ni and Zn] from the heterobimetallic complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Blanco-Gutierrez V, Cornu L, Demourgues A, Gaudon M. CoMoO4/CuMo0.9W0.1O4 mixture as an efficient piezochromic sensor to detect temperature/pressure shock parameters. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7112-7117. [PMID: 25768036 DOI: 10.1021/am508652h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A mixture of two piezochromic compounds can be used as a universal shock detector, i.e., to determine the shock pressure without knowing a priori the temperature at which the shock occurred. For this purpose, both piezochromic compounds must exhibit different temperature influences in their transition-pressure values. This demonstration uses two piezochromic compounds (CoMoO4 and CuMoO4-type oxides) that exhibit a first-order phase transition between their two allotropic forms associated with a drastic color change. The colorimetric coordinates of the mixture indicate the pressure and temperature of a shock.
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Affiliation(s)
- Veronica Blanco-Gutierrez
- Institut de Chimie de la Matière Condensée de Bordeaux, 87 Avenue du Dr. Schweitzer, 33608 PESSAC Cedex, France
| | - Lucile Cornu
- Institut de Chimie de la Matière Condensée de Bordeaux, 87 Avenue du Dr. Schweitzer, 33608 PESSAC Cedex, France
| | - Alain Demourgues
- Institut de Chimie de la Matière Condensée de Bordeaux, 87 Avenue du Dr. Schweitzer, 33608 PESSAC Cedex, France
| | - Manuel Gaudon
- Institut de Chimie de la Matière Condensée de Bordeaux, 87 Avenue du Dr. Schweitzer, 33608 PESSAC Cedex, France
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Blanco-Gutierrez V, Demourgues A, Toulemonde O, Wattiaux A, Nguyen O, Gaudon M. Understanding the relationships between structural features and optical/magnetic properties when designing Fe(1-x)Mg(x)MoO4 as piezochromic compounds. Inorg Chem 2015; 54:2176-84. [PMID: 25664488 DOI: 10.1021/ic5025845] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fe1-xMgxMoO4 compounds with x = 0, 0.25, 0.5, 0.75, and 1.0 were obtained after annealing under inert gas at T = 700 °C. All of the compounds exhibit a pressure-induced and/or temperature-induced phase transition between the two polymorphs adopted by AMoO4 compounds (A = Mn, Fe, Co, and Ni). For the FeMoO4 compound, for both the α and the β allotropic forms, the structural features have been correlated to the magnetic properties, the Mössbauer signals, and the optical absorption properties to gain a better understanding of the phenomena at the origin of the piezo(thermo)chromic behavior. The different contributions of the Mössbauer signals were attributed to the different Fe(2+) ions or Fe(3+) ions from the structural data (Wyckoff positions, bond distances and angles) and were quantified. Furthermore, the low Fe(3+) concentration (9 and 4 mol %, respectively, in the α and the β allotropic forms) was also quantified based on the magnetic susceptibility measurements. The net increase in the Fe(3+) quantity in the α-form in comparison to the β-form, which is associated with the occurrence of Fe-Mo charge transfer, is at the origin of the important divergence of coloration of the two forms. To design new piezo(thermo)chromic oxides and to control the pressure (temperature) of this first-order phase transition, FeMoO4-MgMoO4 solid solutions were synthesized. The optical contrast between the two allotropic forms was increased due to magnesium incorporation, and the phase transition (β → α) pressure increased steadily with the Mg content. A new generation of nontoxic and chemically stable piezochromic compounds that are sensible to various pressures was proposed.
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Affiliation(s)
- Veronica Blanco-Gutierrez
- Université de Bordeaux, CNRS, ICMCB , 87 Avenue du Dr. Albert Schweitzer, 33608 F-Pessac Cedex, France
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Ramkumar R, Minakshi M. Fabrication of ultrathin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device. Dalton Trans 2015; 44:6158-68. [DOI: 10.1039/c5dt00622h] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ultrathin nanosheet-assembled cobalt molybdate (CoMoO4) with a mesoporous morphology was synthesized by a urea-assisted solution combustion route at a temperature of 400 °C.
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Affiliation(s)
- Ramya Ramkumar
- Energy
- School of Engineering and Information Technology
- Murdoch University
- WA 6150
- Australia
| | - Manickam Minakshi
- Energy
- School of Engineering and Information Technology
- Murdoch University
- WA 6150
- Australia
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