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Journal articles on the topic 'Silver molybdates'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Gamsjäger, Heinz, and Masao Morishita. "Thermodynamic properties of molybdate ion: reaction cycles and experiments." Pure and Applied Chemistry 87, no. 5 (May 1, 2015): 461–76. http://dx.doi.org/10.1515/pac-2014-1105.

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AbstractStandard molar quantities of molybdate ion entropy, $S_{\rm{m}}^0,$ enthalpy of formation, ${\Delta _{\rm{f}}}H_m^{\rm{o}},$ and Gibbs energy of formation, ${\Delta _{\rm{f}}}G_{\rm{m}}^{\rm{o}},$ are key data for the thermodynamic properties of molybdenum compounds and complexes, which are at present investigated by an OECD NEA review project. The most reliable method to determine ${\Delta _{\rm{f}}}H_{\rm{m}}^{\rm{o}}$ of molybdate ion and alkali molybdates directly consists in measuring calorimetrically the enthalpy of dissolution of crystallized molybdenum trioxide and anhydrous alkali molybdates in corresponding aqueous alkali metal hydroxide solutions. Solubility equilibria of sparingly soluble alkaline earth molybdates and silver molybdate lead to trustworthy data for ${\Delta _{\rm{f}}}G_{\rm{m}}^{\rm{o}}$ of molybdate ion. Thereby the Gibbs energies of the metal molybdates and the corresponding metal ions are combined with the Gibbs energies of dissolution. As reliable values are available for ${\Delta _{\rm{f}}}G_{\rm{m}}^{\rm{o}}$ of the relevant metal ions the problem reduces to select the best values of solubility constants and ${\Delta _{\rm{f}}}G_{\rm{m}}^{\rm{o}}$ of alkaline earth molybdates and silver molybdate. There are two independent possibilities to achieve the latter task. (1) ${\Delta _{\rm{f}}}H_{\rm{m}}^{\rm{o}}$ for alkaline earth molybdates and silver molybdate have been determined by solution calorimetry. Entropy data of molybdenum have been compiled and evaluated recently. CODATA key values are available for $S_{\rm{m}}^{\rm{o}}$ of the other elements involved. Whereas $S_{\rm{m}}^{\rm{o}}({\rm{CaMo}}{{\rm{O}}_4},{\rm{ cr}})$ is well known since decades, low-temperature heat capacity measurements had to be performed recently, but now reliable values for $S_{\rm{m}}^{\rm{o}}$ of Ag2MoO4(cr), BaMoO4(cr) and SrMoO4(cr) are available. (2) ${\Delta _{\rm{f}}}H_{\rm{m}}^{\rm{o}}({\rm{BaMo}}{{\rm{O}}_4},{\rm{ cr}}),$ for example, can be obtained from high temperature equilibria also, but the result is less accurate than that of the first method. Once Gibbs energy of formation, ${\Delta _{\rm{f}}}G_{\rm{m}}^{\rm{o}},$ and enthalpy of formation, ${\Delta _{\rm{f}}}H_{\rm{m}}^{\rm{o}},$ of molybdate ion are known its standard entropy, $S_{\rm{m}}^{\rm{o}},$ can be calculated.

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2

Spiridonova, Tatiana S., Sergey F. Solodovnikov, Yulia M. Kadyrova, Zoya A. Solodovnikova, Alexandra A. Savina, and Elena G. Khaikina. "Double molybdates of silver and monovalent metals." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 23, no. 3 (August 17, 2021): 421–31. http://dx.doi.org/10.17308/kcmf.2021.23/3527.

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The Ag2MoO4–Cs2MoO4 system was studied by powder X-ray diffraction, the formation of a new double molybdate CsAg3(MoO4)2 was established, its single crystals were obtained, and its structure was determined. CsAg3(MoO4)2 (sp. gr. P3¯, Z = 1, a = 5.9718(5), c = 7.6451(3) Å, R = 0.0149) was found to have the structure type of Ag2BaMn(VO4)2. The structure is based on glaserite-like layers of alternating MoO4 tetrahedra and Ag1O6 octahedra linked by oxygen vertices, which are connected into a whole 3D framework by Ag2O4 tetrahedra. An unusual feature of the Ag2 atom environment is its location almost in the centre of an oxygen face of the Ag2O4 tetrahedron. Caesium atoms are in cuboctahedral coordination (CN = 12).We determined the structures of the double molybdate of rubidium and silver obtained by us previously and a crystal from the solid solution based on the hexagonal modification of Tl2MoO4, which both are isostructural to glaserite K3Na(SO4)2 (sp. gr. P3¯m1). According to X-ray structural analysis data, both crystals have nonstoichiometric compositions Rb2.81Ag1.19(MoO4)2 (a = 6.1541(2), c = 7.9267(5) Å, R = 0.0263) and Tl3.14Ag0.86(MoO4)2 (a = 6.0977(3), c = 7.8600(7) Å, R = 0.0174). In the case of the rubidium compound, the splitting of the Rb/Ag position was revealed for the first time am ong molybdates. Both structures are based on layers of alternating MoO4 tetrahedra and AgO6 or (Ag, Tl)O6 octahedra linked by oxygen vertices. The coordination numbers of rubidium and thallium are 12 and 10

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3

Combs, Derrick, Brendan Godsel, Julie Pohlman-Zordan, Allen Huff, Jackson King, Robert Richter, and Paul F. Smith. "Reduction of silver ions in molybdates: elucidation of framework acidity as the factor controlling charge balance mechanisms in aqueous zinc-ion electrolyte." RSC Advances 11, no. 62 (2021): 39523–33. http://dx.doi.org/10.1039/d1ra07765a.

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4

Il’ina, A. A., I. A. Stenina, G. V. Lysanova, and A. B. Yaroslavtsev. "Synthesis and ionic conductivity of silver magnesium zirconium molybdates." Inorganic Materials 45, no. 4 (April 2009): 436–39. http://dx.doi.org/10.1134/s0020168509040207.

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5

Shi, Fanian, Jian Meng, and Yufang Ren. "Structure and Luminescent Properties of Three New Silver Lanthanide Molybdates." Journal of Solid State Chemistry 121, no. 1 (January 1996): 236–39. http://dx.doi.org/10.1006/jssc.1996.0033.

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6

Fenker, Martin, Martin Balzer, Sabine Kellner, Tomas Polcar, Andreas Richter, Frank Schmidl, and Tomas Vitu. "Formation of Solid Lubricants during High Temperature Tribology of Silver-Doped Molybdenum Nitride Coatings Deposited by dcMS and HIPIMS." Coatings 11, no. 11 (November 19, 2021): 1415. http://dx.doi.org/10.3390/coatings11111415.

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The coating system MoN-Ag is an interesting candidate for industrial applications as a low friction coating at elevated temperatures, due to the formation of lubricous molybdenum oxides and silver molybdates. Film deposition was performed by high-power impulse magnetron sputtering and direct current magnetron sputtering. To facilitate a future transfer to industry Mo-Ag composite targets have been sputtered in Ar/N2 atmosphere. The chemical composition of the deposited MoN-Ag films has been investigated by wavelength dispersive X-ray spectroscopy. Morphology and crystallographic phases of the films were studied by scanning electron microscopy and X-ray diffraction. To obtain film hardness in relation to Ag content and bias voltage, the instrumented indentation test was applied. Pin-on-disc tribological tests have been performed at room temperature and at high temperature (HT, 450 °C). Samples from HT tests have been analyzed by Raman measurements to identify possible molybdenum oxide and/or silver molybdate phases. At low Ag contents (≤7 at.%), coatings with a hardness of 18–31 GPa could be deposited. Friction coefficients at HT decreased with increasing Ag content. After these tests, Raman measurements revealed the MoO3 phase on all samples and the Ag2Mo4O13 phase for the highest Ag contents (~23–26 at.%).

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7

Lupitskaya, Yu A., D. A. Kalganov, L. Yu Kovalenko, and F. A. Yaroshenko. "Phase Formation, Crystal Structure and Ion Conductivity of Silver Antimonate-Molybdates." Journal of Nanoscience and Nanotechnology 20, no. 7 (July 1, 2020): 4597–600. http://dx.doi.org/10.1166/jnn.2020.17872.

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The features of the formation of compounds based on silver antimonate obtained in the AgNO3–Sb2O3–MoO3 system by the solid-phase reaction were investigated. For a synthesis temperature of 1023 K, a homogeneous concentration region of the Ag2−xSb2−xMoxO6 solid solution with a structure of the defective pyrochlore type in the range of 0.0 ≤ x ≤ 2.0 was detected. The Rietveld method, within the constraints of the Fd-3m space group, was used to refinement of X-ray diffraction data, specify the structural parameters of powders, and the correlation of structural disorder with their electrically conductive properties. Relative density and average particle size for ceramic samples sintered at 1223 K were determined using scanning electron microscopy.

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8

Kotova, I. Yu, and V. P. Korsun. "Phase formation in the system involving silver, magnesium, and indium molybdates." Russian Journal of Inorganic Chemistry 55, no. 12 (December 2010): 1965–69. http://dx.doi.org/10.1134/s0036023610120247.

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9

Kotova, I. Yu, A. A. Savina, A. I. Vandysheva, D. A. Belov, and S. Yu Stefanovich. "Synthesis, crystal structure and electrophysical properties of triple molybdates containing silver, gallium and divalent metals." Chimica Techno Acta 5, no. 3 (2018): 132–43. http://dx.doi.org/10.15826/chimtech.2018.5.3.02.

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10

Aditya, Teresa, Jayasmita Jana, Ramkrishna Sahoo, Anindita Roy, Anjali Pal, and Tarasankar Pal. "Silver Molybdates with Intriguing Morphology and as a Peroxidase Mimic with High Sulfide Sensing Capacity." Crystal Growth & Design 17, no. 1 (December 14, 2016): 295–307. http://dx.doi.org/10.1021/acs.cgd.6b01532.

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11

Zakaryan, Marieta, Khachik Nazaretyan, Sofiya Aydinyan, and Suren Kharatyan. "Kinetic Highlights of the Reduction of Silver Tungstate by Mg + C Combined Reducer." Metals 12, no. 6 (June 10, 2022): 1000. http://dx.doi.org/10.3390/met12061000.

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The programmed reduction of tungstates and molybdates may yield the production of an intimate mixture of metals, pseudo-alloys or composite powders. As an extension of the study of obtaining powders of tungsten-copper, molybdenum-copper and tungsten-nickel from their respective salts, in the present study the reduction of silver tungstate was performed. Considering the extreme conditions for the synthesis of W-Ag alloys in the combustion wave and the limited toolkit for the study of the associated reduction mechanism, the interaction in the Ag2WO4-Mg-C system was modeled at high heating rates closer to the heating rates of reagents in the combustion wave, namely by the high-speed temperature scanner (HSTS). For the effective study of the interaction mechanism and calculation of the kinetic parameters of the individual stages, the heating rate of the reagents was changed in a wide range (from 100 to 1200 °C min−1). The interaction scheme and the sequence of the reactions along with their starting temperatures were deduced; the nature of intermediates formed during the reduction process and the microstructure evolution were monitored.

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12

Zhang, Qingting, Andreas Goldbach, Na Ta, and Wenjie Shen. "Selective oxidation of propylene to acrolein over silver-promoted hexagonal molybdates and derivative Ag/Ag2Mo4O13/α-MoO3 composites." Applied Catalysis A: General 623 (August 2021): 118275. http://dx.doi.org/10.1016/j.apcata.2021.118275.

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13

Ferreira, E. A. C., N. F. Andrade Neto, M. R. D. Bomio, and F. V. Motta. "Influence of solution pH on forming silver molybdates obtained by sonochemical method and its application for methylene blue degradation." Ceramics International 45, no. 9 (June 2019): 11448–56. http://dx.doi.org/10.1016/j.ceramint.2019.03.012.

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14

Lin, Jintai, Qianming Wang, Yuhui Zheng, and Yanfen Zhang. "Supersonic microwave co-assistance (SMC) efficient synthesis of red luminescent Eu3+ activated silver molybdates and their phase-dependent evolution processes." CrystEngComm 15, no. 28 (2013): 5668. http://dx.doi.org/10.1039/c3ce40553b.

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15

Mispa, K. Jacinth, P. Subramaniam, and R. Murugesan. "Studies on Polyaniline/Silver Molybdate Nanocomposites." International Journal of Nanoscience 13, no. 01 (February 2014): 1450002. http://dx.doi.org/10.1142/s0219581x14500021.

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Silver molybdate nanoparticles were successfully prepared by the hydrothermal process. Polyaniline–silver molybdate nanocomposites were prepared by in situ chemical oxidative polymerization technique. Silver molybdate nanoparticles and the polymer samples were characterized by conductivity studies, Fourier transform infrared spectra (FT-IR), UV-visible spectra, photoluminescence spectra, X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The electrical conductivity of PANI- Cl - increases when doped with silver molybdate nanoparticles and follows the percolation threshold.

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16

Ferreira, E. A. C., N. F. Andrade Neto, M. R. D. Bomio, and F. V. Motta. "Corrigendum to ‘Influence of solution pH on forming silver molybdates obtained by sonochemical method and its application for methylene blue degradation’ [Ceramics International 45 (2019) 11448–11456]." Ceramics International 45, no. 14 (October 2019): 18147–49. http://dx.doi.org/10.1016/j.ceramint.2019.05.232.

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17

Il’ina, A. A., I. A. Stenina, G. V. Lysanova, A. G. Veresov, and A. B. Yaroslavtsev. "Silver magnesium molybdate and silver cobalt molybdate: Synthesis and ionic conductivity." Russian Journal of Inorganic Chemistry 51, no. 6 (June 2006): 890–94. http://dx.doi.org/10.1134/s0036023606060076.

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18

Kotova, Irina Yu, Sergey F. Solodovnikov, Zoya A. Solodovnikova, Dmitry A. Belov, Sergey Yu Stefanovich, Aleksandra A. Savina, and Elena G. Khaikina. "New series of triple molybdates AgA3R(MoO4)5 (A=Mg, R=Cr, Fe; A=Mn, R=Al, Cr, Fe, Sc, In) with framework structures and mobile silver ion sublattices." Journal of Solid State Chemistry 238 (June 2016): 121–28. http://dx.doi.org/10.1016/j.jssc.2016.03.003.

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19

Vishnevetskii, Dmitry V., Dmitry V. Averkin, Alexey A. Efimov, Anna A. Lizunova, Alexandra I. Ivanova, Pavel M. Pakhomov, and E. Ruehl. "Ag/α-Ag₂MoO₄/h-MoO₃ nanoparticle based microspheres: synthesis and photosensitive properties." Soft Matter 17, no. 46 (2021): 10416–20. http://dx.doi.org/10.1039/d1sm01315g.

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20

De Santana, Yuri V. B., José Ernane Cardoso Gomes, Leandro Matos, Guilherme Henrique Cruvinel, André Perrin, Christiane Perrin, Juan Andrès, José A. Varela, and Elson Longo. "Silver Molybdate and Silver Tungstate Nanocomposites with Enhanced Photoluminescence." Nanomaterials and Nanotechnology 4 (January 2014): 22. http://dx.doi.org/10.5772/58923.

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21

Morishita, Masao, Hiroki Houshiyama, Yoshiki Kinoshita, Ai Nozaki, and Hiroaki Yamamoto. "Third Law Entropy of Silver Molybdate." MATERIALS TRANSACTIONS 58, no. 6 (2017): 868–72. http://dx.doi.org/10.2320/matertrans.m2017005.

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22

Rahman, M. F., M. Rusnam, N. Gusmanizar, N. A. Masdor, C. H. Lee, M. S. Shukor, M. A. H. Roslan, and M. Y. Shukor. "Molybdate-reducing and SDS-degrading Enterobacter sp. Strain Neni-13." Nova Biotechnologica et Chimica 15, no. 2 (December 1, 2016): 166–81. http://dx.doi.org/10.1515/nbec-2016-0017.

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AbstractToxicants removal through microorganism’s action is intensely being sought due to economic reasons. The aim of this paper is to isolate a bacterium that is able to reduce molybdenum blue and at the same time can grow on the detergent Sodium Dodecyl Sulfate (SDS). Biochemical analysis resulted in a tentative identification of the bacterium as Enterobacter sp. strain Neni-13. Growth on SDS showed a 100 % removal at 800 mg/L SDS within 12 days. The removal of SDS from media was confirmed through Methylene Blue Active Substances Assay. Molybdenum reduction using sodium molybdate as a substrate was characterized using a microplate assay. The optimum pH and temperature for molybdenum reduction was between 6.0 and 6.5, and at 37 °C, respectively. Glucose was the best electron donor for molybdate reduction. Phosphate and molybdate concentrations of between 2.5 and 5.0 mM and at 15 mM, were optimal for molybdate reduction, respectively. Molybdate reduction was inhibited by the heavy metals mercury, silver, copper and chromium at 2 ppm. The ability of this bacterium to detoxify molybdate and degrade the SDS makes this bacterium an important tool for bioremediation of toxicants in soil.

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23

Chupina, Anastasia V., Vladimir Shayapov, Alexander S. Novikov, Victoria V. Volchek, Enrico Benassi, Pavel A. Abramov, and Maxim N. Sokolov. "[{AgL}2Mo8O26]n– complexes: a combined experimental and theoretical study." Dalton Transactions 49, no. 5 (2020): 1522–30. http://dx.doi.org/10.1039/c9dt04043a.

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Two sets of silver–molybdate complexes with L = XR₃ (X = P, As, Sb; R₃ = Ph₃, Ph₂Py) and functionalized pyridine-based ligands have been studied with different techniques.

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24

Mohamad, Othman, Hafeez Muhammad Yakasai, Kabiru Ibrahim Karamba, Mohd Izuan Effendi Halmi, Mohd Fadhil Rahman, and Mohd Yunus Shukor. "Reduction of Molybdenum by Pseudomonas aeruginosa strain KIK-11 Isolated from a Metal-contaminated Soil with Ability to Grow on Diesel and Sodium Dodecyl Sulphate." Journal of Environmental Microbiology and Toxicology 5, no. 2 (December 31, 2017): 19–26. http://dx.doi.org/10.54987/jemat.v5i2.411.

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Recently, molybdenum is considered as an emerging pollutant for its extreme toxicity to spermatogenesis in some organisms. Bacterial molybdate reduction to colloidal molybdenum blue (Mo-blue) forms the basis for its bioremediation. Molybdenum-reducing Pseudomonas aeruginosa strain KIK-11 was screened for its potential to degrade hydrocarbons and detergents. Optimal molybdate reduction to Mo-blue in this strain was supported by pH between 5.8 and 6.0, temperatures between 25 and 34 oC, molybdate concentration between 30 and 40 mM and a critical phosphate concentration of between 5.0 and 7.5 mM. The isolate was able to survive and grow on SDS and diesel. However, these compounds did not support Mo-blue production. The best electron donor source facilitating molybdate reduction is glucose, followed by galactose, fructose and citrate respectively. The process was inhibited by heavy metals such as copper (II), mercury (II) and silver (I). The bacterium was able to grow and detoxify multiple toxicants, a novel feat that is important in bioremediation.

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25

Abo-Shakeer, Abo-Shakeer, S. A. Ahmad, M. Y. Shukor, N. A. Shamaan, and M. A. Syed. "Isolation and characterization of a molybdenum-reducing Bacillus pumilus strain lbna." Journal of Environmental Microbiology and Toxicology 1, no. 1 (December 26, 2013): 9–14. http://dx.doi.org/10.54987/jemat.v1i1.18.

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The reduction of heavy metals by microorganisms has an important role in biological system and also in the cycling of metals in the environment to remove its toxic effects in soil and wastewater. A molybdenum-reducing bacterium was isolated from soil obtained from Seri Kembangan, Selangor. This isolate is Gram positive bacteria and was identified as bacillus pumilus strain based on 16s rRNA gene sequencing. Molybdenum reduction is optimally supported by glucose at 1.0% (w/v). The optimum phosphate and molybdate concentrations for molybdate reduction in Bacillus pumilusstrain Lbnawas between 2.5 and 5 mM phosphate and 40 mMmolybdate. Molybdate reduction is optimum at 37 ÂºC. The metal ions arsenic, lead, zinc, silver, cadmium, chromium, mercury and copper caused 33.7, 36.0, 51.2, 60.5, 63.9, 91.3, 92.3 and 98.0% inhibition to molybdenum reduction.

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26

Arora, A. K., R. Nithya, Sunasira Misra, and Takehiko Yagi. "Behavior of silver molybdate at high-pressure." Journal of Solid State Chemistry 196 (December 2012): 391–97. http://dx.doi.org/10.1016/j.jssc.2012.07.003.

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27

Juszczyk, B., J. Kulasa, A. Gubernat, W. Malec, L. Ciura, M. Malara, Ł. Wierzbicki, and J. Gołębiewska-Kurzawska. "Influence of Chemical Composition and Production Process Parameters on the Structure and Properties of Silver Based Composites With ZnO / Ocena Wpływu Składu Chemicznego Oraz Parametrów Wytwarzania Na Strukturę I Właściwości Kompozytów Na Osnowie Srebra Z Udziałem ZnO." Archives of Metallurgy and Materials 57, no. 4 (December 1, 2012): 1063–73. http://dx.doi.org/10.2478/v10172-012-0118-0.

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The paper shows results of the study into influence of chemical composition and consolidation process conditions on changes of physical and electrical properties of silver-based composites used in production of electric contacts. The investigations addressed influence of content of zinc oxide (ZnO) and modifying additions in a form of silver tungstate (Ag2WO4) and silver molybdate (Ag2MoO4) on changes in density, porosity and electrical conductivity. Density of the produced compacts was established by geometric method. The results of density measurements were used in determination of total porosity of sinters. Also arc erosion was examined to determine applicability of the produced composites for production of electric contacts. The erosion was measured as mass loss of individual materials after specific number of connections. The studies were conducted at current intensity of 10 A and voltage of 500V. The scope of the studies covered also evaluation of kinetics of sintering of the examined composites and determination of the mechanisms of mass transport in the process. Studies into kinetics of sintering were conducted in the air atmosphere at constant temperature of 900°C. Production of the examined composite materials consisted of mechanical synthesis of powders of silver, zinc oxide and silver tungstate and molybdate, and then their consolidation by two-sided pressing and subsequent sintering. In cold pressing various pressures were applied 200, 300 and 400 MPa. Sintering was performed with a partial participation of liquid phase in temperature of 900°C. Also additional two-sided pressing was applied under pressure of 500 MPa and stress-relieving recrystallization annealing was performed as the final operation.

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28

Mandanici, A., A. Raimondo, M. Cutroni, M. A. Ramos, J. G. Rodrigo, S. Vieira, C. Armellini, and F. Rocca. "Thermal expansion of silver iodide-silver molybdate glasses at low temperatures." Journal of Chemical Physics 130, no. 20 (May 28, 2009): 204508. http://dx.doi.org/10.1063/1.3139450.

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29

Arof, A. K. "Factors affecting the internal resistance of silver/silver molybdate/iodine cells." Journal of Power Sources 45, no. 2 (June 1993): 255–61. http://dx.doi.org/10.1016/0378-7753(93)87016-v.

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30

Ahmad, S. A., M. Y. Shukor, N. A. Shamaan, W. P. Mac Cormack, and M. A. Syed. "Molybdate Reduction to Molybdenum Blue by an Antarctic Bacterium." BioMed Research International 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/871941.

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A molybdenum-reducing bacterium from Antarctica has been isolated. The bacterium converts sodium molybdate or Mo6+to molybdenum blue (Mo-blue). Electron donors such as glucose, sucrose, fructose, and lactose supported molybdate reduction. Ammonium sulphate was the best nitrogen source for molybdate reduction. Optimal conditions for molybdate reduction were between 30 and 50 mM molybdate, between 15 and 20°C, and initial pH between 6.5 and 7.5. The Mo-blue produced had a unique absorption spectrum with a peak maximum at 865 nm and a shoulder at 710 nm. Respiratory inhibitors such as antimycin A, sodium azide, potassium cyanide, and rotenone failed to inhibit the reducing activity. The Mo-reducing enzyme was partially purified using ion exchange and gel filtration chromatography. The partially purified enzyme showed optimal pH and temperature for activity at 6.0 and 20°C, respectively. Metal ions such as cadmium, chromium, copper, silver, lead, and mercury caused more than 95% inhibition of the molybdenum-reducing activity at 0.1 mM. The isolate was tentatively identified asPseudomonassp. strain DRY1 based on partial 16s rDNA molecular phylogenetic assessment and the Biolog microbial identification system. The characteristics of this strain would make it very useful in bioremediation works in the polar and temperate countries.

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31

Lim, Sharon Xiaodai, Zheng Zhang, Gavin Kok Wai Koon, and Chorng-Haur Sow. "Unlocking the potential of carbon incorporated silver-silver molybdate nanowire with light." Applied Materials Today 20 (September 2020): 100670. http://dx.doi.org/10.1016/j.apmt.2020.100670.

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32

Yang, Xianglong, Ying Wang, Xiao Xu, Yang Qu, Xing Ding, and Hao Chen. "Surface plasmon resonance-induced visible-light photocatalytic performance of silver/silver molybdate composites." Chinese Journal of Catalysis 38, no. 2 (February 2017): 260–69. http://dx.doi.org/10.1016/s1872-2067(16)62553-6.

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33

Mandanici, Andrea, Anna Raimondo, Mauro Federico, Maria Cutroni, Piercarlo Mustarelli, Cristina Armellini, and Francesco Rocca. "Ionic conductivity, electric modulus and mechanical relaxations in silver iodide–silver molybdate glasses." Journal of Non-Crystalline Solids 401 (October 2014): 254–57. http://dx.doi.org/10.1016/j.jnoncrysol.2013.12.025.

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34

Bao, Zhiyong, Li Zhang, and Yucheng Wu. "Silver nanoparticles and silver molybdate nanowires complex for surface-enhanced Raman scattering substrate." Frontiers of Optoelectronics in China 4, no. 2 (June 2011): 166–70. http://dx.doi.org/10.1007/s12200-011-0157-6.

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35

Deb, B., and A. Ghosh. "Microstructural study of Ag2S doped silver molybdate glass-nanocomposites." Journal of Alloys and Compounds 509, no. 5 (February 2011): 2256–62. http://dx.doi.org/10.1016/j.jallcom.2010.10.197.

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36

Rafiuddin, M. A. Beg, and Afaq Ahmad. "Solid-state reaction between silver molybdate and mercuric chlorobromide." Journal of Solid State Chemistry 80, no. 1 (May 1989): 94–101. http://dx.doi.org/10.1016/0022-4596(89)90035-2.

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37

Bréchignac, C., Ph Cahuzac, N. Kebaili, A. Lando, A. Masson, and M. Schmidt. "Synthesis of silver molybdate clusters driven by laser-annealing." Journal of Chemical Physics 121, no. 19 (November 15, 2004): 9617–22. http://dx.doi.org/10.1063/1.1805497.

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38

Shukor, Mohd Yunus, Muhammad Othman, Kabiru Ibrahim Karamba, Mohd Izuan Effendi Halmi, Mohd Fadhil Rahman, Nur Adeela Yasid, Siti Aqlima Ahmad, and Hafeez Muhammad Yakasai. "Isolation and characterization of molybdenum-reducing and PEG-degrading Enterobacter cloacae strain KIK-14 in agricultural soil from Nigeria." Journal of Environmental Microbiology and Toxicology 5, no. 1 (July 31, 2017): 4–11. http://dx.doi.org/10.54987/jemat.v5i1.414.

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Today, numerous researches have demonstrated the cost-effectiveness of bioremediation to waste removal from agricultural and industrial sectors particularly at lower levels of the toxicants, where other physicochemical techniques are ineffective. Multiple toxicant remediation by a single microorganism is important for remediation of sites contaminated with numerous toxicants. In this work, a molybdenum-reducing bacterium was screened for its ability to use the xenobiotic polyethylene glycol (PEG) as the sole source of carbon for growth and as electron donor source for molybdate reduction. Biochemical analysis results in the tentative identification of the isolate as Enterobacter cloacae strain KIK-14. The use of PEGs as an electron donor in this bacterium did not support molybdenum-blue production, even though the bacterium grew well on PEGs 200, 300, 600 and 1000 independent of molybdate reduction. Reduction of molybdate to Mo-blue was optimal at pH between 6.0 and 6.3, the temperature between 25 and 37 oC, molybdate and phosphate concentrations between 15 and 20 mM and between 5.0 and 7.5 mM respectively. The best electron donor source supporting the reduction process was glucose. The Mo-blue absorption spectrum resembles reduced phosphomolybdate and is similar to that of the previous Mo-reducing bacterium. At 2 ppm of silver, mercury and copper, molybdenum reduction was inhibited by 41.5, 57.1 and 40.5%, respectively. The ability of this bacterium to detoxify mixed toxicants makes it an important tool for bioremediation.

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Pellissari, Claudia Viviane Guimarães, Carlos Eduardo Vergani, Elson Longo, Ana Claudia Pavarina, Paula Volpato Sanitá, Walter Luiz Siqueira, and Janaina Habib Jorge. "In Vitro Toxic Effect of Biomaterials Coated with Silver Tungstate or Silver Molybdate Microcrystals." Journal of Nanomaterials 2020 (January 28, 2020): 1–9. http://dx.doi.org/10.1155/2020/2971827.

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Purpose. This study evaluated the cytotoxicity of antimicrobial silver tungstate (Ag2WO4) or silver molybdate (Ag2MoO4) microcrystals coating biomaterials. Materials and Methods. The coating procedure was performed onto titanium, zirconia, and acrylic resin specimens. Eluates of the coated specimens were obtained, which were used for cytotoxicity analyses, including Alamar Blue, MTT, and CytoTox-ONE tests. Data were analyzed using two-way ANOVA, followed by the Tukey test (α = 0.05). The results of each experimental group were also compared to those of the control of living cells, taken as 100% cell viability. Results. In general, it was observed that the percentage of living cells from all biomaterials coated with both microcrystals was statistically different compared to the ones from the uncoated sample groups, except for the results from MTT of specimens of Ti coated with α-Ag2MoO4. All uncoated biomaterials were classified as noncytotoxic by the three assays used in the present study. It was observed that the microcrystals in solution were strongly cytotoxic, with death of almost 100% of cells, from the analysis of the results of the Alamar Blue assay. Conclusion. The most biomaterials coated with both microcrystals showed some degree of cytotoxicity in the different assays. The results described herein should be seen as an alert to the use of microcrystals, which can expose patients to health risks.

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Karamba, Ibrahim Kabiru, and Hafeez Yakasai. "Isolation and Characterization of a Molybdenum-reducing and Methylene Blue-decolorizing Serratia marcescens strain KIK-1 in Soils from Nigeria." Bioremediation Science and Technology Research 6, no. 1 (July 31, 2018): 1–8. http://dx.doi.org/10.54987/bstr.v6i1.392.

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Bioremediation of toxic compound in polluted environment is currently considered as the most economical and ecofriendly approach, particularly at a lower concentration of the toxicant, where other physicochemical techniques are ineffective. In this work, molybdenum-reducing bacterium with the capacity to decolorize various azo and triphenyl methane dyes independent of molybdenum reduction was isolated from contaminated soil. The bacterium reduces molybdate to Mo-blue optimally at pH between 5.8 and 6.5, temperature, between 34 and 37 oC, molybdate concentration between 10 and 25 mM and phosphate concentration, 5.0 mM. Glucose was the best electron donor supporting molybdate reduction followed by sucrose, maltose, trehalose, d-mannose, glycerol, d-mannitol, d-sorbitol, myo-inositol, d-adonitol and salicin in descending order. The absorption spectrum of Mo-blue produced was similar to other previous Mo-reducing bacteria, and closely resembles a reduced phosphomolybdate. About 78.1, 63.4, 45.5 and 17.8% of the molybdenum reduction in this bacterium was inhibited by 2 ppm mercury (ii), silver (i), copper (ii) and chromium (vi), respectively. The biochemical analysis resulted in a tentative identification of the bacterium as Serratia marcescens strain KIK-1. The ability of this bacterium to detoxify molybdenum and decolorize azo dye makes this bacterium an important tool for bioremediation.

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Maarof, Mohd Zamros, Mohd Yunus Shukor, Othman Mohamad, Kabiru Ibrahim Karamba, Mohd Izuan Effendi Halmi, Mohd Fadhil Abd Rahman, and Hafeez Muhammad Yakasai. "Isolation and Characterization of a Molybdenum-reducing Bacillus amyloliquefaciens strain KIK-12 in Soils from Nigeria with the Ability to grow on SDS." Journal of Environmental Microbiology and Toxicology 6, no. 1 (July 31, 2018): 13–20. http://dx.doi.org/10.54987/jemat.v6i1.401.

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The annual production of chemical toxins and organic pollutants has reached an alarming level. Their eradication from the environment is immensely needed, and bioremediation provides a better alternative for this task. In this study, the ability of molybdenum-reducing bacterium isolated from polluted soil to grow and reduce molybdenum on a variety of hydrocarbons and detergents was investigated. The bacterium was found to reduce molybdate to molybdenum blue at an optimum temperature between 25 and 34 oC, pH between 5.8 and 6.3, molybdate concentration between 30 and 50 mM and phosphate concentration between 5.0 and 7.5 mM. The best electron donor hat support molybdate reduction was glucose, followed by sucrose, fructose, maltose, lactose, l-arabinose, d-mannose, mannitol and cellobiose in decreasing order. The absorption spectrum of the resultant Mo-blue was analogous to that of previous Mo-reducing bacterium and bear resemblance with reduced phosphomolybdate. At 2 ppm mercury (ii), copper (ii) and silver (i) molybdenum reduction was inhibited by 82.4, 61.9 and 47.50%, respectively. Based on the biochemical examination, the bacterium was tentatively identified as Bacillus amyloliquefaciens strain KIK-12. The ability of this bacterium to degrade detergent and detoxify molybdenum makes it a vital tool for bioremediation

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Halmi, M. I. E., S. W. Zuhainis, M. T. Yusof, N. A. Shaharuddin, W. Helmi, Y. Shukor, M. A. Syed, and S. A. Ahmad. "Hexavalent Molybdenum Reduction to Mo-Blue by a Sodium-Dodecyl-Sulfate-DegradingKlebsiella oxytocaStrain DRY14." BioMed Research International 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/384541.

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Bacteria with the ability to tolerate, remove, and/or degrade several xenobiotics simultaneously are urgently needed for remediation of polluted sites. A previously isolated bacterium with sodium dodecyl sulfate- (SDS-) degrading capacity was found to be able to reduce molybdenum to the nontoxic molybdenum blue. The optimal pH, carbon source, molybdate concentration, and temperature supporting molybdate reduction were pH 7.0, glucose at 1.5% (w/v), between 25 and 30 mM, and 25°C, respectively. The optimum phosphate concentration for molybdate reduction was 5 mM. The Mo-blue produced exhibits an absorption spectrum with a maximum peak at 865 nm and a shoulder at 700 nm. None of the respiratory inhibitors tested showed any inhibition to the molybdenum-reducing activity suggesting that the electron transport system of this bacterium is not the site of molybdenum reduction. Chromium, cadmium, silver, copper, mercury, and lead caused approximately 77, 65, 77, 89, 80, and 80% inhibition of the molybdenum-reducing activity, respectively. Ferrous and stannous ions markedly increased the activity of molybdenum-reducing activity in this bacterium. The maximum tolerable concentration of SDS as a cocontaminant was 3 g/L. The characteristics of this bacterium make it a suitable candidate for molybdenum bioremediation of sites cocontaminated with detergent pollutant.

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McManis, G. E., M. H. Miles, and A. N. Fletcher. "The high rate discharge characteristics of silver chromate, silver molybdate, and silver tungstate cathodes in molten nitrate electrolytes." Journal of Power Sources 15, no. 2-3 (June 1985): 141–56. http://dx.doi.org/10.1016/0378-7753(85)80068-9.

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Bhattacharya, S., and A. Ghosh. "Transport properties of AgI doped silver molybdate superionic glass-nanocomposites." Journal of Physics: Condensed Matter 17, no. 37 (September 2, 2005): 5655–62. http://dx.doi.org/10.1088/0953-8984/17/37/004.

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45

BHATTACHARYA, S., and A. GHOSH. "Relaxation of silver ions in fast ion conducting molybdate glasses." Solid State Ionics 176, no. 13-14 (April 29, 2005): 1243–47. http://dx.doi.org/10.1016/j.ssi.2005.03.002.

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46

Rafiuddin and M. A. Beg. "Interaction of silver molybdate and mercuric bromoiodide in solid state." Journal of Solid State Chemistry 75, no. 1 (July 1988): 7–14. http://dx.doi.org/10.1016/0022-4596(88)90297-6.

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47

Wang, Ying, Yu Liu, Xiaojian Lu, Zuopeng Li, Haining Zhang, Xinjiang Cui, Yan Zhang, Feng Shi, and Youquan Deng. "Silver-molybdate electrocatalysts for oxygen reduction reaction in alkaline media." Electrochemistry Communications 20 (July 2012): 171–74. http://dx.doi.org/10.1016/j.elecom.2012.05.004.

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48

Hariharan, K., and C. Sangamithra. "Mixed mobile ion effect in copper and silver molybdate glasses." Materials Chemistry and Physics 32, no. 3 (October 1992): 240–43. http://dx.doi.org/10.1016/0254-0584(92)90205-m.

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49

Nagaraju, G., G. T. Chandrappa, and Jacques Livage. "Synthesis and characterization of silver molybdate nanowires, nanorods and multipods." Bulletin of Materials Science 31, no. 3 (June 2008): 367–71. http://dx.doi.org/10.1007/s12034-008-0057-6.

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50

Nasri, Rawia, Saïda Fatma Chérif, and Mohamed Faouzi Zid. "Structure cristalline de la triple molybdate Ag0.90Al1.06Co2.94(MoO4)5." Acta Crystallographica Section E Crystallographic Communications 71, no. 4 (March 21, 2015): 388–91. http://dx.doi.org/10.1107/s2056989015005290.

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Silver(I) aluminiun tricobalt(II) pentakis[tetraoxidomolybdate(VI)], Ag0.90Al1.06Co2.94(MoO4)5, was synthesized using a solid-state reaction at 845 K. The structure can be described as a three-dimensional framework formed from dimericM2O10(M= Co/Al) and trimericM3O14units linked to MoO4tetrahedra by sharing corners, with the cavities occupied by disordered Ag+cations. It is shown that the Co and Al atoms occupy common positions with different occupancies. The Ag+cations are located at two different sites with occupancies of 0.486 (1) and 0.408 (1). The title coumpond is isotypic with NaMg3Al(MoO4)5and NaFe4(MoO4)5. Differences and similarities with other related structures are discussed.

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