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Journal articles on the topic 'Hydroxidu'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Balram, Anirudh, Jie Chao Jiang, Moisés Hernández Fernández, and Dennis De Sheng Meng. "Nickel-Cobalt Double Hydroxide Decorated Carbon Nanotubes via Aqueous Electrophoretic Deposition towards Catalytic Glucose Detection." Key Engineering Materials 654 (July 2015): 70–75. http://dx.doi.org/10.4028/www.scientific.net/kem.654.70.

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In this work, we present a facile technique based on electrophoretic deposition (EPD) to produce transition metal hydroxide decorated carbon nanotubes (CNT) for electrochemical applications. We specifically explore the performance of nickel-cobalt hydroxides given their high activity, conductivity and stability as compared to the individual hydroxides. We exploit the high local pH at the negative electrodes during water-based EPD to form nanoparticles of nickel-cobalt hydroxides in situ on the CNT surface. We focus our work here on obtaining functional and conductive deposits on CNTs. The hydr

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2

Alcântara, Darder, Aranda, and Ruiz-Hitzky. "Zein-layered hydroxide biohybrids: strategies of synthesis and characterization." Materials 13, no. 4 (2020): 825. http://dx.doi.org/10.3390/ma13040825.

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This work constitutes a basic study about the first exploration on the preparation of biohybrids based on the corn protein zein and layered metal hydroxides, such as layered double hydroxides (LDH) and layered single hydroxides (LSHs). For this purpose, MgAl layered double hydroxide and the Co2(OH)3 layered single hydroxide were selected as hosts, and various synthetic approaches were explored to achieve the formation of the zein-layered hydroxide biohybrids, profiting from the presence of negatively charged groups in zein in basic medium. Zein-based layered hydroxide biohybrids were character

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3

Yuan, Long, Keke Huang, Wenchun Feng, et al. "Design and synthesis of metal hydroxide three-dimensional inorganic cationic frameworks." Dalton Transactions 47, no. 10 (2018): 3339–45. http://dx.doi.org/10.1039/c8dt00039e.

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We developed the largest family of three-dimensional inorganic cationic frameworks that built by edge-sharing rare-earth and transition metal hydroxide polyhedral units,which indicates the successful conversion of layered double hydroxides (LDHs) and layered rare-earth hydroxides (LREHs) to 3-D structures.

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4

Shang, Wei, Chang Jiu Liu, and Yu Qing Wen. "Morphology and Electrochemical Performance of Amorphous Nickel Hydroxide Added Anion." Advanced Materials Research 834-836 (October 2013): 466–71. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.466.

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Amorphous nickel hydroxides added anion (PO43-) has been prepared by chemical precipitation method combined with rapid quench technique. The morphology of the prepared samples were characterized by scanning electron microscope (SEM), and energy dispersive spectroscopy (EDS). The effect of anion on the electrochemical performance of the prepared nickel hydroxides were investigated by charge/discharge tests and cyclic voltammetry (CV). The results demonstrated that amorphous nickel hydroxide added PO43-has better electrochemical performance, such as higher discharge potential, better reaction re

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5

Kroftová, Klára, David Škoda, Ivo Kuřitka, and Jan Kubát. "TECHNOLOGY OF PREPARATION OF BARIUM AND MAGNESIUM HYDROXIDE NANODISPERSION AND POSSIBILITIES OF THEIR USE IN MONUMENT CARE." Acta Polytechnica CTU Proceedings 21 (March 21, 2019): 21–23. http://dx.doi.org/10.14311/app.2019.21.0021.

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An application of hydroxide nanoparticles in preservation of cultural heritage attracted great interest. The nanodispersions of calcium, magnesium or barium hydroxides exhibit high performance in consolidation abilities. In this work we focused on preparation of magnesium and barium hydroxide nanoparticles. For the synthetic procedure we used acetate precursors and sodium hydroxide. Obtained particles were dispersed in 2-propanol. Hydroxide nanoparticles were characterized by powder X-Ray diffraction, infrared spectroscopy and scanning electron microscopy. It was observed that smaller particle

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6

Harb, Hassan, Lee M. Thompson, and Hrant P. Hratchian. "On the linear geometry of lanthanide hydroxide (Ln-OH, Ln = La–Lu)." Physical Chemistry Chemical Physics 21, no. 39 (2019): 21890–97. http://dx.doi.org/10.1039/c9cp01560d.

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7

Manohara, G. V., Li Li, Andrew Whiting, and H. Chris Greenwell. "Ultra-high aspect ratio hybrid materials: the role of organic guest and synthesis method." Dalton Transactions 47, no. 9 (2018): 2933–38. http://dx.doi.org/10.1039/c7dt04312k.

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8

Rodriguez, Luis E. G., Alesandro Bail, Rodolfo O. Castillo, and Gregorio G. C. Arízaga. "Removal and Extraction of Carboxylic Acids and Non-ionic Compounds with Simple Hydroxides and Layered Double Hydroxides." Current Pharmaceutical Design 26, no. 6 (2020): 650–63. http://dx.doi.org/10.2174/1381612826666191226103623.

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Carboxylic acids are an important natural component as a final product or intermediates for syntheses. They are produced in plants, animals and also as products from biotechnological processes. This review presents the use of single hydroxide particles and layered double hydroxides as alternative adsorbents to remove carboxylic acids from liquid media. The proposal to use hydroxide particles is based on its affinity to adsorb or intercalate carboxylic acids. Besides, the change in properties of the adsorbate-sorbate product evinces that this intermediate can be used as a vehicle to transport a

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9

Licskó, István. "On the Types of Bond Developing between the Aluminium and Iron (III) Hydroxides and Organic Substances." Water Science and Technology 27, no. 11 (1993): 249–52. http://dx.doi.org/10.2166/wst.1993.0284.

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During the coagulation-flocculation processes involved in the treatment of surface waters, dissolved organics are also incorporated into the aluminium and iron (III) hydroxide flocs. A part of the dissolved organics can thus be removed by simple solid-liquid phase separation techniques, like sedimentation, flotation, sand filtration. According to laboratory evidence, durable bonds between the coagulant, or the metal hydroxides thereof, develop only over the extremely short (a few seconds) period which elapses from the formation of the metal hydroxides to the intense aggregation of the metal hy

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10

Lima, Maurício Batista de, Marcela Bergamaschi Tercini, Sydney Ferreira Santos, Fernando dos Santos Ortega, and Humberto Naoyuki Yoshimura. "Effects of Milling pH and Hydrothermal Treatment on Formation of Nanostructured Boehmite Binder for Alumina Extrusion." Journal of Nanomaterials 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/6273095.

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The in situ formation of nanostructured aluminum hydroxides on the surface of alumina particles, which can work as inorganic binder, was reported in this paper. The effect of the suspension pH during milling of alumina powder and subsequent hydrothermal treatment for the hydroxide formation and microstructure was depicted. Under acidic pH condition, the formation of hydroxides was not observed. When the pH of suspension changed from acidic to basic during milling, bayerite [Al(OH)3] nanoparticles were formed, but only a fraction of this hydroxide was converted to boehmite (AlOOH) during subseq

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11

Wang, Xin M., and Ping Xiao. "Solvothermal synthesis of zirconia and yttria-stabilized zirconia nanocrystalline particles." Journal of Materials Research 22, no. 1 (2007): 46–55. http://dx.doi.org/10.1557/jmr.2007.0012.

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A solvothermal method was used to prepare zirconia and yttria-stabilized zirconia (YSZ) particles using zirconium hydroxide and yttrium hydroxide particles as precursors and ethanol or isopropanol as reaction media. The particle properties were characterized with x-ray diffractometry, scanning electron microscopy, transmission electron microscopy, thermal analysis, laser particle-size analysis, nitrogen adsorption (Brunauer–Emmett–Teller method) and Zeta potential analysis. Cubic/tetragonal ZrO2 and YSZ nanocrystals with crystallite size around 5 nm were obtained. The effect of different hydro

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12

Gypser, Stella, Elisabeth Schütze, and Dirk Freese. "Single and Binary Fe- and Al-hydroxides Affect Potential Phosphorus Mobilization and Transfer from Pools of Different Availability." Soil Systems 5, no. 2 (2021): 33. http://dx.doi.org/10.3390/soilsystems5020033.

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Phosphorus (P) fixation is a global problem for soil fertility and negatively impacts agricultural productivity. This study characterizes P desorption of already fixed P by using KCl, KNO3, histidine, and malic acid as inorganic and organic compounds, which are quite common in soil. Goethite, gibbsite, and ferrihydrite, as well as hydroxide mixtures with varying Fe- and Al-ratio were selected as model substances of crystalline and amorphous Fe- and Al-hydroxides. Especially two- and multi-component hydroxide systems are common in soils, but they have barely been included in desorption studies.

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13

Dewi, I. Ap, W. I. Kelso, and D. B. Johnson. "A study of field drain ochre deposits. 1. Abiotic chemical precipitation." Journal of Agricultural Science 108, no. 2 (1987): 341–45. http://dx.doi.org/10.1017/s0021859600079351.

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SummaryIt was demonstrated that abiotic chemical precipitation could account for a major proportion of iron hydroxide deposition in drainage water. In filter-sterilized (0·22 μm) drainage water samples from ochreous sites 84% of the total iron in solution was precipitated within 48 h. It was also shown that ferric hydroxide precipitates could catalyse the precipitation of ferric hydroxides in drainage water exposed to the atmosphere.

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14

Yokogawa, Yoshiyuki, Kodai Kakehashi, Hidemitsu Wakabayashi, et al. "VSC Adsorptive Property of Zinc or Iron Oxide in Comparison with that of Layered Double Hydroxide Containing Zinc of Iron." Key Engineering Materials 782 (October 2018): 250–55. http://dx.doi.org/10.4028/www.scientific.net/kem.782.250.

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Bad breath is mainly caused by malodorous materials, volatile sulfur compounds (VSC), hydrogen sulfide (H2S). Pharmaceutical drugs should be effective but limited, because bacteria at deep periodontal pocket may be sterilized but cannot be washed out and the malodorous compounds remain. The absorbents for the malodorous compounds are expected to prevent the teeth from decaying and peiodontics disease. The layered double hydroxides, of which composition is A1-xBx(OH)2Cx/n·mH2O, where A and B are zinc and Fe ions are effective as the absorbents for VSC. The VSC adsorption capabilities of zinc or

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15

Chen, Chunping, Miaosen Yang, Qiang Wang, Jean-Charles Buffet, and Dermot O'Hare. "Synthesis and characterisation of aqueous miscible organic-layered double hydroxides." J. Mater. Chem. A 2, no. 36 (2014): 15102–10. http://dx.doi.org/10.1039/c4ta02277g.

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16

Bourrié, Guilhem, Jihaine Ben Nacib, Georges Ona-Nguema, and Fabienne Trolard. "Absence of solid solution between Fe(II) and Mg(II) hydroxides and consequences on formation of fougerite and smectites." E3S Web of Conferences 98 (2019): 04003. http://dx.doi.org/10.1051/e3sconf/20199804003.

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As there exists extended solid solutions between ferrous and magnesian silicates, experiments were conducted to check if ferrous and magnesian hydroxides can co-precipitate in a solid solution. Results show that no solid solution forms and instead Fe(II) and Mg(II) hydroxides precipitate separately with the same solubilities as pure components. However, in fougerite, F(III), Fe(II) and Mg(II) coexist in a brucitic type hydroxide, with an extended solid solution. This implies that fougerite formation results from Fe(III) precipitation, Fe(III) being surrounded by divalent Fe(II) and Mg(II) to c

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17

Hall, David S., David J. Lockwood, Christina Bock, and Barry R. MacDougall. "Nickel hydroxides and related materials: a review of their structures, synthesis and properties." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2174 (2015): 20140792. http://dx.doi.org/10.1098/rspa.2014.0792.

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This review article summarizes the last few decades of research on nickel hydroxide, an important material in physics and chemistry, that has many applications in engineering including, significantly, batteries. First, the structures of the two known polymorphs, denoted as α -Ni(OH) 2 and β -Ni(OH) 2 , are described. The various types of disorder, which are frequently present in nickel hydroxide materials, are discussed including hydration, stacking fault disorder, mechanical stresses and the incorporation of ionic impurities. Several related materials are discussed, including intercalated α -

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18

Morais, Alysson F., Dimy Nanclares, Ivan G. N. Silva, et al. "Mesostructuring layered materials: self-supported mesoporous layered double hydroxide nanotubes." Nanoscale 13, no. 27 (2021): 11781–92. http://dx.doi.org/10.1039/d1nr02477a.

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Incorporation of Eu3+ in the hydroxide layers of layered double hydroxides (LDH) enables the curvature of the LDH sheets, allowing the self-assembly of high surface area LDH nanotubes through a facile soft-templating strategy.

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19

Zhao, Jiawen, Shuang Xu, Hongjie Wu, Zhixiong You, Lidan Deng, and Xinhong Qiu. "Metal–support interactions on Ru/CaAlOx catalysts derived from structural reconstruction of Ca–Al layered double hydroxides for ammonia decomposition." Chemical Communications 55, no. 96 (2019): 14410–13. http://dx.doi.org/10.1039/c9cc05706d.

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Strong metal–support interaction (SMSI) over Ru/CaAlO<sub>x</sub> was constructed by utilizing the surface structural reconstruction of Ca–Al layered double hydroxides (LDHs) in aqueous solution and their subsequent hydroxide-to-oxide transformations.

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20

Oliveira, Julio C. Machado de, Flávio R. F. Alves, Milton de Uzeda, Isabela N. Rôças, and José F. Siqueira Jr. "Influence of serum and necrotic soft tissue on the antimicrobial effects of intracanal medicaments." Brazilian Dental Journal 21, no. 4 (2010): 295–300. http://dx.doi.org/10.1590/s0103-64402010000400001.

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The purpose of this study was to investigate the influence of serum and necrotic soft tissue on the antimicrobial activity of intracanal medicaments. The medicaments tested were: calcium hydroxyde/glycerin paste, calcium hydroxide/chlorhexidine paste, calcium hydroxide/camphorated paramonochlorophenol/glycerin paste, and chlorhexidine/zinc oxide paste. Survival of Enterococcus faecalis and Candida albicans exposed to the medicaments tested in the presence or absence of serum or necrotic tissue was monitored in three in vitro experiments where samples for culturing were taken at different time

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21

Sears, Jeremiah, Roger Cramer, and Timothy Boyle. "Crystal structure of hydroxy scandium nitrate chloride." Acta Crystallographica Section E Crystallographic Communications 75, no. 5 (2019): 540–42. http://dx.doi.org/10.1107/s2056989019003918.

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Each Sc3+ ion in the title salt, di-μ-hydroxido-bis[triaqua(nitrato-κ2 O,O′)scandium(III)] dichloride, [Sc2(NO3)2(OH)2(H2O)6]Cl2, is coordinated by a nitrate anion, two hydroxide ions and three water molecules to generate a distorted pentagonal–bipyramidal ScO7 coordination polyhedron. The complete {[(NO3)(μ-OH)Sc(H2O)3]2}2+ ion is generated by crystallographic inversion symmetry. The nitrate anion binds in a bidentate fashion whereas the hydroxide ions are bridged between two Sc centers. Two charge-balancing Cl− ions are located in the outer sphere. In the extended structure, O—H...O and O—H.

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22

Pilarska, Agnieszka, Marek Lukosek, Katarzyna Siwińska-Stefańska, Krzysztof Pilarski, and Teofil Jesionowski. "Use of MgO to Promote the Oxyethylation Reaction of Lauryl Alcohol." Polish Journal of Chemical Technology 16, no. 2 (2014): 36–42. http://dx.doi.org/10.2478/pjct-2014-0027.

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Abstract Synthesis of magnesium hydroxide was performed by the precipitation method with the use of magnesium sulfate and sodium hydroxide. The infiuence of temperature and ratio of reagents was studied. Magnesium hydroxides, and the magnesium oxides obtained from them by thermal decomposition, were analyzed to determine their bulk density, polydispersity and particle size. The magnesium oxide with the largest surface area was tested as a catalyst in the oxyethylation of lauryl alcohol, and shown to be selective but poorly reactive in comparison with commercially available catalysts. Further s

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23

Piana, Tatiana Dantas, Maria de Fátima Malvar Gesteira, Erica Dos Santos Carvalho, et al. "Evaluation of the antimicrobial effect of calcium hydroxide combined to different vehicles." Revista Odonto Ciência 31, no. 2 (2016): 89. http://dx.doi.org/10.15448/1980-6532.2016.2.21522.

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Objective: To evaluate the potentiating effect of different substances in antimicrobial action of calcium hydroxide.Methods: The agar diffusion method, was used with well technique, to analyze seven substances associated to calcium hydroxide to make some pastes, they are: chlorexidine, saline, anesthetic, malvatricin, propolis, hypochlorite, paramonochlorophenol.Results: The pastes with malvatricin and paramonochlorophenol presented greater inhibition zones against Enterococcus faecalis.Conclusion: There was potentialization in antimicrobial effect of calcium hydroxide when associated to param

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Ramanaidou, E., and Y. Noack. "Palagonites of the Red Sea: a new occurrence of hydroxysulphate." Mineralogical Magazine 51, no. 359 (1987): 139–43. http://dx.doi.org/10.1180/minmag.1987.051.359.15.

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AbstractPalagonites from the Red Sea consist of two zones: an orange palagonite which is a mixture of Mg-Al double hydroxide, Al-hydroxide and an undetermined Si-K phase, and a white palagonite, similar to motukoreaite, a Mg-Al hydroxy-sulphate-carbonate. This mineral, frequent in experimental alteration of glass by seawater, is discovered for the first time in natural palagonite. Hydroxysulphates and hydroxides are the precursors of phyllosilicates, generally found in palagonites. The very young palagonites of the Red Sea are the first link between the natural and experimental observations.

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25

Li, Chang Fa, and Ji Guang Li. "(Gd_0.95Eu_0.05)(OH)₃ Nanomaterials via Hydrothermal Processing and their Transformation into Single Crystalline (Gd_0.95Eu_0.05)₂O₃ with Enhanced Photoluminescence." Advanced Materials Research 320 (August 2011): 309–13. http://dx.doi.org/10.4028/www.scientific.net/amr.320.309.

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In this work, hexagonal solid solutions of (Gd0.95Eu0.05)(OH)3with two distinctive morphologies of nanorods and nanotubes were successfully synthesized via hydrothermal treatment of mixed nitrate solutions in the presence of ammonium hydroxide. The hydroxide samples exhibited characteristic Eu3+photoluminescence through the energy transfer from Gd3+to Eu3+and the self-excitation of Eu3+. The hydroxide precursors transformed into cubic (Gd0.95Eu0.05)2O3at ~500 °C via an intermediate monoclinic (Gd0.95Eu0.05)OOH phase, and the Eu3+coordination accordingly experienced symmetry changes fromD3htoC2

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26

Jamshidi, Edris, and Faranak Manteghi. "Methyl Orange Adsorption by Fe2O3@Co-Al-Layered Double Hydroxide." Proceedings 41, no. 1 (2020): 64. http://dx.doi.org/10.3390/ecsoc-23-06617.

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A magnetic composite consisting of iron oxide and a cobalt–aluminum-layered double hydroxide, Fe2O3@Co-Al-layered double hydroxide was prepared through linking of Fe2O3 to Co-Al layered double hydroxide (LDH) by sodium acetate. Layered double hydroxides are generally described as [M2+1–xM3+x(OH)2] [An–x/n·mH2O], where M2+ and M3+ are divalent and trivalent metal cations, respectively, and A is an n-valent interlayer guest anion. The composite was characterized by XRD, FTIR and UV-Vis. spectroscopy methods. Afterwards, the composite was used for methyl-orange adsorption in aqueous solution. The

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27

Khan, Muhammad Saad, Cornelius Borecho Bavoh, Khor Siak Foo, et al. "Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates." Molecules 26, no. 2 (2021): 275. http://dx.doi.org/10.3390/molecules26020275.

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This study evaluates the kinetic hydrate inhibition (KHI) performance of four quaternary ammonium hydroxides (QAH) on mixed CH4 + CO2 hydrate systems. The studied QAHs are; tetraethylammonium hydroxide (TEAOH), tetrabutylammonium hydroxide (TBAOH), tetramethylammonium hydroxide (TMAOH), and tetrapropylammonium hydroxide (TPrAOH). The test was performed in a high-pressure hydrate reactor at temperatures of 274.0 K and 277.0 K, and a concentration of 1 wt.% using the isochoric cooling method. The kinetics results suggest that all the QAHs potentially delayed mixed CH4 + CO2 hydrates formation du

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Khan, Muhammad Saad, Cornelius Borecho Bavoh, Khor Siak Foo, et al. "Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates." Molecules 26, no. 2 (2021): 275. http://dx.doi.org/10.3390/molecules26020275.

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This study evaluates the kinetic hydrate inhibition (KHI) performance of four quaternary ammonium hydroxides (QAH) on mixed CH4 + CO2 hydrate systems. The studied QAHs are; tetraethylammonium hydroxide (TEAOH), tetrabutylammonium hydroxide (TBAOH), tetramethylammonium hydroxide (TMAOH), and tetrapropylammonium hydroxide (TPrAOH). The test was performed in a high-pressure hydrate reactor at temperatures of 274.0 K and 277.0 K, and a concentration of 1 wt.% using the isochoric cooling method. The kinetics results suggest that all the QAHs potentially delayed mixed CH4 + CO2 hydrates formation du

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29

Arishige, Yuji, Daiju Kubo, Kiyoharu Tadanaga, Akitoshi Hayashi, and Masahiro Tatsumisago. "Electrochemical oxygen separation using hydroxide ion conductive layered double hydroxides." Solid State Ionics 262 (September 2014): 238–40. http://dx.doi.org/10.1016/j.ssi.2013.09.009.

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Meng, Zilin, Yihe Zhang, Qian Zhang, et al. "Novel synthesis of layered double hydroxides (LDHs) from zinc hydroxide." Applied Surface Science 396 (February 2017): 799–803. http://dx.doi.org/10.1016/j.apsusc.2016.11.032.

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V., Dr Abirami, Dr A. Shafie Ahamed, Dr Bhavani S., and Dr Rajaraman G. "Comparative evaluation of anti-bacterial efficacy of silver nanoparticle, nanoparticle calcium hydroxide and calcium hydroxide against enterococcus faecalis biofilm- An In vitro study." International Journal of Dental Research 6, no. 2 (2018): 57. http://dx.doi.org/10.14419/ijdr.v6i2.13743.

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The purpose of this study was to evaluate the antibacterial efficacy of silver Nanoparticles, Nanoparticle calcium hydroxide and calcium hydroxide as intracanal medicament against Enterococcus faecalis bio film formed on root dentinThe Minimal inhibitory concentration test and Anti microbial test were conducted for silver nanoparticle, Nanoparticle calcium hydroxide. Teeth were inoculated with E.faecalis strains for 1month to establish a standard mono species bio film model. Biofilm formation is confirmed using SEM. The intracanal medicaments were placed inside the canal and colony forming uni

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Zhao, Yajun, Tao Sun, Qing Yin, et al. "Discovery of a new intercalation-type anode for high-performance sodium ion batteries." Journal of Materials Chemistry A 7, no. 25 (2019): 15371–77. http://dx.doi.org/10.1039/c9ta03753e.

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A CoFe layered double hydroxide (LDH) pillared by nitrates as an anode for sodium ion batteries exhibits high capacity with excellent cycling stability. An exceptional intercalation/de-intercalation mechanism for Na<sup>+</sup> storage has been revealed in metal hydroxides, rather than the routinely believed conversion reaction presenting in lithium ion batteries.

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Wu, Longfei, Linxia Huang та Mouhai Shu. "Poly[diaquadi-μ-hydroxido-κ4O:O-dinitrato-κ4O:O′-bis[3-(pyridin-4-yl-κN)-5-(pyridin-3-yl)-1,2,4-oxadiazole]dicopper(II)]". Acta Crystallographica Section E Structure Reports Online 68, № 4 (2012): m422—m423. http://dx.doi.org/10.1107/s1600536812010355.

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The title compound, [Cu2(NO3)2(OH)2(C12H8N4O)2(H2O)2]n, consists of a neutral polymeric CuIIcomplex in which each CuIIatom has a distorted octahedral geometry defined by a pyridyl N atom from a 3-(pyridin-3-yl)-5-(pyridin-4-yl)-1,2,4-oxadiazole ligand and five O atoms from a water molecule, two nitrates and two hydroxides. Two CuIIions are bridged by two hydroxide anions resulting in a Cu2O2loop, located across an inversion center and connected by the nitrate anions into a broad two-dimensional polymeric structure parallel to (100). In the crystal, there are O—H...O hydrogen bonds between the

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Taglieri, Giuliana, Valeria Daniele, and Ludovico Macera. "Synthesizing Alkaline Earth Metal Hydroxides Nanoparticles through an Innovative, Single-Step and Eco-Friendly Method." Solid State Phenomena 286 (January 2019): 3–14. http://dx.doi.org/10.4028/www.scientific.net/ssp.286.3.

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The objective of this paper is to introduce a patented and eco-friendly method to synthesize aqueous suspension of all types of alkaline-earth metal hydroxides nanoparticles (NPs). This method is based on an ion exchange process; the exchange takes place at ambient temperature/pressure, starts from cheap or renewable reagents and, in one single step, results in the creation of the crystalline desired nanoparticles in only a few minutes. In terms of structural and morphological features, the synthesized nanoparticles are characterized by means of XRD-Rietveld refinement, FTIR, and TEM. In parti

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GU, Lingzhu, Tianhang ZHANG, Kai ZHU, Daquan TANG, and Ke WU. "Effect of Various Metal Hydroxide Flame Retardants on the Rheological Properties of Asphalt Binder." Materials Science 25, no. 3 (2019): 348–55. http://dx.doi.org/10.5755/j01.ms.25.3.21572.

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Metal hydroxide has been widely used as flame retardant to reduce the hazards of tunnel fire, however, few researches investigate its effect on the rheological properties of asphalt binder systemically. This study explores and compares the effect and mechanisms of magnesium hydroxide (MH), aluminium hydroxide (ATH), hydrated lime (HL), and layer double hydroxides (LDHs) on the rutting resistance, anti-aging resistance, as well as the thermal cracking resistance of asphalt binder. Rotational viscosity (RV) test, dynamic shear rheometer (DSR) test, and bending beam rheometer (BBR) test are invol

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Gerlach, Deidra L., Ismael Nieto, Corey J. Herbst-Gervasoni, Gregory M. Ferrence, Matthias Zeller, and Elizabeth T. Papish. "Crystal structures of bis- and hexakis[(6,6′-dihydroxybipyridine)copper(II)] nitrate coordination complexes." Acta Crystallographica Section E Crystallographic Communications 71, no. 12 (2015): 1447–53. http://dx.doi.org/10.1107/s205698901502037x.

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Two multinuclear complexes synthesized from Cu(NO3)2and 6,6′-dihydroxybipyridine (dhbp) exhibit bridging nitrate and hydroxide ligands. The dinuclear complex (6,6′-dihydroxybipyridine-2κ2N,N′)[μ-6-(6-hydroxypyridin-2-yl)pyridin-2-olato-1:2κ3N,N′:O2](μ-hydroxido-1:2κ2O:O′)(μ-nitrato-1:2κ2O:O′)(nitrato-1κO)dicopper(II), [Cu2(C10H7N2O2)(OH)(NO3)2(C10H8N2O2)] or [Cu(6-OH-6′-O-bpy)(NO3)(μ-OH)(μ-NO3)Cu(6,6′-dhbp)], (I), with a 2:1 ratio of nitrate to hydroxide anions and one partially deprotonated dhbp ligand, forms from a water–ethanol mixture at neutral pH. The hexanuclear complex bis(μ3-bipyridin

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Mondillo, Nicola, Giuseppina Balassone, Maria Boni, et al. "Rare Earth Elements (REE) in Al- and Fe-(Oxy)-Hydroxides in Bauxites of Provence and Languedoc (Southern France): Implications for the Potential Recovery of REEs as By-Products of Bauxite Mining." Minerals 9, no. 9 (2019): 504. http://dx.doi.org/10.3390/min9090504.

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Bauxites in southern France (Provence and Languedoc) have been exploited since the beginning of the last century. Though most of the deposits are now subeconomic or mined-out, these bauxites represent model analogs for other economic bauxites of the world. These Cretaceous karst-type deposits lie directly on Jurassic carbonates, and have been formed through a combination of different processes: in-situ alteration of siliciclastic sediments deposited on carbonate platforms, and reworking of early bauxites in the karst network. In this study, we present preliminary bulk rock geochemical and in-s

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Gralik, Guilherme, Adriana Scoton Antonio Chinelatto, and Adilson Luiz Chinelatto. "Total and Partial Replacement of Quartz in Aluminum Hydroxides Porcelain Formulations." Materials Science Forum 798-799 (June 2014): 289–93. http://dx.doi.org/10.4028/www.scientific.net/msf.798-799.289.

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Alumina has been studied as a substitute for quartz triaxial porcelain formulations, but the high cost of the alumina raises the cost of production. The use of aluminum hydroxide from the Bayer process for obtaining aluminum, a source of alumina, is an alternative to alumina. In this work we used two aluminum hydroxides to replace the quartz composition of triaxial porcelain. The raw materials used were characterized by analysis of particle size distribution, scanning electron microscopy, diffraction and X-ray fluorescence. The compositions sintered were characterized by apparent density, appa

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Zhang, Ya-Qian, Vladislav A. Blatov, Xiu-Xiu Lv, et al. "Construction of (3,8)-connected three-dimensional cobalt(II) and copper(II) coordination polymers with 1,3-bis[(1,2,4-triazol-4-yl)methyl]benzene and benzene-1,3,5-tricarboxylate ligands." Acta Crystallographica Section C Structural Chemistry 75, no. 7 (2019): 960–68. http://dx.doi.org/10.1107/s205322961900826x.

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Coordination polymers (CPs) have been widely studied because of their diverse and adjustable topologies and wide-ranging applications in luminescence, chemical sensors, magnetism, photocatalysis, gas adsorption and separation. In the present work, two coordination polymers, namely poly[(μ5-benzene-1,3,5-tricarboxylato-κ6 O 1:O 1′:O 3:O 3:O 5,O 5′){μ3-1,3-bis[(1,2,4-triazol-4-yl)methyl]benzene-κ3 N:N′:N′′}di-μ3-hydroxido-dicobalt(II)], [Co2(C9H3O6)(OH)(C12H12N6)] n or [Co2(btc)(OH)(mtrb)] n , (1), and poly[[diaquabis(μ3-benzene-1,3,5-tricarboxylato-κ3 O 1:O 3:O 5)bis{μ3-1,3-bis[(1,2,4-triazol-4

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Muramatsu, Atsushi, Takafumi Sasaki, Yosuke Endo, Yuka Doi, and Kiyoshi Kanie. "Solvothermal Synthesis of ITO Nanoparticles Precisely Controlled in Size and Shape." Advances in Science and Technology 62 (October 2010): 50–55. http://dx.doi.org/10.4028/www.scientific.net/ast.62.50.

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Highly crystalline cubic indium tin oxide (ITO) nanoparticles with narrow size distribution were successfully prepared directly in one step from the mixed solution of indium and tin salts by the solvothermal method with lean ethylene glycol as a solvent. The addition of water must inhibit the formation of ITO crystals, but can strongly promote the formation of In(OH)3 and InOOH, including tin hydroxide. Since In(OH)3 and InOOH was not found in water-free EG system, the transformation of In(OH)3 and InOOH into In2O3 phase must be remarkably slow so that once formed indium hydroxides become fina

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Li, Guowan, Zhujian Huang, Chengyu Chen, et al. "Simultaneous adsorption of trace sulfamethoxazole and hexavalent chromium by biochar/MgAl layered double hydroxide composites." Environmental Chemistry 16, no. 1 (2019): 68. http://dx.doi.org/10.1071/en18132.

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Environmental contextWater contamination by antibiotics and heavy metals entails potential risks to both the environment and human health. Composite materials based on MgAl-layered double hydroxides and biochar simultaneously adsorbed the toxic sulfamethoxazole and CrVI metal species. These findings indicate that biochar/metal hydroxide composites could be valuable adsorbents for the simultaneous removal of trace antibiotics and metals from water. AbstractWater contamination by antibiotics and heavy metals has drawn wide attention because of the potential risks it poses to both the environment

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Frau, F., and C. Ardau. "Mineralogical controls on arsenic mobility in the Baccu Locci stream catchment (Sardinia, Italy) affected by past mining." Mineralogical Magazine 68, no. 1 (2004): 15–30. http://dx.doi.org/10.1180/0026461046810168.

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AbstractMineralogical-chemical techniques (XRD, SEM/EDX, WDXRF) and a sequential selective extraction procedure were applied to mine-waste materials and stream sediments from the Baccu Locci stream catchment (Sardinia, Italy) affected by serious As contamination as a consequence of past mining. Results indicate that solid-state speciation of As is mainly dominated by the presence of Fe(III) hydroxides (arsenical ferrihydrites with various Fe/As molar ratios) occurring as coatings of silicate grains, in which As is contained as sorbed or co-precipitated species. Scorodite (FeAsO4·2H2O) is commo

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Weng, Wubin, Tomas Leffler, Christian Brackmann, Marcus Aldén, and Zhongshan Li. "Spectrally Resolved Ultraviolet (UV) Absorption Cross-Sections of Alkali Hydroxides and Chlorides Measured in Hot Flue Gases." Applied Spectroscopy 72, no. 9 (2018): 1388–95. http://dx.doi.org/10.1177/0003702818763819.

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Spectrally resolved ultraviolet (UV) absorption cross-sections of gas-phase sodium chloride (NaCl), potassium hydroxide (KOH), and sodium hydroxide (NaOH) were measured, for the first time, in hot flue gases at different temperatures. Homogenous gas-phase NaCl, KCl (potassium chloride), NaOH, and KOH at temperatures 1200 K, 1400 K, 1600 K, and 1850 K were prepared in the post-flame zone of laminar flames by seeding nebulized droplets out of aqueous solution of corresponding alkali species. The amount of droplets seeded into the flame was kept constant, so the relative concentration of differen

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Ramesh, T. N., P. Vishnu Kamath, and C. Shivakumara. "Classification of stacking faults and their stepwise elimination during the disorder → order transformation of nickel hydroxide." Acta Crystallographica Section B Structural Science 62, no. 4 (2006): 530–36. http://dx.doi.org/10.1107/s0108768106013188.

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Nickel hydroxide samples obtained by strong alkali precipitation are replete with stacking faults. The local structures of the stacking faults resemble the stacking patterns of different polytypic modifications that are theoretically possible among the layered hydroxides. This resemblance becomes a basis for the classification of stacking faults into different types. Each type of stacking fault produces a characteristic non-uniform broadening of peaks in the X-ray powder diffraction pattern of nickel hydroxide. DIFFaX simulations aid the classification and quantification of stacking faults. Hy

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Espinoza, Eumarielys, and Luis Isernia. "Role of the lattice-energy from chemical-agents in the activation of highly-condensed carbons." Journal of the Serbian Chemical Society, no. 00 (2021): 27. http://dx.doi.org/10.2298/jsc201211027e.

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Highly condensed carbons from pet-coke were first treated with Na/K hydroxides and carbonates and then with H2SO4. The esterification reaction of palmitic acid reached conversions of up to 97 % on the yielded activated carbons. The results evidence the relationship between the efficacy of Na/K hydroxides and carbonates as treatment agents and their lattice potential energy. Moreover, the analysis of carbonaceous solids confirms that both surface area and acidity are primary factors promoting activity in the esterification reaction. Furthermore, the results do not indicate a direct relationship

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Sidorova, Elena N., Ella L. Dzidziguri, Yulia P. Vinichenko, et al. "Metal Nanoparticles Formation from Nickel Hydroxide." Materials 13, no. 20 (2020): 4689. http://dx.doi.org/10.3390/ma13204689.

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In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen

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Basak, Sergiusz, and Witold A. Charewicz. "Flotation of metal hydroxide precipitates. II. Flotation of zinc and cobalt hydroxides." Journal of Chemical Technology & Biotechnology 36, no. 12 (2007): 557–61. http://dx.doi.org/10.1002/jctb.280361203.

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Lu, Zhiyi, Wei Zhu, Xiaodong Lei, et al. "High pseudocapacitive cobalt carbonate hydroxide films derived from CoAl layered double hydroxides." Nanoscale 4, no. 12 (2012): 3640. http://dx.doi.org/10.1039/c2nr30617d.

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Tadanaga, K., K. Igarashi, T. Kubota, A. Miura, and M. Higuchi. "Development of Alkaline Fuel Cells Using Hydroxide-Ion Conductive Layered Double Hydroxides." ECS Transactions 69, no. 17 (2015): 385–89. http://dx.doi.org/10.1149/06917.0385ecst.

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Cao, Yali, Lang Liu, Dienzeng Jia, and Ding Quan Xiao. "Rapid Synthesis of Zinc Oxide and Lead Oxide Nanorods by One-Step Solid-State Reaction Methods at Ambient Conditions." Materials Science Forum 475-479 (January 2005): 3579–82. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3579.

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A simple and facilitate method was reported to synthesize zinc oxide and lead oxide nanorods. Two metal oxides nanorods were directly obtained from grinding solid metallic salts and sodium hydroxide in agate mortar with the assistance of a suitable surfactant in only one step, which is different from the results of hydroxides in solution. The as-prepared products were characterized by XRD, TEM and SEM. An explanation describing possible mechanism for the rod-formation is given.

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