Academic literature on the topic 'Layed double hydroxides'
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Journal articles on the topic "Layed double hydroxides"
Morioka, Hiroyuki, Hideyuki Tagaya, Masa Karasu, Jun-ichi Kadokawa, and Koji Chiba. "Preparation of hydroxy double salts exchanged by organic compounds." Journal of Materials Research 13, no. 4 (April 1998): 848–51. http://dx.doi.org/10.1557/jmr.1998.0112.
Full textMaviş, Bora, and Mufit Akinc. "Homogeneous Precipitation of Layer Double Hydroxides." Key Engineering Materials 264-268 (May 2004): 41–44. http://dx.doi.org/10.4028/www.scientific.net/kem.264-268.41.
Full textCarneiro, Jorge, Ana F. Caetano, Alena Kuznetsova, Frederico Maia, Andrei N. Salak, João Tedim, Nico Scharnagl, Mikhail L. Zheludkevich, and Mário G. S. Ferreira. "Polyelectrolyte-modified layered double hydroxide nanocontainers as vehicles for combined inhibitors." RSC Advances 5, no. 50 (2015): 39916–29. http://dx.doi.org/10.1039/c5ra03741g.
Full textPachayappan, Latha, Supreeth Nagendran, and P. Vishnu Kamath. "Reappraisal of Polytypism in Layered Double Hydroxides: Consequences of Cation Ordering in the Metal Hydroxide Layer." Crystal Growth & Design 17, no. 5 (March 28, 2017): 2536–43. http://dx.doi.org/10.1021/acs.cgd.7b00071.
Full textGreenwell, H. Christopher, Peter J. Holliman, William Jones, and Beatriz Vaca Velasco. "Studies of the effects of synthetic procedure on base catalysis using hydroxide-intercalated layer double hydroxides." Catalysis Today 114, no. 4 (May 2006): 397–402. http://dx.doi.org/10.1016/j.cattod.2006.02.035.
Full textRichardson, Ian. "Crystal chemistry of layered single and double hydroxides." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C231. http://dx.doi.org/10.1107/s205327331409768x.
Full textGU, 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 (June 12, 2019): 348–55. http://dx.doi.org/10.5755/j01.ms.25.3.21572.
Full textKrivovichev, S. V., V. N. Yakovenchuk, E. S. Zhitova, A. A. Zolotarev, Y. A. Pakhomovsky, and G. Yu Ivanyuk. "Crystal chemistry of natural layered double hydroxides. 2. Quintinite-1M: first evidence of a monoclinic polytype in M2+-M3+ layered double hydroxides." Mineralogical Magazine 74, no. 5 (October 2010): 833–40. http://dx.doi.org/10.1180/minmag.2010.074.5.833.
Full textHines, D. R., S. A. Solin, U. Costantino, and M. Nocchetti. "Layer Rigidity in Layer Double Hydroxides Containing a Fixed Host-Layer." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 341, no. 2 (April 1, 2000): 377–82. http://dx.doi.org/10.1080/10587250008026169.
Full textZhong, Pei, Xinhong Qiu, and Jinyi Chen. "Removal of bisphenol A using Mg-Al-layer double hydroxide and Mg-Al calined layer double hydroxide." Separation Science and Technology 55, no. 3 (February 17, 2019): 501–12. http://dx.doi.org/10.1080/01496395.2019.1577265.
Full textDissertations / Theses on the topic "Layed double hydroxides"
Fogg, Andrew Michael. "Structural, kinetic and synthetic studies of intercalation compounds." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297906.
Full textOgbomo, Sunny Minister D'Souza Nandika Anne. "Processing, structure property relationships in polymer layer double hydroxide multifunctional nanocomposites." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/ark:/67531/metadc12174.
Full textOgbomo, Sunny Minister. "Processing, structure property relationships in polymer layer double hydroxide multifunctional nanocomposites." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12174/.
Full textBlake, Deanne Renee. "Effects of Layer Double Hydroxide Nanoclays on the Toxicity of Copper to Daphnia Magna." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc115048/.
Full textRizvi, Hussain R. "Bioinspired & biocompatible coatings of poly(butylene adipate-co-terephthalate) and layer double hydroxide composites for corrosion resistance." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849647/.
Full textNangoi, Inna Martha. "Estudo teórico da interação de ânions tereftalato na estrutura de compostos tipohidrotalcita modificados." Universidade Federal de Juiz de Fora, 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/499.
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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Cálculos de primeiros princípios baseados na Teoria do Funcional da Densidade (DFT) foram utilizados para investigar propriedades estruturais e eletrônicas de Hidróxidos Duplos Lamelares (HDL) de composição Mg-Al-Tereftalato e Mg-Al-CO3 nas razões molares, x, de 0,25, 0,33 e 0,50. Foi feita uma análise estrutural, baseada na energia total com mapeamento angular do tereftalato (TA) e cálculos de RMN de carbono 13C, que demonstrou a existência de orientações preferenciais na região interlamelar. As diferenças de densidade de carga demonstraram maior transferência de carga das moléculas de água do que do ânion com as lamelas, sendo mais pronunciada em Mg-Al-TA com x = 0,50. O cálculo de ΔG de formação demonstrou que a síntese de Mg-Al-CO3 com x = 0,50 não é espontânea à temperatura ambiente, ao contrário do Mg-Al-TA. Apesar da relação entre as áreas ocupadas pelos ânion e moléculas de água por carga da lamela permitirem a acomodação na estrutura lamelar verificou-se que existe uma competição pelos sítios das lamelas. O resultado da otimização de geometria mostrou a preferência das moléculas de água formarem ligações de hidrogênio com as hidroxilas da lamela, que deslocam o carbonato no Mg-Al-CO3. Este íon passa então a adotar uma posição inclinada em relação à lamela, demonstrado pelos cálculos da energia de formação como sendo desfavorável. Foi simulada a desidratação do Mg-Al-TA e o acordo encontrado para a temperatura de desidratação reportada experimentalmente foi excelente. Foi observada uma modificação mensurável no deslocamento químico do 13C de um dos núcleos de carbono na nova orientação do TA na estrutura desidratada. A influência do cátion divalente nos HDL estudados foi verificada pela substituição do Mg2+ por Zn2+ ou Ni2+. Foram observadas diferenças nos parâmetros geométricos relacionadas à diferenças nos raios iônicos. A análise de carga de acordo com os critérios de Bader indicaram que as cargas dos átomos de oxigênio do TA e das moléculas de água não são alterados de forma significativa pelo tipo da cátion divalentes escolhido.
First principles calculations based on Density Functional Theory (DFT) were used to investigate the structural and electronic properties of Layered Double Hydroxides (LDH) of Mg-Al-terephthalate and Mg-Al-CO3 composition with molar ratios, x, of 0.25, 0.33 and 0.50. The structural analysis was based on total energy angular mapping of terephthalate (TA) and NMR calculations of carbon 13C, which demonstrated the existence of preferred orientations in the interlayer region. The charge density differences demonstrated greater load transfer of water molecules than the anion with the layer being more pronounced in Mg-Al-TA with x = 0.50. The calculated ΔG of formation demonstrated that the synthesis of Mg-Al-CO3 with x = 0.50 is not spontaneous at room temperature, unlike the Mg-Al-TA. Although the ratio between the areas occupied by the anion and water molecules per positive charge area permit the accommodation in the layer structure, it was found that there is a competition for the layer sites. The lower energy geometry optimization showed the preference of the water molecules to form hydrogen bonds with the hydroxyl groups of the layer, displacing the carbonate of Mg-Al-CO3. This ion then will adopt an inclined position regarding to the layer, shown by the Gibbs free energy formation to be unfavorable. The Mg-Al-TA dehydration reaction simulated found an excellent agreement with experimental values. A measurable change in the 13C chemical shift of the carbon nuclei was verified in the new position of the TA in the dehydrated structure. The influence of divalent cation was verified by substitution of Mg2+ by Zn2+ or Ni2+. Differences were observed in geometric parameters related to differences in the ionic radii. Charge analysis based on Bader criteria indicated no significant variation in oxygen atoms of TA and water molecules by the type of divalent cation chosen.
Lee, Wun-Syun, and 李文勛. "Removing boron from wastewater by layer double hydroxides (LDHs) synthesized in situ." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/61719378664841833968.
Full text萬能科技大學
環境工程研究所
104
The possibility of removing boron from wastewater by synthesizing Ca2+ and Al3+ layer double hydroxides (LDHs) in situ was investigated using the method of putting Ca2+ and Al3+ into wastewater. Effects of Ca/Al and Al/B molar ratio, reaction temperature, and reaction time on the removal efficiency of boron were examined. It was found that for the Ca-Al system, the boron can be efficiently removed from synthetic raw water. Moreover, larger Ca/Al and Al/B molar ratio, lower reaction temperature, and longer reaction time could induce higher boron removal efficiency. For the practical glass wastewater, although the removal performance of boron might be affected in the existence of other high charge anions (e.g., ), it still reached 60% under the best operation conditions, implying this method might have a great application potential for the real wastewater systems. However, how to reduce the amounts of high charge anions should be firstly overcome.
Chu, Mei-Chen, and 朱美珍. "Structure and Properties of Poly (ethylene adipate)/Layer Double Hydroxide Nanocomposites." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/55751213888850395518.
Full text國立中興大學
材料科學與工程學系所
103
In this work, the Poly(ethylene adipate) (PEA)/organically modified layered double hydrogen silicates(OLDH) nanocomposites were prepared by solution blending method. The structure and morphology of nanocomposites were investigated using X-ray diffraction and TEM analysis. The results show that OLDH layers were randomly dispersed in the PEA matrix. Dynamic mechanical analysis (DMA) data shows the storage modulus of the 0.5 wt% PEA/OLDH nanpcomposite is 961 MPa, which is 3.4 times higher than pure PEA. The thermal properties of PEA and PEA/OLDH nanocomposites were also observed by TGA instrument. The thermal stability of PEA/OLDH nanocomposites was significantly lower than that of pure PEA matrix. These results are probably due to the presence of Mg and Al metals in PEA/OLDH nanocomposites that cancatalyze the depolymerization or inter- and intra-molecular transesterification reactions of the PEA resulting in their worse thermal stability. Effect of OLDH on the crystallization behavior was investigated using a diffential scanning calorimetry (DSC) and polarized optical microscopy (POM). Isothermal crystallization results of PEA/OLDH nanocomposites show that addition of OLDH into PEA induced heterogeneous nucleation effect, thus increasing the crystallization rate and reducing the surface chain folding energy. Non-isothermal crystallization behaviors of the PEA and PEA/OLDH were also discussed in detail. The biodegradability of PEA and PEA/OLDH nanocomposites have been investigated using the enzymatic degradation method with Pseudomonas fluorescens lipase at pH 7.2 and 37℃. Biodegradable behavior and mechanism of PEA and PEA/OLDH nanocomposites were studied by using the Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Gel Permeation Chromatography (GPC) and weight loss measurement. Effects of OLDH contents on the degradation behavior of PEA were also explored. The weight loss results reveal that the slower degradation rate of nanocomposites by the addition of OLDH as compared to the pristine PEA sample. These results suggest that the OLDH nanofillers play a major role in enzymatic hydrolysis reaction. The degradation of PEA was mainly due to the barrier effect of nanofillers and the lower available surface for enzymatic hydrolysis. The degradation mechanism of PEA due to the enzymatic hydrolysis is a complex process involving different phenomena, the preferential enzymatic degradation of the amorphous regions as compared to crystalline ones. The SEM micrographs of PEA and PEA/OLDH nanocomposites shown the formation of holes is the result of degradation taking place in the polymeric surface.
Wang, Zhao-Yuan, and 王照元. "Removing negative ions from wastewater by layer double hydroxides (LDHs) synthesized in situ." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/31307821973289785520.
Full text萬能科技大學
環境工程研究所
102
The possibility of removing anions from wastewater was investigated by putting cations into wastewater. It was found that this method might have a great application potential for the real wastewater systems. However, how to reduce both the sludge amounts and the chemicals costs should be firstly overcome.
SUN, SIXING, and 孫思行. "CeOx Modified NiFe-Layer Double Hydroxide for Oxygen Evolution Reaction in Alkaline Solution." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/v9692s.
Full text國立臺灣科技大學
化學工程系
107
Nowadays, Electrical vehicle and metal-air battery has blossomed and attracted various of attention among people and these technologies usually require high efficiency on water splitting reaction. Water splitting(H2O→H2+1/2 O2), ideally driven by solar power, is one of the most efficient and sustainable ways to produce molecular hydrogen(H2) and oxygen (O2) gases in high purity. If available, water splitting would have the potential to solve the global urgent energy needs of future societies without any environmental cost. Water oxidation also known as oxygen evolution reaction(OER), one half-reaction of water splitting, has long been the bottleneck due to its four proton-coupled electron-transfer process that requires such a high redox potential. Herein, we report a newly designed OER nanocatalyst, NiFe LDH(Layered Double Hydroxide) based electrochemical catalyst is decorated by CeOx (CeOx/NiFe LDH), to improve its site activity and further the whole catalyst activity. Ni and Fe are earth abundant elements and their product NiFe LDH has been proved as a new benchmark in OER. Meanwhile, having little activity in OER, CeO2, still could be a nice synergistic catalyst and accelerate the dispersion rate of oxygen in OER revealed from some literatures. In this work, we try to combine these two composites and investigate how partial reduced CeO2 affect the activity of NiFe LDH. The 6.28%CeOx /NiFe LDH derived from the hydrothermal method, has an excellent specific activity(1 A/cm2Ni2+/3+) under 0.1M KOH, almost 5 folds higher than pure NiFe LDH. The XPS results show that there is a strong electronic interactions between NiFe LDH and CeOx and it leads to an enhanced OER performance. The stability of this catalyst could also be good for its 94% retention under 1M KOH for 24h. Nevertheless, due to the structural damage in NiFe LDH from the second hydrothermal treatment, mass activity of this catalyst is less satisfying. To further optimize the mass activity, we developed a catalyst, synthesized by the microwave method(6.4%CeOx /NiFe LDH). In this case, both better mass activity(40.3 mA/mgNiFeLDH at 1.54VRHE ) and specific activity(0.33A/cm2) could be achieved. The XAS result reveals that the decoration by CeOx could decrease the coordination number between Ni-O and Ni-M, creating a more loose structure and larger amount of oxygen vacancies. Finally, 6.4%CeOx /NiFe LDH with enhanced activity and long-time stability was successfully prepared.
Book chapters on the topic "Layed double hydroxides"
Barik, Sunita, and Sushanta Kumar Badamali. "Layer Double Hydroxide Reinforced Polymer Bionanocomposites for Packaging Applications." In Bionanocomposites for Packaging Applications, 269–90. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67319-6_14.
Full textHaider, Md Iftikher, Jewel Andrew Gomes, Kevin Urbanczyk, David L. Cocke, Hylton McWhinney, George Irwin, and Paul Bernazzani. "Electrochemical Synthesis of Layer Double Hydroxides, Its Characterization, and Performance Study for Removal of Nitrate and Arsenic." In Supplemental Proceedings, 413–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118356074.ch54.
Full textConference papers on the topic "Layed double hydroxides"
Lesbani, Aldes, Veronika Paruship, Muhammad Fadhil Rizki, Tarmizi Taher, Neza Rahayu Palapa, and Risfidian Mohadi. "Preparation of M2+/M3+ layered double hydroxides (M2+=Zn, Ni, M3+=Fe): Effect of different M2+ to the layer formation." In THE 2ND INTERNATIONAL CONFERENCE ON SCIENCE, MATHEMATICS, ENVIRONMENT, AND EDUCATION. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5139787.
Full textAgonafer, Damena D., Edward Chainani, Muhammed E. Oruc, Ki Sung Lee, and Mark A. Shannon. "Study of Alkane Thiols as a Blocking Mechanism for Specific Adsorption for Application of Charge Selective Membrane Transport." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64678.
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