01679nas a2200217   4500008004100000022001400041245011400055210006900169260010000238300001200338490000600350520084700356653000901203653003001212653002001242653002301262100001401285700001301299700001801312856013101330       2007                        eng d  a1788-618X00aPhoto-oxidation of EPDM/layered double hydroxides composites: influence of layered hydroxides and stabilizers0 aPhotooxidation of EPDMlayered double hydroxides composites influ  aDEPT POLYMER ENG, MUEGYETEM RKP 3, BUDAPEST, H-1111, HUNGARYbBUDAPEST UNIV TECHNOL & ECONcNOV  a748-7540 v13 a<p>The photo-oxidation of ethylene propylene diene monomer (EPDM)/layered double hydroxide (LDH) composites as well as EPDM/LDH with stabilizers is studied under accelerated UV irradiation (lambda &gt;= 290 nm) at 60 degrees C for different time intervals. The development of functional groups during oxidation was monitored by FT-IR spectroscopy. The photo-degradation of the pristine polymer and composites take place and the increase in hydroxyl and carbonyl groups with irradiation times, was estimated. EPDM filled LDH showed higher degradation rate than pristine EPDM, while in acidic medium EPDM/LDH showed almost equal degradation as in isolated conditions. These results show the advantages of LDHs as a filler as well as an acid killer. The effect of stabilizers is very less because of their concentration in comparison of LDH.</p>10aEPDM10alayered double hydroxides10aPhoto-oxidation10apolymer composites1 aKumar, B.1 aRana, S.1 aSingh, R., P.  uhttps://library.ncl.res.in/content/photo-oxidation-epdmlayered-double-hydroxides-composites-influence-layered-hydroxides-and-002268nas a2200241   4500008004100000022001400041245007800055210006900133260008600202300001200288490000800300520141800308653002101726653001601747653003001763653001801793653002201811100001901833700002001852700002301872700001901895856011201914       2009                        eng d  a0044-296800aStructural characterization of azoic dye hosted layered double hydroxides0 aStructural characterization of azoic dye hosted layered double h  aLEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANYbOLDENBOURG VERLAGcJAN  a282-2860 v2243 a<p>The removal of methyl orange (MO) from an aqueous solution was performed using layered double hydroxides (LDHs) in a move to develop cleaning processes of effluents contaminated with dye molecules. The intercalation of the guest anionic MO species into host M(II)/Al(III) LDHs differing by the nature of the divalent cations (M(II) = Mg, Ni or Zn) was achieved by anionic exchange of the initially NO(3)(-) present in the interlayer space and led to MO/LDH intercalation compounds. The exchange process was followed by XRD and UV-visible absorption spectroscopy at different stages. Almost all MO in solution is uptaken by the Mg-containing LDH in the concentration range corresponding to its anionic exchange capacity (AEC). A lower exchange is reached with the Ni- and Zn-containing LDHs, for which the diffusion of MO is limited due to a larger crystallite size. MO-Zn/Al LDH intercalation compounds exhibit the highest crystallinity and display a remarkable stacking of the layers at maximal MO exchange. This behaviour can be assigned to the higher intrinsic charge density of the host layers in agreement with its lower M(II)/Al(III) molar ratio (Zn(II)/Al(III) approximate to 1.5 whereas Mg(II)/Al(III) and Ni(II)/Al(III) = 2). The maximum amount of MO retained by the different LDHs is higher for Mg-containing LDH, than for Ni- and Zn-containing LDH, reaching respectively 1.15, 0.84 and 0.77 g/g.</p>10aAnionic exchange10aDepollution10alayered double hydroxides10aMethyl orange10aX-ray diffraction1 aMandal, Sujata1 aLerner, Dan, A.1 aMarcotte, Nathalie1 aTichit, Didier  uhttps://library.ncl.res.in/content/structural-characterization-azoic-dye-hosted-layered-double-hydroxides-002253nas a2200217   4500008004100000022001400041245014200055210006900197260006800266300001400334490000800348520139100356653003201747653002401779653001301803653002601816653003001842100001701872700002001889856012601909       2010                        eng d  a0021-899500aPreparation and characterization of novel hybrid of bio-assisted mineralized Zn-Al layered double hydroxides using chitosan as a template0 aPreparation and characterization of novel hybrid of bioassisted   a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAR  a3636-36440 v1153 a<p>The purpose of this study was to prepare and characterize a novel nanohybrid prepared from the template-assisted mineralization of Zn-Al Layered Double Hydroxide (LDH) onto the surface of Chitosan (CSI), with an emphasis on morphology, biocompatibitity, and its use as an efficient drug carrier agent. The as prepared LDH is highly crystalline, with platelet-like morphology and curved tactoids when nucleated onto the surface of CSI. Our results indicate that the -OH and -NH functional moieties on CSI can direct an ordered structure of LDH, due to the electrostatic interaction between biopolymer and inorganic lamellae. We have been successful to intercalate an anti-inflammatory drug, Sodium Ibuprofen (Ibu), into LDH, through conventional coprecipitation method. LDHs are endowed with great potential for delivery vector because their stacked layers lead to safe reservation of biofunctional molecules or genes, and their ion exchangeability and solubility in acidic media (pH &lt; 4) give rise to the controlled release of drug molecules. According to the cell-growth studies, LDHs are found as cell viable up to the concentration of 500 mu g/mL. This study reveals that LDH not only plays a role of a biocompatible-delivery matrix but also facilitates a significant increase in the delivery efficiency. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115:3636-3644,2010</p>10abio-assisted mineralization10acell-growth studies10aChitosan10adrug delivery systems10alayered double hydroxides1 aDepan, Dilip1 aSingh, Raj, Pal  uhttps://library.ncl.res.in/content/preparation-and-characterization-novel-hybrid-bio-assisted-mineralized-zn-al-layered-002507nas a2200265   4500008004100000022001400041245010100055210006900156260007600225300001400301490000700315520155300322653002201875653003001897653001901927653001801946653001301964653003201977100002202009700002202031700002002053700002402073700002002097856012402117       2011                        eng d  a0959-810300aInfluence of reactive compatibilization on the structure and properties of PP/LDH nanocomposites0 aInfluence of reactive compatibilization on the structure and pro  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcDEC  a1688-16960 v603 a<p>Polypropylene (PP)/layered double hydroxide (LDH) nanocomposites were prepared by the direct melt intercalation method usingmaleic anhydride grafted polypropylene (PP-g-MAH) as a reactive compatibilizer. The compatibilization effects provided by PP-g-MAH in different weight fractions and their influence on the structure and properties of the final nanocomposites were investigated. The interactions and structural morphology of the nanocomposites were examined by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electronmicroscopy. Thermal, mechanical and rheological properties of these nanocomposites were investigated as a function of compatibilizer concentration. The detailed morphological and X-ray diffraction results revealed that the degree of LDH dispersion increases as the amount of PP-g-MAH increases. Study of the linear viscoelastic properties showed that the storage modulus G' is very sensitive to the microstructure of the nanocomposite. The thermal properties of the nanocomposites were significantly influenced by the weight fraction of PP-g-MAH due to the shielding and nucleating effect of exfoliated layers. Both the tensile strength and modulus showed substantial improvements with increasing PP-g-MAH content, while the elongation at break substantially decreased, although the presence of PP-gMAH somewhat improves these values. The overall results showed that 10 wt% of compatibilizer is optimum to achieve nanocomposites with better performance. (C) 2011 Society of Chemical Industry</p>10acompatibilization10alayered double hydroxides10aNanocomposites10apolypropylene10aRheology10athermomechanical properties1 aLonkar, Sunil, P.1 aTherias, Sandrine1 aLeroux, Fabrice1 aGardette, Jean, Luc1 aSingh, Raj, Pal  uhttps://library.ncl.res.in/content/influence-reactive-compatibilization-structure-and-properties-ppldh-nanocomposites-002194nas a2200241   4500008004100000022001400041245016800055210006900223260000800292300001400300490000600314520127100320653002201591653002401613653002601637653003201663653003001695100002001725700003001745700002701775700002401802856012601826       2020                        eng d  a2196-021600aCo@CoAl-layered double hydroxide/nitrogen-doped graphene composite catalyst for Al-H2O-based batteries: simultaneous hydrogen production and electricity generation0 aCoCoAllayered double hydroxidenitrogendoped graphene composite c  cJUN  a2582-25910 v73 a<p>Currently, the low energy efficiency of water electrolysis has compelled research toward the development of novel and energy-effective strategies for low-cost H-2 generation. In this context, we report a new concept of simultaneous H-2 and electricity generation by separating out the exothermic self-sustained Al-H2O reaction via electrochemistry. In addition, to catalyze the cathodic water reduction reaction, a single-pot and environmentally benign synthesis method is adopted. It results in the design of an electrocatalyst composed of Co@CoAl-layered double hydroxide core-shell nanospheres anchored over in situ generated N-doped graphene. Toward the water reduction reaction, the designed catalyst shows a negative voltage shift of mere around 113 mV with respect to the commercial Pt/C catalyst to reach the benchmark 10 mA cm(-2), with excellent stability of approximately 86 % voltage retention after 12 h of continuous operation. The catalytic superiority of our material is evident when taken for battery-level testing; the fabricated device was able to deliver an average output voltage of around 0.95 V at a discharge current density of 5 mA cm(-2) along with H-2 liberation, which was also detected and quantified through gas chromatography.</p>
10aAl-H2O fuel cells10achronopotentiometry10acore-shell structures10ahydrogen evolution reaction10alayered double hydroxides1 aNadeema, Ayasha1 aKharabe, Geeta, Pandurang1 aBiswal, Dibya, Prakash1 aKurungot, Sreekumar  uhttps://library.ncl.res.in/content/cocoal-layered-double-hydroxidenitrogen-doped-graphene-composite-catalyst-al-h2o-based02914nas a2200265   4500008004100000022001400041245014500055210006900200260000800269300001200277490000700289520193600296653002302232653001402255653003102269653003002300653004002330653002902370100002502399700002202424700002502446700002102471700002402492856013202516       2024                        eng d  a1380-222400aInvestigation of structural and morphological insights of nanostructured layered double hydroxides: catalytic activity in aldol condensation0 aInvestigation of structural and morphological insights of nanost  cAPR  a759-7780 v313 a<p>
	Layered double hydroxides (LDHs) materials finds extensive applications in numerous fields such as medical science, industrial sector, agriculture and food, catalysis, polymers, nanotechnology, etc. The LDHs properties (structural, textural, morphological, spectroscopic and theoretical insights) can be design for achieving required materials for particular application in scientific areas. In the current investigation, we have synthesized mesoporous nanostructured LDHs materials via microwave, sonication and stirring method. The nanostructured LDHs was scientifically characterized by various physico-chemical techniques like XRD, N2 sorption, TGA, solid state one-dimensional 27Al magic angle spinning NMR spectroscopy, XPS, Raman Spectroscopy, FT-IR, ICP-OES, Electron Microscopy (SEM, FE-SEM, TEM and HR-TEM), EDX, elemental analysis, etc. On the basis of experimental study, it can be evidently witnessed that nanostructured LDHs materials was formed with good crystalline mesoporous nature. Solid state 27Al NMR showed single and sharp 27Al NMR signal at chemical shift value of + 1.4 ppm, strongly suggesting the presence of octahedral (Oh) AlO6 coordination site in all as-synthesized LDHs. Microwave and sonication techniques furnishes regularly dispersed well-developed flower-shaped nanocrystals however, stirring method gives mostly agglomerated nano-sized platelets. The mechanistic insights for the fabrication of nanostructures LDHs via microwave, sonication and stirring process were also highlighted. The different LDHs materials were utilized in the aldol condensation reaction of furfural with acetone for understanding structure-activity correlation. Microwave and sonication methodologies can be further exploited for the synthesis of many other inorganic-organic nanocomposites materials with stable and good dispersion of nanocrystals in addition to desired morphology and catalytic activity.</p>
10aAldol condensation10acatalysis10aFlower-shaped nanocrystals10alayered double hydroxides10aMicrowave and sonication techniques10aNanostructured materials1 aBhagat, Shailesh, K.1 aNagpure, Atul, S.1 aLanjewar, Mamata, R.1 aGode, Nilesh, G.1 aThakare, Sanjay, R.  uhttps://library.ncl.res.in/content/investigation-structural-and-morphological-insights-nanostructured-layered-double-hydroxides