Papers by Keyword: Layered Compound

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Authors: I. Ruth Mangani, C.W. Park, Y.K. Yoon, S.H. Kim, J. Kim
Abstract: This work reports the effect of doping aluminium in the Li[Li(1/3-x/3)Crx-0.05M0.05Mn(2/3- 2x/3)]O2 (x= 0.2; M= Al), layered cathode material. The cathode material was prepared by citric acid assisted sol-gel process. The sample is characterized by TG/DTA, XRD and FESEM measurements. The Al- doped cathode has delivered an initial discharge capacity of 250 mAh/g with a current density of 0.12 mA/cm2.
Authors: Pasinee Siriprapa, Anucha Watcharapasorn, Sukanda Jiansirisomboon
Abstract: Bi4-xLaxTi3O12 (where x = 0, 0.25, 0.50, 0.75 and 1) powders and ceramics were prepared using conventional solid state reaction and sintering procedures. The calcination was carried out at 750 °C for 4 h and sintering was done at 1150 °C for 4 h. The density of all ceramics was found to be comparable regardless of La concentration. X-ray diffraction analysis showed that preferred orientation of ceramic grains was reduced with addition of La ions. This reduced preferred orientation was accompanied by a decrease in grain size. The temperature dependence of dielectric constant showed a decrease in Tc with increasing La concentration.
Authors: Qing Mei Guan, Zhen Jie Li, Fei Ma, Lin Zhang, Hui Miao
Abstract: Stable Eu3+ doped single-layer rare-earth oxide nanosheets sol were successfully obtained via exfoliation of layer Y(1-X)EuxOBr in n-butanol solvent. After β-diketones modifying, novel inorganic/organic luminescent hybrids were successfully synthesized. At the mean time we discovered that the main charge transfer (Eu-O) excitation bands in nanosheets were replaced by more efficient π-π* electron transition excitation band s of the organic ligands in the hybrids. The emission bands of the 5D0-7F2 electric dipole transition in hybrids were enhanced greatly.
Authors: Yuan Dong Sun, Ling Tang
Abstract: Gelatin has been successfully intercalated into monohydrate zirconium hydrogen phosphate in certain conditions by first inserting aminocaproic acid into its lattice followed by its replacement with gelatin.
Authors: De Liang Chen, Yoshiyuki Sugahara
Abstract: Tungstate-based inorganic−organic hybrid nanobelts/nanotubes were synthesized in a system of H2W2O7·xH2O/n-octylamine/heptane (n-octylamine:H2W2O7·xH2O molar ratio: 30), and the effects of the volume ratios of heptane to n-octylamine and the amounts of interlayer water in H2W2O7·xH2O on the formation behavior of the hybrids were investigated. The belt/tubelike hybrids obtained were 10–20 +m in length and 200–500 nm in apparent diameter. Large volume ratios of heptane to n-octylamine not only enhanced the degree of the long-range order of the lamellar structures in the hybrids, but they also improved the morphologic uniformity of the hybrids. The existence of interlayer water in H2W2O7·xH2O was indispensable to the formation of tungstate-based inorganic−organic hybrid nanobelts/nanotubes. The amounts of interlayer water in H2W2O7·xH2O varied over a wide range (x, from 0.85 to 4.1), had a neglectable effect on the morphology of the tungstate-based nanophase hybrids, but exerted a remarkable influence on the rate of the reaction of H2W2O7·xH2O with n-octylamine in the heptane solvent. The larger the amount of interlayer water, the more rapid the reaction rate.
Authors: Fujio Izumi, S. Kumazawa, T. Ikeda, W.Z. Hu, Atsushi Yamamoto, Kenichi Oikawa
Authors: Dong Hai Zhang, Zi Qiang Li, Yun Fa Chen
Abstract: In this study, α-ZrP-CPC layered compound was gained by inserting cetyl pyridinium chloride (CPC) into α-ZrP with amines as pillaring agent. The amount of CPC intercalated reached the highest with the molar ratio of the amine/α-ZrP being 2. The lower concentration of CPC resulted in more CPC molecules intercalated into the interlayer of α-ZrP. The intercalation products were characterized by XRD, IR, TG-DSC and SEM. The result of TG-DSC showed that the amount of xylene adsorbed reached the peak value of 5.56%, when the content of CPC in α-ZrP-CPC was 41%.
Authors: Lin Zhang, Wei Yang, Yan Yan Zhang, Wang Yan Shi, Dan Yu Jiang, Qiang Li
Abstract: We prepared a series of organic acids pillared layered rare earth compounds Y2-xEux(OH)5X·nH2O (X= Organic acid) by hydrothermal reaction, The distance of layers was determined by X-ray diffraction, and discussed the relationship between the intercalated organic anion and the distance between the layers, In addition, the layered rare earth compound we prepared exhibited good fluorescence properties, being excited by ultraviolet light, the layered compound exhibited characteristic fluorescence spectra of Eu3+ ions. But the fluorescence intensity of the layered compound changed with different intercalated organic anions, by the ratio of the electric dipole transition and magnetic dipole transitions (5D0-7F2)/ (5D0-7F1), we studied the coordination environment of the luminescent center. And discussed the relationship between intercalated organic anions and fluorescence intensity.
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