Papers by Keyword: Intercalation Compound

Abstract: The intercalation of ethylenediamine (en) into SnS₂ was synthesised by hydrothermal reaction at the temperature of 180 °C.And then dispersed the intercalation compounds in N, N-dimethylformamide (DMF) by stirring 48h,getting a light yellow sol ,with the nature of uniform ,transparent and stable.Analysised the structural of the product by means of X-ray powder diffraction (XRD) .The morphology of sol was characterized by using of transmission electron microscopy (TEM).The UV-Vis spectrophotometer was utilized for the absorbance of the colloidal.The results show that en has been successfully inserted into the layer of tin disulphide,and the target products is of high purity and good crystal.The sol is of high stability and homogeneity, and have the strongest absorption at the Wavelength of 270nm.

Abstract: Latent heat energy storage is becoming more and more attractive for energy conservation of buildings. Phase change materials (PCMs) can be applied in building envelopes to conserve heat energy in building products. The technology of PCMs is efficient and economical due to the rising cost of fossil fuels and environmental concerns. In this paper, binary organic/inorganic nano-composite PCM by intercalation compound is prepared, preparation conditions are studied systematically; and structural analysis and characterization of performance are conducted. The results obtained show that a good potential for heating and cooling is in building through nano-composite PCM and overcomes weaknesses and deficiencies of pure PCMs. A simple modification of binary organic/inorganic nano-composite PCM is discussed firstly. Secondly, the various influencing factors of thermal storage capacity are discussed. The optimum experimental conditions for preparation of organic/inorganic nano-composite PCM are, 55%~60% for the content of organic substances, 5h for the preparation time, 70~80°C for the preparation tem. and 60~120 mesh for the best granularity of composite PCM.

Abstract: This work deals with a new class of vanadium pentoxide nanocomposites containing supramolecular iron or manganese tetrapyridyl porphyrins coordinated to four [Ru(bipy)2Cl]+ complexes. Their characterization was carried out by means of X-ray diffraction, SEM, AFM, confocal Raman microscopy, electronic spectroscopy and electrochemistry. According to X-ray diffraction, the original VXG lamellar framework was maintained in the nanocomposite material, but the interlamellar distance increased from 11.6 Å to 18.5 Å, reflecting the intercalation of the porphyrin species into the inorganic matrix. The films generated by direct deposition of the nanocomposite aqueous suspensions onto interdigitated gold electrodes exhibited good electrical and electrochemical performance for application in amperometric sensors.

Abstract: Ultrahigh-resolution photoemission spectroscopy of 1T-Fe0.5TiSe2 was performed in order to study the changes in the density of states across the superconducting transition. We observed the gap about 2 meV in spectrum measured at 4.5 K.

Abstract: Kaolinite-glucose intercalation compound was synthesized by the intercalation of polar organic big molecule dodecylamine and then displaced by glucose in the layer of kaolinite. XRD, FT-IR, TG and DSC were used to study the reaction process and the characters of the products. The results indicated that the basal spacing of kaolinite increased to 2.280 nm from 0.717 nm, and the hydrogen bonds were formed between dodecylamine NH and kaolinite Si-O after dodecylamine intercalation. Kaolinite-dodecylamine intercalation compound was stable below 295 °C. After displacement reaction by glucose, the basal spacing of kaolinite increased to 3.364 nm, and the intercalation rate reached 87%, the hydrogen bonds were formed between glucose C=O and kaolinite inner surface hydroxyl. Kaolinite-glucose intercalation compound was stable below 302 °C.

Abstract: The kaolinite-polyacrylamide intercalation compound was prepared by the displacement reaction of the kaolinite-formamide intercalation precursor with acrylamide and the polymerization under 140°C for 15h with the catalysis of dibenzoyl peroxide. Sialon was synthesized from kaolinite-polyacrylamide intercalation compound by carbothermal reduction and nitridation (CRN) processing at 1400°C. The kaolinite-carbon mixture and its CRN product were also prepared for the comparison with the CRN result of intercalation compound. XRD, FT-IR, and TEM were used to characterize the phases, structure and morphology of products. In the CRN product from the intercalation compound, β′-sialon is the main phase. And the reduction and nitridation rate from the intercalation compound was greater than that from the mixture. There was higher sialon phase’s content and lower mullite phase’s content in the CRN product from the intercalation compound than that from the mixture. The CRN processing of kaolinite intercalation compound is a novel and effective method of sialon synthesis.