Materials Literature
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Several new heteropoly compounds catalysts with pronounced activities in NOx conversion via adsorption-decomposition process in a fixed-bed reactor were evaluated concerning the principal internal and external factors having marked effects on the process of adsorption. Results showed that substitution of H+ in HPW (H3…
In order to improve and simplify the process of electroless Ni-P plating on AZ91D magnesium alloy substrate, pretreatment process and deposite time were optimized by orthogonal test, the plating morphology were analysed using Quanta 200 type scanning electron microscope. The bond between the plating and aluminum subst…
Luminescence film material plays a very important role in display technology. In this paper, electrochemical deposition of luminescent Y2O3:Eu or Y2O3:Tb thin films on transparent conducting optically ITO glass substrates by cathodes reduction of yttrium nitric was investigated. Y(OH)3 deposits were obtained using a c…
An unsymmetrical photochromic diarylethene, 1-[2-methyl-5-(3,5-difluorophenyl)-3-thienyl]-2-(2-cyano-1,5-dimethyl-4-pyrryl)perfluorocyclopentene (1o), was synthesized, and its optoelectronic properties were also investigated. The results showed that this compound exhibited reversible photochromism changing from colorl…
Abstract A simple procedure for the reductive amination of aldehydes (including formaldehyde) and ketones using NaBH4 is developed.
Rate equation of non-isothermal kinetics of solid decomposition involving the factors of the pressure of gaseous product, the equilibrium pressure, temperature and structure parameters of solid is deduced according to the model of the diffusion of gaseous product. A validity function in the rate equation of non-isothe…
In this paper, we have studied the hot forming process of composites made by polylactic acid (PLA) and corn straw fiber. In order to obtain the composite cushioning material with ideal density and expansion ratio, the parameters of processing was optimized. It showed that the optimum condition as follows: the hot-pres…
Two novel types of metallo-deuteroporphyrins bearing the disulphide bond were employed to investigate their catalytic activity in oxidation of cyclohexane with molecular oxygen (air) to cyclohexanol and cyclohexanone without the use of sacrificial co-reductant. The catalytic activity of metallo-deuteroporphyrin disulph…
Zn-Se/stainless steel thin films were prepared by ultrasonic electrochemical deposition and the application of them was discussed. Firstly, the parameters of the ultrasonic electrochemical deposition were optimized, and the morphology and component of Zn-Se thin films prepared were analyzed by SEM and EDS, it may be s…
The relationship between the wettability and the roughness structure on silicon surface is studied. The unitary microscale square pillar arrays are fabricated by the way of inductively coupled plasma (ICP). The wettability of water droplets on the silicon surface is changed from hydrophilic to hydrophobic only by intr…
O-cationic Chitosan was prepared by self-made cationic ether agent 2,3-epoxypropyl trimethyl ammonium chloride(GTA) and chitosan. In this process, the effects of reaction solvent, reaction temperature, reaction time, amount of KOH and GTA on the substitution of O-cationic chitosan were studiedand the optimal reaction…
Polythionphene (PTH)/polyaniline (PANI)/activated carbon (AC) composites as electrode materials for supercapacitors were synthesized by in-situ polymerization of thionphene on PANI/AC. The surface morphology and the molecular structure of the composites were examined by scanning electron microscopy (SEM) and Fourier t…
Based on TEOS system and sol-gel process, together with catalysts, the microstructure of SiO2 particles in the sol is exactly controlled. The films are characterized by ellipsometer and SEM respectively. The experimental results show that adjusting catalytic agent can effectively effect the structure of SiO2 thin film.
In this paper, the process of Cu-Ag contact wire with adding rare-earth elements was presented. The additive process of the rare-earth elements and the function of the rare earth were chiefly analyzed. Adding the rare-earth elements into melt alloy, the oxide and sulfur can be removed from the liquid, so we can get th…
In situ reaction synthesized TiB reinforced titanium matrix composites were fabricated using rapid non-equilibrium synthesis techniques of laser cladding. Titanium matrix composite were laser cladding treated on Ti-6Al-4V using Ti and B powder mixture, and the designed weight fractions of B were 10 wt.% in the startin…
A novel type of liquid crystalline polyimide with good electroactive properties has been successfully synthesized through polycondensation in the component solvent of benzene sulfonyl chloride, dimethyl formamide and pyridine by N,N’-hexane-1,6-diylbis(trimellitimides), p-hydroxybenzoic acid, 4,4'-dihydroxybenzophenon…
Precipitated silica was prepared by the hydrolysis of silicon tetrachloride in a dilute solution of soluble glass. In order to identify the optimal synthesis conditions of preparing silica powder with the good dispersivity and uniformity, technical parameters such as volumes of polyethylene glycol(PEG) and anhydrous e…
The electronic properties of N-doped orthorhombic SrHfO3 have been calculated using the plane-wave ultrasoft pseudopotential technique based on the first-principles density-functional theory with the local density approximation. From the calculated band structure and density of states, the bandgap reduction is observe…
Pure TiO2, Sm3+ and Gd3+ co-doping TiO2 have been prepared by sol-gel method and characterized by the techniques such as XRD and SEM. The photocatalytic degradation of methylene blue (MB) in aqueous solution was used as a probe reaction to evaluate Pure TiO2, Sm3+ and Gd3+ co-doping TiO2 photocatalytic activity. The m…
The co-doping effect of Be and Mn have been studied in the ferromagnetic semiconductor (Ga,Mn)As thin films. The measurement of magnetic properties shows that the Be doping decreases the Curie temperatures of the ferromagnetic sample due to defects formation. The transport studies show that the Be incorporation decrea…