A polyurethane resin catalyst with the cross-linking silver (Ag) ion is successfully synthesized in this study, and its use as a catalyst in electroless copper deposition is also analyzed. FT-IR, SEM, EDX and electrochemical open circuit potential-time (OCP-t) technique are used to analyze the structure of the catalyst, the process of catalyzing copper deposition and induced rate of the electroless copper deposition. We also demonstrate that the polyurethane resin catalyst containing silver ion can be screen printed onto the PET substrate, then, a Cu pattern is successfully fabricated on the PET after electroless copper plating.
In this paper, nano TiO2 loaded on activated carbon fiber(ACF) was prepared by hydrothermal method as TiO2/ACF photocatalytic.The material crystal structure, the superficial appearance of catalyst, were analyzed and measured by XRD and SEM images.Moreover, it used for photocatalytic oxidation As(Ⅲ).The effect of pH on the oxidation of As(Ⅲ) was studied. The oxidation of As(Ⅲ) efficiency increasing markedly with pH, and the catalytic efficiency is much higher in the alkaline environment than in the acidic environment.
As a simple and useful approach, vapor-phase photografting acrylic acid was used to modify the surface of PET films. Catalyst of silver nanoparticles was distributed on the photografting PET films equably after reducing by ascorbic acid. Topography of the pristine, grafting and metallized PET films was characterized by scanning electron microscope (SEM). XRD and FTIR-ATR were also used to analyze the electroless plating copper layer and the grafting PET film respectively.
In this paper, TiO2crystallines doped with transition metal ions have been prepared by sol-gel method. The UV-visible spectra indicated that the doping with transition metal ions (especially Cu2+, Mn2+and Cr3+ions) could effectively improve the absorption of TiO2crystals in the visible-light range. The XRD results showed that the doping does not affect the anatase phase of TiO2. The band structure and the UV-vis absorption spectrum of Mn2+ions doped-TiO2were also calculated by DFT (density function theory) method, which indicated that the doping with transition metal ion could make the band gap of TiO2smaller and a red shift in optical absorption.
Al–Sn co-doped ZnO thin films were fabricated onto quartz glass substrates by the sol-gel method. The surface morphology, electrical and optical properties at different post-deposition heating temperatures were investigated. The grains of preferred c-axis showed a well-mixed microstructure and the peak height was enhanced with the post-deposition heating temperature increasing from 400°C to 600°C. Doped films showed a preferential orientation along the (002) plane, while the preferential orientation changed to the (101) plane when temperature was higher than 500°C. The lowest resistivity 6×10–3Ω•cm was observed from samples made at 500°C, with an average 91.2% optical transmittance in the visible range. In this study, optical band gap of all the doped films were broadened, regardless of post–deposition heating temperature.
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