Facile synthesis of ZnO/CuInS2 nanorod arrays for photocatalytic pollutants degradation
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Keywords:
Nanorod
Photocurrent
Methyl orange
Tin oxide
Electrophoretic Deposition
Visible spectrum
Chemical bath deposition
Charge carrier
The electrophoretic deposition (EPD) of AlN, Al2O3 and SiC, respectively, from ethanolic suspensions stabilised by suitable organic additives has been investigated. A main topic of this paper is the EPD in the direction of the gravitational force. Using an AlN suspension, the deposit weight depending on the experimental parameters was determined. The deposition was carried out under constant voltage or constant current conditions. Several factors influencing the effective electric field strength will be discussed. It could be shown that the conductivity of the suspension results mainly from the free ionic species. By EPD from the different suspensions, green bodies with monomodal pore size distributions were produced. The electrophoretic deposition of alumina from an ethanolic and from an aqueous suspension of the same composition led to similar results regarding the homogeneity of the particle packing in the deposits. The SiC suspension was also used for infiltrating woven carbon fibre mats by EPD in order to fabricate ceramic matrix composites.
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Hydroxyapatite (HAP) coating is considered to be the best type of biomedical material for replacing hard tissues of human body so far. Electrophoretic deposition is a new technique of preparing coatings, which can solve various disadvantages existed in the traditional technology for preparing HAP bioceramic coatings. This paper provides a comprehensive information on the survey of the electrophoretic deposition of hydroxyapatite bioceramic coating at home and abroad. The process flow and process parameters of the electrophoretic deposition are given . Various factors affecting the hydroxyapatite electrophoretic deposition coating are discussed in detail. Envisagement and prospects in the field are put forward eventually.
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Features of electrophoretic deposition are introduced in this paper. The stability of ceramic suspensions, mechanisms of electrophoretic deposition and kinetic theory were discussed. Numerous applications of electrophoretic deposition were described, including production of coatings on solid substrates, porous ceramic structure, laminated and complex materials, films for solid oxide fuel cells and nanomaterials and nanostructures.
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Generally dye-sensitized solar cell (DSSC) consists of a transparent electrode, TiO2, dye, electrolysis solution and Pt as a counter electrode.In our study, we substituted carbon nanotubes (CNT) for counter electrodes to improve the performance of DSSC owing to their advantages as high catalytic activity, large surface area, and low cost.To coat CNT with Fluorine doped tin oxide(FTO) glass, we adopted Electrophoretic deposition (EPD).It was shown to be a convenient method to fabricate uniform coatings of CNT with desired thickness changing voltage, electrophoresis time and inter electrode distance [1].After EPD, we intered FTO glass coated CNT and we changed sintering temperature of it.As a result of having observed it with atomic force microscopy (AFM), surface area of CNT improved if baking temperature rose.From this result, improvement in the conversion efficiency of DSSC is expectable and sintering temperature after EPD is very important for DSSC.
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Electrophoretic deposition of Al 2 O 3 and ZrO 2 powders from isopropanol suspension in the presence of monochloroacetic acid under constant-current conditions was studied. The deposits were prepared under different electrical conditions of deposition. It was found that the deposits prepared at low current densities (500 µA) contained smaller pores and achieved higher green densities than deposits prepared at high current densities (20 mA). The deposits prepared at low current densities were formed just by part of the particles in the suspension because of decreasing of efficiency of electrophoretic deposition process.
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Herein, titanium (Ti$^{3+}$) self-doped strontium titanate (SrTiO$_{3}$), so-called blue SrTiO$_{3}$, with a bandgap of 2.6 eV and favorable photocatalytic characteristics was fabricated through a facile and effective method. For electrochemical investigations, the electrophoretic deposition was applied to produce SrTiO$_{3}$ thin films on (fluorine-doped tin oxide) FTO conductive substrates. The electrophoretic voltage of 20 V and a process duration of 10 min were optimized to reach transparent and uniform coatings on FTO. The blue SrTiO$_{3}$ reveals lower resistance (charge transfer resistance of 6.38 Ω cm$^{-2}$) and higher electron mobility (current density value of 0.25 mA cm?2) compared to a pure SrTiO$_{3}$ electrode. These findings may provide new insights for developing high-performance visible light photocatalysts.
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