Improving the charge properties of WO3 photoanode by a BiFeO3 ferroelectric nanolayer

Tungstic oxide (WO3) is a promising visible-light-responsive photoanode material while suffers from poor charge transport and collection properties. Here, a WO3/BiFeO3 core/shell photoanode (WO3/BFO) with enhanced photoelectrochemical (PEC) performance was...

I-V characteristics and the synthesis of ZnS nanoparticles by glow discharge at the metal–ionic liquid interface

A plasma chamber was constructed for the synthesis of ZnS nanoparticles in ionic liquid by glow discharge electrolysis method. Current and voltage (I-V) characteristics of the discharge at the metal–ionic liquid interface showed that the curve follows Ohm's law up to a particular voltage only so that the ZnS nanoparticle preparation was performed after the critical voltage. X-ray diffraction and energy dispersive spectral analysis showed that the samples contain ZnS nanoparticles and also found that tungsten from the metal electrode dissolved in the BMIM[BF4] ionic liquid under plasma and formed tungstic oxide by accepting atmospheric oxygen.

Submicron Tungsten Powder Prepared through the Circulatory Oxidization-Reduction Method

Tungstic oxide is prepared with pure ammonium paratungstate in the air. And then Tungsten powder is obtained with tungstic oxide through deoxidation in the hydrogen gas (Rate of purity: 99.99 %, dew point: -40 °C), and tungsten powder is oxidized in the air. Tungstic oxide is reduced into tungsten powder in the hydrogen gas. The above routes are repeated. The samples are characterized by the laser particle size distribution measuring instrument and the electron probe scan instrument. The results show that submicron tungsten powder is obtained through circulatory oxidation twice and reductiuon three times. The volume percentage of the particle size distribution of submicron tungsten powder between 0.1 μm and 0.5 μm is 94.81 %.