Ammonium Paratungstate Preparing Nanometer Tungsten Disulfide Powder

Metal sulfides can be generated by sulfur and metal, also can be generated from hydrogen sulfide (or hydrogen sulfate) reacting with metal oxide or hydroxide; it is a very important semiconductor material. With sulfide semiconductor playing an increasingly important role in  people's lives and production, metal sulfides nanometer materials are cause strong research interests of scientists because of their broad play application in photocatalytic material, luminescent materials, nonlinear optical materials and light-sensitive sensor material. Tungsten disulfide, as a sulfide with unique properties, causes particular concern because when the temperature exceeds the critical value, the magnetic and conductive properties would be changed. It is widely used in solar cells, catalytic hydrodesulfurization reaction, as well as a photoconductive material and lithium - sulfur battery cathode materials and other aspects.



Ammonium paratungstate can be used as raw materials to prepare tungsten disulfide nano-powder with aluminum sulfide shell.
1. Using the traditional process to reduce ammonium paratungstate to high purity tungsten powder;
2. Tungsten and aluminum blocks pressed under the pressure of IMpa~IGpa from powder as the anode material of the plasma arc furnace, wherein the tungsten atomic share the percentage of 95~99%;
3. Using graphite electrodes as the cathode, tungsten and aluminum blocks as the anode;
4. Preparing nanometer tungsten disulfide powder by Arc Discharge Plasma Technology
Holding the distance of cathode (graphite) and anode (tungsten and aluminum blocks) between 2~30mm, carrying out the reaction under the protection of argon and hydrogen sulfide gas, and the arc discharge voltage 10~40V, then tungsten disulfide nano-powder with aluminum sulfide shell generated.
Remarks: the partial pressure of argon and hydrogen sulfide gas is respected to 0.01~0.5Mpa and 0.01~0.3MPa.

• < Prev
• Next >