Ultrafine W18O49 Nanowire Prepared by Solvothermal Method

As a kind of multi-functional material, ultrafine W₁₈O₄₉ nanowire has high application value in many important fields, such as gas-sensing materials, sensors and photodetectors. It is usually prepared by solvothermal method, which is simple and environmentally friendly.

Solvothermal method is developed on the basis of hydrothermal method. Different from hydrothermal method, the solvent used in solvothermal method is organic matter rather than water. Solvothermal method refers to a synthesis process in which one or several precursors are dissolved and reacted in nonaqueous solvent in a closed system (such as an autoclave) at a certain temperature. Under solvothermal conditions, the properties of solvents (density, viscosity, dispersion) interact with each other, and they are quite different from those under normal conditions. At the same time, the chemical reactivity of reactants is greatly improved. Therefore, the reaction can take place at a lower temperature.

Ultrafine W₁₈O₄₉ nanowire can be prepared by solvothermal method, which is as follows:

Step One: 0.4 gWCl₆ is dissolved in 40 ml triethylene glycol. Then the mixture is stirred magnetically for 30 minutes to obtain blue WCl₆ solution.

Step Two: The obtained WCl₆ solution is transferred to the stainless-steel hydrothermal reactor stainless steel hydrothermal reactor with a volume of 50 ml. Then the reactor is sealed. Solvothermal reaction is conducted at 200°C for 5 hours. Then the reactor is cooled naturally.

Step Three: The obtained product in Step Two is centrifuged and then washed repeatedly by deionized water and anhydrous ethanol. It is dried in air at 90°C. And ultrafine W₁₈O₄₉ nanowire with a diameter of 0.6 nm and a length of 160 nm is successfully prepared.

The productivity of ultrafine W₁₈O₄₉ nanowire is large. The prepared W₁₈O₄₉ nanowire can has broad application prospects in many fields such as gas-sensing materials and optical sensors. The whole preparation process is relatively simple. This is a kind of preparation method with high efficiency.

• < Prev
• Next >