Hydrothermal Synthesis of Tungsten Oxide Nanowires

Tungsten oxide is a very good catalyst and high temperature superconducting material. It is also used to make electrochromic windows, infrared switches, writing, reading and polishing optical equipment, gas sensitive, humidity sensitive and temperature sensitive components. Meanwhile, tungsten oxide nanowires have excellent field emission properties and can be used as structural precursors for WS₂ nanotubes.

There are many methods to prepare one-dimensional tungsten oxide nanomaterials, such as model method, mesoporous precursor method, organic solution synthesis method, high temperature oxidation method and infrared heating oxidation method. Although there are many preparation methods of one-dimensional tungsten oxide nanomaterials, there are generally some disadvantages, such as complex process and small output. Therefore, it is necessary to further explore new and practical preparation methods, such as simple hydrothermal synthesis, simple operation process, easy access to raw materials, low cost, solvent non-toxic, environmentally friendly, can be synthesized in large quantities of WO₃ nanowires.

Tungsten oxide nanowires are hundreds of nanometers to several micrometers in length and 5-20 nanometers in width. The preparation method is as follows: distilled water is mixed with tungsten powder, stirred fully in autoclave, the reactant reacts at 423-478K for 1-30 days, then filters and dries at 323-373K for 12-24 hours to obtain the tungsten oxide one-dimensional nanomaterials.

WO₃ nanowires can be synthesized by hydrothermal method at lower temperature without adding any surfactant or standard agent. The process is simple, the raw materials are easy to obtain, the cost is low, the solvents are non-toxic, environmentally friendly, and can be synthesized in large quantities. The prepared WO₃ nanowires have excellent properties and wide applications, and are very good. New energy materials can be used in photoelectric catalysis, solar cells, sensors, lithium-ion batteries and field emission. They are suitable for large-scale promotion and have significant economic benefits.

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