Tungsten trioxide (WO3) powder has been used to produce filaments and tungsten carbide. As more characteristics are discovered, WO3 powder has been widely used in electrochromic displays, semiconductor gas sensors, photocatalysts and other devices due to its excellent electrochromic, gastrochromic, thermochromic and photochromic properties. WO3 powders with nanostructures are believed to have the enhanced properties because of their larger surface area and unique physical properties.

Tungsten trioxide (WO3) is an N-type semiconductor material that has been widely studied for use in sensors, electrochromism, photocatalysts, and energy storage devices. A simple and low-cost microwave-assisted method have been adopted to prepare the composite.

Gas sensing at room temperature has attracted a lot of research interest, especially the combination of MOX, CNT and graphene, but it usually has the problems of slow response time, poor baseline stability, and high humidity dependence.

High-performance gas sensors are receiving more and more attention due to their wide application in pollutant detection, medical diagnosis, chemical monitoring, food processing and other fields. Tungsten oxide (WOx) has received considerable attention as a promising sensing material due to its high sensitivity and stability, specifically towards hydrogen sulfide (H2S) gas. Various WO3 nanostructures such as nanoparticles, nanowhisker, nanorods, and nanowires have shown enhanced sensing properties towards different gases.

Cemented carbide or tungsten carbide (W2C) is widely used in cutting tools, drilling tools and wear-resistant tools due to its excellent tensile strength, fracture toughness, thermal shock resistance and hardness. By reducing the grain size of WC or adding appropriate reinforcing materials, the mechanical properties of cemented carbide can be greatly improved. The grain size of WC can be suppressed by adding a grain inhibitor or using low-temperature rapid sintering.

Ammonium paratungstate (APT) is a known intermediate to produce metallic tungsten, tungsten-containing catalysts, or tungsten-based hard materials (such as tungsten carbide) or sputtering targets. The latter application requires particularly high purity APT. There are two major source of tungsten which include tungsten ores and recycle of tungsten scraps.

Photocatalytic degradation is considered as a promising technology for complete wastewater decontamination because of its organic and synthetic dormancy, essential limit, cost-viability, and long haul security against chemical corrosion. Photocatalytic degradation on dyes such as rhodamine B (RhB) has gained a lot attention.

In the past few decades, electrochromic devices have received great attention from researchers in related fields in the materials industry. Tungsten trioxide (WO3) is one of the most common electrochromic films that, utilized as electrodes for smart window applications, aiming at reducing the energy consumption in buildings.

Electrochromic smart devices with controllable optical properties are the most promising alternatives to traditional doors and windows. The existing technology preparation and commercialization of large-scale electrochromic films are mainly based on vapor deposition, but large-scale applications are limited by high prices (due to the complex preparation process).

Electrochemical supercapacitors have become prominent energy storage devices due to their excellent capacitance behavior, unparalleled power and energy density, and excellent cycle stability.Tungsten trioxide (WO3) has the advantages of various shapes, high theoretical specific capacitance, environmental friendliness, and low cost. It is a promising electrode material. However, its low conductivity (10-5-10-6 S cm-1) limits its wide application. Doping or dispersing WO3 with highly conductive carbon materials is a solution to overcome these shortcomings.