Tungsten Oxide Nanopowder (WO3, high purity, 99.95%, 23-65 nm)

Technical Specifications:

• Chemical Composition:
  • Primary Ingredient: Tungsten Oxide (WO3)
  • Purity: 99.95% (high purity with minimal impurities)
• Nanoparticle Size:
  • Particle Size Range: 23-65 nm (nanometers)
  • Particle Shape: Typically spherical or irregular depending on the synthesis method.
• Surface Area:
  • The nanopowder has a relatively high surface area, which enhances its reactivity, making it suitable for applications like catalysis, energy storage, and photocatalysis.
• Crystal Structure:
  • Structure: Tungsten oxide typically crystallizes in a monoclinic or tetragonal structure at the nanoparticle scale, depending on processing conditions. The nanopowder’s specific crystal form may influence its catalytic and optical properties.
• Density:
  • The nanopowder has a lower apparent density compared to bulk tungsten oxide due to its fine size and the resulting porosity.
• Other Characteristics:
  • Color: WO3 nanoparticles are usually yellow or greenish-yellow depending on their size, surface modification, and synthesis process.
  • Reactivity: Tungsten oxide nanoparticles exhibit high reactivity due to their large surface area, making them suitable for various catalytic, electrochemical, and optical applications.

Applications:

1. Electrochromic Devices:
   • Purpose: WO3 is a key material in electrochromic devices, which change color in response to an applied voltage.
   • Application: WO3 nanoparticles are widely used in smart windows, mirrors, and displays, where they can change color or opacity based on electrical input. This makes them ideal for energy-efficient windows and automotive or architectural glass that adjusts to light levels for heat and light management.
2. Catalysis:
   • Purpose: WO3 is an effective catalyst for oxidation reactions and is used in various catalytic processes.
   • Application: WO3 nanoparticles are used in environmental catalysts to remove pollutants such as NOx from industrial exhausts. These catalysts are also used in the petroleum industry for refining processes and in the production of fine chemicals.
3. Energy Storage:
   • Purpose: WO3 is increasingly used as an electrode material in energy storage devices due to its high surface area and electrochemical properties.
   • Application: WO3 nanoparticles are employed in lithium-ion batteries, supercapacitors, and other energy storage devices. The nanoparticles enhance the charge capacity and cycle stability of these devices, improving their overall performance and longevity.
4. Photocatalysis:
   • Purpose: WO3 exhibits excellent photocatalytic activity, especially under UV light, making it suitable for environmental cleanup and sustainable energy applications.
   • Application: WO3 is used in photocatalytic processes such as the degradation of organic pollutants, pesticides, and dyes in wastewater treatment. It is also used in the production of hydrogen from water splitting using solar energy.
5. Hydrogen Production (Water Splitting):
   • Purpose: WO3 is studied for its role in photocatalytic water splitting, providing a method for sustainable hydrogen production.
   • Application: WO3 nanoparticles are employed in photocatalytic water splitting systems, where they help generate hydrogen gas from water under UV light. This process is a promising method for clean hydrogen production, a renewable fuel for energy systems.
6. Gas Sensing:
   • Purpose: WO3 is highly sensitive to various gases, making it ideal for use in gas sensors.
   • Application: WO3 nanoparticles are used in sensors for detecting gases like nitrogen dioxide (NO2), carbon monoxide (CO), and volatile organic compounds (VOCs). These sensors are important in environmental monitoring and industrial safety applications.
7. Solar Cells:
   • Purpose: WO3’s ability to absorb UV light makes it a useful material for enhancing the performance of solar energy devices.
   • Application: WO3 is incorporated into solar cells, including dye-sensitized solar cells (DSSCs), to improve their efficiency by facilitating electron transfer and improving the photoanode’s performance.
8. Environmental Remediation:
   • Purpose: WO3’s photocatalytic properties allow it to degrade harmful pollutants, making it useful for environmental cleanup applications.
   • Application: WO3 nanoparticles are used in water and air purification systems to degrade organic pollutants, removing harmful substances like pesticides, industrial chemicals, and toxic waste from the environment.
9. Optical and Photonic Devices:
   • Purpose: WO3 has significant optical properties, making it ideal for use in optical devices.
   • Application: WO3 nanoparticles are used in optical coatings, photodetectors, and other photonic devices. The material’s ability to change its optical properties under external stimuli, like light or voltage, makes it useful in optical switching and imaging devices.
10. Supercapacitors and Capacitors:
    • Purpose: WO3 nanoparticles are being explored for use in supercapacitors and capacitors due to their high surface area and stability.
    • Application: WO3 is used as an electrode material in electrochemical capacitors and supercapacitors to improve the energy density, performance, and cycle stability. It is also employed in energy storage devices that require high charge/discharge efficiency and long-term use.

Key Benefits:

• Electrochromic Properties: WO3’s ability to change color or opacity with electrical input makes it ideal for smart windows and energy-efficient glass technologies.
• High Surface Area: The fine nanoparticle size increases the material’s surface area, enhancing its reactivity and making it suitable for catalytic, energy storage, and photocatalytic applications.
• Versatile Applications: WO3 is used across various industries, including environmental protection, energy storage, and electronic devices, demonstrating its broad potential.
• Photocatalytic Efficiency: WO3 nanoparticles are highly effective in photocatalysis, which is beneficial for applications in pollution control, hydrogen production, and environmental cleanup.
• Environmental Sustainability: WO3 is used in various applications that promote sustainability, such as water splitting for clean energy and pollutant degradation in environmental remediation.
• Stability and Durability: WO3 is chemically stable and durable, making it suitable for long-term use in harsh environmental and industrial conditions.