Vanadium Dioxide Nanoparticles (VO₂)

Product Overview

Vanadium Dioxide (VO₂) is a metal oxide with unique phase transition characteristics, belonging to the monoclinic crystal system. VO₂ appears as a deep blue crystalline powder. It exhibits polymorphic structures including VO₂(M), VO₂(R), VO₂(A), VO₂(B), and VO₂(C), and undergoes a reversible transition from an insulating phase to a metallic phase at a specific temperature. This phase transition is accompanied by significant changes in electrical conductivity and optical properties. VO₂ also exhibits high catalytic activity and chemical inertness, making it widely applicable in smart windows, optoelectronic switches, sensors, and catalysts.

Key Features

• Phase Transition Characteristics: VO₂ can undergo a reversible transition from an insulating phase to a metallic phase at 68°C, with significant changes in conductivity and optical properties.
• High Surface Area: The nanometer-sized VO₂ particles possess a large surface area, enhancing surface reactivity and catalytic efficiency.
• Chemical Inertness: Despite a high number of active sites on the surface, VO₂ demonstrates strong chemical inertness, making it excellent for adsorbing harmful gases.
• Good Stability: VO₂ nanoparticles exhibit good stability, maintaining performance in a variety of environmental conditions.
• High Catalytic Activity: The high surface area of VO₂ nanoparticles results in significant catalytic activity, making them ideal for various catalytic reactions.

Applications

• Smart Windows: Based on VO₂’s phase transition properties, it can be used to manufacture smart windows that automatically adjust transparency and thermal conductivity, improving energy efficiency.
• Optoelectronic Switches: VO₂ is used in high-speed optoelectronic switches, which are widely applied in information processing and data storage systems.
• Sensors: The significant changes in electrical and optical properties during the phase transition make VO₂ ideal for sensing physical parameters such as temperature, humidity, and pressure, as well as for optical sensing and spectral analysis.
• Catalysts: VO₂ serves as a catalyst in various reactions, including nitration, ethane dehydrogenation, methane oxidation, and hydrogenation of formic acid, among others.