Tungsten trioxide (WO3) has excellent photocatalytic properties, which makes it widely used in environmental protection and energy fields. The following are some key aspects about the photocatalytic properties of tungsten trioxide:
Tungsten Trioxide Light Absorption Capacity
Tungsten trioxide has good absorption ability to visible light and near ultraviolet light. It is able to absorb the energy of incident light and excite internal electrons, thereby providing energy for catalytic reactions.
Tungsten Trioxide Reactive Oxygen Species Generation
When tungsten trioxide is illuminated, it can generate reactive oxygen species such as hydroxyl radicals (•OH) and superoxide ions (O2•-) through the formation of photogenerated electron-hole pairs. These reactive oxygen species have strong oxidative properties and are able to oxidize and degrade organic pollutants.
Band Structure Of Tungsten Trioxide
The band structure of tungsten trioxide enables the generation and separation of photogenerated electron-hole pairs. Electrons excited by light are excited to the conduction band, while holes remain in the valence band. This phenomenon of electron-hole separation provides an efficient charge transfer pathway for photocatalytic reactions.
Tungsten Trioxide Photocatalytic Reaction
Tungsten trioxide photocatalysts can be applied to many environmental and energy-related reactions, such as water splitting, degradation of organic pollutants, air purification, and electrochemical energy conversion, etc. It can stimulate the reaction with the energy provided by light and accelerate the reaction kinetics.
Tungsten Trioxide Visible Light Response
Some special forms of tungsten trioxide, such as doping, surface modification or nanostructure, can broaden its light absorption range to the visible region. This enhances the visible-light photocatalytic performance of tungsten trioxide, making it more potential for application. The photocatalytic properties of tungsten trioxide are affected by many factors, including crystal structure, surface morphology, doping, light intensity and reaction environment, etc. Optimizing these factors can further improve the photocatalytic efficiency and stability of tungsten trioxide to meet specific application requirements.
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