Photo catalyst is also called Light catalyst.  Represented by titanium dioxide (TiO2), Under the illumination of light, it does not change itself. But it can promote chemical reactions, A general term for semiconductor materials with catalytic functions.

Under the illumination of the light source, It can utilize the energy of a specific wavelength source to produce a catalytic effect (redox reaction). Exciting the surrounding oxygen and water molecules into active ionic groups such as OH^- and O^2-, These free radicals can almost decompose all organic substances and some inorganic substances that are harmful to the human body or the environment.



Photocatalyst must be exposed to ultraviolet light to function.  If you can't get the sun, If you want to activate photocatalyst, An additional UV lamp must be added.

The choice of UV lamp should be 254nm or 365nm. In the case of weak light sources such as natural light and fluorescent lamps, even in the absence of light, Photocatalyst is not working properly.

However, too much ultraviolet light is harmful to the human body. Photocatalyst technology relies on ultraviolet light to illuminate the titanium oxide ions on the photocatalyst network, causing it to activate and oxidize bacteria that come into contact with its surface.



光觸媒(Photo catalyst)也稱為光催化劑(Light catalyst),是一類以二氧化鈦(TiO2)為代表的,在光的照射下自身不起變化,卻可以促進化學反應,具有催化功能的半導體材料的總稱。在光源照射下,它能夠利用特定波長光源的能量產生催化作用(氧化還原反應),使周圍的氧氣及水分子激發成具活性的OH^-及O^2-等自由離子基,這些自由基幾乎可分解所有對人體或環境有害的有機物質及部分無機物質。






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