光觸媒反應原理

 

 
13光觸媒產品機理
怡居光觸媒作用原理圖
Tio2 納米二氧化鈦特殊的光催化性能
光觸媒[Photocatalyst]是光[Photo=Light]+觸媒(催化劑)[catalyst]的合成詞。光觸媒是一種以納米級二氧化鈦為代表的具有光催化功能的光半導體材料的總稱,是當前國際上治理室內環境污染的最理想材料。
二氧化鈦見光會產生正、負電子,正電子與空氣當中的水分子結合產生氫氧自由基,實踐證明,氫氧自由基具有強大的氧化分解能力,它能分解幾乎所有的有機化合物和一部分的無機物,將它們分解成無害的二氧化碳及水,而負電子與空氣當中的氧結合會產生活性氧,也就是超級氧化離子,超級氧化離子也具有很強的氧化分解能力,它可以破壞細菌、霉菌這些有機物的細胞膜,固化病毒的蛋白質,在殺菌的同時還能分解細菌尸體上釋放出的有害復合物。
有害氣體(甲醛、苯等)→→→→→→→→二氧化碳、水
甲醛:HCHO 苯:C6H6(HCHO )+OH-→CO2+H2O相當于正常的光合作用產物
 

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