• 关键词：无机离子  光催化剂  金属掺杂  Fe-TiO₂/SiO₂

• 基金项目：国家自然科学基金(20007004);国家863项目(2002AA649040)

• 唐玉朝
• 1. 中国科学院生态环境研究中心,北京 100085; 2. 安徽建筑工程学院环境工程系,北京 100085

• 胡春
• 中国科学院生态环境研究中心,北京 100085

• 王怡中
• 中国科学院生态环境研究中心,北京 100085

• 摘要：考察了6种常见的无机阴离子对金属掺杂FeTiO₂/SiO₂复合光催化剂光催化降解酸性红B反应的影响,考察了导致催化剂失活的无机阴离子的最低浓度.结果发现H₂PO₄^-、HCO₃^-具有较强的抑制作用,SO₄^2-、I-具有一定的抑制作用,而NO₃^-、Cl-无明显影响.实验结果证实无机离子对金属掺杂FeTiO₂/SiO₂活性的影响比TiO₂/SiO₂催化剂的影响明显要弱.对催化剂失活的机制也作了探讨.

• Abstract：Influences of six common inorganic anions (HCO₃^-、H₂PO₄^-、SO₄^2-、I-、NO₃^-、Cl-)on the photoactivity of Fe TiO₂/SiO₂ have been investigated in the photodegradation of azodye acid red B. The lowest concentrations of different inorganic anions results in the deactivation of Fe TiO₂/SiO₂ photocatalyst were experimented. H₂PO₄^-、HCO₃^- are found to inhibit the activity of photocatalyst at all of the concentrations tested, whereas, SO₄^2-、I-have negative influence on the photocatalytic decolorization of acid red B. On the contrary, NO₃^-、Cl-have little effect on photoactivity of the catalyst. The modified TiO₂/SiO₂ with iron inhibited the negative role of the tested inorganic anions on the photocatalysis. The mechanisms of the deactivation of the catalysts were also discussed.

• Key words：photocatalysis  inorganic anions  Fe TiO₂/SiO₂  catalyst deactivation  dyes

• 
  摘要点击次数： 1718 全文下载次数： 2700