【摘要】 考察了 6种常见的无机阴离子对金属掺杂Fe TiO2 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H2 PO-4、HCO-3 具有较强的抑制作用 ,SO2 -4、I-具有一定的抑制作用 ,而NO-3 、Cl-无明显影响 .实验结果证实无机离子对金属掺杂Fe TiO2 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更多还原

【Abstract】 Influences of six common inorganic anions (HCO - 3、H 2PO - 4、SO 2- 4、I -、NO - 3、Cl -)on the photoactivity of Fe TiO 2/SiO 2 have been investigated in the photodegradation of azodye acid red B. The lowest concentrations of different inorganic anions results in the deactivation of Fe TiO 2/SiO 2 photocatalyst were experimented. H 2PO - 4、HCO - 3 are found to inhibit the activity of photocatalyst at all of the concentrations tested, whereas, SO 2- 4、I - have negative influence on the photocatalytic decolorization of acid red B. On the contrary, NO - 3、Cl -have little effect on photoactivity of the catalyst. The modified TiO 2/SiO 2 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.更多还原