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 .
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.
出处
《环境科学学报》
CAS
CSCD
北大核心
2003年第4期503-507,共5页
Acta Scientiae Circumstantiae
基金
国家自然科学基金 ( 2 0 0 0 70 0 4 )
国家86 3项目 ( 2 0 0 2AA6 4 90 4 0 )
