无机阴离子对TiO2/SiO2光催化降解酸性红B活性的影响

以酸性红B为模型化合物，分别考察了6种常见的无机阴离子对TiO2/SiO2复合光催化剂活性的影响，并考察了导致催化剂失活的无机阴离子的最低浓度。结果表明，除了HCO3^-能引起催化剂部分不可逆中毒外，其余5种离子并没有在催化剂形成占位。失活的催化剂通过简的HCl冲洗即可再生。另外，对催化剂的失活机制作了初步探讨。

EFFECT OF INORGANIC ANIONS IN PHOTOCATALYTIC DEGRADATION OF DYE ACID-RED B

Influences of six common inorganic anions on the photoactivity of TiO 2/SiO 2 have been investgated in the photodegradation of dye acid-red B.The lowest concentration of inorganic anions results in the deactivation of TiO 2/SiO 2 photocatalyst was experimented.Five anions are found to inhibit the activity of photocatalyst at some or all of the concentrations tested,although only HCO - 3have some detrimental effect on catalysts and cannot be reviwed fully.The deactivated catalysts can be regenerate simply with rinsing of HCl.The mechanisms of the deactivation of the catalysts were also discussed.