活性艳红X-3B水溶液的光化学与光催化协同脱色反应

 对影响活性艳红X－3B水溶液光化学与光催化协同脱色反应的各种条件（如溶液的pH值，紫外光照强度，空气流量，催化剂用量及溶液的初始浓度等）进行了考察．结果表明，降解率随着紫外光照强度的增强而加快，随着X－3B初始浓度的增大而减慢；催化剂最佳用量为4g／L，空气最佳流量为4．3L／h．在X－3B水溶液的光催化脱色过程中，存在有光解反应，但它远不如光催化反应重要．因此，活性艳红X－3B水溶液的降解是光化学与光催化的协同脱色反应．

Studies on Photochemical and Photocatalytic Synergistic Decoloration of Brilliant Red X-3B Solution

The photocatalytic and photolytic decoloration reactions ofaqueous brilliant red X-3B solution were studied. Th e experimental results showed that the reaction rate was increased with incre asing UV light intensity, and decreased with increasing the initial X-3B concentration . An optimized content of the catalyst in solution was foun d at 4 g/L and an optimized air flow was found at 4.3 L/h. Particularly, the photolysis was found during the photocatalytic dec olor ation of aqueous X-3B solution, though its effect on the reaction was far infer ior t o that of photocatalytic decoloration, so the decoloration of aqueous brilliant red X-3B sol ution is a concerted reaction of photolytic and photocatalytic decoloration in t he range of pH=3～11.