活性艳红X-3B水溶液的光化学与光催化协同脱色反应

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

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 .

The photocatalytic and photolytic decoloration reactions of aqueous brilliant red X-3B solution were studied. The experimental results showed that the reaction rate was increased with increasing UV light intensity, and decreased with increasing the initial X-3B concentration. An optimized content of the catalyst in solution was found at 4 g/L and an optimized air flow was found at 4.3 L/h. Particularly, the photolysis was found during the photocatalytic decoloration of aqueous X-3B solution, though its effect on the reaction was far inferior to that of photocatalytic decoloration, so the decoloration of aqueous brilliant red X-3B solution is a concerted reaction of photolytic and photocatalytic decoloration in the range of pH = 3 similar to 11.