To investigate the influence of inorganic salt on the photocatalytic degradation, the effects of KBr and KI at various concentrations and pH values on the photocatalytic degradation of dye W-7G using nanoscaled titanium dioxide as photocatalyst in a bubbling fluidized bed photocatalytic reactor (BFBPR) were studied. The results indicated that the degradation apparent rate constant () of the system with KI was clearly higher than that with KBr under acidic or alkaline conditions. And the maximum value of (0.01127) appeared at the KI concentration of 0.075 g L^-1 with a pH value of 9.37, meaning the highest degradation efficiency. Furthermore, the possible mechanism of photocatalytic degradation of W-7G in the presence of KBr and KI was proposed, which could provide a theoretical support for the further study of inorganic salt effects on the photocatalytic degradation of dyes.

中文翻译：

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KBr和KI对纳米TiO2催化降解染料W-7G的影响。

为了研究无机盐对光催化降解的影响，在鼓泡流化床光催化反应器（BFBPR）中，使用纳米级二氧化钛作为光催化剂，在不同浓度和pH值下KBr和KI对染料W-7G的光催化降解的影响。研究。结果表明，在酸性或碱性条件下，KI体系的降解表观速率常数（）明显高于KBr体系。KI浓度为0.075 g L ^-1时出现最大值（0.01127）pH值为9.37，意味着最高的降解效率。提出了KBr和KI存在下W-7G光催化降解的可能机理，为进一步研究无机盐对染料的光催化降解提供理论支持。