碘化钾-过氧化氢催化分解反应体系中副反应的研究  

Secondary reaction in the KI-H_2O_2 catalytic decomposition system

作　　者：高玉华[1] 陈传祥[1] 

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2008年第4期78-80,共3页Journal of Jiangsu University of Science and Technology:Natural Science Edition

摘　　要：基于过氧化氢同碘化钾反应后的溶液呈黄色,碘离子含量明显低于加入碘化钾的含量,体系的pH值随过氧化氢含量的增加而增加的事实,推断碘化钾-过氧化氢催化反应体系有副反应发生.副反应生成了碘,使得体系的颜色呈黄色,吸收峰红移,碘的浓度随过氧化氢的含量增加而增大,副反应生成了碱性物质,而使体系的pH值增加,副反应消耗了碘离子.The solution of KI - H2O2 reaction system is yellow, in which the contents of I2 is much lower than that of KI, and the pH value of the system increases with the contents of H2O2. These results indicate that secondary reaction occurs during the above catalytic decomposition, contributing to the production of I2. This leads to the yellow color of the solution and red shift of the absorption peak. The concentration of I2 increases with the contents of H2O2. In addition, the secondary reaction generates alkaline substances which leads to the increase of pH, and consumes I2.

关 键 词：过氧化氢 催化分解反应 副反应 

分 类 号：O683.32[理学—化学] O657.31