纳米二氧化钛上环己烷光催化氧化反应的动力学及影响因素

Kinetics of Photocatalytic Oxidation Cyclohexane over Nano TiO 2 and Its Influence Factors

介绍了用不同起始浓度环己烷的乙腈溶液进行光催化实验，并对纳米二氧化钛上环己烷光催化氧化反应的动力学进行了研究．从反应的初始浓度与光催化氧化产物的初始生成速率的关系上得出：光催化氧化反应的动力学符合ＬａｎｇｍｕｉｒＨｉｎｓｈｅｌｗｏｏｄ动力学模型，并以产物的生成速率倒数对反应物初始浓度的倒数作图得到一线性关系，从另一侧面说明ＬＨ模型的正确．

Photocatalytic oxidation cyclohexane into cyclohexanol and cyclohexanone over nano TiO 2 particles under mild conditions by molecular oxygen have been investigated.It has been found that the kinetics of the above mentioned reaction accords with Langmuir Hinshelwood model.This shows that the kinetic control step is electron transfer process between excited nano TiO 2 and adsorbed H 2O.The influence of various parameters on photocatalytic reaction have been examined.It has been discovered that molecular oxygen and inorganic salts do have a significantly effect on photocatalytic efficiency.