Selective Aerobic Oxidation of Aromatic Alcohols Catalyzed by TiO2: An Insight on The Effect of Surface Fluorination

摘要：

To achieve better activity,TiO2 was modified through surface fluorination using hydrofluoric acid (denoted as HF-TiO2).The photocatalytic activities of the as-prepared HF-TiO2 and pure TiO2 photocatalysts were evaluated for selective aerobic oxidation of benzyl alcohol.Experimental results indicated that without any loss of selectivity (>98％),distinct rate enhancement can be observed on HF-TiO2 comparing to pure TiO2.To optimize the condition of pretreatment,different concentrations of hydrofluoric acid were also used and the optimal concentration was determined to be 2％.Moreover,the dynamics of benzyl alcohol oxidation followed pseudo-first-order kinetic.By ESR technique and experiments adding different captures,the active specie is determined to be O2 while O2.- and H2O2 were byproducts of the reaction.In a word,this study opens a new path to obtain both high selectivity and conversion yield by TiO2 photocatalysis.

关键词： selective oxidation photocatalysis TiO2 surface fluorination

作者: Qi Wang

作者单位: School of Environment Science and Engineering Zhejiang Gongshang University Hangzhou,China

会议类型: 国际会议

会议名称: 2010 International Conference of Environment Materials and Environment Management(2010年环境材料与环境管理国际学术会议 EMEM 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 327-330

在线出版日期: 2010-07-24（万方平台首次上网日期，不代表论文的发表时间）