Abstract: Fe-substituted aluminophosphate molecular sieves were prepared by hydrothermal crystallization and characterized with XRD, FT-IR, N2 adsorption, etc. The results showed that the samples were the typical mesoporous molecular sieves that were short of the long-range ordered crystal structure and had large surface area, which suggested that Fe3+ ion was successfully incorporated into the framework of molecular sieves and mainly existed in tetrahedral coordination after calcination. Fe-substituted aluminophosphate molecular sieves were effective for catalytic oxidation of phenol in aqueous solution with H2O2 as oxidant. Under the conditions of reaction temperature 60℃, reaction time 4 h, phenol initial concentration 3 mmol/L, H2O2 initial concentration 45 mmol/L and pH 4.5, the removal rates of phenol and COD reached 99.5% and 87.9%, respectively. Their catalytic performance was stable and the concentration of Fe3+ leaching-off was little in catalytic oxidation of phenol in aqueous solution.

Key words: mesoporous aluminophosphate molecular sieve, iron, phenol, catalytic oxidation

摘要： 以水热晶化法合成了Fe取代介孔磷铝分子筛，并用XRD, FT-IR, N2吸附等对其进行了表征. 结果表明，合成的分子筛为缺乏长程有序的介孔结构，具有较高的比表面积. 在焙烧后的分子筛中，Fe3+离子主要以四配位的形式存在于骨架中. 该分子筛能有效催化氧化水溶液中苯酚，在反应温度60℃、苯酚起始浓度3 mmol/L、加入45 mmol/L H2O2、溶液起始pH值4.5的条件下，4 h后苯酚去除率达99.5%，COD去除率达87.9%，且催化剂性能稳定，反应过程中有极少量Fe3+离子流失.

关键词: 介孔磷铝分子筛, Fe, 苯酚, 催化氧化