摘要
以水热晶化法合成了铁磷铝分子筛FeAPO-5,并用XRD、SEM、FT-IR和UV-Vis等对分子筛样品进行了表征。结果表明,所合成的FeAPO-5分子筛样品结晶度高,晶粒大小均匀,FeAPO-5样品中存在骨架Fe和骨架外Fe物种,并以骨架Fe物种为主。FeAPO-5作为一种非均相催化剂能有效催化氧化水溶液中苯酚,在苯酚初始浓度200mg.L-1、H2O2初始含量1200mg.L-1、pH5.0及溶液温度80℃的条件下,处理240min后苯酚去除率达99.0%,TOC去除率可达77.8%。ICP分析结果表明,催化剂上析出到溶液中的铁离子浓度很低,催化剂性能稳定。
Iron-substituted aluminophosphate molecular sieves （ FeAPO-5 ） were synthesized by hydrothermal crystallization and characterized with XRD, SEM, FT-IR and UV-Vis techniques. The results showed that the synthesized samples had good crystallinity and uniform grain. From the obtained characterization results, it could be concluded that both the framework and extra-framework Fe species were together present in the FeAPO-5 samples, and most iron ion was incorporated into the AlPO4-5 framework. FeAPO-5 as a heterogeneous catalyst is effective for catalytic oxidation of phenol in aqueous solutions with H2O2 as oxidant. The best results （99.0% phenol conversion, 77.8% total organic carbon） after 240 min at 80℃ were obtained with phenol initial concentration 200 mg · L ^-1, H2O2 initial concentration 1200 mg· L ^-1 and pH5.0. Meanwhile, inductively coupled plasma （ICP） spectrometry results indicated that the concentration of leaching-off Fe^3＋ in the solution was very little and the FeAPO- 5 molecular sieves was stable in the process of catalytic oxidation of phenol in aqueous solutions.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第2期348-353,共6页
CIESC Journal
基金
教育部高校博士点科研基金项目(20040291005)
