摘要
采用液相化学沉积法经微波焙烧制备了Fe2O3/La2O3/CNTs催化剂。经硝酸预处理的碳纳米管中加入无水乙醇进行分散处理,分步加入Fe3+、La3+,选用NH3·H2O为沉淀剂得到Fe(OH)3、La(OH)3前驱物,经过微波焙烧得到Fe2O3/La2O3/CNTs。与常规的焙烧方式相比,微波焙烧的产物活性较好。用TEM、XRD、XPS方法对产物进行了表征。将其应用于微波强化催化湿式氧化工艺处理高浓度苯酚配水。对于5000mg/L的模拟含酚废水,最佳的处理工艺条件为:微波辐照功率700W,辐照时间5min,微波工作压力为0.4MPa,催化剂加入量0.125～2.5g/L,H2O2加入量25g/L,进水体系pH≤8.0。在此工艺条件下,水中苯酚的去除率达80%。
Carbon nanotubes-supported Fe2O3/La2O3 catalysts are synthesized by chemical liquid deposition-microwave irradiation, using Fe(OH)3 and La(OH)3 as iron and lanthanum sources. Pure alcohol is added to disperse the HNO3 pretreated carbon nanotubes. Fe3+ and La3+ are added respectively. After the samples are irradiated, the catalysts are characterized by TEM, XRD, XPS, and are applied in the treatment of high concentration phenol wastewater, by microwave enhanced catalytic wet oxidation. In simulating the treatment of phenol wastewater, at the concentration of 5000 mg/L, the optimal treatment conditions are as follows: the microwave power is 700W, the irradiation time is 5min, the microwave working pressure is 0.4 MPa, the catalyst concentration is 0.125～2.5g/L, the H2O2 concentration is 25g/L and the pH of the system is equal to or below 8.0. The removal rate of phenol in the water reaches 80%.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2007年第S2期283-285,共3页
Materials Reports
基金
高校博士点专项科研基金(20040213027)
国家自然科学基金(50678045)
关键词
微波
碳纳米管
负载型催化剂
氧化铁
氧化镧
苯酚
microwave, carbon nanotubes, supported catalyst, Fe2O3, La2O3, phenols
