通过化学沉积法和热处理得到多壁碳纳米管(CNT)负载Fe_2O_3催化剂 Fe_2O_3/CNT,Fe_2O_3的负载质量分数约为15.1%,XRD表征显示,负载的Fe_2O_3存在α-和γ-这2种晶型.考察了Fe_2O_3/CNT催化湿法H_2O_2氧化去除废水中苯酚催化性能,通过苯酚的去除率及反应过程中催化剂活性组分的溶出总量,研究了催化剂制备过程中添加聚乙烯醇对催化剂性能的影响.在苯酚和H_2O_2初始质量浓度分别为350和1 500 mg/L、催化剂投加量为1.0 g/L、温度80 ℃条件下,经过240 min的反应,苯酚去除率达100%,COD去除率为86.1%.
Multi-welled carbon nanotube supported iron oxide(Fe_2O_3/CNT) as catalyst for the oxidation of phenol in waste water by hydrogen peroxide was studied. The catalysts samples was synthesized by a chemical precipitation in the presence or absence of polyvinyl alcohol(PVA) and followed by a heat treatment. X-ray diffraction(XRD) result revealed two crystalline (α-type and γ-type) iron oxide were presented in the catalyst. The content of the active metal oxide component on the CNT was about 15.1%. The catalytic performance were carried out in a glass vessel in a batch operation mode at atmospheric pressure and temperature ranging from 50 ℃ to 90 ℃. At a temperature of 80 ℃, initial phenol concentration of 350 mg/L, hydrogen peroxide 1 500 mg/L and catalysts 1.0 g/L, the phenol conversion and the COD removal rate of the water were 100% and 86.1%, respectively, after 240 min oxidation. The influence of using PVA in the process of catalysts preparation on their catalytic performance was discussed.
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