摘要
通过溶胶-凝胶和浸渍相结合的方法分别制备了掺杂铜的不同质量分数的Cu/Fe2O3固体催化剂,并使用XRD、EDS及TEM等方法对催化剂进行了表征,结果表明,载体为赤铁矿型的Fe2O3,负载铜后并没有引起Fe2O3晶型的变化,铜在Fe2O3中处于高分散状态。在常压,低温5～30℃范围内,考察了该催化剂在CWPO工艺中的催化活性,结果表明,对于10 mg/L的茜素红模拟染料废水,当催化剂质量分数为2.5%、Cu/Fe2O3和氧化剂H2O2的投加量分别为0.05 g和0.02 mol/L,反应30 min时,在反应温度5℃,茜素红的降解率可达42%,15℃时,降解率和COD去除率分别可达91%和83.1%,表明该催化剂在CWPO工艺中具有较高的催化活性,且催化剂的重复性实验表明,其具有良好的稳定性。
The solid Cu/Fe2O3 catalysts are prepared by combining so1 -gel and impregnation meth- ods. The experimental techniques of XRD, EDS and TEM are used to characterize the catalysts. The results of characterizations show that the carrier is hematite Fe2O3, the crystalline structure of Fe2O3 is unchanged after loading Cu, and Cu is highly dispersed on the surface of Fe2O3. The catalytic activity of the as - prepared （CWPO） under atmospheric catalysts is investigated by catalytic wet peroxide oxidation process pressure at low temperature （5 - 30℃）, and the results show that at low temperature （5℃）, the degradation percentage of 10 mg/L Alizarin red is 42% with the amount of 0.05 g 2.5 % Cu/Fe203 catalyst and 0.02 mol/L H202 input after reacting 30 minutes, the 91% degradation percentage and 83.1% COD removal efficiency could be attained at 15℃, which show that the catalyst has high catalytic activity in CWPO technology. At the same time, the repetitive experimental results of catalyst have shown that the catalyst displays excellent stability.
出处
《环保科技》
2012年第1期1-4,8,共5页
Environmental Protection and Technology
基金
贵州省自然科学基金项目(20072013)
贵州大学人才基金项目(X060025)
