多孔球状MnO2自组装纳米颗粒的制备及其吸附性能的研究

Preparation of Self-assembling MnO_2 Nanoparticles and its Performance of Adsorption

以聚乙二醇(PEG1000)作为分散剂,由HMnO4和MnSO4的反应成功地制备了纳米MnO2,用X衍射(XRD)和扫描电镜(SEM)对其进行表征,考察了吸附时间、茜素红的初始浓度、温度、吸附剂的投加量及pH对吸附作用的影响。结果显示,产物为粒径300～600nm的球状多孔颗粒MnO2,且分散均匀;制备的纳米MnO2对茜素红的吸附具有迅速、高效的特点,60min可以达到最大吸附,在优化条件下,MnO2吸附茜素红的脱色率可达87.5%以上,适合染料废水的处理。

MnO2 nanoparticles had been successfully prepared by reaction between HMnO4 and MnSO4 using polyethylene glycol（PEG 1000） as dispersant. The product was characterized by XRD and SEM. The results indicated that the product was spherical and uniform separated MnO2 with an average diameter of 300 - 600nm. The influence factors for adsorption of alizarin red including adsorption time, the initial concentration of alizarin red, temperature,sorbent dosage and initial pH had been investigated. The results showed that the adsorption was rapid and effective, and the maximum adsorption was nearly reached in 60 rain. The decolorization rate of alizarin red could be up to 87.5 % under the optimal conditions. The nano-MnO2 was suited for using in disposing dye waste water.