Abstract:

Carbon nanotubes were doped with boron and nitrogen respectively, and the metal-free catalyst prepared from them was used to activate peroxymonosulfate(PMS) for the catalytic degradation of phenol wastewater. The results showed that the catalytic degradation effect of PMS activated by nitrogen-doped carbon nanotubes was slightly better than that of boron-doped carbon nanotubes. When pH was at 3 to 11, the first-order kinetic constant of nitrogen-doped carbon nanotube was approximately twice that of boron-doped carbon nanotube. The reasons for the difference between the two catalysts may be related to the degree of defects, the form of doping elements, the catalytic reaction process and the types of reactive species.

Key words: advanced oxidation, carbon nanotube, metal-free catalyst, phenol wastewater, peroxymonosulfate

摘要：

用硼元素和氮元素分别对碳纳米管进行掺杂，将制备的无金属催化剂活化过一硫酸盐（PMS）用于处理苯酚废水。结果表明，氮掺杂碳纳米管活化PMS对苯酚的降解效果略优于硼掺杂碳纳米管的催化效果。当pH为3~11时，氮掺杂碳纳米管的一级动力学常数大约是硼掺杂碳纳米管的2倍。造成两者催化活性差异的原因与缺陷程度、掺杂形式、催化反应过程以及活性物质的种类有关。

关键词: 高级氧化, 碳纳米管, 无金属催化剂, 苯酚废水, 过一硫酸盐

CLC Number: 

• X703.1