Co纳米导电滤膜制备及其在一体式EMBR中的应用

Preparation of Co nano conductive filter membrane and its application in integrated EMBR

在一体式EMBR体系中,为解决输出功率低、阴极膜成本高等问题,制备了相对廉价的Co纳米材料并涂覆成导电膜,通过TEM、SEM对其进行表面形态分析,并通过XRD、BET、XPS等手段研究碳化温度对Co纳米材料催化性能的影响,结果显示,通过高温热解得到的Co-NPs可以提供较大的比表面积和大量微孔结构,可有效促进ORR反应进行。另外,Co-NPs中的N元素以吡啶N、石墨化N为主,也可提高ORR活性。将此导电膜用于EMBR中处理焦化废水,结果表明,其最大功率为934.3 mW/m^(3),对COD、总氮、氨氮和挥发酚的降解率分别为97.2%,43.8%,82.9%和99.8%,能满足一些实际工业废水降解及能源回收的需求。

In the integrated EMBR system,in order to solve the problem of low output power and high cost of cathode film,this paper prepared relatively cheap Co nanomaterials and coated them into conductive membranes.Analysis of surface morphology of nanomaterials and conductive films by TEM,SEM,and the effect of different carbonization temperature was studied based on XRD,BET,XPS.Co-NPs can provide large specific surface area and a large number of microporous structure and it is advantageous to the three-phase transfer and adsorption of protons and oxygen.So it can effectively promote the ORR reaction.In addition,the main forms of N were pyridine N and graphitization N which can improve ORR activity.Application of the conductive film in EMBR treatment to treat coking wastewate with the maximun power density of 934.3 mW/m^(3).The degradation rates of COD,total nitrogen,ammonia nitrogen and volatile phenol in Angang’s coking wastewater are 97.2%,43.8%,82.9%and 99.8%respectively,which can meet the needs of some actual industrial wastewater degradation and energy recovery.