活性炭纤维负载CuO改性及其性能表征

以Cu(NO_3)_2溶液作为前躯体,采用浸渍–煅烧法对盐酸预处理后的活性炭纤维(activated carbon fiber,ACF)毡进行负载氧化铜化学改性,制备CuO/ACF电极材料。通过扫描电镜(SEM)、X射线光电子能谱仪(XPS)、比表面积及孔径分析仪以及傅立叶变换红外光谱仪(FTIR)对ACF及其负载CuO后的形貌与结构、元素组成、比表面积、孔径等进行观察与分析,并利用电化学工作站测试其电化学性能。结果表明:经过负载CuO化学改性的CuO/ACF电极材料,比表面积及孔容较改性前分别下降31.94%和33.95%,表面含氧基团增多,出现明显的Cu—O键,CuO/ACF电极材料中Cu元素的质量分数为13.7%;负载CuO后比电容升高17.95%,电吸附性能提高。CuO/ACF材料可作为电极材料用于去除废水中的无机盐离子。

Preparation and characterization of activated carbon fiber material modified by CuO

CuO/ACF electrode materials were prepared using activated carbon fiber (ACF) felt with HCl pretreatment as raw materials, which were loaded with copper oxide (CuO) by impregnation-burning method with Cu(NO3)2solution as the precursor. Physical and chemical properties of the ACF before and after loaded CuO samples were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), specific surface area and pore size analysis, and fourier transform infrared spectroscopy (FTIR); the changes of electrochemical performance of the samples were analyzed by using electrochemical workstation. The results show that CuO/ACF electrode materials are successfully prepared. Specific surface area and total pore volume of CuO/ACF decrease by 31.94% and 33.95%, respectively. The surface oxygen groups increase, with obvious Cu—O bonds after loading with the metal oxides. The mass fraction of Cu in CuO/ACF is 13.7%; and the specific capacitance has an increase of 17.95% in comparison with original ACF after loading with CuO. CuO/ACF materials can be used as an electrode material for the removal of the inorganic ions in wastewater.