钴铝水滑石涂膜电极的制备及电催化还原硝酸盐的研究  

Research on preparation of cobalt aluminum hydrotalcite coated electrode and electrocatalytic reduction of nitrate

作　　者：貟亚锋 李亮[1] 罗梦玉 杨婷婷 胡守波 YUN Yafeng;LI Liang;LUO Mengyu;YANG Tingting;HU Shoubo(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《水资源与水工程学报》2018年第3期75-79,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51208299)

摘　　要：硝酸盐污染物广泛分布于地表水与地下水中,为了探索检测及去除水体中硝酸盐污染物的有效方法,采用双滴定法制备了不同摩尔比的钴铝水滑石化合物,通过X射线衍射、场发射扫描电子显微镜对钴铝水滑石化合物进行表征。结果表明:钴铝摩尔比为1∶1,2∶1,3∶1时,均形成了水滑石特有的结构。实验利用钴铝水滑石制备成涂膜电极,通过线性伏安扫描法研究各电极材料电化学还原硝酸盐的效果。钴铝摩尔比为2∶1时电化学还原硝酸盐的效果最好,并且还原峰电流与硝酸盐浓度及扫描速率呈线性关系。实验结果表明:钴铝水滑石涂膜电极可应用于电化学检测硝酸盐和去除硝酸盐的工艺中。Surface water is currently seriously polluted by nitrate. In this research,cobalt aluminum hydrotalcite compounds with different molar ratios were prepared with double titration method. The cobalt aluminum hydrotalcite compounds were characterized by means of X-ray diffraction and field emission scanning electron microscopy. The results show that the unique structure of hydrotalcite is formed when the molar ratio of cobalt to aluminum is 1∶ 1,2∶ 1 and 3∶ 1. Cobalt aluminum hydrotalcite was used to prepare coated electrode,and the effect of electrochemical reduction of nitrate on the electrode materials was studied by linear sweep voltammetry. It is concluded that when the molar ratio of cobalt to aluminum is 2∶ 1,the electrochemical reduction of nitrate has the best effect,and there is a linear relationship between the peak current and the reduction of nitrate concentration and scan rate. The experimental results show that cobalt aluminum hydrotalcite coating electrode can be used in the electrochemical detection of nitrate and nitrate removal process.

关 键 词：钴铝水滑石 涂膜电极 电催化还原法 硝酸盐 

分 类 号：X52[环境科学与工程—环境工程] O657.1[理学—分析化学]