Ni-TiO_(2)双金属纳米电极去除水中硝酸盐研究  

Study on nitrate removal from water by Ni-TiO_(2) bimetallic nano-electrode

作　　者：许金盾 田思梦 刘芳 Xu Jindun;Tian Simeng;Liu Fang(Transportation institute of Inner Mongolia University,Hohhot 010020)

机构地区：[1]内蒙古大学交通学院,呼和浩特010020

出　　处：《化工新型材料》2024年第S02期370-374,共5页New Chemical Materials

基　　金：内蒙古自然科学基金项目(2024MS02012)。

摘　　要：通过优化电极的制造方法,开发了一种新型的Ni-TiO_(2)双金属纳米电极,并以Pt为阳极,该双金属纳米电极为阴极,搭建电化学系统。研究了该双金属纳米电极在不同电流密度、初始硝酸盐浓度、温度、pH条件下对硝酸盐去除率的影响,并观察了不同阳极材料和氯化钠浓度在去除硝酸盐时对亚硝酸盐和氨氮生成的影响。结果表明:在电流密度为30mA/cm^(2)的条件下,电解90min后,Ni-TiO_(2)双金属纳米电极对硝酸盐的去除率高达93.4%;随着硝酸盐初始浓度的增加,去除率先升高后下降;随着温度和pH的提高,硝酸盐的去除率也在逐步增加;用IrO_(2)作为阳极,在0.3g/L NaCl溶液中电解90min后,硝酸盐的去除率达到90.1%,且几乎不产生氨氮和亚硝酸盐副产品。A novel Ni-TiO_(2)bimetallic nano-electrode was developed by optimizing the fabrication method of the electrode,and the electrochemical system was built with Pt as the anode and this bimetallic nano-electrode as the cathode.The effects of this bimetallic nano-electrode on nitrate removal under different current densities,initial nitrate concentrations,temperatures,and pH conditions were investigated,and the effects of different anode materials and sodium chloride concentrations on nitrite and ammonia nitrogen generation during nitrate removal were observed.The results showed that the removal rate of nitrate by Ni-TiO_(2)bimetallic nano-electrode was as high as 93.4%after electrolysis for 90 min under the condition of current density of 30mA/cm^(2).With the increase of the initial concentration of nitrate,the removal rate firstly increased and then decreased.With the increase of the temperature and pH,the removal rate of nitrate was also gradually increased.Using IrO_(2)as the anode,the nitrate removal reached 90.1%after 90 min of electrolysis in 0.3g/L NaCl solution with little ammonia nitrogen and nitrite byproducts.

关 键 词：纳米电极 硝酸盐 电化学 阴极 阳极 

分 类 号：X523[环境科学与工程—环境工程]