Mn^(2+)在Ti/SnO_2+SbO_x/PbO_2电极上的电氧化研究

比较了Ti/SnO2 +SbOx/PbO2 电极与Ti/PbO2 电极在电解Mn2 +体系中的析氧极化曲线、Mn2 +的氧化极化曲线和电极寿命 ,发现加入中间层后的Ti/SnO2 +SbOx/PbO2 电极对Mn2 +的电氧化有更好的催化活性和较长的使用寿命 .用正交实验法探讨影响Mn2 +→Mn3 ++e电极过程的因素 ,找出以Ti/SnO2 +SbOx/PbO2 电极为阳极用无隔膜电解槽电解Mn2 +的最佳工艺条件 ,在此条件下的平均电流效率达 95 .6 % .

硫酸介质中Ti/SnO_2/PbO_2析氧阳极的研究

由于硫酸溶液具有高的电导、一般条件下性质稳定、价格相对低廉等优点，所以电化学合成大多在硫酸溶液中进行．阳极析氧是电化学合成不可避免的阳极过程．但因硫酸的强腐蚀性，以及从阳极析出的氧的强氧化性，使得能满足工业生产的阳极材料很缺乏．自１９５０年荷兰Ｈｅｎ...

聚苯胺中间层改性Ti/PbO2电极的制备及其降解性能

引入导电聚合物聚苯胺膜(PANI,polyaniline)对Ti/PbO2电极进行改性,采用两步电沉积法成功制备出Ti/PANI/PbO2电极。通过扫描电镜(SEM)、X射线衍射(XRD)、线性伏安扫描(LSV)和交流阻抗(EIS)对制备的电极进行表征,以甲基橙为目标污染物,探讨了PANI的沉积时间对电极性能的影响,并研究了Ti/PANI/PbO2电极对罗丹明B和4-硝基苯酚的降解性能。结果表明,PANI的引入未影响活性层PbO2的晶相结构和形貌特征,但显著提高了电极的析氧电位,Ti/PANI/PbO2的析氧电位可达3.43V。当PANI聚合时间为30min时,电极Ti/PANI-30/PbO2的电化学性能和电催化降解效果最佳。在电流密度为30mA/cm^2、污染物初始浓度为50mg/L、Na2SO4浓度为0.1mol/L的实验条件下,反应120min后,Ti/PANI-30/PbO2对甲基橙、罗丹明B和4-硝基苯酚的去除率分别为99.8%、99.9%和94.0%。

Electrochemical Oxidation of Chlorimuron-ethyl on Ti/SnO_2-Sb_2O_5/PbO_2 Anode for Waste Water Treatment

The electrochemical oxidation of chlorimuron-ethyl on metry. The electrochemical behaviour of the electrode in a sodium Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltamsulfate solution and in the mixture solution of sodium sulfate and chlorimuron-ethyl was studied. The experimental results of cyclic voltammetry show that the acidic medium was suitable for the efficient electrochemical oxidation of chlorimuron-ethyl. Some electro-generated reagent was formed in the electrolysis process and chlorimuron-ethyl could be oxidized by the electro-generated reagent. A Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-Vis spectrometry and high performance liquid chromatography（HPLC）, and the chemical oxygen demand（COD） was determined by the potassium dichromate method. The mechanism of chlorimuron-ethyl to be oxided was studied primarily by the cyclic voltammetry and UV-Vis spectrometry. The results of electrolysis experiment demonstrate the possibility of the electrode to be used as an anode for the electrochemical treatment of chlorimuron-ethyl contained in waste water.

钛基二氧化铅平板电极的镀制

利用所镀二氧化铅电极和氧阴极组装成电解槽，通过测定高氯酸盐生成电流效率及循环伏安、ＳＥＭ、ＳＲＤ等方法，评价所镀钛基二氧化铅平板电极性能．考察了电镀液组成（Ｆ－、ＨＮＯ３、Ｂｉ３＋、Ｆｅ３＋、表在活性剂）对电极性能的影响，发现必须严格控制镀液中铁离子的含量，增大硝酸的使用量，才能制得用于高氯酸盐电化生产的高性能钛基二氧化铅电极．

钛基二氧化铅电催化电极的制备及电催化性能研究

以电沉积法制备了钛基 Pb O2 电极 ,优化并确定了电极的制备工艺 .以苯酚为目标有机物 ,考察了电极的电催化氧化性能 .研究结果表明 ,该电极的电催化性能优于传统的 DSA钛基 Ru O2 电极 .采用该电极 ,在 10 m A /cm2电流密度下通过 0 .72 Ah电量后 ,可使 10 0 m L、COD浓度为 2 70 mg/ L 的苯酚溶液中的苯酚完全分解 ,COD去除率为 6 7.4% ,单位电量 COD降解量为 0 .2 5 4mg COD/ Ah,且电流效率随电流密度的增加而减小 .初步研究了苯酚的电催化氧化机理 。