镍/聚丙烯电极在电解水和废水净化中的应用

Application of a nickel/polypropylene fabric electrode in water electrolysis and wastewater purification

为制备低成本可高效电解水的电极,以轻薄柔软的口罩外层聚丙烯无纺布为基底,通过低温溶剂热法(120℃)、电化学沉积两步工艺制备了金属镍电极。研究发现,电极表面均匀且密集地排列了垂直生长的纳米片,比表面积大;在电压为2.1V和-0.8V时,电流密度达到了130mA/cm^(2)的产氧电流和-130mA/cm^(2)的产氢电流,优于泡沫镍和电磁屏蔽布电极;在催化降解罗丹明B印染废水的试验中发现,在1.9V的电压下,仅需10min,染料的降解率可达到50%,在75min内可实现对罗丹明B的完全降解,表现出优异的快速电催化降解能力。

In order to prepare low-cost and high-efficiency electrodes for applied electrochemistry,metal nick⁃el electrodes are prepared by low-temperature solvothermal method(120℃)and electrochemical deposition on a thin and soft polypropylene non-woven fabric.Characterization finds that the electrode surface is uniform⁃ly and densely arranged with vertically grown nanosheets,showing a large specific surface area.The fabricated nickel/polypropylene electrode exhibits excellent water splitting efficiency found that when the voltage is 2.1 V and-0.8 V,the current density reaches 130 mA/cm^(2) and-130 mA/cm^(2) for oxygen evolution and hydrogen evolu⁃tion,respectively.These results are better than those of foam nickel and commercial electromagnetic shielding cloth.Electrocatalytic degradation of Rhodamine B using the Ni/polypropylene electrode shows a fast degrada⁃tion performance,only 10 min by 50%and within 75 min by almost 100%.