膜科学与技术

光催化双极膜水解离的研究

作者：陈强¹，郑淑英²，陈晓¹，郑曦¹，陈震¹，²

单位： 1福建师范大学化学与材料学院, 福州,350007;

关键词：双极膜; 羧甲基纤维素钠; 壳聚糖; 二氧化钛; 蒽醌; 光催化

出版年,卷(期):页码： 2011,31(1):56-60

摘要：

减少双极膜的阻抗, 提高水解离效率已成为双极膜研究的焦点. 为此本文在双极膜的中间层中涂布纳米尺寸的光催化剂TiO2和光敏剂蒽醌(Anthraquinone, 缩写为Anth), 制得三明治式的双极膜. 用扫描电镜(SEM), 电化学工作站等对制得的膜进行了表征.实验结果表明,在紫外光照射下,以TiO2-Anth修饰的双极膜表现出更高的水解离效率及氢离子和氢氧根离子的渗透率, 阻抗减小, 工作电压将（降）低等特点. 当工作电流密度达125 mA•cm-2时, 电槽工作电压小于5.0 V,

How to promote water splitting at the intermediate layer and lower the IR drop of bipolar membrane (BPM) is the focus of BPM research. In the interlayer of bipolar membrane modified with nanometer–sized TiO2 as a photo-catalyst and Anthraquinone (abbreviated as Anth) as a photosensitizer. SEM and electrochemical workstation were used to characterize the BPMs. Experimental results showed that,the sandwich-type BPM exhibited a several good properties: a higher efficiency for the water splitting in the interlayer, a higher operation current density, lower impedance and working voltage. When the working current density is at 125 mA•cm-2, the working voltage is as low as 5.0 V under the UV illumination.

陈强（1985－）, 男, 福州闽侯人,硕士生；研究方向为应用电化学，

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