纳米SnO_2-TiO_2改性双极膜的制备及表征  

Preparation and characterization of bipolar membrane modified by nano-SnO_2-TiO_2

作　　者：刘宪[1] 陈晓[1] 胡艳玉[1] 陈日耀[1] 陈震[1] 

机构地区：[1]福建师范大学环境科学与工程学院,福建福州350007

出　　处：《应用化工》2012年第9期1513-1516,1521,共5页Applied Chemical Industry

基　　金：福建省科技厅重点项目(2012H0019);福建省教育厅项目(JA10074;JB09052)

摘　　要：将纳米SnO2-TiO2复合半导体材料添加到壳聚糖(CS)阴离子交换膜中,制备了PVA-CMC/nano-SnO2-TiO2-CS双极膜(CMC羧甲基纤维素钠,PVA聚乙烯醇),并用扫描电镜、接触角测定仪等对其进行了表征。研究表明,添加纳米SnO2-TiO2可提高双极膜的亲水性和机械性能。在高压汞灯照射下,纳米SnO2-TiO2复合半导体材料较纳米SnO2或纳米TiO2单一半导体材料具有更强的光催化双极膜中间界面层水解离能力,从而大大降低双极膜的膜阻抗和膜电阻压降(即IR降)。Nano-SnO2-TiO2 coupled semiconductor was added into chitosan （CS） anion exchange mem- brane layer to prepare PYA-CMC/nano-SnO2-TiO2-CS （ CMC ： carboxymethyl cellulose ; PVA ： polyvinyl alcohol） bipolar membrane （BPM）, and the prepared BPM was characterized by SEM, contact angle measurer and so on. Experimental results showed that nano-SnO2-TiO2 had better photocatalytie property for water splitting in the interlayer of BPM than nano-SnO2 or nano-TiO2 semiconductor, which could greatly reduce membrane impedance and IR drop of BPM under the irradiation of high-pressure pump lamps. Furthermore, the hydrophilicity and mechanical properties of the BPM were increased after modifi- cation by nano-SnO2-TiO2.

关 键 词：双极膜 光催化 水解离 纳米SNO2 纳米TIO2 

分 类 号：O646[理学—物理化学]