Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (12): 2438-2444.doi: 10.3866/PKU.WHXB20091110

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Preparation and Characterization of CoPc(COOH)8-SA/mCS Bipolar Membranes

CHEN Ri-Yao, CHEN Zhen, ZHENG Xi, CHEN Xiao, HUANG Cai-Xia   

  1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China; Chemistry Department, Fujian Ningde Teachers College, Ningde 352100, Fujian Province, P. R. China
  • Received:2009-06-09 Revised:2009-07-17 Published:2009-11-27
  • Contact: CHEN Zhen E-mail:zc1224@pub1.fz.fj.cn

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Abstract:

A sodiumalginate (SA) cation layer was modified by cobalt octocarboxyphthalocyanine (CoPc(COOH)8) to improve its ion exchange capacity and to promote water splitting at the interlayer. The CoPc(COOH)8-SAand chitosan (CS) were then modified using Fe3+ and glutaraldehyde as linking reagents to prepare CoPc(COOH)8-SA/mCS bipolar membranes (BPMs). FT-IR spectra and SEM were used to characterize CoPc(COOH)8-SA/mCS BPMs. Experimental results showed that the ion exchange capacity and hydrogen ion transmigration rate of the CoPc(COOH)8-SA cation exchange membrane had increased. By comparison to the mSA/mCS BPMthat was modified by Fe3+ or ferrocene, the AC impedance, IR drop and the swelling degree of the CoPc(COOH)8-SA/mCS BPMs all decreased. The IR drop of the CoPc(COOH)8-SA/mCS BPMwas only 0.7 Vat a higher current density of 105 mA·cm-2.

Key words: Bipolar membrane, Cobalt octocarboxyphthalocyanine, Sodiumalginate, Chitosan, Interlayer, Water splitting