A facile preparation of H2O2 sensors using layer-by-layer deposited thin films composed of poly(ethyleneimine) and carboxymethyl cellulose as matrices for immobilizing hemin

作者：Wang Baozhen; Du Xiaoyan; Wang Maoqing; Gong Weilei; Anzai Jun ichi^*

来源：Electroanalysis, 2008, 20(9): 1028-1031.

DOI：10.1002/elan.200704112

• H2O2 sensors
• LbL film
• hemin
• electrocatalysis

A layer-by-layer (LbL) thin film composed of poly(ethyleneimine) (PEI) and carboxymethyl cellulose (CMC) was prepared on the surface of a gold (An) disk electrode and the LbL layer was impregnated with hemin to fabricate amperometric hydrogen peroxide (H2O2) sensors. Hemin can be easily immobilized in the LbL layer by immersing the LbL film-coated electrode in the hemin solution. The hemin-modified electrode thus prepared exhibited an amperometric response to H2O2 on the basis of the electrochemical reduction catalyzed by hemin. The output current of the hemin-modified electrode depended on the concentration of H2O2 over the range of 0.005 - 1.0 mM. Thus, the LbL film composed of PEI and CMC was found to be an excellent material for the facile preparation of hemin-based H2O2 sensors.

• 出版日期2008-5
• 单位哈尔滨医科大学