JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (6): 94-99.

• Articles • Previous Articles     Next Articles

Self-assembled 3-aminopropyltrimethoxysilane-phosphomolybdic acid film modified electrode

WEI Pei-hai, LIU Guang-zeng, ZHANG Qi, SHI Cong-wen   

  1. Department of Chemistry, Qilu Normal University, Jinan 250013, China
  • Received:2010-05-07 Online:2010-12-16 Published:2010-05-07

Abstract:

 A composite film modified glassy carbon electrode containing heteropolyanion was fabricated by attaching a Keggin—type heteropolyanion, H3(PMo12O40)·H2O, to a 3-aminopropyltrimethoxysilane (APMS) layer, which was self-assembled on an electrochemically activated glassy carbon electrode through the formation of C—O—Si bond. XPS and cyclic voltammetry were used for the characterization of the composite film. The results showed  that PMo12O403- was linked with APMS through the coulombic interaction between PMo12O403-and amine groups of APMS (PMo12O403--APMS), which greatly improved the film stability. The PMo12O403--APMS modified electrode showed three reversible redox pairs of PMo12O403- with a smaller peak-to-peak separation, which  was stable in a larger pH range compared with that in the solution phase. The catalytic properties of the modified electrode for those reduction of ClO3- 、BrO3- and  IO3- were studied. The modified electrode exhibited better electrocatalytic activities for those three anions compared with the PMo12O403- modified glassy carbon electrode. The detection limits were  1.5×10-5, 1.0×10-6, 5×10-7mol/L for ClO3-, BrO3-and IO3 seperately.

Key words: phosphomolybdic acid, 3-aminopropyltrimethoxysilane, self-assembled film, modified electrode

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!