JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (6): 94-99.
• Articles • Previous Articles Next Articles
WEI Pei-hai, LIU Guang-zeng, ZHANG Qi, SHI Cong-wen
Received:
Online:
Published:
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
WEI Pei-hai, LIU Guang-zeng, ZHANG Qi, SHI Cong-wen. Self-assembled 3-aminopropyltrimethoxysilane-phosphomolybdic acid film modified electrode[J].JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2010, 40(6): 94-99.
0 / / Recommend
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks
URL: http://gxbwk.njournal.sdu.edu.cn/EN/
http://gxbwk.njournal.sdu.edu.cn/EN/Y2010/V40/I6/94
Cited