|
|||||
|
|
Enhanced luminol electrochemiluminescence triggered by an electrode functionalized with dendrimers modified with titanate nanotubes |
|
| Authors: | Yanyu Lin Hong Dai Guifang Xu Ting Yang Caiping Yang Yuejin Tong Yusheng Yang Guonan Chen |
| Affiliation: | 1. Key Laboratory of Humid Subtropical Ecogeographical Process of the Ministry of Education, College of Geographical Science, Fujian Normal University, Fuzhou, 350007, China 2. College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian, 350007, China 3. Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, and Department of Chemistry, Fuzhou University, Fuzhou, Fujian, 350002, China |
| Abstract: | We have constructed a novel electrochemiluminescence (ECL) platform by functionalizing a poly(amidoamine) dendrimer (PAAD) with titanate nanotubes (TiNTs). The PAAD has an open spherical structure that possesses a high density of active groups and thus favors mass transport, while the TiNTs possess excellent electronic conductivity and thus can promote electron transfer on the surface of a glassy carbon electrode (GCE). A study on the intensity and stability of the ECL of luminol on the modified GCE revealed a substantial improvement compared to that of a bare GCE. The effects of the concentration of TiNTs, the pH value of the solution, and of electrochemical parameters on the intensity of the ECL of luminol were studied and resulted in a sensitive ECL sensor for hydrogen peroxide (H2O2) that works in the concentration range of 1 nM to 0.9 μM. The scavenging effect of superoxide dismutase (SOD) on the H2O2 electrode ECL was then exploited to design a biosensor for the determination of SOD in concentrations between 50 and 500 nM. The reaction mechanism schematic diagram of luminol ECL on the PAAD/TiNTs modified eledtrode. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |