Electrochemiluminsecence Study of Perovskite -type oxides LaTiO3-Ag0.1 with Ru(bpy)32+ modified electrode

• Published in: International journal of electrochemical science Vol. 8; no. 2; pp. 1911 - 1919
• Main Authors: Wang, Yin-zhu, Zhong, Hui, Li, Xiao-mo, Jia, Fei-fei, Ding, Bao-chen, Gu, Bin, Zhan, Wei-guang, Cheng, Zhi-peng, Zhang, Li-li, Li, Shu-ping, Wang, Ji-kui
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2013
• Subjects: Luminescence; Nanocomposite; perovskite-type oxides; Sensors; Nanocomposite; Sensors; Luminescence; perovskite-type oxides
• ISSN: 1452-3981; 1452-3981
• DOI: 10.1016/S1452-3981(23)14276-3

The unique perovskite-type oxides LaTiO3-Ag0.1 was synthesized and used to combine with Tris(2,2’bipyridyl)ruthenium(II) on a glassy carbon electrode as an electrochemiluminescence(ECL) sensor. Ru(bpy)32+ was firmly immobilized on the surface of the electrode due to the large specific surface of LaTiO3-Ag0.1 and the electrostatic interaction. The immobilized Ru(bpy)32+ could maintain its ECL behavior in response to the co-reactants tripropylamine(TPA) and had high sensitivity. The ECL sensor showed a good linear range from 6.4 nM to 1.1 μM and the detection limit was 1 nM (S/N=3). The detection limit was about 2 orders of magnitude lower than that of previously reported methods TiO2 or SiO2 for the determination of TPA. The ECL sensor presented good characteristics in terms of sensitivity and stability. This work provided a new application of mixed metal oxides to ECL and bridged the inorganic mixed metal oxides and electrochemiluminescence.