A dissolved oxygen sensor based on hot electron induced cathodic electrochemiluminescence at a disposable CdS modified screen-printed carbon electrode

作者：Zheng, Rui-Juan; Fang, Yi-Min; Qin, Su-Fang; Song, Jing; Wu, Ai-Hong; Sun, Jian-Jun^*

来源：Sensors and Actuators B: Chemical , 2011, 157(2): 488-493.

DOI：10.1016/j.snb.2011.05.005

• Cathodic electrochemiluminescence
• Screen printed carbon electrodes
• CdS nanoparticles
• Dissolved oxygen

Hot electron induced cathodic electrochemiluminescence (ECL) was found at a disposable CdS modified screen printed carbon electrodes (CdS-SPCEs) during cathodic pulse polarization. The ECL behavior of the modified electrode was investigated with two emissions located at 520 nm and 580 nm. The CdS-SPCEs show very stable and reproducible ECL signal. The ECL intensity was linear with the dissolved oxygen concentration in the range of 1.7-33 mg/L with a detection limit of 0.02 mg/L (S/N = 3). In addition, a possible mechanism for ECL behavior of the modified electrode was proposed. The developed method can be applied to detect the dissolved oxygen concentration or biochemical oxygen demand (ROD).

• 出版日期2011-10-20
• 单位福州大学