Electrogenerated Chemiluminescence Behavior of Graphite-like Carbon Nitride and Its Application in Selective Sensing Cu2+

详细信息    查看全文

• 作者：Changming Cheng ; Ying Huang ; Xianqing Tian ; Baozhan Zheng ; Yi Li ; Hongyan Yuan ; Dan Xiao ; Shunping Xie ; Martin M. F. Choi
• 刊名：Analytical Chemistry
• 出版年：2012
• 出版时间：June 5, 2012
• 年：2012
• 卷：84
• 期：11
• 页码：4754-4759
• 全文大小：325K
• 年卷期：v.84,no.11(June 5, 2012)
• ISSN：1520-6882

文摘

This paper reports for the first time the electrogenerated chemiluminescence (ECL) behavior of graphite-like carbon nitride (g-C₃N₄) with K₂S₂O₈ as the coreactant. The possible ECL reaction mechanisms are proposed. The spectral features of the ECL emission and photoluminescence (PL) of g-C₃N₄ are compared, and their resemblance demonstrates that the excited states of g-C₃N₄ from both ECL and photoexcitation are the same. The effects of K₂S₂O₈ concentration, pH, g-C₃N₄/carbon powder ratio, and scan rate on the ECL intensity have been studied in detail. Furthermore, it is observed that the ECL intensity is efficiently quenched by trace amounts of Cu²⁺. g-C₃N₄ is thus employed to fabricate an ECL sensor which shows high selectivity to Cu²⁺ determination. The limit of detection is determined as 0.9 nM. It is anticipated that g-C₃N₄ could be a new class of promising material for fabricating ECL sensors.