Dual-Site Activation Coupling with a Schottky Junction Boosts the Electrochemiluminescence of Carbon Nitride

作者：Wu, Zhichao; Wen, Jing; Qin, Ying; Ling, Ling; Jiao, Lei; Zhang, Ruizhong; Luo, Zhen; Xi, Mengzhen; Hu, Liuyong^*; Gu, Wenling^*; Zhu, Chengzhou^*

来源：Angewandte Chemie - International Edition, 2023, 62(33).

DOI：10.1002/anie.202308257

• Carbon Nitride
• Dual Sites
• Electrochemiluminescence
• Schottky Junctions
• Synergistic Effects

Robust electrochemiluminescence (ECL) of carbon nitride (CN) requires efficient electron-hole recombination and the suppression of electrode passivation. In this work, Au nanoparticles and single atoms (AuSA+NP) loaded on CN serve as dual active sites that significantly accelerate charge transfer and activate peroxydisulfate. Meanwhile, the well-established Schottky junctions between Au NPs and CN act as electron sinks, effectively trapping over-injected electrons to prevent electrode passivation. As a result, the porous CN modified with AuSA+NP exhibits an enhanced and stable ECL emission, with a minimal relative standard deviation of 0.24 %. Furthermore, the designed ECL biosensor based on AuSA+NP-CN shows a remarkable performance in detecting organophosphorus pesticides. This innovative strategy has the potential to offer new insights into strong and stable ECL emission for practical applications.

• 单位
  天津大学; 武汉工程大学