Hydrogen bonding could lead to strong blue photoluminescence of the exfoliated LDH nanosheets.
LDH nanosheets can induce a significant increase in the CL intensity of TCPO–H2O2 system.
Biogenic amines can selectively inhibit CL intensity of TCPO–H2O2 system.
The proposed method has been applied to trace biogenic amine evolution of spoiled foods.