▎ 摘　　要

Novel amine modified graphene oxide (APTES-GO) was prepared using organo silane (aminopropyltrimethoxysilane, APTES) and the material was fully characterized by PXRD, Raman, SEM, FTIR, and TEM: Successful grafting of the amine group over the graphene oxide (GO) surface was confirmed by FT-IR and TEM data. APTES-GO as heterogeneous catalyst demonstrated impressive activity for solvent-free Knoevenagel condensation reaction producing cinnamic acid with excellent conversion (94%) and selectivity (99%) at RT. The catalytic activity remained almost unchanged for four cycles and in fifth cycle conversion was 9% less. (C) 2016 Elsevier B.V. All rights reserved.