Tube-shaped g-C3N4 for enhanced piezocatalytic H2 evolution

Abstract

Tube-shaped g-C3N4 was synthesized via a combined hydrothermal and thermal polymerization strategy using melamine and urea as co-precursors. Owing to morphology-enhanced piezoelectric polarization and improved charge separation, the tubular catalyst exhibits a high piezocatalytic H2 evolution rate of 2014.7 μmol•g -1 •h - 1 under ultrasonic stimulation, corresponding to a 2.7-fold enhancement over intrinsic two-dimensional g-C3N4 nanosheets.