Realizing a strong visible-light absorption band in piezoelectric 2D carbon nitride sheets for enhanced piezocatalysis

Unconventional strategies to break through the efficiency of light‐driven water splitting: A review

“…In 2022, Yang et al reported a 2D carbon-based photocatalyst for water splitting, Pt-CNs (corresponding to Model 2), which exhibit piezoelectric effects and high visible light absorption capabilities. 94 Compared to the photocatalyst without Pt modification, as shown in Figure 9B,C, the Pt-modified CN photocatalysts demonstrate an exceptional hydrogen evolution performance under simultaneous visible-light exposure and the ultrasonic irradiation. In this type of piezoelectric-assisted photocatalyst structure, the surface-modified metal co-catalyst can effectively collect the photo-generated charges separated by the induced piezoelectric field and provide active sites for the water splitting reaction.…”

“…In 2022, Yang et al. reported a 2D carbon‐based photocatalyst for water splitting, Pt‐CNs (corresponding to Model 2), which exhibit piezoelectric effects and high visible light absorption capabilities 94 . Compared to the photocatalyst without Pt modification, as shown in Figure 9B,C, the Pt‐modified CN photocatalysts demonstrate an exceptional hydrogen evolution performance under simultaneous visible‐light exposure and the ultrasonic irradiation.…”

“… (A) Hydrogen production of the piezoelectric CdS nanosheets at different conditions Reproduced with permission 86 . Copyright 2019, Royal Society of Chemistry., hydrogen production of the piezoelectric CNs photocatalysts (B) without Pt cocatalysts and (C) with Pt cocatalysts at different conditions, Reproduced with permission 94 . Copyright 2022, Elsevier.…”

Intrinsic piezoelectricity of 2D violet phosphorene

“…The specified A.C. voltage was supplied to the VP nano-sheets in a vertical direction coupled with the electric field that has a spherical symmetry component along the in-plane axis. 43,44 Therefore, using this approach to measure various piezoelectric responses were acceptable. The local oscillations of the piezoelectric excitation below the probe tip were detected to acquire the out-ofplane vertical and in-plane horizontal PFM responses.…”

Tribocatalysis mechanisms: electron transfer and transition

“…Currently, there is burgeoning interest in research on the realization of chemical reactions by harvesting mechanical energy in the environment through piezocatalysis and tribocatalysis. Piezoelectric materials generate a piezoelectric potential difference in response to mechanical force and catalyze chemical reactions, [1][2][3][4] thereby enabling water splitting and degradation of organic pollutants, which is termed as piezocatalysis. 5 Similarly, the triboelectric effect generated by mechanical energy that drives catalytic reactions is called tribocatalysis.…”