1 research outputs found
Facile Fabrication of Large-Aspect-Ratio g‑C<sub>3</sub>N<sub>4</sub> Nanosheets for Enhanced Photocatalytic Hydrogen Evolution
Exfoliation
of bulk graphitic carbon nitride (BCN) into two-dimensional
(2D) nanosheets is one of the effective strategies to improve its
photocatalytic performance. Compared with BCN, the 2D g-C<sub>3</sub>N<sub>4</sub> nanosheets (CNNS) have larger specific surface areas
and more reaction sites. With the etching assistance of anhydrous
ethylenediamine, BCN can be successfully peeled off into 2D CNNS with
a large lateral size of more than 15 μm which is much larger
than that of other works. After appropriate etch by anhydrous ethylenediamine,
the specific surface area of g-C<sub>3</sub>N<sub>4</sub> expands
from 4.7 to 31.1 m<sup>2</sup> g<sup>–1</sup> and the photocatalytic
hydrogen evolution rate increases 7.4 times, from 4.8 to 35.3 μmol
h<sup>–1</sup>. In contrast to other reported methods, the
strategy to fabricate 2D CNNS in this work is convenient and it is
the first time to report the fabrication of 2D CNNS with the assistance
of alkaline reagent