Intrinsic Mechanisms of Morphological Engineering and Carbon Doping for Improved Photocatalysis of 2D/2D Carbon Nitride Van Der Waals Heterojunction

Van der Waals (VDW) heterojunctions in a 2D/2D contact provide the highest area for separation and transfer of charge carriers. In this work, top-down strategy with gas erosion process was employed to fabricate carbon nitride VDW heterojunction (g-C3N4) carbon-rich nitride. The created 2D semiconducting channel structure exhibits enhanced electric field exposure radiation absorption, which facilitates carriers their mobility. Consequently, compared bulk g-C3N4 its nanosheets, photocatalytic performance fabricated water splitting reaction hydrogen is improved by 8.6 3.3 times, respectively, while maintaining satisfactory photo-stability. Mechanistically, finite element method (FEM) evaluate clarify contributions formation photocatalysis, agreement quantitatively experimental ones. This study provides new effective modification more insights improvement on polymeric semiconductors photocatalysis energy conversion.