Stacking‐Layer‐Number Dependence of Water Adsorption in 3D Ordered Close‐Packed g‐C3N4 Nanosphere Arrays for Photocatalytic Hydrogen Evolution

Abstract

Water adsorption capacity is a key factor to influence photocatalytic H2 evolution activity for polymeric g‐C3N4. Herein we report the synthesis of 3D ordered close‐packed g‐C3N4 nanosphere arrays (CNAs) to significantly enhance its water adsorption capacity. Through precisely controlling the average stacking‐layer‐number (ASLN) of nanospheres in CNAs, we reveal an interesting stacking‐layer‐number dependence of water adsorption in the newly designed CNAs in accelerating H2 evolution reaction, which can be attributed to the differences in adsorption surface areas and adsorption sites endowed by the point defect cavities in samples CNAs.