“…10–13 However, bulk g-C 3 N 4 suffers from poor charge separation, insufficient visible light absorption, and few catalytic sites, which significantly reduces the photocatalytic efficiency. 14–16 One of the prevailing approaches in photocatalytic studies involves the integration of g-C 3 N 4 nanosheets with other semiconductors to fabricate heterojunctions. However, the coupling of commonly used classic metal oxide semiconductors, including WO 3 and Fe 2 O 3 , consistently produces poor dimension matching, and charge separation is still constrained by the weak electron transport capacity.…”