2D/2D MoS2/g-C3N4 layered heterojunctions with enhanced interfacial electron coupling effect

1 T-2H MoS2 were successfully grown on g-C3N4 nanosheets by convenient two-step calcination and solvothermal process to create two dimensional (2D)/2D heterostructures. 1 T-2H MoS2 was parallelly grew on g-C3N4 nanosheets to form a stable interfacial heterojunction. Various characteristics confirm the formation of parallel 1 T-2H MoS2/g-C3N4 heterostructures. The heterostructures exhibited enhanced photo- and electro-chemical activities. The photocatalytic degradation of dyes and electrochemical performance characterization indicates sample 2.5%MCN with MoS2 of 2.5 wt% shows excellent photocatalytic activity, in which the degradation rate for rhodamine B (RhB) is 1.84 times compared with pure g-C3N4 nanosheets. Because the face-to-face contact between 1 T and 2H MoS2 and g-C3N4 forms strong interfacial electron coupling, the optical response range became broad, the photocurrent density increased, and the recombination rate of photogenerated electron and hole decreased. In addition, the formation of 1 T-2H MoS2/g-C3N4 parallel heterojunctions and photocatalytic degradation process are studied in detail. The result supplied an efficient approach for the exploration of g-C3N4 based photocatalyst.

Automated summary

T-2H MoS2 was successfully grown on g-C3N4 nanosheets through a convenient two-step calcination and solvothermal process, forming parallel 2D/2D heterostructures. The resulting heterostructures exhibited enhanced photo- and electro-chemical activities, with the 2.5%MCN sample showing excellent photocatalytic performance.