Enhanced spatial charge separation at surface & interface via GO/MoS2/ Ag3PO4 ternary Z-scheme heterostructure for nitrogen photo-fixation

Enhancing spatial charge separation is an efficient strategy for the improvement of photocatalytic performance. Herein, an ammonia synthesis approach was proposed with an in-situ grown ternary GO/MoS2/ Ag3PO4 Z-scheme heterostructure photocatalytic system to promote spatial charge separation at surface & interface. Owing to the decent electrical and thermal conductivity properties of GO, ternary photocatalyst delivered evidently enlarged surface area, promoted spatial charges separation and significantly enhanced N-2 photo-fixation efficiency under irradiation of visible light. Through the synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on heterojunction, the transportation and separation of photo-generated charges can be realized on both surface and interface, leading to better harvest and utilization of light illumination. The possible Z-scheme heterostructure mechanism for N-2 photo-fixation reaction was explored, which not only offers a new approach for design of heterostructure photocatalysis system but also provides a novel strategy for enhanced spatial charges separation.

Automated summary

Enhancing spatial charge separation is an efficient strategy for improving photocatalytic performance. In this study, a ternary GO/MoS2/Ag3PO4 Z-scheme heterostructure photocatalytic system was proposed to promote spatial charge separation at the surface and interface. The ternary photocatalyst exhibited enlarged surface area and improved N-2 photo-fixation efficiency under visible light irradiation, thanks to the decent properties of GO. The synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on the heterojunction enabled the transportation and separation of photo-generated charges, leading to better harvest and utilization of light illumination.