Reduced graphene oxide modified nickel foam-based quaternary layered double hydroxides nanosheets as catalysts for vaporized hydrogen peroxide decomposition

Abstract

Vaporized hydrogen peroxide (VHP) is extensively utilized as a disinfectant. However, long-term exposure to VHP poses serious health risks to humans, necessitating the development of efficient VHP catalytic materials. Herein, reduced graphene oxide modified nickel foam-based quaternary layered double hydroxides nanosheets (LDHs/rGO/NF) were prepared for VHP decomposition. Comprehensive material characterizations confirm the successful fabrication of the LDHs/rGO heterogeneous structure. The LDHs/rGO/NF catalyst exhibits superior catalytic activity compared to LDHs/NF and rGO/NF and the VHP concentration is reduced to 1 ppm within 34 min. The enhanced VHP decomposition efficiency originates from the synergistic effect of LDHs and rGO. The electron transfer from rGO to LDHs is evidenced by electrochemical measurements. The introduction of rGO into LDHs/NF improves the reduction capacity of the catalyst, thus accelerating the redox cycle during VHP decomposition. Moreover, the LDHs/rGO/NF catalyst exhibits exceptional stability in multiple recycling tests, highlighting its potential application in the field of VHP disinfection.