Enhancing room-temperature NO₂ gas sensing performance based on a metal phthalocyanine/graphene quantum dot hybrid material.

ABSTRACT: Metal phthalocyanine (MPc) has a great saturation response value, but its low conductivity and slow response speed limit its practical application. A novel hybrid material composed of graphene quantum dots (GQDs) and metal phthalocyanine derivatives has been obtained. GQDs can be anchored onto the surface of MPc nanofibers through π-π stacking. The response to NO₂ can be significantly enhanced under certain component proportion matching, which is much better than their respective response to NO₂. The introduction of GQDs greatly increases the conductivity of phthalocyanine fibers, leading to a faster response of the hybrid material. In addition, the reproducibility, selectivity and stability of the hybrid materials are excellent, and the minimum response concentration can reach 50 ppb. Ultra-low-power laser irradiation was used to solve the problem of slow recovery of metal phthalocyanine. Overall, we present the advantages of combining MPc nanofibers with GQDs and pave a new avenue for the application of MPc-GQD hybrids in the gas sensing field.

SUBMITTER: Jiang W 

PROVIDER: S-EPMC8694729 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature