Photogated proton conductivity of ZIF-8 membranes co-modified with graphene quantum dots and polystyrene sulfonate

Smart proton conductive metal-organic framework (MOF) membranes with dynamic remote control over conduction show high potential for use in advanced applications, such as sensors and bioprocesses. Here, we report a photoswitchable ZIF-8 membrane by coencapsulating polystyrene sulfonate graphene quantum dots into matrix (GQDs-PSS@ZIF-8) via solid-confined conversion process. The conductivity of the GQDs-PSS@ZIF-8 is 6.3 times higher than that pristine can be reversibly switched light due to photoluminescence quenching photothermal effect, which converts heat. local increase temperature allows water molecules escape from porous channels, cuts off transport pathways results decrease conductivity. restored when owing regaining molecules, act carriers, surroundings. responds efficiently exhibits an ON/OFF ratio 12.8. This photogated MOFs has development application MOF-based protonic solids photoelectric devices.