Reusable sensor based on high magnetization carboxyl-modified graphene oxide with intrinsic hydrogen peroxide catalytic activity for hydrogen peroxide and glucose detection

► This paper presents a high sensitivity and selectivity sensor for H2O2 and glucose detection. ► This sensor has intrinsic hydrogen peroxide catalytic activity. ► This paper presents a conveniently reusable sensor platform based on high magnetic graphene oxide. ► Such an accurate sensor opens a route in potential clinical, environmental and industrial applications.