▎ 摘　　要

NOVELTY - A cobalt-iron-oxide nanowires/reduction-oxidation graphene nano composite material preparing method involves placing an oxidized graphene into a water to obtain solution. The solution is added into citric acid for 10-60 minutes to obtain an oxidized graphene dispersion liquid. The oxidized graphene dispersion liquid is added with iron(III) chloride hexahydrate and cobalt(II) chloride hexahydrate, and sonicated. The pH value is adjusted to 9.5-10.5, followed by adding hydrazine into the solution, stirring and aging. The solution is centrifuged, washed and dried to obtain finished product. USE - Method for preparing a cobalt-iron-oxide nanowires/reduction-oxidation graphene nanometre composite material for use in paracetamol chemical electrode that is utilized in acetaminophen electrochemical sensor (all claimed). ADVANTAGE - The method enables preparing the cobalt-iron-oxide nanowires/reduction-oxidation graphene nanometre composite material with high sensitivity and selectivity, and better stability, in a rapid manner. DETAILED DESCRIPTION - A cobalt-iron-oxide nanowires/reduction-oxidation graphene (CoFe2O4NWs/RGO) nano composite material preparing method involves placing an oxidized graphene into a water for 10-30 minutes to obtain solution. The solution is added with citric acid for 10-60 minutes to obtain an oxidized graphene dispersion liquid. The oxidized graphene dispersion liquid is added with iron(III) chloride hexahydrate and cobalt(II) chloride hexahydrate, and sonicated for 10-60 minutes. The pH value is adjusted to 9.5-10.5, followed by adding hydrazine into the solution, stirring for 30-120 minutes and aging for 18-48 hours. The solution is centrifuged, washed and dried to obtain finished product.