Abstract: Biochar materials impregnated with cerium oxide nanoparticles were prepared by pyrolysis of $ Jerusalem $ artichoke straw (JAS) impregnated with cerium nitrate solution. The physical and chemical properties of $ CeO_{2}/JAS $ were characterized, and its potential for electrochemical applications was described. The biochar material was modified on the gate of the solution-gated graphene field-effect transistor (SGGT) to detect the pigment in the simulated soft drink system, and the response to sunset yellow was the best. The limit of detection of sunset yellow is 300 nmol/L, and the slope of sensitivity curve is 29.2. A series of experimental results demonstrated that $ CeO_{2}/JAS $ material can improve the detection performance of sunset yellow. This study provides reference for the application of the material in the field of electrochemistry, and is of significance for the reuse of agricultural waste resources and food safety detection.
Keywords: Jerusalem artichoke straw(JAS); pyrolysis; nanomaterials; electrochemistry; solution-gated graphene field-effect transistor(SGGT); sunset yellow