Fabrication And Application Of Graphene Composite Metal Oxide Sensor Based On Laser Induction Technology

Due to the continuous progress of industry to ensure the quality of life level,so in industrial production and life will inevitably use the isomer of resorcinol,including hydroquinone(HQ),catechol(CC)and resorcinol(RS),they have the same molecular structure,and serious threat to human health and even survival,A quick and accurate test is needed to ensure that the drugs are being used properly.In this paper,we propose a laser-induced graphene technology,which enhances the physical and chemical properties of graphene by doping.With graphene oxide(GO),manganese gluconate(MG)and polyvinyl alcohol(PVA)as raw materials,we use a simple,efficient and low-cost laser-induced graphene oxide and manganese gluconate.Manganese oxide/reduced graphene oxide(Mn O_x/rGO)composites were prepared.It was characterized by transmission electron microscopy,high resolution confocal laser Raman spectrometer and X-ray diffraction analysis.The working electrode of the screen printing electrode was modified,and the laser induced screen printing electrode was used to detect hydroquinone(HQ)and catechol(CC).The cyclic voltammetry(CV)was used to simultaneously characterize the electrochemical behavior of HQ and CC in the potential range of-0.2 V to 0.6 V.The linear response ranges of 0.5-200μM and the detection limits(LOD)of HQ and CC were 0.049μM and 0.028μM,respectively.The differential pulse voltammetry(DPV)technique with recovery value was used to detect hydroquinone and catechol in harmful water pollutants.Cu/Mn O_x/rGO nanocomposites were fabricated by laser by adding copper acetate.Subsequent electrode for resorcinol(RS)detection,CV and DPV technology in the potential range of-0.4 V to 1.0 V and detection of resorcinol,linear response range of 0.5-300μM,resorcinol LOD is 0.0298μM,in addition,DPV technology is good for HQ,CC and RS simultaneously detection.And it makes a good distinction between the three.Laser engraving electrode is easy to carry,easy to detect,and the electrode surface after laser engraving machine processing becomes very fit screen printing electrode,so it will not easily fall off,and the production of this electrode is low cost,simple and easy to batch manufacture.