▎ 摘　　要

NOVELTY - Preparing organo phosphorus pesticide detection sensor based on copper/copper oxide nano wires comprises e.g. preheating sodium hydroxide, adding copper(II) nitrate, ethylenediamine and hydrazine solution, washing, centrifuging, dissolving in absolute ethanol, adding graphene powder and graphene dispersion, adding sodium dodecyl sulfate solution, taking modified electrode as a working electrode, silver/silver chloride as a reference electrode, platinum wire electrode as a counter electrode, adding disodium hydrogen phosphate-citric acid buffer solution to obtain final product. USE - The method is useful for preparing organo phosphorus pesticide detection sensor based on copper/copper oxide nano wires (claimed). ADVANTAGE - The method has excellent catalytic performance, excellent sensing performance, specific affinity and specific detection to organic phosphorus pesticide, simple detection method, sensitive and convenient, besides, step of forming composite material with excellent chitosan modified on the surface of the electrode is more simplified and greatly reduces preparation cost of electrode, single-wall carbon nano tube to organic phosphorus pesticide residue effectively adsorb on the surface of the electrode material, and forming a layer of barrier preventing electronic transmission to realize the detection of the pesticide. DETAILED DESCRIPTION - Preparing organo phosphorus pesticide detection sensor based on copper/copper oxide nano wires comprises (i) preheating 15 mol/l 20 ml sodium hydroxide at 60 degrees C, adding 0.1 mol/l 1 ml copper(II) nitrate, 0.16 ml ethylenediamine and 25 ul 35 wt.% hydrazine solution, continuing stirring for 2 hours to obtain cake-type bright red product floating in solution, washing with ultrapure water and anhydrous ethanol, centrifuging and dispersing for 3-5 times, removing inorganic ions and aqueous-soluble compounds and residual ethylenediamine and hydrazine, ultrasonically dispersing with ultrapure water and drying to obtain copper nanowire powder, (ii) adding red copper nanowire powder obtained in step (i) in vacuo after containing the foil paper, and adding into the muffle furnace, raising the temperature to 400 degrees C at a heating rate of 20-40 degrees C/minutes, and calcining at high temperature for 5-8 hours and cooling to obtain black copper(II) oxide nanowire powder, (iii) dissolving the red copper nanowire powder obtained in step (i) in absolute ethanol to obtain copper nanowire suspension with a concentration of 2 mg/ml, ultrasonic dispersing 10 mg graphene powder, preparing 5 ml concentration of 0.05 wt.% chitosan solution and 2 mg/ml graphene dispersion, mixing copper nanowire suspension and graphene dispersion in a volume ratio of 1:0.5-2, ultrasonic treating for 30-60 minutes to obtain copper nanowire/graphene/chitosan complex dispersion, (v) dissolving black copper(II) oxide nanowire powder obtained in step (ii) in absolute ethanol to obtain 2 mg/ml copper(II) oxide nanowire suspension, taking 4-6 mg single-walled carbon nanotube powder, ultrasonic dispersing in 10 ml 0.05 wt.% sodium dodecyl sulfate solution and 0.4-0.6 mg/ml single-walled carbon nanotube dispersion, mixing copper(II) oxide nanowire suspension and single-walled carbon nanotube dispersion in a volume ratio of 1:0.4-2, ultrasonic treating for 30-60 minutes to obtain copper oxide nanowire/single-walled carbon nanotube composite dispersion, (v) polishing the glassy carbon electrode, washing and drying, and adding copper nanowire/graphene/chitosan composite dispersion or copper oxide nanowire/single-walled carbon nanotube composite dispersion obtained in step (iv) into treated glassy carbon electrode surface dropwise, reacting at room temperature conditions, evaporating the electrode surface and drying to obtain copper nanowire/graphene/chitosan composite modified electrode or copper oxide nanowire/single-walled carbon nanotube composite modified electrode, and (vi) taking the modified electrode obtained in step (v) as a working electrode, silver/silver chloride as a reference electrode, platinum wire electrode as a counter electrode, adding 5 ml 0.1 mol/l disodium hydrogen phosphate-citric acid buffer solution at room temperature to obtain final product.