Preparation method of organic phosphorus pesticide residue detection sensor based on copper/copper oxide nano-wires
A technology of copper oxide nanowires and detection sensors, applied in the direction of material electrochemical variables, etc., can solve the problem of low cost, achieve the effects of low cost, simplified steps, and reduced production cost
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Embodiment 1
[0021] Example 1 Preparation of copper nanowire / graphene / chitosan composite modified electrode and dynamic detection of methyl parathion.
[0022] A method for preparing an organophosphorus pesticide residue detection sensor based on copper / copper oxide nanowires, the method comprising the steps of:
[0023] (1) Preheat 20 mL of NaOH solution with a concentration of 15 mol / L to 60°C, and then add 1 mL of Cu(NO 3 ) 2 , 0.16mL ethylenediamine (EDA), 25uL concentration of 35wt% N 2 h 4 Solution, and continue to stir for 2h to get a cake-like bright red product floating in the solution; then wash the above-mentioned red product with ultrapure water and absolute ethanol in sequence, and centrifuge and disperse for 3 times to remove inorganic ions and water-soluble compounds as well as residual EDA and N 2 h 4 ; Finally, after ultrasonic dispersion with ultrapure water, dry to obtain Cu nanowire powder;
[0024] (2) Dissolving the red Cu nanowire powder in step (1) in absolute...
Embodiment 2
[0027] Example 2 Preparation of copper nanowire / graphene / chitosan composite modified electrode and dynamic detection of methyl parathion.
[0028] A method for preparing an organophosphorus pesticide residue detection sensor based on copper / copper oxide nanowires, the method comprising the steps of:
[0029] (1) Preheat 20 mL of NaOH solution with a concentration of 15 mol / L to 60°C, and then add 1 mL of Cu(NO 3 ) 2 , 0.16mL ethylenediamine (EDA), 25uL concentration of 35wt% N 2 h 4 Solution, and continue to stir for 2h to get a cake-like bright red product floating in the solution; then wash the above-mentioned red product with ultrapure water and absolute ethanol in sequence, and centrifugally disperse for 5 times to remove inorganic ions and water-soluble compounds as well as residual EDA and N 2 h 4 ; Finally, after ultrasonic dispersion with ultrapure water, dry to obtain Cu nanowire powder;
[0030](2) Dissolving the red Cu nanowire powder in step (1) in absolute e...
Embodiment 3
[0033] Example 3 Preparation of copper nanowire / graphene / chitosan composite modified electrode and dynamic detection of methyl parathion.
[0034] A method for preparing an organophosphorus pesticide residue detection sensor based on copper / copper oxide nanowires, the method comprising the steps of:
[0035] (1) Preheat 20 mL of NaOH solution with a concentration of 15 mol / L to 60°C, and then add 1 mL of Cu(NO 3 ) 2 , 0.16mL ethylenediamine (EDA), 25uL concentration of 35wt% N 2 h 4 solution, and continuously stirred for 2 hours to obtain a cake-like bright red product floating in the solution; then the above red product was washed with ultrapure water and absolute ethanol in sequence, and centrifugally dispersed for 4 times to remove inorganic ions and water-soluble compounds as well as residual EDA and N 2 h 4 ; Finally, after ultrasonic dispersion with ultrapure water, dry to obtain Cu nanowire powder;
[0036] (2) Dissolving the red Cu nanowire powder in step (1) in ...
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