Preparation method of ratiometric electrochemical uric acid sensor based on zinc-coordinated black phosphorus nanosheet composite and biological enzyme catalysis
A technology of zinc coordination and nanosheets, which is applied in the field of preparation of nanocomposite modified electrodes and ratiometric electrochemical biosensors, achieving the effects of strong practicability, novel design and good selectivity
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Embodiment 1
[0016] The preparation method of the ratiometric electrochemical uric acid sensor based on the UO / Zn-BPNSs / MB / CS@GCE sensing interface involved in this example and the schematic diagram of the principle of quantitative detection of uric acid are as follows figure 1 As shown, the specific steps are as follows:
[0017] Weigh 10 mg of black phosphorus crystals, add 25 mL of nitrogen-methylpyrrolidone, and stir magnetically for 10 minutes to form a uniform dispersion; add 2 mL of 1 mol / L zinc nitrate aqueous solution drop by drop, and stir well to form a homogeneous mixture; Ultrasonic treatment in the instrument for 5 minutes, continued ultrasonic treatment after cooling for 5 minutes, and repeated operation of "ultrasonic-cooling" 3 times; then transferred the mixed solution into an ultrasonic cleaner, and ultrasonically treated in a water bath for 6 hours to prepare zinc-coordinated black phosphorus nanosheets Zn -BPNSs;
[0018]Under magnetic stirring, add 1 mL of 0.1 mol / L ...
Embodiment 2
[0021] The preparation method of the ratiometric electrochemical uric acid sensor based on the UO / Zn-BPNSs / MB / CS@GCE sensing interface involved in this example and the schematic diagram of the principle of quantitative detection of uric acid are as follows figure 1 As shown, the specific steps are as follows:
[0022] Weigh 15 mg of black phosphorus crystals, add 30 mL of nitrogen-methylpyrrolidone, and stir magnetically for 10 minutes to form a uniform dispersion; add 3 mL of 1.2 mol / L zinc nitrate aqueous solution drop by drop, and stir well to form a homogeneous mixture; Ultrasonic treatment in the pulverizer for 6 minutes, continued ultrasonic treatment after cooling for 5 minutes, and performed "ultrasonic-cooling" repeated operations 4 times; then transferred the mixed solution into an ultrasonic cleaner, and ultrasonically treated in a water bath for 8 hours to prepare zinc-coordinated black phosphorus nanosheets Zn-BPNSs;
[0023] Under magnetic stirring, add 1.2 mL o...
Embodiment 3
[0026] The preparation method of the ratiometric electrochemical uric acid sensor based on the UO / Zn-BPNSs / MB / CS@GCE sensing interface involved in this example and the schematic diagram of the principle of quantitative detection of uric acid are as follows figure 1 As shown, the specific steps are as follows:
[0027] Weigh 20 mg of black phosphorus crystals, add 40 mL of nitrogen-methylpyrrolidone, and stir magnetically for 10 minutes to form a uniform dispersion; add 4 mL of 1.5 mol / L zinc nitrate aqueous solution drop by drop, and stir well to form a homogeneous mixture; Ultrasonic treatment in the pulverizer for 8 minutes, continued ultrasonic treatment after cooling for 5 minutes, and performed "ultrasonic-cooling" repeated operations 5 times; then transferred the mixed solution into an ultrasonic cleaner, and ultrasonically treated for 10 hours in a water bath to prepare zinc-coordinated black phosphorus nanosheets Zn-BPNSs;
[0028] Under magnetic stirring, 1.5 mL of 0...
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