A specific modified electrode based on metal organic framework and its preparation and application
A metal-organic framework and metal-organic framework technology, applied in the direction of material electrochemical variables, material analysis through electromagnetic means, instruments, etc., can solve problems such as limiting sensor applications, and achieve fast and simple detection methods, good anti-interference and stability sexual effect
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Embodiment 1
[0043] Example 1, Au / NH 2 -Cu 3 (btc) 2 - Construction of rGO / GCE
[0044] (1) NH 2 -Cu 3 (btc) 2 Preparation: Take 1.22g of copper nitrate and add it to 8.5mL of ionized water; take 0.58g of trimesic acid and 0.18g of 2-aminoterephthalic acid, add it to 17mL of a mixture of N,N-dimethylformamide and ethanol Medium (8.5mL each). Stir under magnetic force for 0.5h; transfer the solution to a steel autoclave lined with polytetrafluoroethylene, keep the reaction temperature at 85°C for 24h, cool to room temperature, filter, and wash with N,N-dimethylformaldehyde Amide and ethanol washed, dried in vacuo at 60 °C to give NH 2 -Cu 3 (btc) 2 ;
[0045] (2) Preparation of rGO: Add 300 mg GO to 100 mL H 2 In a round-bottomed flask of O, ultrasonically disperse for 2 h, put 3 mL of N 2 h 4 Added to the suspension, and the suspension was stirred at 95°C for 24h, cooled to room temperature, filtered and washed with deionized water and ethanol respectively, and the product was...
Embodiment 2
[0048] Example 2, Au / NH 2 -Cu 3 (btc) 2 - rGO / GCE electrochemical sensor for simultaneous detection of acetaminophen and p-aminophen
[0049](1) Preparation of sample solution: Weigh 37.8 mg of paracetamol and 27.3 mg of paracetamol respectively, and adjust the volume to 25 mL with a phosphate buffer solution with a pH of 8, that is, the prepared concentration is 1×10 -2 Mother liquor of M. Pipette 0.25 mL of the mother liquor for dilution to prepare a sample solution with a paracetamol concentration of 100 μM and a paraaminophen concentration of 100 μM;
[0050] (2) Detection of acetaminophen and p-aminophenol: Au / NH prepared in Example 1 2 -Cu 3 (btc) 2 - rGO / GCE modified electrode, platinum electrode and saturated calomel electrode are three-electrode system, put in phosphate buffer solution (pH=8) containing acetaminophen and p-aminophenol, and scan by differential pulse voltammetry , the scanning potential range is -0.3~0.7V;
[0051] (3) Test results: According t...
Embodiment 3
[0052] Example 3, Au / NH 2 -Cu 3 (btc) 2 - rGO / GCE electrochemical sensor for simultaneous detection of acetaminophen and p-aminophen
[0053] (1) Preparation of sample solution: Weigh 37.8 mg of paracetamol and 27.3 mg of paracetamol respectively, and adjust the volume to 25 mL with a phosphate buffer solution with a pH of 8, that is, the prepared concentration is 1×10 -2 Mother liquor of M. Pipette 0.5mL of the mother liquor for dilution to prepare a sample solution with acetaminophen concentration of 200 μM and para-aminophen concentration of 200 μM;
[0054] (2) Detection of acetaminophen and p-aminophenol: Au / NH prepared in Example 1 2 -Cu 3 (btc) 2 - rGO / GCE modified electrode, platinum electrode and saturated calomel electrode are three-electrode system, put in phosphate buffer solution (pH=8) containing acetaminophen and p-aminophenol, and scan by differential pulse voltammetry , the scanning potential range is -0.3~0.7V;
[0055] (3) Test results: According to ...
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