Preparation method and application of electrochemiluminescence-excitation-based hydrogen peroxide photoelectrochemical sensor
A photoelectrochemical and hydrogen peroxide technology, applied in chemiluminescence/bioluminescence, electrochemical variables of materials, analysis by chemical reaction of materials, etc., can solve problems such as limiting wide application and affecting convenience of operation, etc. Achieve the effect of high selective detection, convenient operation and broad market development prospects
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Embodiment 1
[0038] Example 1 A hydrogen peroxide photoelectrochemical sensor based on electrochemiluminescence excitation, the specific preparation steps are:
[0039] (1) Preparation of ECL working electrode W1:
[0040] 1) Use ITO conductive glass as the working electrode, and drop-coat NH on the surface of the electrode 4 NiPO 4 Solution, covering an area of 1cm × 1cm, dry at room temperature;
[0041] 2) Apply the working electrode obtained in 1) to the NH 4 NiPO 4 Drop-coat AuNRs on the surface, covering an area of 1cm×1cm, and dry at room temperature;
[0042] 3) Immerse the working electrode obtained in 2) into the electrolyte, and the immersion area is NH 4 NiPO 4 The area covered by AuNRs was electrochemically deposited on the working electrode using a three-electrode system. After deposition, the working electrode was taken out, washed with ultrapure water, and dried at 4°C in the dark to prepare the electrochemiluminescent working electrode W1;
[0043] The NH 4 N...
Embodiment 2
[0061] Example 2 A hydrogen peroxide photoelectrochemical sensor based on electrochemiluminescence excitation, the specific preparation steps are:
[0062] (1) Preparation of ECL working electrode W1:
[0063] The preparation steps are the same as the preparation steps of W1 in Example 1, the difference is: the ammonium salt addition is 0.3g in the preparation step of the nickel ammonium phosphate micro-nano material, the phosphate addition is 0.20g, and the nickel dichloride addition is 0.20g, the stirring temperature and time were 38°C and 12h respectively; the length of gold nanorods was 30nm; the concentration of luminol in the electrolyte was 5mmol / L, and the concentration of sulfuric acid was 0.5mol / L; During deposition, cycle 25 times.
[0064] (2) Preparation of photoelectrochemical working electrode W2:
[0065] 1) Using ITO conductive glass as the working electrode, drop-coat 10 μL TiO on the surface of the electrode 2 NSs, dry at room temperature;
[0066] 2) ...
Embodiment 3
[0071] Example 3 A hydrogen peroxide photoelectrochemical sensor based on electrochemiluminescence excitation, the specific preparation steps are:
[0072] (1) Preparation of electrochemiluminescence working electrode W1:
[0073] The preparation steps are the same as the preparation steps of W1 in Example 1, the difference is: the ammonium salt addition is 0.4g in the preparation step of the nickel ammonium phosphate micro-nano material, the phosphate addition is 0.25g, and the nickel dichloride addition is 0.25g, the stirring temperature and time were 45°C and 14h, respectively; the length of gold nanorods was 40nm; the concentration of luminol in the electrolyte was 10mmol / L, and the concentration of sulfuric acid was 1.0mol / L; During deposition, cycle 30 times.
[0074] (2) Preparation of photoelectrochemical working electrode W2:
[0075] 1) Using ITO conductive glass as the working electrode, drop-coat 12 μL TiO on the surface of the electrode 2 NSs, dry at room tem...
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