Working electrode for electrochemical onsite surface enhanced Raman scattering (SERS) spectrum in-situ cell as well as preparation method and application thereof
A working electrode, spectroscopic in-situ technology, used in Raman scattering, material excitation analysis, etc., can solve the problems of poor signal stability and reproducibility, and achieve improved accuracy and reliability, easy processing, stability and reproducibility. good effect
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[0037] Example 1:
[0038] (1) Put the ITO glass sheet with the resistance value of 100Ω in acetone, isopropanol and ultrapure water for 20 minutes, and then use deionized water and hydrogen peroxide (30wt%) with a volume ratio of 5:0.5:0.5 , Ammonia water (25wt%) mixed solution boiling treatment for 30min;
[0039] (2) Place the cleaned ITO glass sheet at 0.18mol·L -1 Soak in the APTMS aqueous solution for 12h, take it out, rinse with ultrapure water, blow dry with nitrogen, and then treat it at 100℃ for 30min;
[0040] (3) At room temperature, immerse the silanized ITO glass sheet into 0.45×10 -7 The diameter of mmol / L is 30-50nm in gold sol for 6 hours, and the metal nanoparticles are assembled on the surface of the silanized ITO glass sheet through the electrostatic interaction between the silanized surface protonated amino groups and the metal nanoparticles;
[0041] (4) Immerse the ITO glass sheet into 1mmol / L HAuCl 4 And 0.1mol / L NaClO 4 In the mixed solution composed, use CHI7...
Example Embodiment
[0042] Example 2:
[0043] (1) Place the ITO glass sheet with a resistance value of 100Ω in acetone, isopropanol and ultrapure water for 25 minutes, and then use deionized water and hydrogen peroxide (30wt%) with a volume ratio of 5:1:1 , Ammonia (25wt%) mixed solution boiling treatment for 35min;
[0044] (2) Place the cleaned ITO glass sheet at 0.20mol·L -1 Soak in the 3-MPTMS aqueous solution for 24h, take it out and rinse with ultrapure water, blow dry with nitrogen, and then treat it at 105℃ for 35min;
[0045] (3) At room temperature, immerse the silanized ITO glass sheet into 0.45×10 -7 The particle size of mmol / L is 50-70nm in gold sol for 10 hours. The metal nanoparticles are assembled on the surface of the silanized ITO glass sheet through the chemical bonding between the sulfhydryl groups on the silanized surface and the metal nanoparticles.
Example Embodiment
[0046] Example 3:
[0047] (1) Place the ITO glass sheet with the resistance value of 100Ω in acetone, isopropanol and ultrapure water for 15 minutes, and then use deionized water and hydrogen peroxide (30wt%) with a volume ratio of 5:2:2. , Ammonia (25wt%) mixed solution boiling treatment for 25min;
[0048] (2) Place the cleaned ITO glass sheet at 0.25mol·L -1 Soak in the 3-MPTMS aqueous solution for 1 hour, take it out, rinse with ultrapure water, blow dry with nitrogen, and then treat it at 110°C for 25min;
[0049] (3) At room temperature, immerse the silanized ITO glass sheet into 0.50×10 -7 The particle size of mmol / L is 50~70nm in silver sol for 12 hours, and the metal nanoparticles are assembled on the surface of the silanized ITO glass sheet through the electrostatic interaction between the silanized surface protonated amino groups and the metal nanoparticles.
[0050] The gold or silver sols in the foregoing embodiments were prepared by the citrate reduction method proposed...
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