High-flexibility all-solid-state sulfur ion selective electrode and preparation method thereof
A selective, all-solid-state technology, applied in electrolytic coatings, material electrochemical variables, electrolytic inorganic material coatings, etc., can solve problems such as inability to adapt to detection, achieve strong application and promotion value, simple preparation process, and achieve the effect of continuity
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Embodiment 1
[0035] All solid-state pH ion selective electrode:
[0036] a. Platinum wire electrodes with high flexibility as supporting structures;
[0037] b. Using electrodeposition to deposit graphene oxide on the surface of the metal electrode to form a layered structure that acts as a capacitor;
[0038] The layered structure is that graphene oxide (GO) is mixed with PBS (phosphate buffer) at a volume ratio of 1:1.5; then the layered structure is deposited on the surface of a metal electrode by electrodeposition; wherein, graphene oxide ( GO) concentration at 0.3mg.mL -1 , PBS (phosphate buffer solution), the concentration of which is 50 mM, the pH value is 7-8, and the deposition is for 1 h.
[0039] c. Put the deposited graphene electrode into the prepared electrodeposition solution, and prepare a sulfide ion selective membrane by means of electrodeposition technology.
[0040] The sulfide ion selective membrane is obtained by immersing a graphene electrode deposited with a laye...
Embodiment 2
[0049] The difference from Example 1 is that the preparation method:
[0050] a Cut off the platinum wire, each section is about 10cm long. Grind and polish with 2000 mesh sandpaper, soak and rinse the electrode with deionized water to remove surface powder.
[0051] b. Put the polished platinum wire into the electrolytic cell, and the concentration of the electrolyte is 2mg.ml -1 Graphene oxide was mixed with PBS at a concentration of 50 mM at a volume ratio of 1:2, and graphene was deposited by cyclic voltammetry. Deposition parameters: the scanning voltage is from -3V to 0V, the scanning speed is 50mV / s, the number of scanning segments is 10cycles, and the deposition time is 1h, thus obtaining a graphene electrode deposited from graphene on the surface of platinum wire.
[0052] c. the obtained graphene electrode is immersed in the mixed solution and electrodeposited (see figure 1 ). The mixed solution is formed by complexing the precursor with EDTA; the precursor is 0....
Embodiment 3
[0054] The difference from Example 1 is that the preparation method:
[0055] a Cut off the platinum wire, each section is about 10cm long. Grind and polish with 2000 mesh sandpaper, soak and rinse the electrode with deionized water to remove surface powder.
[0056] b. Put the polished platinum wire into the electrolytic cell, and the concentration of the electrolyte is 3mg.ml -1 Graphene oxide was mixed with 100 mM PBS at a volume ratio of 1:1.5, and graphene was deposited by cyclic voltammetry. Deposition parameters: the scanning voltage is from -2V to 1V, the scanning speed is 25mV / s, the number of scanning segments is 8cycles, and the deposition time is 1h, thus obtaining a graphene electrode deposited from graphene on the surface of platinum wire.
[0057] c. the obtained graphene electrode is immersed in the mixed solution and electrodeposited (see figure 1 ). The mixed solution is formed by complexing the precursor with EDTA; the precursor is 0.03M AgF and 0.06M Na...
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