Manufacturing method of graphene-porphyrin modified electrode and application of electrode
A technology for modifying electrodes and graphene, applied in the direction of material electrochemical variables, etc., can solve the problems of high price, long time-consuming, cumbersome operation of ascorbic acid content method, etc., achieve efficient detection, solve the effect of easy falling off and agglomeration
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specific Embodiment approach 1
[0022] Specific embodiment one: the preparation method of the graphene-porphyrin modified electrode of the present embodiment is specifically carried out according to the following steps:
[0023] 1. Mix 6g natural flake graphite, 5g K 2 S 2 o 8 and 5g P 2 o 5 Mix well, add 24mL concentrated H to the system 2 SO 4 , and then reacted in an oil bath at a temperature of 80° C. for 4.5 hours under stirring conditions to obtain pre-oxidized graphite;
[0024] 2. Cool concentrated sulfuric acid with a volume of 23mL and a mass concentration of 98% to 3.5°C to 5°C with an ice-water bath, and then add 1g of pre-oxidized graphite obtained in step 1 and 3.5g of KMnO under stirring conditions 4 , control the temperature of the system at 4°C to 6°C, then remove the ice-water bath, control the temperature at 35°C, stir for 2 hours, then add 90mL of distilled water, raise the temperature to 98°C and continue to stir for 15min, then dilute with 75mL of distilled water, then add 10 mL ...
specific Embodiment approach 2
[0032] Embodiment 2: This embodiment differs from Embodiment 1 in that the temperature of the distilled water used for dilution in step 2 is 20° C. to 35° C. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0033] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the reaction time in step four is 90min. Others are the same as in the first embodiment.
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