Application of Electrode Material for Enzyme-free Electrochemical Glucose Sensor
A technology of glucose sensor and electrode material, applied in the field of preparation of non-enzymatic glucose sensor, can solve the problems of being susceptible to other interfering substances, narrow linear range and limitation of non-enzymatic glucose detection, and achieve high detection sensitivity, good anti-interference performance, Simple preparation process
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Embodiment 1
[0062] Ni-doped pyrite-type FeS 2 The preparation method of enzyme-free glucose electrochemical sensor comprises the following steps:
[0063] (1) 20% Ni-doped pyrite-type FeS 2 Preparation of electrode materials:
[0064] First weigh 1.176g of sodium citrate and 0.8g of polyvinylpyrrolidone into 120ml of deionized water, stir for 10 minutes to dissolve; then add 0.474g of NiCl 2 ·6H 2 O, 2.224 g FeSO 4 ·7H 2 O (Ni / (Ni+Fe) molar ratio is equal to 20%), 20ml NaOH solution (1.4M), 0.96 grams of sulfur powder were added to the above solution, stirred for 30 minutes to obtain a mixed solution; secondly, the mixed solution was moved to an autoclave React at 200°C for 24h; after the reaction is completed, cool to room temperature, wash the product three times with deionized water, and dry at 80°C for 6 hours to obtain 20% Ni-doped FeS 2 powder.
[0065] (2) 20% Ni-doped FeS described in step (1) 2 The powder is ultrasonically dispersed in polyvinyl alcohol solution, and then...
Embodiment 2
[0070] Ni-doped pyrite-type FeS 2 The preparation method of enzyme-free glucose electrochemical sensor comprises the following steps:
[0071] (1) 10% Ni-doped pyrite-type FeS 2 Preparation of electrode materials:
[0072] First weigh 1.176g of sodium citrate and 0.8g of polyvinylpyrrolidone into 120ml of deionized water and stir for 10 minutes to dissolve; then add 0.237g of NiCl 2 ·6H 2 O, 2.502 g FeSO 4 ·7H 2 O (Ni / (Ni+Fe) molar ratio is equal to 10%), 20ml NaOH solution (1.4M), 0.96 grams of sulfur powder were added to the above solution, stirred for 30 minutes to obtain a mixed solution; secondly, the mixed solution was moved to an autoclave React at 200°C for 24 hours; after the reaction, cool to room temperature, wash the product three times with deionized water, and dry at 80°C for 6 hours to obtain 10% Ni-doped FeS 2 powder.
[0073] (2) 10% Ni-doped FeS described in step (1) 2 The powder is ultrasonically dispersed in polyvinyl alcohol solution, and then the ...
Embodiment 3
[0078] Ni-doped pyrite-type FeS 2 The preparation method of enzyme-free glucose electrochemical sensor comprises the following steps:
[0079] (1) 5% Ni-doped pyrite-type FeS 2 Preparation of electrode materials:
[0080] First weigh 1.176g of sodium citrate and 0.8g of polyvinylpyrrolidone into 120ml of deionized water and stir for 10 minutes to dissolve; then add 0.1185g of NiCl 2 ·6H2 O, 2.641 g FeSO 4 ·7H 2 O (Ni / (Ni+Fe) molar ratio is equal to 5%), 20ml NaOH solution (1.4M), 0.96 grams of sulfur powder were added to the above solution, stirred for 30 minutes to obtain a mixed solution; secondly, the mixed solution was moved to an autoclave React at 200°C for 24 hours; after the reaction, cool to room temperature, wash the product three times with deionized water, and dry at 80°C for 6 hours to obtain 5% Ni-doped FeS 2 powder.
[0081] (2) 5% Ni doped FeS described in step (1) 2 The powder is ultrasonically dispersed in polyvinyl alcohol solution, and then the dispe...
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