Electrocatalysis of Uric Acid by Ni2FeS4 Mesoporous Sheet Nanostructured Modified Electrode
Ni2FeS4 mesoporous nanosheets were synthesized by soft template method under different metal ratios,with nickel nitrate and ferric nitrate acted as metal sources,thioacetamide as sulfur source,PEO20-PPO70-PEO20 triblock copolymer(P123)as guiding and pore-forming agent.The uric acid sensor was formed by film formation on glassy carbon electrode(GCE).Cyclic voltammetry(CV),current time(I-t)and differential pulse voltammetry(DPV)were used to detect uric acid in serum.The relationship between pH and scanning rate of Ni2FeS4 supporting electrolyte and peak current was investigated.The results showed that the modified electrode prepared under optimal conditions has high electrochemical activity,good selectivity,stability and reproducibility for uric acid.The linear range and detection limit were 3～300 and 0.55 μmol/L,and the recoveries were 95.2％～103.8％.
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