Preparation PtNi Nano-particles And Its Application In Glucose Sensors

Glucose is the common compound in the life,in many fields such as clinical medicine,biotechnology food production,fermentation control,able to quickly and reliably and testing analysis of its content has the special significance.There are many methods for detecting glucose,but it is of great significance to develop a method with wide application range,high sensitivity and high selectivity.With the emergence of nanomaterials,researchers began to take many efforts on the combination of nanometer materials and electrochemical glucose sensor,after a long study,found that enzyme glucose sensor has excellent performance and broad prospects.In this paper,the different Pt-based nanoparticles were synthesized by different methods,structure,elements and physical chemistry properties were characterized.The electrochemical characterization revealed that the non-enzymatic glucose sensor based on Pt-based nanoparticles.First,the stone-like PtNi NPs were synthesized using a facile method at room temperature.Its structure,morphology and composition are characterized by X-ray powder diffraction?XRD?,transmission electron microscope?TEM?and energy dispersive spectrum?EDS?.Next,the PtNi nanoparticles were added on a glassy carbon electrode?D=3 mm?to fabricate the PtNi/GCE,and detected glucose by cyclic voltammetry.Experimental results show that the PtNi alloy nanoparticles is face-centered cubic structure,at the same time have some surface defects.The sensor exhibited high catalytic ability toward glucose,such as a wide linear range?0.5 mM⁴0mM?,rapid response?t<1 s?,low detection limit?0.35?M?and high sensitivity(40.17?AmM^-1cm^-2).The sensor also exhibited anti-interference ability from ascorbic acid?AA?,uric acid?UA?and fructose?Fru?.The second,the core shell structure Au@PtNi alloy nanoparticles were synthesized.The testing methods like the first part.The experimental results show that Au@PtNi alloy nanoparticles had a higher electrochemical activity area compared with the PtNi alloy nanoparticles,The sensor exhibited the better performance towards glucose detection,such as a wide linear range?0.5 mM⁶0mM?,low detection limit?0.22?M?and high sensitivity(64.34?AmM^-1cm^-2).The sensor also exhibited strong anti-interference abilityThe third,PtNi alloy nanoparticles were synthesized by different method.The results of XRD and TEM show that the PtNi alloy nanoparticles are still faced-centered cubic structure,but the size of nanoparticles are very small about 2.5±1nm.Electrochemical detection results show that the fabricated PtNi/GCE electrode to the oxidation ability of glucose is not best compared with the first part,but still has good sensitivity(11.7?AmM^-1cm^-2)and low detection limit?1.21?M?,and has a good linear relationship between 5x10^-44 and 2x10^-2mol/L.The fourth testing part,in order to further study of the same cycle transition metal toward the influence of Pt-based catalyst and PtCo alloy nanoparticles was synthesized,the experimental results show that the sensor based on PtCo alloy nanoparticles exhibited a good performance towards glucose detection,which has a good linear relationship between5x10^-4 and 6x10^-2mol/L,the sensitivity is 3.93?AmM^-1cm^-2 and detection limit is 36?M.