Study On Electrochemical Detection Of Hydrogen Peroxide And Terbutaline Based On Micro-nano Materials

Since hydrogen peroxide is one of the most versatile industrial chemicals,it is widely used as a bleaching agent in food,textiles and personal care products.It is also a pollutant in many food,pharmaceutical and environmental environments.Terbutaline,as aβ-adrenergic agonist,is unreasonably used as a feed additive to increase the lean percentage of beef and pork because it can stimulate protein accumulation and inhibit animal fat accumulation.These substances are used by the human body Consecutive intake can seriously affect human health.Therefore,it is necessary to establish a fast,simple and sensitive detection method for the detection of pollutants.The electrochemical method has the advantages of easy to use,simple,high sensitivity,and low cost.Combined with the excellent properties of nanomaterials:high surface-to-volume ratio,possibility of surface functionalization,good thermal characteristics,and providing a wide range of analytical applications of the required flexibility,so nanomaterials are receiving increasing attention.In this paper,hydrogen peroxide and xtebutalin are used as detection objects,and the detection and analysis are based on a variety of metal nanomaterials electrochemical three-electrode systems.The research results are as follows.（1）Study the electrochemical detection of hydrogen peroxide and terbutaline using modified electrodes of cobalt-nickel micro-nano composite precursor materials:A simple,green template-free precipitation method was used to synthesize cobalt-nickel micro-nano composite structures.The material was characterized by field emission scanning electron microscope（FESEM）,transmission electron microscope（TEM）,and energy dispersive X-ray analysis（EDX）.The results show that the material has a hollow structure and has needle-like nanowires and porous characteristics;The material has a high specific surface area of 71.95 m²·g^-1.The material modified glassy carbon electrode was used for electrochemical detection of hydrogen peroxide and terbutaline.The current response value has a good linear relationship with the corresponding value of hydrogen peroxide concentration in the range of 0.05-50 mmol/L,and the detection limit is 3.2μmol/L（S/N=3）;The current response value has a good linear relationship with the corresponding value of Tebutaline in the range of 0.1-50 mmol/L,and the detection limit is 0.1 mmol/L（S/N=3）.（2）Study on electrochemical detection of hydrogen peroxide and terbutaline by cobalt-nickel precursor screen-printed electrodes:The cobalt-nickel micro-nano composite structure precursor material was synthesized by the precipitation method,and the synthesized material was modified in the screen-printed electrode of the working electrode surface.hydrogen peroxide and terbutaline were detected by a three-electrode system in a screen-printed electrode.The current response value has a good linear relationship with the corresponding value of hydrogen peroxide concentration in the range of 0.05-50 mmol/L,and the detection limit is 14.8μmol/L（S/N=3）;The current response value has a good linear relationship with the corresponding value of Tebutaline in the range of 0.05-50 mmol/L,and the detection limit is 2.5μmol/L（S/N=3）.（3）Study the electrochemical detection of hydrogen peroxide and terbutaline by modified zinc oxide materials:First,zinc oxide microsphere material was synthesized,and then it was modified on the surface of glassy carbon electrode.The hydrogen peroxide and terbutaline were detected by electrochemical instruments.The current response value has a good linear relationship with the corresponding value of the hydrogen peroxide concentration in the range of 0.05-50 mmol/L,and the detection limit is 3.5μmol/L（S/N=3）;The current response value has a good linear relationship with the corresponding value of Tebutaline in the range of 0.05-20 mmol/L,and the detection limit is 22.3μmol/L（S/N=3）.