Accurate and effective detection of hydrogen peroxide(H_(2)O_(2))is of great significance in physiological functions as well as industrial applications.In this paper,the rod-like NiO-Co_(3)O_(4)nanomaterials were synt...Accurate and effective detection of hydrogen peroxide(H_(2)O_(2))is of great significance in physiological functions as well as industrial applications.In this paper,the rod-like NiO-Co_(3)O_(4)nanomaterials were synthesized by a simple hydrothermal method for electrochemical detection of H_(2)O_(2).The characterization results indicated that the nanomaterials possess high porosity and excellent conductivity,and displayed good electrocatalysis activity at the same time.Under alkaline conditions,the as-prepared nanomaterials can catalyze the reduction of H_(2)O_(2)and realize the electron transfer between H_(2)O_(2)and the electrode.The H_(2)O_(2)electrochemical sensor based on NiO-Co_(3)O_(4)nanomaterials exhibited a wide linear response(1-250 and 250-1200μmol/L),a low detection limit(0.1μmol/L)and a high sensitivity(5305.59μA/(mmol/L·cm^(2))(S/N=3)).In addition,the fabricated sensor showed high selectivity,good repeatability and high stability.The applications of the proposed sensor for H_(2)O_(2)detection in food samples were demonstrated and satisfactory results were obtained.展开更多
基金provided by Natural science fund for colleges and universities in Jiangsu Province (19KJB550002)State Key Laboratory of Analytical Chemistry for Life Science (SKLACLS2001),Nanjing University
文摘Accurate and effective detection of hydrogen peroxide(H_(2)O_(2))is of great significance in physiological functions as well as industrial applications.In this paper,the rod-like NiO-Co_(3)O_(4)nanomaterials were synthesized by a simple hydrothermal method for electrochemical detection of H_(2)O_(2).The characterization results indicated that the nanomaterials possess high porosity and excellent conductivity,and displayed good electrocatalysis activity at the same time.Under alkaline conditions,the as-prepared nanomaterials can catalyze the reduction of H_(2)O_(2)and realize the electron transfer between H_(2)O_(2)and the electrode.The H_(2)O_(2)electrochemical sensor based on NiO-Co_(3)O_(4)nanomaterials exhibited a wide linear response(1-250 and 250-1200μmol/L),a low detection limit(0.1μmol/L)and a high sensitivity(5305.59μA/(mmol/L·cm^(2))(S/N=3)).In addition,the fabricated sensor showed high selectivity,good repeatability and high stability.The applications of the proposed sensor for H_(2)O_(2)detection in food samples were demonstrated and satisfactory results were obtained.
