Glassy carbon electrode for detecting mercury ions as well as preparation method and application of glassy carbon electrode

The invention relates to the technical field of electrochemical analysis and detection, and particularly discloses a preparation method of a glassy carbon electrode for detecting mercury ions, which comprises the following steps: pretreating the glassy carbon electrode; preparing a nano-zinc oxide and carboxylated carbon nanotube modification solution, and dropwise taking the modification solution on the surface of the glassy carbon electrode to obtain a nano-zinc oxide/carbon nanotube composite glassy carbon electrode; and placing the nano-zinc oxide/carbon nanotube composite glassy carbon electrode in a chloroauric acid solution for electro-deposition to obtain the nano-zinc oxide/carbon nanotube/nano-gold particle composite glassy carbon electrode. According to the preparation method of the glassy carbon electrode for detecting the mercury ions, the carbon nano tube-nano zinc oxide is adopted as an effective substrate for fixing gold nano particles, the stability and the electron transfer capacity of the e