▎ 摘　　要

NOVELTY - Full-solid potassium ion selective electrode comprises a transduction layer that is set on a surface of a substrate, and a potassium ion selective membrane that is covered on a surface of the transduction layer. The transduction layer comprises a graphene-molybdenum trioxide nano-composite material. USE - The electrode is useful for detecting potassium ion (K+) by using wearable sensor (all claimed). ADVANTAGE - The electrode: utilizes reduced graphene oxide which has high surface area, high conductivity, high hydrophobicity; utilizes molybdenum trioxide which has high redox capacitance; utilizes transduction layer which has electric double layer, redox capacitor, strong conductivity and hydrophobicity; effectively prevents the formation of electrode water layer; and has good response to potassium ion and excellent potential stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the full-solid potassium ion selective electrode, comprising coating slurry that containing graphene-molybdenum trioxide nano-composite material on surface of substrate, drying to form transduction layer, and preparing potassium ion selective membrane on surface of transduction layer; and (2) wearable sensor, comprising full-solid potassium ion selective electrode.