▎ 摘　　要

NOVELTY - The preparation method of graphene-loaded nano-zirconia composite material involves: (1) adding graphite oxide to deionized water, and performing ultrasonic dispersion to obtain graphene oxide dispersion liquid; (2) mixing appropriate amount of nano-zirconia powder with graphene oxide dispersion liquid, stirring, and sufficiently mixing zirconia with graphene oxide to obtain suspension; and (3) pouring resulting suspension into reaction kettle of PTFE liner, tightening the lid of reaction kettle, placing in oven, and carrying out reaction at 150-170 degrees C for 4-6 hours. USE - The method is useful for preparing graphene-loaded nano-zirconia composite material (claimed). ADVANTAGE - The method enables simple preparation of graphene-loaded nano-zirconia composite material in an environmentally-friendly manner. DETAILED DESCRIPTION - The preparation method of graphene-loaded nano-zirconia composite material involves: (1) adding graphite oxide to deionized water, and performing ultrasonic dispersion to obtain graphene oxide dispersion liquid; (2) mixing appropriate amount of nano-zirconia powder with graphene oxide dispersion liquid, stirring, and sufficiently mixing zirconia with graphene oxide to obtain suspension; and (3) pouring resulting suspension into reaction kettle of PTFE liner, tightening the lid of reaction kettle, placing in oven, carrying out reaction at constant temperature of 150-170 degrees C for 4-6 hours, cooling reaction kettle to room temperature after the reaction is completed, centrifuging, filtering to get paste, and then drying. INDEPENDENT CLAIMS are included for the following: (1) graphene-loaded nano-zirconia composite material prepared by the above-method; and (2) use of graphene-loaded nano-zirconia composite material as composite carbon paste electrode for removing nitrite or sulfite ions in water.