▎ 摘　　要

NOVELTY - Preparing room temperature field-effect transistor (FET) type hydrogen sensor based on molybdenum trioxide (MoO3) nanoribbon modified graphene, comprises e.g. adding deionized water to the polytetrafluoroethylene reactor, adding hydrogen peroxide to deionized water, slowly adding molybdenum powder while stirring under ice bath, after the solution changes from dark green to orange, continue to stirring for 30-60 minutes, placing the polytetrafluoroethylene reactor into the metal reaction shell and placing in a hydrothermal oven at 170-200 degrees C for 36-72 hours, washing the resulting product with deionized water and absolute ethanol to neutrality and drying to obtain a white powder molybdenum oxide nanoribbons, sputtering gold under the conditions of argon atmosphere and 70 W sputtering power, sputtering source-drain electrode on a single-layer graphene substrate, taking the molybdenum oxide nanoribbon powder into a quartz tube containing an ethanol solution. USE - The method is useful for preparing room temperature field-effect transistor type hydrogen sensor based on molybdenum trioxide nanoribbon modified graphene. ADVANTAGE - The method improves performance of the graphite alkenyl sensor. DETAILED DESCRIPTION - Preparing room temperature field-effect transistor (FET) type hydrogen sensor based on molybdenum trioxide (MoO3) nanoribbon modified graphene, comprises (i) adding deionized water to the polytetrafluoroethylene reactor, adding hydrogen peroxide to deionized water, slowly adding molybdenum powder while stirring under ice bath, after the solution changes from dark green to orange, continue to stirring for 30-60 minutes, placing the polytetrafluoroethylene reactor into the metal reaction shell and placing in a hydrothermal oven at 170-200 degrees C for 36-72 hours, washing the resulting product with deionized water and absolute ethanol to neutrality and drying to obtain a white powder molybdenum oxide nanoribbons, (ii) sputtering gold under the conditions of argon atmosphere and 70 W sputtering power, sputtering source-drain electrode on a single-layer graphene substrate based on Si/SiO2 aspect ratio of the drain electrode is 8:3, sputtering Au on the Si substrate as the gate electrode, and the thickness of Au is 20-40 nm, (iii) heating equipment, liftable optical platform and vacuum pump are used to connected the spray pen to one end of the vacuum pump, the optical platform controls the position of the spray pen and prepares to configure filming and spraying the good mixed liquid, taking the molybdenum oxide nanoribbon powder into a quartz tube containing an ethanol solution, where the molar ratio of the molybdenum oxide nanoribbon powder and the ethanol solution is 1:100 to obtain solution A, the density of the ethanol solution is 0.7893 g/ml, subjecting solution A to ultrasonic treatment for 5-30 minutes, and the ultrasonic frequency is 50-100 Hz, (iv) utilizing a pipette to measure the solution A after the ultrasonic treatment, placing into the airbrush equipped with ethanol solution, in which the volume ratio of the solution A and the ethanol solution after ultrasonic treatment is : 1: 400, and (v) fixing the distance between the airbrush and the device to 15 cm and the air pressure of the vacuum pump to 0.5 Pa, spraying the solution to the center of the source-drain electrode obtained by magnetron sputtering, spraying time is 5-50 seconds, drying by heating equipment, annealing at 200 degrees C for 2 hours. An INDEPENDENT CLAIM is also included for room temperature FET type hydrogen sensor.