PREPARATION METHOD OF FUNCTIONALIZED GRAPHENE WITH GAS SENSITIVITY AND GAS-SENSITIVE INK

摘要

#$%^&*AU2020102360A420201105.pdf#####Abstract The present application discloses a preparation method of a functionalized graphene with gas sensitivity and a gas-sensitive ink, wherein the preparation method includes the following steps: preparing a sulfonated graphene oxide; and taking potassium stannate as a tin source, 1-cysteine as a sulfur source, CTAB as a dispersing agent, and crystallizing tin sulfide crystals on surfaces of the functionalized graphene under a hydrothermal condition to form a functionalized graphene gas-sensitive material loaded with the tin sulfide. The functionalized graphene obtained by adopting the technical solution of the present application has better dispersion performance in a solvent, and the obtained gas-sensitive ink can rapidly adsorb nitrogen dioxide and ammonia gas molecules, and has extremely high sensitivity, without being influenced by an external humidity environment; and the ink can be directly written on common substrates such as glass, paper, cloth without participation of an interdigital electrode. The preparation method is rapid, simple, convenient, repeatable and easy to control.Drawings - SnS S-rGO 90. -SnS rGO 8070 40 o s530 20 100 500 1000 1500 2000 2500 3000 3500 4000 Time (s) FIG. 1 0-50 g - SnSWS-rGO -20- - SnS2/rGO 1000 2000 3000 4000 5000 6000 Time (s) FIG. 2