▎ 摘　　要

NOVELTY - The method involves: (a) providing a dispersion comprising graphene oxide; (b) adding a metal precursor and a chalcogenide precursor to the dispersion to form a mixture; (c) heating the mixture under hydrothermal conditions to form a gel; and (d) freeze-drying the gel to obtain the graphene-metal chalcogenide porous material. The metal precursor is a precursor of a metal comprising Group 4 to Group 6 of the Periodic Table of Elements. The step (c) involves heating the mixture in a closed vessel at 150-250 degrees C for 12-48 hours. USE - The method is useful for preparing a graphene-metal chalcogenide porous material, which is useful in water treatment, energy storage, insulation proofing, batteries, or supercapacitors (all claimed). ADVANTAGE - The method enables simple preparation of graphene-metal chalcogenide porous material with reduced cost and high adsorption capacity. The porous material is versatile compared to other absorbents, can adsorb a wide range of pollutants such as organic liquids, dyes, and heavy metals due to presence of negatively charged metal chalcogenide on the material and enables absorption of dyes and heavy metals in water treatment. DETAILED DESCRIPTION - The method involves: (a) providing a dispersion comprising graphene oxide; (b) adding a metal precursor and a chalcogenide precursor to the dispersion to form a mixture; (c) heating the mixture under hydrothermal conditions to form a gel; and (d) freeze-drying the gel to obtain the graphene-metal chalcogenide porous material. The metal precursor is a precursor of a metal comprising Group 4 to Group 6 of the Periodic Table of Elements. The step (c) involves heating the mixture in a closed vessel at 150-250 degrees C for 12-48 hours. The step (d) is carried out at -50 degrees C to 0 degrees C for 24-56 hours. The metal chalcogenide comprises or consists of a metal dichalcogenide, and is negatively charged. The weight ratio of metal chalcogenide to graphene in the graphene-metal chalcogenide material is 860 wt.%. The graphene-metal chalcogenide porous material has a porosity of 99.5-99.9 %. The step (b) involves adding at least one of metal particles or metal oxide particles to the dispersion. An INDEPENDENT CLAIM is included for a graphene-metal chalcogenide porous material prepared by the method.