▎ 摘　　要

NOVELTY - Preparing graphene-bismuth tungstate comprises (1) mixing sodium tungstate, bismuth nitrate and cetrimonium bromide (CTAB) and dissolving in water, and performing hydrothermal reaction, washing and drying successively to obtain lamellar bismuth tungstate, (2) dissolving lamellae, ultrasonically stripping to obtain dispersed two-dimensional bismuth tungstate nanosheets, (3) placing graphene in the solution and dispersing, laser processing to obtain graphene quantum dots, and (4) mixing the dispersed two-dimensional bismuth tungstate nanosheets with the graphene quantum dots, laser ablation and compounding to obtain graphene-bismuth tungstate products. USE - The graphene-bismuth tungstate is useful in preparing electrocatalytic materials (claimed), preferably photoelectric degradation and hydrogen evolution reaction at cathode of electrolyzed water. ADVANTAGE - The method: utilizes easily available raw materials; introduces graphene quantum dots, which increases the active sites of bismuth tungstate, and improves the catalytic performance of bismuth tungstate; and improves graphene-bismuth tungstate having catalytic performance by 9-13%. The graphene-bismuth tungstate: is easy to recycle and reuse; and is economical..