▎ 摘　　要

NOVELTY - Preparing graphene quantum dots (GQDs)/titanium dioxide (TiO2)/alpha-iron oxyhydroxide (FeOOH) three composite photocatalyst involves taking ferrous sulfate heptahydrate as precursor to prepare alpha-FeOOH powder, taking butyl titanate as substrate to prepare TiO2 gel, taking glucose as raw material, performing hydrothermal reaction to prepare GQDs powder; dissolving TiO2 gel distilled water, adding GQDs powder, fully stirring and dispersing, adding alpha-FeOOH powder, continuously stirring for 1-3 hours under water bath condition of 40-80degrees Celsius, drying at 60-100degrees Celsius to obtain three composite photocatalyst. USE - Method for preparing GQDs/titanium dioxide/alpha-FeOOH three composite photocatalyst. ADVANTAGE - The method enables to prepare composite photocatalyst, which has synergistic effect which is generated between three materials, where internal local electric field is constructed; and improves photogenerated electron transfer ability and degradation ability of pollutant. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of method for preparing GQDs/TiO2/ alpha -FeOOH three composite photocatalyst. (Drawing includes non-English language text).