▎ 摘　　要

NOVELTY - Preparing dendritic composite nanowire three-dimensional electrode material comprises (1) growing polypyrrole nanowires on the three-dimensional anode to support the three-dimensional electrode material, (2) adding aniline to sulfuric acid, adding the polypyrrole nanowire-supported three-dimensional electrode material prepared in the step (1), uniformly stirring, and cooling the obtained solution to 4-5degrees Celsius, where the concentration of aniline in the solution is 100-200 mM, and (3) adding ammonium persulfate in sulfuric acid at 4-5degrees Celsius, immediately adding to the solution in the step (2) to obtain mixed solution after stirring for 30-35 seconds, stirring for 30-35 seconds, allowing to stand the reaction in environment of 4-5degrees Celsius for 24-25 hours to obtain dendritic polypyrrole (PPy)-polyaniline (PANI) composite nanowire three-dimensional electrode material. USE - The electrode material is useful for sewage treatment containing hexavalent chromium (claimed). ADVANTAGE - The electrode material: has larger specific surface area; provides more reactive sites; improves current efficiency and reduction efficiency; and is suitable for large-scale industrial chromium (VI) sewage treatment with high flux and high concentration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for dendritic composite nanowire three-dimensional electrode material prepared by the preparation method.