▎ 摘　　要

NOVELTY - Synthesizing titanium dioxide capable of regenerating coordination sites in-situ for photocatalytic reduction of uranium, comprises (1) dispersing titanium dioxide nanosheets in water, adding uranyl nitrate, and mixing uniformly to obtain mixed solution, and (2) heating the obtained mixed solution to remove moisture, calcining the obtained solid in an inert gas atmosphere, and cooling to room temperature to obtain titanium dioxide. USE - The titanium dioxide capable of regenerating coordination sites in-situ for photocatalytic reduction of uranium is useful in treating radioactive wastewater including uranium-containing radioactive wastewater (claimed). ADVANTAGE - The method: adopts high-temperature annealing to introduce uranium single-atom doping into titanium dioxide nanosheets to in situ create oxygen vacancies in a photocatalytic environment, and thus solves the problems of limited vacancies in oxide semiconductors; and achieve high-capacity single-atom confinement of uranium. The titanium dioxide improves removal and reduction ability of U(VI) in radioactive wastewater. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of the titanium dioxide in treating radioactive wastewater including uranium-containing radioactive wastewater.