以Al(NO3)3·9H2O为铝源、尿素为沉淀剂,无模板水热法制备了单分散、尺寸均一的核桃状分级结构γ-AlOOH。用XRD、SEM、TEM和氮气吸脱附法对样品进行了表征,探讨了γ-AlOOH纳米结构形成机理,并研究了其对刚果红的吸附性能。实验结果表明,核桃状分级结构组成单元为纳米纤维,比表面积为101.3 m2/g,平均孔径为21.88 nm,并对刚果红表现出良好的吸附特性,吸附率和最大吸附量分别为98.8%和98.8 mg/g。 Using Al (NO3) 3 · 9H2O as the aluminum source and urea as the precipitating agent, monodisperse and uniform walnut-like graded γ-AlOOH were prepared by hydrothermal method without template. The samples were characterized by XRD, SEM, TEM and N2 adsorption-desorption. The formation mechanism of γ-AlOOH nanostructures was discussed. The adsorption of Congo red was also studied. The experimental results showed that the walnut-like hierarchical structure was composed of nanofibers with a specific surface area of ​​101.3 m2 / g and an average pore diameter of 21.88 nm, and showed good adsorption properties for Congo red. The adsorption rate and the maximum adsorption capacity were 98.8% and 98.8 mg / g.