Nowadays,the problem of water resource pollution is becoming more serious,and the removal of organic dye pollutants in freshwater is facing a major challenge.γ-Al2O3,as a new type of pore material,can be widely used in the fields of adsorption,catalysis,medicine and new energy,but the cost of preparing and application of γ-Al2O3 material remains high due to the low recovery of powder γ-Al2O3 material in practical applications.Spherical mesoporous γ-Al2O3 materials with high purity,good sphericity,high compressive strength,tunable pore structure and high dye-removal ability were prepared by sol-gel and oil-ammonia column forming methods without adding any additives using aluminum isopropoxide as the source of organic aluminum.At the same time,we explored the effect of the acid addition method on the material's pore structure and other physical and chemical properties.We selected Congo red (CR) dye to test the adsorption properties of the prepared spherical γ-Al2O3.According to the test results,the removal of CR dye solution by the prepared material was close to 100%,and the adsorption of CR by the sample was maintained above 97% after five cyclic adsorption tests.This facile and delicate way for the preparation of spherical mesoporous γ-Al2O3 materials has potential value to be widely used in wastewater purification,industrial catalysis,material production and medicine.
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