Zn2+ Addition Modified the Size of α-Fe2O3 for Enhancing of Adsorption Capacity of Pyrene

Zn2+ doping of α-Fe2O3 may increase its chemical activity and, thus, its ability to adsorb organic matter. Therefore, composites of Zn2+ and α-Fe2O3 with different concentration ratios were prepared in this study, and their adsorption capacities for pyrene were investigated. The results showed that Zn2+ doped α-Fe2O3 still had the same square structure as the microstructure of α-Fe2O3, but the size of the square-shaped α-Fe2O3 changed significantly. Subsequently, the ability to adsorb pyrene was enhanced with an increase in Zn2+ content, and the maximum adsorption was 424.57 μg g–1, but the adsorption equilibrium was reached within a certain concentration range. Therefore, this study provides a new idea for further modification of α-Fe2O3, an important reference for the mechanism of action in the adsorption process, and an important theoretical and practical basis for the development of efficient materials for environmental pollution control.