Controllable Synthesis of Spindle-Shaped β-FeOOH and Its Effective Adsorption for High Concentrated Congo Red

摘要

Spindle-shaped beta-FeOOH nanostructures have been successfully prepared by a facile, green, and glycerol assisted solvothermal process. The spindle-like nanostructures are 25-45 nm in width and 80-180 nm in length, embracing uniform particle size. The formation mechanism of the spindle-shaped beta-FeOOH, as well as the effect of glycerol and solvothermal temperatures, has been investigated in detail. The N-2 sorption results revealed that the beta-FeOOH samples possess a large surface area (178.73 m(2).g(-1)) and characteristic mesoporous structures. The XPS analysis showed that as-obtained samples have many Fe-OH groups, which is benifical for Congo red (CR) adsorption. Furthermore, the obtained samples have shown superior performance for highly concentrated CR adsorption with a maximum adsorption capacity of 714.29 mg/g. It indicates that the spindle-shaped beta-FeOOH products can be potentially as a low-cost nanomaterial for efficient removal of poisonous organic pollutants from wastewater.