Abstract
Surface properties and structures of materials are essential for their adsorption of pollutants in water. Humic acids (HA)-supported CeO₂ nanosheet composites are synthesised by solvothermal method. The size of CeO₂ nanosheets are approximately 100-500 nm. The obtained composite exhibits superior adsorption ability for Congo Red (CR) in water, which can be attributed to its unique structure and highly dispersed CeO₂ nanosheet. The composite's adsorption behaviour of CR follows a pseudo-second-order mode and Langmuir adsorption model well, and the maximum adsorptive capacity for CR achieves 260 mg g-1. The presence of CeO₂ nanosheets enhances surface area and enriches the mesoporous structure of the composites, thereby promoting CR adsorption capacity.
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