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Published on: June 26, 2020
Shape-dependent adsorption of CeO2 nanostructures for superior organic dye removal
Ning-Chao Zheng1, Zhu Wang1, Jian-You Long2
1School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory for Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou 510006, China; School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.
Abstract:
Highly efficient removal of dye pollutants from water resources remains a great challenge. Herein, we demonstrate a new approach for the efficient removal of anionic organic dyes from wastewater using shape-dependent CeO2 nanostructures. It was found that the volume stoichiometry ratio of ethanol to water (EtOH/H2O) was a key factor affecting the CeO2 nanostructures. Accordingly, the adsorption capacity of the spindle CeO2 nanostructure for Congo red reached 162.4 mg g-1, which is much higher than that of octahedral and spherical CeO2 or other adsorbents previously reported. The superior adsorption performance may be mainly attributed to the peculiar structure and presence of electrostatic interactions between the sample surface and dye molecules. This finding will provide new avenues for using promising adsorbent materials for dye removal in water treatments.
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