Design of mesoporous silica hybrid materials as sorbents for the selective recovery of rare earth metals

文献情報

出版日 2015-04-03

DOI 10.1039/C4TA06860B

インパクトファクター 12.732

著者

Xudong Zheng, Chun Wang, Jiangdong Dai, Weidong Shi, Yongsheng Yan

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要旨

The importance of rare earth metals in the global economy has increased significantly in recent years due to their essential role in advanced technologies in the electronics and biomedical industries. The recovery and purification of rare earth metals from waste products is therefore appealing, both in terms of the sustainability of rare earth resources and ecological environmental protection. We herein present the preparation of novel mesoporous silica materials modified by maleic anhydride, which can be used in the recovery of rare earth metals through extraction of their ions from an aqueous solution. Our novel maleic anhydride functional hybrid materials demonstrate enhanced selectivity for heavy rare earth metals, which vastly improves the separation process and reduces recovery costs. In addition, the directly modified hybrid materials have been found to exhibit higher distribution coefficients for rare earth elements compared to other materials. Adsorption kinetics studies were also carried out, and the adsorption followed a pseudo-second order model, with particularly rapid adsorption observed in the case of Gd3+. The resulting adsorption isotherms of the materials were better represented by the Langmuir model than the Freundlich model. The singly modified material exhibited a Gd3+ capture capacity of 76.89 mg g−1. In addition, the proposed materials demonstrate a high degree of reusability over a number of cycles, thus enhancing their potential for application in rare earth metal recycling.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Design of mesoporous silica hybrid materials as sorbents for the selective recovery of rare earth metals

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