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      Facile Route to Synthesize Pore Expanded Platelet SBA-15 for Enhanced Amidoxime-Functionalization and Efficient Extraction of U(VI) from Aqueous Solution

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          Short channel platelet SBA-15 mesoporous material is one of the effective adsorbent for the recovery of U(VI) from aqueous solution. Nevertheless, the defect is that the mesoporous size limits the total stripping of attached U(VI) in recycling use and the increasing densities of organic groups after functionalization. Thus, a simple and controllable method was adopted to prepare SBA-15-type material with expanded pore channel by adding trimethylbenzene in synthesis procedure. The structure, morphology and functional groups were characterized by scanning electron microscope, powder X-ray diffraction, thermogravimetric analysis, transmission electron microscope, FTIR and N 2 adsorption-desorption isotherm analysis. Furthermore, the adsorption behavior of obtained product was test under various factors such as initial concentration, pH, elution rate and contact time. The pore expanded platelet SBA-15 exhibited higher U(VI) adsorption capacity, higher elution rate, and more bearing of amidoxime groups. Due to the higher amidoxime groups, the adsorption capacity of U(VI) on the amidoxime functionalized pore-expanded SBA-15 was 674 mg-U g −1. The results show that the simple and controllable pore-expanded method is an effective strategy to enhance the elution effect and increase grafting amount of organic groups on the mesoporous materials.

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          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          02 September 2020
          01 October 2020
          : 19
          : 5
          : 1103-1115
          1Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
          2College of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066600, China
          3School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
          Author notes
          *Corresponding authors: ZHU Guiru, E-mail: zhugr@ ; YUAN Junsheng, E-mail: jsyuan2012@
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2020.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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