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

作　　者：JI Guojia WANG Xingjun ZHU Guiru SONG Chenghao YUAN Junsheng GAO Congjie 

机构地区：[1]Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China [2]College of Chemical Engineering,Hebei Normal University of Science and Technology,Qinhuangdao 066600,China [3]School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China

出　　处：《Journal of Ocean University of China》2020年第5期1103-1115,共13页中国海洋大学学报（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities (No. 201964020);the National Natural Science Foundation of China (No. U1607124)。

摘　　要：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-Ug^-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.

关 键 词：platelet SBA-15 pore expanded amidoxime-functionalization U(Ⅵ)adsorption 

分 类 号：X591[环境科学与工程—环境工程] O658.2[理学—分析化学]