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Chemcial Industry and Engineering 2022, Vol. 39 Issue (2) :50-60    DOI: 10.13353/j.issn.1004.9533.20210301
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Preparation and performance of amino-functionalized SBA-15 for adsorption of ions in hydrogen peroxide solution
CHEN Qiquan1, REN Xiangwei2, ZHANG Yue1, WANG Li1
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2. School of Science, Tianjin University, Tianjin 300350, China

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Abstract Amino-functionalized mesoporous silica SBA-15 was prepared with 3-aminopropyltriethoxysilane (APTES) via post-synthesis grafting method and used as absorbents for removal of metal ions, anions and organic impurities from a hydrogen peroxide solution to produce ultra-pure hydrogen peroxide. The results showed that the N content in amino-functionalized SBA-15 increases with increasing the addition amount of APTES, with a maximum of 1.83%. Two-dimensional hexagonal ordered structure of SBA-15 is well preserved after grafting with APTES. However, the specific surface area and pore volume of SBA-15 decrease slightly with increasing the grafting amount. The surface of SBA-15 in the hydrogen peroxide solution has positive charge. The functionalization of SBA-15 by grafting of amino groups induces an extremely significant improvement in the adsorption capacity for Al3+ and Fe3+ with purification rate of 82.22% and 78.78%, and the moderate improvement for Ca2+, K+, Na+, PO43- and organic impurities in the hydrogen peroxide solution. Kinetic studies and adsorption isotherm data indicated that adsorption of metal ions and PO43- was chemical adsorption. It has been speculated that metal ions are removed from the hydrogen peroxide solution by complexation with the surface of SBA-15, and PO43- and organic impurities by electrostatic and physical adsorption, respectively.
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CHEN Qiquan
REN Xiangwei
ZHANG Yue
WANG Li
KeywordsSBA-15;   adsorption;   amino-functionalization;   hydrogen peroxide;   metal ions;   PO43-     
Received 2021-02-26;
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CHEN Qiquan, REN Xiangwei, ZHANG Yue, WANG Li.Preparation and performance of amino-functionalized SBA-15 for adsorption of ions in hydrogen peroxide solution[J]  Chemcial Industry and Engineering, 2022,V39(2): 50-60
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