Preparation of SBA-15 surface lanthanum ion-imprinted polymer and its adsorption properties
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Preparation of SBA‑15 surface lanthanum ion‑imprinted polymer and its adsorption properties Longlong Yue1 · Qian Xie1 · Yifeng Yang1 · Jing Li1 · Xiancai Li1 Received: 31 October 2019 / Revised: 31 August 2020 / Accepted: 30 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The preparation of a lanthanum ion-imprinted polymer is described via surface ion imprinting, with polyethyleneimine as the functional monomer and SBA-15 as the matrix material. Its structure was characterized and analyzed, and static adsorption experiments were carried out to determine the best experimental conditions for the adsorption of lanthanum ions. The effects of initial concentration, temperature, adsorption time and pH on the adsorption of lanthanum ion surface-imprinted polymer were investigated. In addition, the regeneration performance of La(III)-IIP-PEI/ SBA-15 on lanthanum ion was studied and showed that La(III)-IIP-PEI/SBA-15 has strong specific recognition ability and high reuse performance. Keywords Surface ion imprinting · Polyethyleneimine · SBA-15 · Specific recognition ability
Introduction SBA-15 is an important constituent of SBA series-type mesoporous molecular sieves [1]. Its structure is identical to that of MCM-41 mesoporous molecular sieves, both of which are two-dimensional hexagonal structures [2–6]. Due to improved hydrothermal stability, SBA-15 is widely used in catalytic and adsorption reactions. Sewage is commonly treated with adsorption technology [7], and its efficiency can be improved by using SBA-15. Due to the simple operation and high adsorption capacity of the adsorbent, the adsorption method has become the most effective in treating rare earth ion contamination [8]. SBA-15 molecular sieve was first synthesized by Academician Zhao [9] in 1998. The step of synthesizing SBA-15 molecular sieve requires two parts: The first part is to form a liquid crystal phase in solution through active agent molecules (such as P123) containing hydrophilic and hydrophobic groups at both ends and inorganic * Xiancai Li [email protected] 1
College of Chemistry, Nanchang University, Nanchang 330031, People’s Republic of China
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Polymer Bulletin
monomer molecules under a certain condition. Organic–inorganic liquid crystal phase: At this time, the structure of the sample has a lattice parameter of nanometer size. The second part uses high-temperature heat treatment to remove the organic template, and the sample will form a highly ordered pore structure. So far, there are three main methods for preparing SBA-15 molecular sieves: hydrothermal synthesis [10, 11], sol–gel method and microwave radiation method. The hydrothermal synthesis method is a reaction of an acid solution, a templating agent and a silicon source in a constant temperature water bath. After a certain period of time, it is crystallized, washed, filtered and dried. Next, the template is calcined by high temperature to obtain a mesoporous material. The research focus of surface ion-imprinted materials
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