Preparation of Arsenate Anion Surface-Imprinted Material IIP-PDMC/SiO₂ and Study on Its Ion Recognition Property

Abstract

By molecular design, a new ion surface-imprinting technique was set up based on surface-initiated graft-polymerization, and arsenate anion surface-imprinted material with high performance was prepared for the first time. A redox initiating system was constituted by the amino groups on the surface-modified silica gel particles and the ammonium persulphate in the solution. The cationic monomer 2-methacryloyloxyethyl-trimethyl ammonium chloride (DMC) was used as functional monomer and N,N′-methylenebisacrylamide (MBA) was used as cross-linker. In the solution, the monomer molecules were arranged around the template ion, arsenate anion, via ion exchange action, and then the arsenate anion surface-imprinting was carried out along with the surface-initiated graft-polymerization of DMC and MBA, forming arsenate anion surface-imprinted material IIP-PDMC/SiO2. The experimental results show IIP-PDMC/SiO2 possesses specific recognition selectivity and excellent binding affinity for arsenate anion. The selectivity coefficients of IIP-PDMC/SiO2 for arsenate anion are 8.814 and 7.898 relative to chromate and nitrate ions, respectively.

Preparation of molecule imprinted membrane of single enantiomer of amino acid with an innovative strategy and study on its chiral recognition and resolution properties

“…AMPSF membrane was placed in an aqueous solution containing monomer DMAEMA and initiator APS, and a surface initiating system of ‐NH 2 /S 2 O 8 2− was constituted at the interface between AMPSF membrane and the aqueous solution. The monomer DMAEMA was graft‐polymerized on the surface of PSF membrane by initiating the surface initiating system ‐NH 2 /S 2 O 8 2− . The grafted membrane PSF‐g‐PDMAEMA was obtained and had a PDMAEMA grafting degree of 0.64 mg cm −2 .…”

Ultrasensitive Detection of Phosphate Using Ion-Imprinted Polymer Functionalized AlInN/GaN High Electron Mobility Transistors

“…Rapid thermal annealing was performed for ohmic contact activation at 850°C for 30 s in a flowing N 2 at mosphere. The electrodes were protected by a 120-nm-thick Si 3 Finally, open ungated area was functionalized with phosphate IIPs [9]. The schematic d iagram of the GaN-based sensor is illustrated in Fig.…”

Constituting of a new surface‐initiating system on polymeric microspheres and preparation of basic protein surface‐imprinted material in aqueous solution

“…Our group also contributes our effort to the development of the surface‐imprinting techniques. In our previous studies, two surface imprinting techniques were established, and they can be called as the method of “pre‐graft polymerizing and post‐imprinting” and the method of “synchronously graft/cross‐linking polymerization and imprinting”, respectively. With the two techniques, various small‐molecule imprinted materials with high performance were prepared.…”