Surface molecularly imprinted polymer prepared by reverse atom transfer radical polymerization for selective adsorption indole

Abstract

The preparation of indole molecularly imprinted polymers (indole-MIPs) using 4-vinylpyridine as functional monomer, silica gel as matrix were used to adsorb indole from fuel oil specifically. The reverse atom transfer radical polymerization (RATRP) technology was introduced to prepare the surface molecularly imprinted polymers, and the precipitation polymerization was adopted in the preparation process. The obtained indole-MIPs were characterized by nitrogen adsorption, Fourier transform infrared spectrometry and scanning electron microscopy. The results show that indole-MIPs were provided with the larger surface areas and more pores. The adsorption capacity of indole-MIPs was 31.80 mg g 21 at 298 K, and the adsorption equilibrium was reached in a short time. The adsorption process was spontaneous by thermodynamic analysis, and an appropriate decrease in temperature could enhance the adsorption capacity. The adsorption process obeyed pseudo-second-order kinetic model by kinetics analysis. The isotherm analysis results show that both Langmuir and Sips equations were suitable to experimental data. The selective adsorption and reusable performance of indole-MIPs were favorable.

A molecular imprinted polymer on the surface of superparamagnetic Fe3O4–graphene oxide (MIP@Fe3O4@GO) for simultaneous recognition and enrichment of evodiamine and rutaecarpine in Evodiae fructus

“…However, Q e reduced with the increasing temperature, indicating the exothermic nature of the adsorption processes. This performance was attributed to the hydrogen bond interaction between adsorbent and EVO, and the hydrogen bond force was weak at a higher temperature . Moreover, under the same conditions MIP@Fe 3 O 4 @GO exhibited a higher Q e than NMIP@Fe 3 O 4 @GO in all cases.…”

Electrochemical sensor based on nanostructured ion imprinted polymer for the sensing and extraction of Cr(III) ions from industrial wastewater

“…The selectivity of Cr(III) ion with different adsorbents such as MWCNT‐IIP, MWCNT‐NIP, IIP and NIP was studied using different metal ions such as Mn(II), Fe(II) and Ni(II) by batch experiments. The separation and selectivity factor of Cr(III) ion were calculated using the following equations: …”

Preparation and characterization of molecular imprinted polymer functionalized with core/shell magnetic particles (Fe 3 O 4 @SiO 2 @MIP) for the simultaneous recognition and enrichment of four taxoids in Taxus × media

“…In particular, compared with traditional MIP surface molecular imprinted polymer had many advantages due to the thin MIP film on the surface, such as the high adsorption capacity and fast mass transfer [14][15][16]. The core/shell MIP was one of the most important surface molecular imprinted polymers.…”