Author
Haiqing Liu
Bio: Haiqing Liu is an academic researcher. The author has contributed to research in topics: Molecularly imprinted polymer & Electrochemical gas sensor. The author has an hindex of 5, co-authored 6 publications receiving 122 citations.
Papers
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TL;DR: The results show that there are two binding sites of the target molecules and the recovery rates and the relative standard deviation were 88.7∼93.5% and 2.8∼7.2% in water.
Abstract: Magnetic Fe3O4 nanoparticles were prepared by coprecipitation and then were coated with SiO2 on the surface Fe3O4@SiO2 composite microspheres were modified by KH570 Using molecular imprinting technology, atrazine magnetic molecularly imprinted polymer was prepared by using atrazine as template molecule, methacrylic acid as functional monomer and ethylene glycol dimethacrylate as cross-linkers The morphology, composition and magnetic properties of magnetic nanoparticles were characterized The recognition selectivity of polymer was studied for template molecule and simulation by UV spectrophotometry The adsorption properties and selectivity ability were analyzed by Scatchard analysis Scatchard linear regression analysis indicated that there are two binding sites of the target molecules The magnetic molecularly imprinted polymer has been applied to the analysis of atrazine in real samples The results show that: the recovery rates and the relative standard deviation were 940∼987% and 21∼40% in corn, the recovery rates and the relative standard deviation were 887∼935% and 28∼72% in water
74 citations
TL;DR: In this article, a simple method for the formation of molecularly imprinted membrane of Rhodamine B (RhB) was developed by electrospinning, and the as-prepared nanofiber membranes were characterized by scanning electron microscopy (SEM).
Abstract: A simple method for the formation of molecularly imprinted membrane of Rhodamine B (RhB) was developed by electrospinning. RhB molecularly imprinted microspheres were produced by precipitation polymerization using RhB, acrylamide, ethylene glycol dimethacrylatea (EGDMA), azobisisobutyronitrile (AIBN) and acetonitrile as template, functional monomer, cross-linking agent, initiator and porogen, respectively. Then molecularly imprinted membranes (MIMs) were produced via electrospinning technique with polyethylene terephthalate (PET) as the matrix polymer. The as-prepared nanofiber membranes were characterized by scanning electron microscopy (SEM). Optimization studies with the aim to enhance the MIP selection adsorption were carried out with respect to the amount of membrane, pH and adsorption time. Linear range and detection limit were 0.01 ~ 20 μmol/L and 2.0 × 10-3 μmol/L, respectively. HPLC analysis showed that in the optimized conditions of separation and enrichment, the recovery rate can reach 97.8% ~ 117.1%, relative standard deviation (n = 3) was 1.36% ~ 2.19% in employing MIMs to the RhB simulated water samples. The results showed that the imprinted polymer exhibited higher affinity for Rhodamine B compared to non-molecularly imprinted polymers membranes (NIMs) and molecularly imprinted particles (MIP).
25 citations
TL;DR: In this article, a 2D Co-MOF was synthesized by facile and cost-efficient methods, which can be fast prepared with nucleation and crystal growth in several minutes at room temperature.
24 citations
TL;DR: In this article, a molecular imprinting technique was employed to prepare magnetic, fluorescent molecularly imprinted polymer microspheres (fluorescent M-MIP) for recognition and separation of endocrine disrupting chemicals.
Abstract: In this research, molecular imprinting technology was employed to prepare magnetic, fluorescent molecularly imprinted polymer microspheres (fluorescent M-MIP) for recognition and separation of endocrine disrupting chemicals. The fluorescent M-MIP were prepared using Fe3O4@SiO2 magnetic nanoparticles combined with fluorescein (isothiocyanate) as fluorescent material with the surface molecularly imprinting method. The magnetic fluorescent molecularly imprinted polymers were characterized by fluorescence spectrophotometer, X-ray powder diffraction, vibration sample magnetic field meter, scanning and transmission electron microscopic methods. The results showed that the fluorescent M-MIP not only had excellent superparamagnetism and maintained the crystalline structure of the magnetic nanoparticles, but also stable fluorescence. The recognition selectivity of the magnetic fluorescence polymer was studied for template molecule and analogues. The results indicated that the fluorescent quenches of bisphenol A (the selective target) for fluorescent M-MIP were higher than that of the structural analogues, which illustrated the recognition selectivity for bisphenol A. Simultaneously, the fluorescent magnetic non-imprinted polymers (M-NIPs) had much higher fluorescent quenches than the fluorescent M-NIPs in the processes of rebinding. Therefore, the fluorescent M-MIP technology can be used for the recognition, magnetic separation and detection of bisphenol A by fluorescence spectrometry without any time-consuming elution.
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18 citations
Patent•
06 Aug 2014
TL;DR: In this article, a carbon nanotube surface molecularly imprinted polymer as well as a preparation method and application of the preparation method is described. But the method is not suitable for the use in the manufacturing of an electrochemical sensor, since it requires an initiator and a cross-linking agent.
Abstract: The invention discloses a carbon nanotube surface molecularly imprinted polymer as well as a preparation method and application thereof. The preparation method comprises the following steps: taking carboxylated multi-walled carbon nanotubes, synthesizing silicon dioxide-coated multi-walled carbon nanotubes by a sol-gel method; modifying the silicon dioxide-coated multi-walled carbon nanotubes by using a silane coupling agent to obtain alkenylated multi-walled carbon nanotubes; mixing the alkenylated multi-walled carbon nanotubes, Rutin and acrylamide under the protection of inert gas, and performing radical polymerization under the existence of an initiator and a cross-linking agent to prepare the carbon nanotube surface molecularly imprinted polymer. An electrochemical sensor manufactured from the carbon nanotube surface molecularly imprinted polymer has the characteristics of good conductivity, high selectivity, fast response, high sensitivity and the like to the Rutin and can quickly and effectively detect Rutin content of a sample.
8 citations
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TL;DR: In this paper, the authors reviewed the preparation of different types of nanofibers with different secondary nanostructures, including hollow nanofiber modules, for membrane distillation.
242 citations
TL;DR: This review describes the recent discoveries that appeared after repeated and fertile collisions between these two fields in the past three years, to which are added the worthy acknowledgments of pioneering discoveries and a look into the future of molecularly imprinted membranes.
Abstract: More than 80 years ago, artificial materials with molecular recognition sites emerged. The application of molecular imprinting to membrane separation has been studied since 1962. Especially after 1990, such research has been intensively conducted by membranologists and molecular imprinters to understand the advantages of each technique with the aim of constructing an ideal membrane, which is still an active area of research. The present review aims to be a substantial, comprehensive, authoritative, critical, and general-interest review, placed at the cross section of two broad, interconnected, practical, and extremely dynamic fields, namely, the fields of membrane separation and molecularly imprinted polymers. This review describes the recent discoveries that appeared after repeated and fertile collisions between these two fields in the past three years, to which are added the worthy acknowledgments of pioneering discoveries and a look into the future of molecularly imprinted membranes. The review begins ...
208 citations
TL;DR: This study discusses a novel and simple method for the preparation of magnetic dummy molecularly imprinted nanoparticles (MDMINPs) constructed via the sol-gel strategy using APTMS as the functional monomer.
178 citations
TL;DR: The Fe3O4@MIPs showed a fast adsorption equilibrium, a highly improved imprinting capacity, and significant selectivity; they could be used as a solid-phase extraction material and detect illegal addition Rhodamine B in food.
148 citations
TL;DR: The Fe3O4 nanoparticles prepared in this study have good biocompatibility and are suitable for further application in tumor hyperthermia.
Abstract: Background
The objective of this study was to evaluate the synthesis and biocompatibility of Fe3O4 nanoparticles and investigate their therapeutic effects when combined with magnetic fluid hyperthermia on cultured MCF-7 cancer cells.
123 citations