JOURNAL OF POLYMER RESEARCH
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2024
·Vol. 31
·期 9
·1-18
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IF 2.6
Xu Wan,Zhang Huijuan,Huo Ting,Xiang Yongsheng,Ou Xiaojian,Sun Yuan,Sun Yuanjun,Chen Zhenbin
The excellent physical and chemical properties of palladium(Pd) have made its application and demand increase gradually. Therefore, it is important to develop a new material to efficiently separate and purify palladium from secondary sources to ensure its supply. In this work, a thermosensitive palladium smart imprinted polymer(Pd-T-SIP) was synthesized, which could achieve the efficient separation and purification of Pd. The microstructure and morphology of Pd-T-SIP were characterized. The experimental results showed that the Pd-T-SIP showed the maximum adsorption amount( Q ) of 0.1022 mmol/g for Pd(IV), the desorption rate( D ) was 83.09%, and it had good reusability. Theoretical studies showed that the adsorption process of Pd-T-SIP was suitable to be described by quasi-first-order model and Langmuir model, which indicated that the adsorption of Pd-T-SIP was monolayer adsorption. Finally, Pd-T-SIP was applied to the platinum group catalyst leach solution, and it could be found that its adsorption/desorption effect was more excellent, with its adsorption amount reaching 0.1558 mmol/L, desorption rate reaching 77.14%, and the palladium purity after one adsorption/desorption cycle increased from 13.75% to 30.62%, and the purity of platinum group metals increased from 40.29% to 73.56% after one adsorption/desorption cycle.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
MICROCHIMICA ACTA
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2015
·Vol. 182
·期 9
·1791-1796
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IF 3.741
Li Lu,Lin Zheng-zhong,Chen Xiao-mei,Zhang Hong-yuan,Lin Yi-dong,Lai Zhu-zhi,Huang Zhi-yong
Molecularly imprinted polymer (MIP) particles for malachite green (MG) were prepared by emulsion polymerization using methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the cross-linker, and a combination of Span-80 and Tween-80 as an emulsifier. The MIP particles were characterized by SEM micrographs and FT-IR spectra. Their binding capacity for MG was evaluated based on kinetic and isothermal adsorption experiments and compared to non-imprinted polymer particles. Analytical figures of merit include an adsorption equilibrium time of 15 min, an adsorption capacity of 1.9 mg∙g‾ 1 in acetonitrile-water (20:80), and an imprinting factor of 1.85. The MIP particles were successfully applied to the extraction of MG from fish samples spiked with MG and the other interfering substances prior to its determination of MG by HPLC. Spiked samples gave recoveries of MG that ranged from 86 to 104 %, much higher than that of the other interfering substance.
Molecularly imprinted polymer particles for malachite green (MG) were prepared by emulsion polymerization. They show adsorption capacity of 1.9 mg∙g‾¹ with imprinting factor of 1.85, and were successfully applied to the extraction of MG from spiked fish samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 48
·18046-18059
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IF 4.5
Yao Yao,Xie Wenzheng,Shen Yinzhuo,Ning Kangping,Li Hongbo,Hu Xiao-Ya,Xu Qin
Adsorption membranes have the widespread and large scale use for pollution removal with promising prospects and better efficacy than powder adsorbents. However, the low adsorption capacity and non-selectivity, reusability hindered its application. In this work, commercial carbon felt (CF) functionalized with molecularly imprinted polymers (CF-MIP) was prepared to address the environmental issues brought by bisphenol A (BPA) in aqueous water. MIPs with low cost, good selectivity, long stability and reusability were tailored on the three-dimensional carbon felt (CF). The parameters including the solvents, cross-linker amount and the polymerization time for the preparation of CF-MIM as well as the selectivity and reusability of CF-MIM have been studied. The Pseudo-second-order kinetic and Langmuir isotherm model presented the most optimal fit to the experimental data in comparison to other models. The CF-MIM had a high binding capacity of 27.81 mg/g and retaining 80% of its original adsorption ability after five reuse cycles. This work will promote the development of functional CF with good selectivity and considerable stability for environmental application. Graphical abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Analytical Methods
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2025
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IF 2.6
Yiwei Sun,Yuting Luo,Haoxiang Wang,Yuyang He,Ruoyu Wang,Mengqi Lu,Dongpo Xu
An efficient electrochemical molecularly imprinted sensor for the detection of tetracycline (TC) was prepared using ZnO/MIP. ZnO nanomaterials with large surface area improved the electrochemical detection performance and also increased the binding sites of the TC molecularly imprinted polymeric membrane. The TC molecularly imprinted polymeric membrane with pyrrole as the functional monomer specifically binds to TC and thus detects TC in the sample. In this study, the electrochemical performance of ZnO/MIP was evaluated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under the optimal conditions, ZnO/MIP showed a wide detection range. The detection range was 0.1–100 nM, and the detection limit was 0.02 nM with R2 reaching 0.9974. ZnO/MIP has good selectivity, stability, and reproducibility. The recovery of tetracycline in milk was 97–112%.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Chengyu Jin,Siyuan Chen,Jue Ding,Qin Ye,Xianghe Meng
Sciadonic acid (SA, Δ5,11,14–20:3) is an unusual fatty acid found in Torreya grandis kernel oil with significant health benefits and functional value. However, obtaining high-purity SA from crude oil remains a challenge. In this study, we developed an efficient, eco-friendly, and selective method for SA enrichment using silver ion (Ag + )-loaded molecularly imprinted polymers (MIPs). Methacrylic acid (MAA) was selected as the functional monomer, with SA as the template molecule and AgNO 3 as the complexing agent. The polymerization was carried out using reversible addition-fragmentation chain transfer (RAFT)-modified Fe 3 O 4 @SiO 2 . Furthermore, adsorption studies revealed that the process followed the Langmuir isotherm model, while the adsorption kinetics were best described by the Pseudo-second-order model, with a maximum binding capacity of 97.04 mg/g. Then, Optimization experiments showed that the highest adsorption efficiency (84.62 %) was achieved using 20 mg of MIPs at 30 °C for 30 min. Desorption was most effective with n-hexane/acetic acid (9:1, v/v) for 8 h, yielding a desorption efficiency of 70.65 %. As a result, the final SA purity reached 93.11 %, with a recovery rate of 65.03 %. This novel Ag + -loaded MIPs strategy provides a rapid, selective, and environmentally friendly approach for SA enrichment, demonstrating the great potential for industrial application.
研究领域:
食品科学
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生物化学
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产品关联
DOI
高影响因子
Talanta Open
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2025
·
IF 3.7
Xiao-Chen Huang,Shou-Lian Wei,Su Yao,Yu-Tong Lin,Jin-Kui Ma
This study developed a novel dummy molecularly imprinted polymer (DMIP) via emulsion polymerization for rapid, sensitive, and simultaneous detection of four fluoroquinolone (FQ) antibiotic residues in tilapia. The DMIP, coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), was thoroughly characterized for its structure and adsorption properties. Optimized parameters revealed a rough surface morphology with aggregated spherical structures (400-500 nm). Compared to a non-imprinted polymer (NIP), the DMIP exhibited faster adsorption kinetics and enhanced selectivity towards enrofloxacin and related FQ compounds. The DMIP-UPLC-MS/MS method achieved satisfactory recoveries (77-105%) for the four target FQs in tilapia, with intra-day and inter-day relative standard deviations of 3.6-9.2% and 4.0-11.7%, respectively. Method detection limits (LODs) ranged from 0.02-0.06 µg/kg, while quantification limits (LOQs) ranged from 0.06-0.2 µg/kg. This novel method demonstrates excellent potential for highly sensitive and selective monitoring of trace FQ residues in aquatic food products.
研究领域:
分析化学
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食品安全
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环境科学
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DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2014
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IF 2.829
Yun Lei,Guanhong Xu,Fangdi Wei,Jing Yang,Qin Hu
A molecularly imprinted polymer coated stir bar (MIP-SB) using dopamine as a template was fabricated. The adsorptive capacity of the MIP-SB was almost 4 times over that of non-imprinted stir bar. The MIP-SB showed good extracting selectivity for dopamine when used to adsorb dopamine and its analogs. An analytical method to determine dopamine in urine sample was established by combining MIP-SB sorptive extraction with HPLC-fluorescence detector. The linear range of dopamine concentration was 0.378–18.9 ng/ml with correlation coefficient of 0.9990, and the limit of quantification was about 0.0945 ng/ml (S/N = 10). The recoveries of dopamine with spiked urine samples at three different levels were between 92.3 and 106.9%, and the relative standard deviations were within 13.2% ( n = 3). The method is simple and suitable for the determination of dopamine in human urine for clinical application.
研究领域:
分析化学
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医学
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DOI
PubMed
高影响因子
Desalination and Water Treatment
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2016
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IF 1.272
Li Yang,Yao Chen,Jiangdong Dai,Naichao Si,Yongsheng Yan
Thermosensitive/magnetic molecularly imprinted polymers (TM-MIPs) were prepared by Pickering emulsion polymerization. With this method, SiO2 nanoparticles were used as the Pickering emulsion stabilizer, N-isopropylacrylamide functioned as the thermosensitive monomer participating in co-polymerization, and bifenthrin (BF) acted as the template molecule. The results of the characterizations demonstrated that the TM-MIPs were porous and magnetic inorganic/polymer composite microparticles with magnetic sensitivity (Ms = 0.7921 emu g−1), thermal stability (below 473 K), and magnetic stability (over the pH range of 2.0–8.0). TM-MIPs were used as sorbents to remove bifenthrin (BF), and then were swiftly split in magnetic field. The Freundlich isotherm model preferably matched with the experimental data. The adsorption kinetic of the TM-MIPs was primely fitted by the pseudo-second-order, indicating that the chemical reaction could be the rate-limiting step in the process of BF absorption. The selective recognition experiments exhibited that the TM-MIPs have obvious effect on selective adsorption of BF with diethyl phthalate and fenvalerate. In aqueous solutions, the adsorption of BF onto the TM-MIPs had response to temperature, and could be used for adsorbing and separating bifenthrin.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2017
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IF 4.95
Jing-ru Wei,Yan-li Ni,Wei Zhang,Zhi-qi Zhang,Jing Zhang
A novel strategy based on the fluorescent molecularly imprinted polymers (FMIP) for specific recognition and sensitive sensing glycoprotein from biological samples was developed. The FMIP prepared by introducing a fluorescent boronic acid quinoline-based on the P GMA/EDMA bead surface and assembled a glycoprotein molecularly imprinted polymer using surface imprinting technology . The resultant material showed specific recognition to model glycoprotein. At the same time, the change of fluorescence caused by the amount of model glycoprotein could achieve quantitative determination . The method provided a good linear relationship of the concentrations of HRP in the range of 0.05–1 μM, and the detection limit was 0.02 μM. It is 10 times lower than the previous fluorescence nanosensor for glycoprotein. The established method combined the desired selectivity of molecularly imprinted polymers and high sensitivity of fluorescence spectroscopy . The influence of background impurities could be effectively eliminated. The outstanding features guarantee that it can be successfully applied to detect glycoprotein from biological samples under physiological conditions.
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Guoqiang Li,Fei Peng,Gege Zhao,Yuanpu Zhang,Cunming Hu,Pengfei Geng,Ming Guan,Fang Mi,Ying Wang,Guotong Chen
Chloramphenicol (CAP) is a potent antibiotic used to treat infections in livestock and humans, but its residues can be hazardous to human health. In this study, amino-modified Fe 3 O 4 nanoparticles were prepared by a single-pot method, and magnetic molecularly imprinted materials were prepared by self-polymerization for imprinting with CAP . The imprinted thin layer was prepared by polymerization of dopamine (DA) and 3-aminophenylboronic acid (APBA) copolymers, which improved the elution efficiency of the template. Dopamine generated under alkaline conditions replaces the crosslinker and can be adsorbed on the surface of magnetic carriers. The aromatic groups in dopamine make it difficult to degrade and fall off after adsorption on the magnetic carrier surface. The maximum adsorption amount of CAP on magnetic materials was 6.5 mg/g. After several adsorption cycles, the CAP-MMIPs still had good stability. The results showed that the method can both specifically recognize and enrich the separation of the target antibiotics, which greatly reduced the pretreatment time of the samples and provided a new approach for the pretreatment of CAP.
研究领域:
环境科学
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分析化学
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材料科学
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DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Die Gao,Dan-Dan Wang,Qi-Feng Fu,Lu-Jun Wang,Kai-Lian Zhang,Feng-Qing Yang,Zhi-Ning Xia
In present study, magnetic molecularly imprinted polymers (MMIPs) were successfully prepared for specific recognition and selective enrichment of phloridzin from the leaves of Malus doumeri (Bois) A. Chev and rats' plasma. The magnetic Fe 3 O 4 were prepared by the solvothermal reaction method and followed by the modification of TEOS and functionalization with APTES . Using functionalized Fe 3 O 4 particles as the magnetic cores, phloridzin as template, ethylene glycol dimethacrylate (EGDMA) as cross-linker and 2,2-azobisisobutyonnitrile (AIBN) as initiator, the MMIPs were prepared through APTES to associate the template on the surface of the magnetic substrate. The structural features and morphological characterizations of MMIPs were performed by FT-IR, SEM, TEM, XRD, TGA and VSM . The adsorption experiments revealed that the MMIPs presented high selective recognition property to phloridzin. The selectivity experiment indicated that the adsorption capacity and selectivity of polymers to phloridzin was higher than that of baicalin and 2,3,5,4′-ttrahydroxy stilbene-2-O-β-D-glucoside. Furthermore, the MMIPs were employed as adsorbents for extraction and enrichment of phloridzin from the leaves of M. doumeri and rats' plasma. The recoveries of phloridzin in the leaves of M. doumeri ranged from 81.45% to 90.27%. The maximum concentration (C max ) of phloridzin in rats' plasma was detected as 12.19 ± 0.84 μg/mL at about 15 min after oral administration of phloridzin (200 mg/kg). These results demonstrate that the prepared MMIPs are suitable for the selective adsorption of phloridzin from complex samples such as natural medical plants and biological samples.
研究领域:
药学
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分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
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IF 4.916
Rui Zhang,Tianji Zhang,Yongqin Lv,Peiyong Qin,Hongmei Li,Jin-ping Li,Tianwei Tan
Heparin is a highly sulfated polysaccharide , applied in clinic for treatment of thrombotic diseases. The biological activity is closely related to its molecular structure e.g. compositions of disaccharides and oligosaccharides units. The classical method to isolate the oligosaccharides after depolymerization by heparinases or nitrous acid I s by size exclusion chromatography which is a time-consuming process. In this study, we explored the possibility for rapid separation of oligosaccharides using a novel polymer material. The magnetic thermoresponsive molecularly imprinted polymers (MIPs) were synthesized using heparin disaccharide as a template, AEM, NIPAAm, and AAm as functional monomer , and MBAA as crosslinker by surface radical polymerization in an aqueous media. Incubation of the MIP with hepairn oligosaccharides demonstrated specific binding to the template molecule. This binding to the targeted molecule was affected by reaction temperature with regard to binding capacity and specificity. The recognition specificity and selectivity can be modulated by varying the compositions of multi-functional monomers. The pseudo-second-order kinetic model and Langmuir isotherm model provide the best fit to the equilibrium adsorption of heparin disaccharides by MIPs. The results suggest that the new material can be used for rapid separation of di- and tetra-saccharides of heparin, which can also be adapted to the applications for isolation of oligosaccharides from other polysaccharides, e.g. heparan sulfate and chondoriting sulfate.
研究领域:
生物化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
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