CHROMATOGRAPHIA
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2013
·Vol. 76
·期 9
·459-465
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IF 1.437
Peng Xi-Tian,Feng Yu-Qi,Hu Xi-Zhou,Hu Ding-Jin
In this paper, a novel hydrophilic neomycin-bonded silica (Silica-NC) stationary phase for hydrophilic-interaction chromatography (HILIC) was prepared with cyanuric chloride as coupling agent. The resulting Silica-NC stationary phase was characterized by Fourier transform infrared spectroscopy and elemental analysis to prove the successful immobilization of neomycin on the surface of silica gel. A set of analytes with different properties were selected to investigate the chromatographic characteristics of the Silica-NC stationary phase under HILIC mode. The effects of mobile phase variables such as organic modifier content, ionic strength and pH values on the chromatographic behaviors of testing probes were investigated in detail. The results demonstrated that the Silica-NC phase behaved as a chromatographic packing with hydrophilic-interaction and ionic-interaction. Finally, the effective separations of nucleosides and bases, organic acids, cytokinins and sulfanilamides were achieved on the Silica-NC stationary phase under HILIC mode, indicating the excellent application potential of our developed hydrophilic Silica-NC stationary phase.
研究领域:
分析化学
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色谱技术
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2015
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IF 4.529
Chiyao Bai,Meicheng Zhang,Bo Li,Yin Tian,Shuang Zhang,Xiaosheng Zhao,Yang Li,Lei Wang,Lijian Ma,Shoujian Li
Cyanuric chloride was chosen as a core skeleton which reacted with desired linker molecules, urea, thiourea and thiosemicarbazide, to prepare three novel functional covalent triazine-based frameworks, CCU (O-donor set), CCTU (S-donor set) and CCTS (S, N-donor set) respectively, designed for selective adsorption of U(VI). The products have high nitrogen concentration (>30 wt%), regular structure, relatively high chemical and thermal stability. Adsorption behaviors of the products on U(VI) were examined by batch experiments. CCU and CCTU can extract U(VI) from simulated nuclear industrial effluent containing 12 co-existing cations with relatively high selectivity (54.4% and 54.2%, respectively). Especially, effects of donor atoms O/S on adsorption were investigated, and the outcomes indicate that the difference in coordinating ability between the donor atoms is weakened in large conjugated systems, and the related functional groups with originally very strong coordination abilities may not be the best choice for the application in selective adsorption of uranium and also other metals. The as-proposed approach can easily be expanded into design and preparation of new highly efficient adsorbents for selective separation and recovery of uranium through adjusting the structures, types and amounts of functional groups of adsorbents by choosing suitable linkers.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
PubMed
高影响因子
CHINESE CHEMICAL LETTERS
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2014
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IF 1.178
Wei Wang,Ye Yuan,Fu-Xing Sun,Guang-Shan Zhu
Novel porous aromatic frameworks (PAF-53 and PAF-54) have been obtained by the polymerization of amino compound ( p -phenylenediamine and melamine) and cyanuric chloride. They display a certain amount of CO 2 adsorption capacity and highly selective separation of CO 2 /CH 4 and CO 2 /N 2 as 18.1 and 83 by Henry Law respectively. They may be applied as ideal adsorbents to separate and capture CO 2 .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
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2016
·Vol. 53
·期 6
·595-600
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IF 0.678
Ruixia Niu,Chao Wang,Hua Song,Jingling Wang,Daqiang Wang,Weidong Ren
A series of novel dialkyl disulfonate Gemini surfactants (C n -GSBS, n = 8, 12, 14, 16, n is the carbon number of the hydrophobic chain) was synthesized from cyanuric chloride, aliphatic amine, ethylenediamine, N,N'-dimethyl-1,3-propyldiamine and sodium 2-chloroethanesulfonate. The chemical structures of the prepared compounds were confirmed by FT-IR and 1 H NMR. The critical micelle concentrations (CMC) in aqueous solutions at 25°C were determined by surface tension method. The CMC value decreased with increasing length of the carbon chain. The CMC reached a minimum as low as 5 × 10 −5 mol · L −1 for C 16 -GSBS. The interfacial tensions (IFT) between Daqing crude oil and C n -GSBS surfactant solutions were also measured. The effects of the concentration of Na 2 CO 3 , the concentration and carbon chain length of C n -GSBS on the IFT of crude oil-water were investigated in detail. The results show that, for the aqueous surfactant system containing the weak base Na 2 CO 3 , oil-water interfacial tension can be reduced to 10 −2 mN m −1 orders of magnitude. The results also indicate that with the increase of surfactant concentration and the chain length, the oil-water interfacial tension decreased markedly, which indicates that C n -GSBS surfactants have a good interface activity. These surfactants are good candidates for weak base-surfactant-polymer EOR process.
研究领域:
化学工程
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石油工程
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DOI
高影响因子
Membranes
·
2025
·Vol. 15
·期 8
·231
·
IF 3.6
Zhuangzhuang Tian,Yun Yin,Jiandong Wang,Xiuling Ao,Daijun Liu,Yang Jin,Jun Li,Jianjun Chen
Nanofiltration (NF) is considered a competitive purification method for acidic stream treatments. However, conventional thin-film composite NF membranes degrade under acid exposures, limiting their applications in industrial acid treatment. For example, wet-process phosphoric acid contains impurities of multivalent metal ions, but NF membrane technologies for impurity removal under harsh conditions are still immature. In this work, we develop a novel strategy of acid-resistant nanofiltration membranes based on interfacial polymerization (IP) of polyethyleneimine (PEI) and cyanuric chloride (CC) with the s-triazine ring. The IP process was optimized by orthogonal experiments to obtain positively charged PEI-CC membranes with a molecular weight cut-off (MWCO) of 337 Da. We further applied it to the approximate industrial phosphoric acid purification condition. In the tests using a mixed solution containing 20 wt% P2O5, 2 g/L Fe3+, 2 g/L Al3+, and 2 g/L Mg2+at 0.7 MPa and 25 °C, the NF membrane achieved 56% rejection of Fe, Al, and Mg and over 97% permeation of phosphorus. In addition, the PEI-CC membrane exhibited excellent acid resistance in the 48 h dynamic acid permeation experiment. The simple fabrication procedure of PEI-CC membrane has excellent acid resistance and great potential for industrial applications.
研究领域:
材料科学
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膜技术
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环境工程
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化学工程
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纳滤
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耐酸性
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Kayode Hassan Lasisi,Weihao Yao,Qiang Xue,Qin Liu,Kaisong Zhang
Acid-resistant nanofiltration (NF) membranes with both improved permeability and acid stability are in desperate demand for acidic wastewater treatment . Herein, we report a novel polyamine-based nanofiltration membrane with improved flux and excellent acid stability prepared via interfacial cross-linking polymerization reaction of branched polyethyleneimine (BPEI) and 1,4-benzenecarboxylic acid (TPA) with cyanuric chloride (CC) on porous polysulfone support. Evaluated using various characterization techniques, the optimized NF membrane achieved at 1.0% (w/v) BPEI, 0.10% (w/v) CC and 0.15 g/L TPA at 90 °C for 10 min exhibited high rejection of different model salt solutions in the order MgCl 2 > Na 2 SO 4 > NaCl, with excellent permeation flux up to 12.8 LMHbar −1 . Furthermore, membrane exhibited good acid stability even at extreme conditions. After exposure to 25% (w/w) H 2 SO 4 and 5% (w/w) HNO 3 acid solutions at 25 °C, 55 °C and 80 °C for 720 h, 72 h and 24 h respectively, the fluxes increased with a slight decline in their rejection levels. Meanwhile, a long hour stability test slightly dropped the MgCl 2 rejection level by ∼10%. The dynamic CuSO 4 /H 2 SO 4 mixed solution acid test of the membrane also revealed good permselectivity. This fabricated membrane thus provides a prospect of good application in acidic wastewater treatment and acid recovery process.
研究领域:
化学工程
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环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2021
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IF 4.759
Yaxing Guo,Juntao Wang,Lin Hao,Qiuhua Wu,Chun Wang,Zhi Wang
A triazine-based porous organic polymer was prepared by facile solvothermal polymerization with cyanuric chloride and triphenyl phosphine as functional monomers. The polymer was characterized and then used for the first time as the sorbent for the effective solid-phase extraction of some nitroimidazoles (NDZs) (metronidazole, ronidazole, secnidazole, dimetridazole and ornidazole). The main experimental influencing parameters for the extraction including the eluent solvent, eluent volume, sample loading rate, sample solution pH, salt concentration and sample volume were investigated. The adsorption kinetics and adsorption isotherms were investigated to elucidate the possible adsorption mechanism. With the triazine-based porous organic polymer as the SPE adsorbent, trace NDZs were effectively extracted. The good enrichment capability for the NDZs was mainly attributed to the hydrogen binding interactions by the aromatic 1,3,5-trizine rings. After the SPE, the extracted analytes were analyzed by high-performance liquid chromatograph with ultraviolet detection. Under the selected conditions, the method had a good linear response for the analytes in the range of 0.06-120 ng mL −1 for water and 1.5-1200 ng g −1 for honey samples. The limits of detections (S/N=3) fell in the range of 0.02-0.06 ng mL −1 for water and 0.5-1.5 ng g −1 for honey samples. The method recoveries for the analytes for spiked samples were in the range of 80.3-118%. The method can be applied for the determination of the NDZs from real samples.
研究领域:
分析化学
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环境科学
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食品科学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 23
·9145-9151
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IF 3.069
Chanjuan Liu,Chao Li,Qingfeng Niu,Chao Cai,Guoyun Li,Guangli Yu
Carbohydrate microarrays provide a powerful tool for high-throughput analysis of carbohydrate-mediated interactions. In this work, they were fabricated on poly(2-hydroxyethyl methacrylate) (pHEMA)-cyanuric chloride (CC)-modified substrates for the analysis of carbohydrate–lectin interactions. The pHEMA polymer provides an anti-fouling surface and the CC linker allows the covalent immobilization of intact carbohydrates. Carbohydrates of different sizes (mannose, glucose, galactose, maltose, and dextran) were successfully immobilized on the proposed substrates and their recognition specificity with concanavalin A (ConA) was highly conserved. Compared with a 4-hydroxyphenylacetic acid (HPA)-CC-based microarray, the proposed pHEMA-CC-based microarray exhibits better anti-nonspecific adsorption ability, higher carbohydrate loading capability, stronger multivalent recognition and a lower limit of detection for carbohydrate and lectin without any further signal amplification. The application of the proposed microarray was validated by studying carbohydrate-influenza A virus H1N1 hemagglutinin interactions and fabricating microarrays containing carbohydrates with different properties. It is possible to extend it to study interactions of more carbohydrates and different lectins, and it will meet the wider needs in bioanalytical and biomedical application.
研究领域:
生物化学
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分析化学
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生物技术
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分子生物学
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高影响因子
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