RSC Advances
·
2020
·Vol. 10
·期 61
·36971-36979
·
IF 3.119
Hua Tian,Yongcheng Dai,Wenzhe Fu,Haifang Liu,Mengting Li,Meiyuan Lv,Xueqiong Yin
In this work, a multifunctional ratiometric fluorescence (FL) nanohybrid (CSCDs@DC) was synthesized from chitosan based carbon dots (CSCDs) and dansyl chloride (DC) at room temperature. The CSCDs@DC revealed strong FL intensity, great stability and excellent anti-photobleaching properties. Herein, CSCDs@DC was responsive to pH value in the range of 1.5–4.0 and exhibited color-switchable FL properties between acidic and alkaline environments. In addition, CSCDs@DC showed good selectivity and sensitivity towards Fe3+ ions. A good linear relationship for the Fe3+ ion detection was obtained in the range from 0 μM to 100 μM, with a detection limit of 1.23 μM. What's more, CSCDs@DC can be used as a fluorescent ink. It expressed superior optical properties after 3 months of storage or continuous exposure to UV light for 24 h. This study suggested that CSCDs@DC had potential in the detection of pH and metal ions, as well as showing promising application in the anti-counterfeiting field.
研究领域:
材料科学
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分析化学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2012
·
IF 3.85
Meihong Liu,Guohua Yao,Qibo Cheng,Miao Ma,Sanchuan Yu,Congjie Gao
Acid stable thin-film composite membrane for nanofiltration was fabricated by interfacial polymerization of naphthalene-1,3,6-trisulfonylchloride (NTSC) and piperazine (PIP) on porous polysulfone support membrane. The performance of the membrane was optimized by studying the preparation parameters including monomer content, reaction temperature and additive in organic phase. The separation performance of the resultant membrane was evaluated through permeation experiments, the membrane property was characterized by ATR-FTIR, XPS AFM , SEM and streaming potential measurements, and the acid stability was investigated through both static acid soaking tests and long-term permeation tests under acidic condition. After exposure to 20%(w/v) H 2 SO 4 for 2 months or running with 4.9%(w/v) H 2 SO 4 for 60 day, the PIP-NTSC composite membrane showed minor change in separation performance and no evident chemical change in the active skin layer, indicating that the developed membrane possessed good acid stability. The desired membrane exhibited a pure water permeability of about 5.8 l/m 2 h bar, a MWCO of as high as 5000 Da, and an attractive solute rejection of higher than 86.5% for a feed containing 500 mg/l Na 2 SO 4 at 0.5 MPa. Furthermore, the PIP-NTSC composite membrane could be used to treat acidic effluents from metal industries with good perm-selectivity and long-term stability.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wei Lai,Lu Liu,Ju Bai,Luqi Xiao,Yang Jiao,Youming Yang,Linglong Shan,Shuangjiang Luo
The fabrication of highly acid-resistant nanofiltration (NF) membranes with excellent separation performance via interfacial polymerization remains challenging due to the lack of precise pore architecture manipulation. Herein, novel acid-resistant nanofiltration membranes were fabricated based on benzene-1,3,5-trisulfonyl chloride (BTSC), which holds the characteristic resonant π-backbonding structure and high steric hindrance, by interfacial polymerizing with polyethyleneimine (PEI) and piperazine (PIP) on the polyethersulfone (PES) substrate. The as-prepared PIP-BTSC/PES and PEI-BTSC/PES membranes displayed sub-nanometer pore sizes of 0.62 and 0.65 nm, respectively, with much narrower pore size distribution than the conventional acid-resistant NF membranes. Notably, the PEI-BTSC-H/PES membrane exhibited an MgCl 2 rejection of 95.5 % and a high permeance of 43.5 L h -1 m −2 bar −1 . Besides, the PEI-BTSC/PES membrane exhibited excellent acid-resistance in the 72-day static acid soaking test and dynamic acid permeation experiment. Density functional theory calculation revealed that the outstanding acid-resistance of BTSC was ascribed to the much higher hydrolyzation energy barrier of the polysulfonamide than conventional polyamide.
研究领域:
材料科学
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化学工程
·
环境科学
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 2
·347
·
IF 4.2
Fangli Du,Xuequan Xian,Peiduo Tang,Yanming Li
A sulfonyl-chloride-modified lignin-based porous carbon-supported metal phthalocyanine catalyst was prepared and used to replace the traditional Fenton’s reagent for lignin degradation. The catalyst underwent a detailed characterization analysis in terms of functional group distributions, surface area, morphological structure, via FT-IR, XPS, BET, and SEM. The catalyst possessed a specific surface area of 638.98 m2/g and a pore volume of 0.291 cm3/g. The prepared catalyst was studied for its ability of oxidative degradation of lignin under different reaction conditions. By optimizing the reaction conditions, a maximum liquid product yield of 38.94% was obtained at 135 °C with 3.5 wt% of catalyst and 15 × 10−2mol/L H2O2; at the same time, a maximum phenols selectivity of 32.58% was achieved. The compositions and properties of liquid products obtained from lignin degradation using different catalyst concentrations were studied comparatively via GC-MS, FT-IR,1H-NMR, and EA. Furthermore, the structure changes of solid residues are also discussed.
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 59
·54377-54381
·
IF 3.289
Dingyi Wang,Shengmei Guo,Rongxing Zhang,Sen Lin,Zhaohua Yan
An efficient procedure for the formation of C–S bonds via C–H functionalization was developed for the synthesis of aryl sulfides in good to excellent yields using TBAI–HBr system promoted direct sulfenylation of various compounds, such as phenols, pyrazolones, indoles and related heteroarenes. Low cost and widely available arylsulfonyl chlorides were used as the sulfur source to provide various sulfur-containing compounds. The characteristic of the present protocol is convenient, green, highly efficient with a wide-application and short reaction time.
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
Journal of Materiomics
·
2021
·
IF 6.425
Hui Zhou,Jian Han,Xingyu Pu,Xuanhua Li
Sb 2 S 3 is a promising photovoltaic absorber with appropriate bandgap, excellent light absorption coefficient and great stability. However, the power conversion efficiency (PCE) of Sb 2 S 3 planar thin film solar cells is unsatisfactory for further commercial application due to low crystallinity and high resistivity of Sb 2 S 3 film. Here, we introduce an additive of 4-Chloro-3-nitrobenzenesulfonyl Chloride (CSCl) to alleviate these problems. The CSCl molecular contains two terminal Cl with lone pair electrons, which have the interaction with Sb atoms. Thus, the Sb 2 S 3 film with enhanced crystallization and low trap states has been obtained and the resistivity is also decreased. Furthermore, CSCl additive raises the Fermi level of the Sb 2 S 3 film, thereby enhancing the transport of electron from Sb 2 S 3 to TiO 2 . Consequently, the optimal PCE of Sb 2 S 3 solar cells is raised from 4.20% (control device) to 5.84%. Our research demonstrates a novel additive to enhance the photoelectric performance of Sb 2 S 3 solar cells.
研究领域:
材料科学
·
太阳能电池技术
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DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2021
·Vol. 44
·期 16
·3052-3060
·
IF 3.645
Cuicui Guo,Xueqin Zhao,Jing Jin,Longxing Wang,Dongqin Tan,Jiping Chen,Yuwen Ni
Human exposure to bisphenols has rarely been reported. The most important challenges in this regard are the sensitivity and accuracy of the analytical methods employed. Dansyl chloride derivatization prior to high-performance liquid chromatography–tandem mass spectrometry has been prevalently employed to improve sensitivity. However, the dose effect of the derivatization reagent on the reaction products is not well understood, especially for reactants with two or more active groups. This study investigated the mass ratio of dansyl chloride to bisphenols and found the mass ratio played a vital role in changing the composition of derivatives; further, the optimal ratio for obtaining di-substituted derivatives was confirmed. Under optimal conditions, solid-phase extraction followed by dansyl chloride derivatization coupled with high-performance liquid chromatography–tandem mass spectrometry was used to detect eight bisphenols in human serum samples. The method detection limits of the eight bisphenols were 0.025‒0.28 ng/mL, and the recoveries were 72.9‒121.7% by spiking bisphenols (2, 5, and 20 ng/mL) into bovine serum. The detection frequencies of bisphenol A and bisphenol F in 73 serum samples obtained from children from Guangzhou were 41.1% and 71.2%, respectively, while the detection frequencies of other bisphenols were below 20%. The concentrations of bisphenol A and bisphenol F were < 0.28‒8.0 ng/mL and < 0.028‒7.6 ng/mL, respectively.
研究领域:
分析化学
·
环境科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Xiaoqian Chen,Qingxiang Wang,Liheng Wang,Hongxu Guo,Yizhen Yang,Feiming Li,Feng Gao
Rugby-ball-shaped CoS2 (rCoS2) submicroparticles have been synthesized via a simple hydrothermal reaction. The rCoS2 submicroparticles were then casted on a glassy carbon electrode and served as a highly conductive and large surface area platform for the electrosynthesis of poly(2-thiophenesulfonyl chloride) (pTSC), using 2-thiophenesulfonyl chloride as the monomer. The stepwise modification process was characterized by attenuated total reflectance–Fourier transform infrared spectroscopy (ATR-FTIR) and different electrochemical technologies. The stable pTSC layer was utilized as a functional interface to immobilize amino-modified probe DNA via a facile sulfonyl–amino condensation reaction, without the assistance of any other cross-linkers. Because of the synergistic effect of rCoS2 and pTSC from the hybrid material, the developed DNA biosensor could detect target DNA over a wide dynamic range, from 1.0 × 10–13 to 1.0 × 10–7 M, with the detection limit down to 1.1 × 10–14 M. Benefiting from the steady electropolymerization film of pTSC and the stable sulfamide bond between the amino-modified DNA and pTSC, the biosensor also showed high stability, reusability, and reproducibility.
研究领域:
生物化学
·
材料科学
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Yunhao Li,Shuhao Wang,Xiaoxiao Song,Yong Zhou,Hongmei Shen,Xingzhong Cao,Peng Zhang,Congjie Gao
The removal of small and neutral boron molecules from seawater remains a critical challenge in energy-saving and low-cost desalination. In this paper, a high boron removal reverse osmosis (RO) membrane was designed by embedding sulfonyl moleculars in the polyamide (PA) network. The swelling PA structure has enlarged free volumes. It would induce more facile penetration of 4-nitrobenzenesulfonyl chloride (NBS). Evaporation of solvent molecules contracts the PA network and leads to the fixation of the NBS molecules into the PA network. The swelling of the polyamide network was studied systematically. The most suitable swelling solvent was selected based on the solubility parameter and the restoration capability. The “swelling-embedding-shrinking (SES)” strategy reconstruct the free volume of PA chains. It resulted in significantly higher rejection of neutral boron molecules due to enhanced steric hindrance by embedded NBS plugs and synergistic exclusion effect by –SO 3 H groups. Meanwhile, the alteration of membrane composition and structure were kept minimal. Further, the impacts of key determining factors (polarity, steric hindrance, and affinity) on boron separation performance were systematically analyzed by boron-containing compounds with different numbers of hydrogen bonding sites (or dipole moments) or molecular volumes. Under simulated seawater conditions, the boron rejection of the SES modified reverse osmosis membranes increased from 82.12% to 93.10%, and the salt rejection rate increased to 99.57%. Our study shows that the swelling induced embedding of NBS molecules can be readily adopted to regulate the permselectivity of the PA layer towards removal of boron species.
研究领域:
材料科学
·
化学工程
·
环境科学
·
海水淡化技术
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产品关联
DOI
高影响因子
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2021
·Vol. 247
·期 11
·2729-2738
·
IF 2.998
Chang Rui,Ma Chong,Yu Chao,Zhang Qiang,Li Yanxin,You Jinmao,Zhang Shijuan
Estrogens in milk samples were extracted by a new ionic liquid (IL)-modified covalent organic framework (COF), and then analyzed by stable isotope labeling (SIL) method using dansyl chloride (DNS-Cl) and d 6 -dansyl chloride (d 6 -DNS-Cl) as SIL agents. The IL-modified COF (TpPa-Ct@Mi) was synthesized by chemically bonding methylimidazole on to the surface of normal COF to make full use of the high surface area and big conjugated structure of COF, and the abundant charge of IL, which are of crucial importance for adsorption. The synthesized COF can form π–π interactions and hydrophobic effect with estrogens, while the IL can form electrostatic interactions with the analytes. It was applied to the dispersive solid-phase extraction (DSPE) of estrogens in milk samples. The extracted estrogen samples were heavy labeled by d 6 -DNS-Cl, and then mixed with the light labeled standard. Samples and standards were mixed and analyzed in a single run, and thus the matrix effect was greatly minimized. The optimized extraction conditions were adsorbent amount, 20 mg; desorption solvent and volume of desorption solvent, 2 mL acetonitrile; NaCl concentration, 0 g/L; sample pH 7. The limits of detection were in the range of 9–13 ng/L, and the limits of quantitation were in the range of 29–40 ng/L. Recoveries and matrix effect were in the range of 89.6–95.5% and 96.1–98.9%, respectively, with relative standard deviations of less than 6.2%.
研究领域:
分析化学
·
环境科学
·
食品安全
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产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 11
·1404-1411
·
IF 2.896
Wenxue Xu,Yufeng Hu,Minghuo Wu,Enming Miao,Hao Zhou,Xuwang Zhang,Jingjing Zhan
A method consisting of solid-phase isotope dansylation (derivatization with dansyl chloride) and liquid chromatography-high resolution mass spectrometry (LC-HRMS) was developed for the quantitative analysis of phenolic compounds (phenols) in environmental samples. A magnetic-HLB (hydrophilic lipophilic balanced) material was synthesized and applied as an adsorbent in magnetic solid-phase extraction (MSPE) for the enrichment of the analytical targets. Furthermore, with the solid-phase isotope labeling, the desalting and removal of labeling residuals could be simplified over conventional in-solution labeling. In addition to overcoming the matrix effect by isotope dansylation, the sensitivity for the analysis of phenols by LC-HRMS was remarkably improved by over 100-fold. The method was systematically verified, and good accuracy (86.5–104.9%) and precision (<8.6% and <11.4% for intra- and inter-day, respectively) were achieved for the tested 15 phenols. The limits of detection (LODs) of this method were estimated to be 0.2–5 ng L−1 and 5–100 ng kg−1 in estuary water and sediment samples, respectively. With this method, samples collected from the Daliao River estuary (Panjin, China) were analyzed. It was found that all of the targeted phenols were detected at concentrations ranging from unquantifiable to 485 ng L−1 (the total concentration of analytes found in each sample were in the range 822–957 ng L−1) and unquantifiable to 1368 ng kg−1 (the total concentration of analytes found in each sample were in the range 2251–2992 ng kg−1) in water and sediment, respectively.
研究领域:
环境科学
·
分析化学
·
水质
·
环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Chunjian Wu,Li Wang,He Li,Shujuan Yu
The presence of potential carcinogen 4(5)-Methylimidazole (4-MeI) in foods causes much concern, stressing the need of a sensitive determination means. Here, we proposed a high-sensitivity method to determine 4-MeI in biscuits using dansyl chloride derivatization and disperse liquid-liquid micro-extraction (DLLME) followed by a liquid chromatography-ion trap mass spectrometry (LC-IT-MS) analysis. This developed method was subsequently compared to the solid phase extraction combining with liquid chromatography-triple quadrupole mass spectrometry (SPE-LC-QqQ-MS) method. The optimized derivatization conditions were 30 °C and 10 min. Results suggested that the column retention time (RT) was significantly extended, and the MS signal response of 4-MeI-dansyl derivative was also amplified. The developed DLLME-LC-IT-MS method in 4-MeI determination provided satisfactory linearity in a range of 0.5–300 ng/mL (R 2 > 0.9991), inter-day accuracy (87-102%) and precision (%RSD ≤ 13.6%) with the quantification limit of 0.2 ng/mL, which obtained similar results comparing to the conventional SPE-LC-QqQ-MS method.
研究领域:
分析化学
·
食品科学
·
质谱分析
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产品关联
DOI
PubMed
高影响因子
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