JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Siyu Chen,Zhanwei Xu,Mengfan Li,Weiwei Guan,Wenyang Li,Ziwei Zhang,Yang Yang,Jiayin Li,Kai Yao
CoPcF 4 nanorods fixed on activated carbon substrates (CoPcF 4 /AC) were created using an in situ solid approach for catalysts to improve the response of thionyl chloride (SOCl 2 ). Density functional theory calculations showed that the benzene rings around the CoPcF 4 molecule exhibited a positive electrostatic potential, providing multiple active sites for the SOCl 2 reduction reaction. Moreover, the combination investigations from SEM and focused ion beam-SEM indicated that a loose and porous LiCl film appeared on the surface of the carbon cathode containing CoPcF 4 /AC, facilitating the permeation of newly formed LiCl. The inside morphology of the carbon cathodes discharged displayed a substantial number of nanopores around 50 nm, which could be attributed to the CoPcF 4 /AC nanocomposites inducing the nucleation of nanosized LiCl on the surface and inside to keep the cathode with a porous structure, benefitting from the SOCl 2 reduction reaction. The Li/SOCl 2 battery catalyzed by the CoPcF 4 /AC exhibited a stable voltage platform around 2.8 V, lasted 98.2 % during the entire discharge process, and had a relative energy improvement of 181.03 % and 147.89 % compared with those containing CoPc and CoPcF 4 , respectively.
研究领域:
材料科学
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电化学
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理论计算
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 61
·36971-36979
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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
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生物医学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2012
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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
SYNTHESIS-STUTTGART
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2013
·Vol. 45
·期 16
·2234-2240
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IF 2.5
Wenbin Lu,Zhuye Liang,Yuwei Zhang,Fan Wu,Qun Qian,Hegui Gong
Alkyl aryl ketones were prepared on a gram scale by the nickel-catalyzed reductive coupling of alkyl iodides with aroyl chlorides. When scaled up 30-fold, this reaction shows a comparable coupling efficiency to the previously reported reaction performed under small-scale conditions. The mild and convenient reaction conditions show excellent tolerance to a range of functional groups and provide the ketones in good to excellent yields.
研究领域:
有机化学
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合成化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2020
·
IF 4.3
John Michael Tesha,Derrick S. Dlamini,Saood Qaseem,Zhenyu Cui,Jianxin Li
Polysulfone–Styrene Maleic Anhydride (PSF/SMA) ultrafiltration (UF) membranes were prepared by the thermally induced phase separation (TIPS) method. The morphology of the UF membranes was fine tuned by varying the concentration of SMA. The surface of the membranes was then modified by dip-coating with β-cyclodextrin (β–CD) and Trimesoyl Chloride (TMC) to form tight UF membranes. The effects of β–CD on the separation performance, structure, and morphology of the flat sheet PSF/SMA membrane were examined. The tight UF membranes were characterized and then tested for the removal of Bovine Serum Albumin (BSA) and Congo red from water. The thickness was varied by increasing the concentration of β-CD. When increasing the concentration of β-CD from 2.0 % w/v to 8.0 % w/v, the thickness of the top layer increased from 8 μm to 18 μm, respectively. Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and X-Ray Photoelectron Spectroscopy (XPS) were used to confirm the successful deposition of the TMC and β-CD at the surface of the membrane. It was also established through Atomic Force Microscopy (AFM) that the roughness of membranes increases with an increase in β-CD concentration. The contact angle of the tight UF PSF/SMA blend membranes declined from 79.8° to 55.9° at the addition of β-CD implying that the hydrophilicity of the membranes improved. The lowest pure water flux of 40 Lm −2 h -1 was achieved by the membrane coated with 8.0 % w/v of β-CD. However, the highest pure water flux of 127 Lm −2 hr −1 was observed on the uncoated PSF/SMA UF membrane at 3 % wt/wt SMA. The highest BSA rejection (94 %) was recorded from PSF/SMA with a coating layer containing 8 % wt/v of β-CD concentration. Furthermore, the maximum Congo red dye rejection (96 %) was achieved by the tight UF membrane when β-CD concentration was 8 wt/v and the SMA was 3 % wt/wt.
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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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Yibin Zhang,Xianyu Qiu,Boling Wang,Xiaoling Liu,Yueting Cheng,Xiaoqian Rong,Yanhong Kuang,Lin Sun,Jun Liu,Rudy L. Luck,Haiying Liu
A fluorescent probe was developed for the detection of phosgene based on 1,8-naphthalimide, of which o-diaminobenzene was used as the recognition moiety. The probe does not fluoresce due to nonradiative decay. The probe reacts rapidly with phosgene via an intramolecular cyclization reaction, which induces large fluorescence due to increased rigidity in the resulting molecule and a low detection limit (0.23 nM). This probe has excellent selectivity for phosgene against competing interference analytes and, in the form of probe-loaded test paper, is an extremely sensitive method for phosgene sensing in the gas phase below 1 ppm concentrations.
研究领域:
化学
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分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 18
·e202304772
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IF 1.9
Chenghao Tang,Chaoyang Song
Graphical Copper encapsulated N-rich carbon material derived from porous organic polymer was found to be highly active heterogeneous catalyst for solvent-free coupling of acyl chlorides with alkynes. Copper promoted Sonogashira coupling has recently emerged as an attractive route for synthesizing α, β-Acetylenic ketones (ynones). In this study, a porous organic polymer based on [2,6-Bis(1,2,3-triazol-4-yl)pyridine] (BTP) was prepared through oxidative coupling. By incorporating copper salt and subsequent pyrolysis, copper encapsulated N-doped carbon materials were obtained. The resulting copper/carbon materials exhibited excellent catalytic performance for the coupling of acyl chlorides and alkynes due to their large surface area, abundant mesopores, and uniformly distributed metal nanoparticles. The reaction proceeded efficiently, yielding ynones with good to excellent yields at room temperature within a short reaction time (4 h) using only 0.4 mol % catalyst. Compared to previously reported copper nanocatalysts, the N-doped carbon materials supported copper catalyst demonstrated higher catalytic activity and operated at lower reaction temperatures. Additionally, the catalyst displayed reliable recyclability without any significant loss in catalytic activity.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Mengfan Wang,Shao-Lu Li,Youcai Chen,Qiyu Duan,Dandan Cheng,Genghao Gong,Yunxia Hu
The integration of high permeability and exceptional selectivity, thereby overcoming the conventional “trade-off” effect, remains a persistent challenge for the practical implementation of organic solvent nanofiltration (OSN) membranes. Herein, at the molecular level of design, we utilized the 5,5′-diamino-2,2′-biphenol (amino-BIPOL) and diacyl chloride as IP monomers to prepare OSN membranes with high perm-selectivity. The amino-BIPOL, a contorted biphenol molecule with four reactive sites, serves as a molecular-level unit to hinder efficient packing of polymer chains and induce the formation of interconnected micropores in the resulting polyesteramide layers. By employing diacyl chloride terephthaloyl dichloride (TPC) and isophthaloyl dichloride (IPC) as the oil-phase cross-linker, two kinds of TFC membranes were prepared. The resulting membranes both present smooth surface morphology, with ultrathin and high microporous selective layer allowing for efficient mass transfer. Specifically, the methanol permeance of amino-BIPOL/TPC and amino-BIPOL/IPC membrane reaches up to 15.1 and 15.6 LMH/bar, while maintaining a molecular weight cut-off (MWCO) value of 300 and 373 Da, respectively. Overall, this work illustrates the different oil-phase cross-linkers will result in diverse nanofilm microstructure and thus with distinct perm-selectivity properties, offering new insights for the design and modification of advanced OSN membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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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
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环境科学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Peijian Wang,Jisong Zhang,Kai Wang,Guangsheng Luo,Pei Xie
NH3 was used as acid absorbent to intensify the reactions between aniline and benzoyl chloride in a microstructured chemical system in this work. By suppressing the side reaction, the addition of NH3 could reduce the reaction time needed for 99% reactants conversation to less than 1/10 of the condition without NH3. Furthermore, a complete kinetic model containing two rapid main reactions and two reversible consecutive side reactions was established, and six reaction rate constants and their corresponding activation energies and pre-exponential factors as well as confidence intervals were determined precisely. The accuracy of the obtained parameters was verified by comparing the calculated data with experimental data at extensional temperature. The kinetic model was used to optimize the intensification operating conditions, and effects of reactants concentration, temperature, NH3 addition amount, and NH3 feed methods were discussed based on the simulation results. This work proves that the microstructured chemical system not only provides an effective intensification ability but also develops a reliable platform for kinetic studies.
研究领域:
化学工程
·
反应动力学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Zhao Zhang,Guodong Kang,Haijun Yu,Yan Jin,Yiming Cao
In this study, a novel acyl chloride monomer trimellitic anhydride chloride (TAC) with an anhydride group was blended with trimesoyl chloride (TMC) as organic phase monomers to fabricate high-flux nanofiltration membranes. Due to the reaction activity differences of organic phase monomers (TMC and TAC) with piperazine, the chemical compositions and structures of polyamide active layer could be tailored through varying the TAC content. It was found that the participation of TAC could yield a looser polyamide separation layer on the polysulfone support membrane, along with an increased surface roughness , hydrophilicity, pore size and negative charge density. As a result, the resultant membrane exhibited excellent water-salt separation. When the TAC concentration was increased to 0.04 wt%, the optimized membrane exhibited a high pure water permeability (PWP) of 13.2 L m −2 h −1 bar −1 , up to 2-fold, in comparison with the pristine membrane, whereas the salt rejections of Na 2 SO 4 , MgSO 4 and NaCl were 97.6%, 92.7%, and 34.0%, respectively. This work provided a novel and facile strategy to develop high-flux NF membrane.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 10
·6667-6677
·
IF 5.7
Zhang Yao,Hao Longyun
In this paper, a modified sericin containing active acryloyl groups (MSAA) was prepared by amidation reaction using acryloyl chloride and sericin as raw materials, and its structure was analyzed by FT-IR, fluorescence spectrum, zeta potential and 1 H NMR. The results showed that the active acrylyl groups were successfully introduced into the molecular chains of sericin. Then, MSAA and an alkaline crosslinking agent 1,3,5-triacroylaminohexahydro-s-triazine (FAP) were combined to finish cotton fabric in alkaline condition. Under alkaline condition, the anti-wrinkle effect of cotton fabric could be improved by finishing with MSAA and FAP. By measuring the wrinkle recovery angle, it was found that with the increase of MSAA content, the anti-wrinkle effect of cotton fabric was obviousy improved, without significant impact on the strength and whiteness of the fabric. In addition, the dyeing property and ultraviolet resistance of the finished fabric could be apparently improved.
研究领域:
纺织科学
·
材料化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）