NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 39
·17023-17029
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IF 2.5
Shiling Yang,Xuesong Gao,Yang Yu,Zheng Zeng,Jiashang Chen,Wensong Du,Ruiyue Liu,Siqi Li,Bowen Chen,Chonggang Wu
Sulphonated poly(ether ether ketone) (SPEEK) exhibits excellent mechanical properties as a proton exchange membrane. However, its proton conductivity remains insufficient for practical applications. To address this limitation, a covalent incorporation of proton-conductive functional groups into the SPEEK matrix is proposed to establish continuous proton transport channels. Herein, through an iodination reaction of N-iodosuccinimide with SPEEK, we have successfully synthesised iodinated sulphonated poly(ether ether ketone) (I-SPEEK) with an iodination efficiency of 71.0% as confirmed by ion chromatography. This work proposes tentative reactivity positions and mechanistic hypotheses for the sulphonation of poly(ether ether ketone) and the subsequent iodination of SPEEK. Effective introduction of iodine is confirmed by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. Meanwhile, I-SPEEK serves as a precursor that provides grafting sites for hydrophilic groups (e.g. vinyl-silanes via the Heck reaction), offering a novel strategy for subsequent studies to introduce proton-conductive moieties.
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 131
·期 7
·
IF 1.395
Bojian Hu,Xiaoqin Chen,Yan Zuo,Zuliang Liu,Xiaodong Xing
Bi-functional antibacterial material was prepared by co-grafting N -halamine and quaternary ammonium salt monomers from cellulose fiber. The grafted fiber was characterized by Fourier transform infrared spectra, and X-ray photoelectron spectra. The N -halamine derived from the precursor 4-[(acryloxy)methyl]-4-ethyl-2-oxazolidinone via chlorination treatment and the oxidative chlorine (Cl + ) leaching behavior were investigated. The antibacterial activities of singly (only QAs-functionalized or only Cl + -releasing) and dual (QAs-functionalized and Cl + -releasing) functional cellulose fibers were tested against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus . Compared to singly functionalized formulations, the bi-functional cellulose fiber exhibited excellent and rapid bactericidal performance against both E. coli and S. aureus . © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40070.
研究领域:
高分子科学
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材料科学
·
微生物学
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化学工程
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生物技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 15
·9173-9182
·
IF 10.733
Ke Wang,Peter T. Clough,Pengfei Zhao,Edward J. Anthony
Calcium looping, a promising high-temperature CO2 capture technique, offers a mid-term economic solution to mitigate anthropogenic CO2 emissions. The main challenge in calcium looping is the synthesis of highly efficient CaO-based sorbents that can be used over many reaction cycles. Here, a sacrificial N-doped carbon nanosheet template was developed which produces MgO-stabilized CaO sorbents with fast adsorption rates, high capacities and remarkable long-term performance over many cycles. The characterization results show that such a template was formed through in situ pyrolysis of an organic acid and nitrates in a simple heating process in nitrogen. The presence of a carbonaceous template prevented crystallite growth, featured highly macroporous nanosheet (∼60 nm thick) morphologies, and ensured homogeneous mixing of Ca and Mg, which are essential to minimize diffusion limitations, mitigate sintering, and provide structural stability. Thus, 10 mol% MgO acting as an inert stabilizer was sufficient to achieve a CO2 uptake of 0.65 g g−1 (corresponding to a capacity retention of 89.9%) after 10 cycles under realistic conditions, as confirmed by TGA analysis. This N-doped carbon template can be applied generally to produce a wide range of porous and nanostructured stabilized CaO sorbents with stable CO2 uptake.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Kaixiang Ji,Fangshuo Liu,Tesfaye Hailemariam Barkae,Shuai Quan,Abdallah M. Zeid,Wei Zhang,Jianping Li,Guobao Xu
N -hydroxyphthalimide (NHPI) is an efficient organic catalyst and an important chemical raw material which can be used as an intermediate in organic synthesis of drugs and pesticides. In this study, NHPI has been used as a coreactant of lucigenin chemiluminescence (CL) for the first time. The CL of the developed system is significantly enhanced in the presence of Co 2+ . Therefore, we developed a novel lucigenin-NHPI CL method coupled with flow injection analysis for the sensitive, precise, and selective determination of Co 2+ . The linear range of this method is 1–1000 nM, and the detection limit is 67 pM (S/N = 3). In addition, this method has a good selectivity for Co 2+ . It has been applied to the detection of Co 2+ in lake water, and the standard recovery rate is 95.9–103.2%, indicating that the method is feasible.
研究领域:
分析化学
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环境科学
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化工
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DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2014
·
IF 3.679
Sheng-Jie Chen,Yong-Qi Li,Yong-Yong Wang,Xiao-Li Zhao,Ye Liu
The ionic hybrid P,N-ligands of 1 and 2 have been synthesized as one type of unconventional tertiary phosphines with the advantages of both the π-accepting ligands and the hemilabile ligands. The corresponding ionic Rh(I)-complexes of 1A and 2A proved to be more efficient catalysts for hydroformylation of 1-octene over isomerization than the traditional Rh I (acac)(CO)(PPh 3 ), due to the π-backdonation interaction in Rh → P linkage and the hemilabile ligation of N,P-coordinating sites to Rh-center. The in situ high-pressure FT-IR analysis indicated that: (1) the formation and lifetime of the active Rh H species (2047 cm −1 ) derived from 1A are facilitated by the presence of ligand 1 ; (2) the formation of the active Rh H species is depressed without the aid of the P,N-hemilabile ligation; and (3) the active Rh H species derived from Rh I (acac)(CO)(PPh 3 ) is unstable and susceptible to the formation of the inactive carbonyl-bridged Rh-dimer.
研究领域:
化学
·
催化反应
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 27
·期 2
·169-177
·
IF 1.757
Jie Liu,Ru Cheng,Jianping Deng,Youping Wu
Chiral, pH-responsive hydrogels are constructed by poly(ethylene glycol) diacrylate/ α -cyclodextrin (PEGDA/ α -CD) inclusion complex and L- N -acryloyl-alanine or D- N -acryloyl-alanine (L-NAA or D-NAA) by an effective free radical polymerization approach. PEGDA containing two C=C end groups was used simultaneously to introduce α -CD units in the resulting hydrogels and to serve as a cross-linking agent, by which forming the designed hydrogels in quantitative yield. Hydrophilic α -CD moieties acted as pore-forming agent, while the L(D)-NAA-based polymer chains bearing –COOH groups enabled the hydrogels to display remarkable swelling–deswelling behavior in response to pH variation. The chiral NAA monomer-derived polymer chains rendered the hydrogels with intriguing optical activity, according to circular dichroism spectra. Scanning electron microscopy revealed the uniformly porous microstructures of hydrogels. More remarkably, the L-NAA-based hydrogels preferentially adsorbed trans -4-hydroxy- d -proline and preferentially released trans -4-hydroxy- l -proline, while D-NAA-based hydrogels provided opposite results. The hydrogels also demonstrated remarkable enantioselective release ability towards chiral drug ibuprofen. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 14
·8155-8167
·
IF 4.21
Guo Jianwei,Liu Xiao,Han Miaomiao,Liu Yadong,Ji Shengxiang
Abstract An amphoteric metal adsorbent, poly( N -acryloyl- l -histidine)-modified sawdust (SD- g -P(A-His)), is prepared by reversible addition–fragmentation chain transfer (RAFT) polymerization of N -acryloyl- l -histidine from modified sawdust. SD- g -P(A-His) possess imidazolyl and carboxyl groups and shows outstanding adsorption performance for heavy metals. The adsorption capacities of SD- g -P(A-His) are 241.8 and 95.7 mg/g for Pb(II) and Cu(II), respectively. Ten tested metal ions, e.g. Au(III), Cr(III), Cu(II), Fe(III), Ni(II), Pb(II), Pd(II), Hg(II), Mg(II) and Zn(II), can be effectively removed from the multi-metal solution at pH > 2.7, while Au(III) and Pd(II) can be selectively recycled from the multi-metal solution by lowering the pH to ≤ 1.0. The adsorption kinetics of Pb(II) and Cu(II) onto SD- g -P(A-His) fit well with the pseudo-second order model. SD- g -P(A-His) can treat the water with low concentration of metal ions down to sub-10 μg/L level to meet the Quality Standards for Drinking Water of China. Moreover, SD- g -P(A-His) can be recycled and maintain high adsorption efficiency (91.5%) even after 5 cycles. Graphic abstract
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Water
·
2022
·Vol. 14
·期 15
·2371
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IF 3.53
Huili Tang,Ziru Li,Hanqing Chen,Yang Xu,Xu Jiang,Erdeng Du,Zhen Lyu,Lu Zheng,Mingguo Peng
N-nitrosamines have recently attracted attention as a class of disinfection byproducts and are also a hot spot in environmental studies. Current N-nitrosamine analytical methods typically involve manual solid phase extraction (SPE) of samples followed by quantitative analysis using liquid chromatography-mass spectrometry (LCMS), which is time-consuming and may also fail to eliminate complex matrix effects. Size exclusion chromatography (SEC) is a technique that can separate compounds according to their molecular size. For the first time, this study developed an Online-SPE/SEC/LCMS quantitative analysis method to detect and analyze nine common N-nitrosamine disinfection byproducts in wastewater plant tailwater, including N-dimethylnitrosamine (NDMA) and N-nitrosodiethylamine (NDEA), etc. The samples of 1.0 mL can be directly injected after the simple 0.22 μm membrane filtration. This method reports the combination of SPE, SEC, and RP C18 columns to achieve several functions in a processing time of 20 min, including online enrichment, desalination, and matrix separation for the first time. The method provides good linearity (R2> 0.999), recoveries ranging from 91.67% to 105.88%, relative standard deviation (RSD) lower than 4.17%, and the limits of detection (LOD) are 0.12–6.60 ng/L. This method alleviates tedious human labor and can effectively overcome the matrix effect (ME< 20%). This method allows for the accurate quantitative analysis of N-nitrosamines with high compatibility in wastewater plant tailwater, rivers, and lakes with a high background matrix. Interested researchers can also use this method as a reference in the online analysis of other specific pollutants after necessary optimization. It can also be utilized for non-targeted screening and targeted analysis of contaminants in water with a wide range of applications, giving valuable information for environmental monitoring.Keywords:N-nitrosamines;analysis method;online solid-phase extraction (Online-SPE);size exclusion chromatography (SEC);LCMS;column switching;wastewater plant tailwater
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
ACS Applied Polymer Materials
·
2020
·
IF 0
Cheng Wang,Guanghua He,Jilong Cao,Lihong Fan,Weiquan Cai,Yihua Yin
Materials for oil–water separation under harsh conditions that exhibit high separation efficiency, salt tolerance, and the capability of high-speed separation and reusability are in great demand. In this study, we introduce a series of sodium alginate (SA)/N-succinyl chitosan (NSCS) composite aerogels with outstanding mechanical strength, robust salt tolerance, and high oil–water separation efficiency. These aerogels were well designed and prepared through a combination of a freeze-drying method, ionic cross-linking, and chemical cross-linking. Due to their remarkable mechanical performance and good flexibility, the composite aerogels could achieve oil–water separation under various harsh conditions. The separation efficiency reached 99% owing to the outstanding underwater superoleophobicity and high-porosity structure of the aerogel. More importantly, the aerogels could preserve their high separation efficiency and underwater superoleophobicity after being soaked in a saturated NaCl solution for 30 days or after 30 separation cycles, which suggested their favorable stability under high-salinity conditions. These results indicated that SA/NSCS aerogels were qualified materials for oil–water separation, which gives us hope for their application in oil–water separation under harsh conditions.
研究领域:
材料科学
·
环境科学
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DOI
RSC Advances
·
2021
·Vol. 11
·期 53
·33373-33379
·
IF 3.361
Lejie Zhu,Jianmin Luo,Guohui Dong,Yun Lu,Yinlong Lai,Jun Liu,Guanmei Chen,Yi Zhang
As a kind of metal-free organic semiconductor photocatalyst, g-C3N4 has been widely explored for use in photocatalysis. However, the low quantum yield, small absorption range, and poor conductivity limit its large-scale application. Introducing another kind of semiconductor, particularly an oxide semiconductor, can result in some unexpected properties, such as an improved change transfer, enhanced light absorption, and better conductivity. In this work, CuO/g-C3N4 is successfully prepared through an impregnation and post-calcination method. A series of measurements support the formation of an organic-inorganic hybrid p–n heterojunction at the CuO (p-type) and g-C3N4 (n-type) interface. Furthermore, the photoactivity of the composite is evaluated via photocatalytic NO removal and the visible degradation of rhodamine B (RhB). Results show that the photocatalytic properties of CuO/g-C3N4 are almost twice as high as those of g-C3N4. In comparative tests, the photocatalytic degradation performance of Mix-CuO/g-C3N4 (the mixture of CuO and g-C3N4 nanosheets prepared by mechanically mixing) is even lower than that of pure g-C3N4. The degradation of RhB is only 19.7% under visible light after 30 min of irradiation. The improvement in the photoactivity of CuO/g-C3N4 results from the built-in electric field close to the formed p–n heterojunction, which switches the electron transfer mechanism from a double-charge transfer mechanism to a Z-scheme mechanism. In addition, the formed p–n heterojunction favors charge transfer, and thus the photocatalytic performance is significantly improved.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
·
半导体物理
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DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 7
·4234-4239
·
IF 4.036
Dandan Li,Chengyang Wang,Xiaoying Yan,Shengqi Ma,Ran Lu,Chunhai Chen,Guangtao Qian,Hongwei Zhou
To obtain high thermostable materials for flexible display substrates, a series of copoly(benzimidazole imide)s was prepared using 5-amine-2-(4-aminobenzene)-1-phenyl-benzimidazole (N-PhPABZ) and 6(5)-amino-2-(4-aminobenzene)-benzimidazole (PABZ). Incorporating N-phenyl groups effectively healed the brittleness of the poly(benzimidazole imide)s (PBIIs) derived from pyromellitic dianhydride (PMDA), and the resultant homo- and copoly(benzimidazole imide)s displayed an outstandingly high glass transition temperature (Tg > 450 °C) and a low coefficient of thermal expansion (CTE < 10 ppm K−1). Furthermore, the influence of removing intermolecular hydrogen bonds on the properties of these poly(benzimidazole imide)s was systematically analyzed. These data provide a feasible method to prepare superheat-resistant poly(benzimidazole imide)s without H-bonding.
研究领域:
材料科学
·
高分子化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chen Wang,Yuepeng Liu,Zhongfang Li,Likai Wang,Xueliang Niu,Peng Sun
The 2D Fe, N-codoped graphene (2D Fe-NG) with high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performances for Zn-air batteries (ZABs) is prepared by a facile synthesis method, which used nitrogen-containing polymer (2,5-benzimidazole) (ABPBI), Fe salts and the cationic surface-active agent treated montmorillonite (CMMT) layer template. The vacuum assist and heat treatment of ABPBI/CMMT at 350 °C are the keys of Fe 3+ addition. The characterization analysis demonstrates that added Fe 3+ exists in the form of Fe-N x bonds formed by coordination with N species of ABPBI in MMT. Owing to the existed Fe-N x sites in 2D Fe-NG, it possesses excellent ORR performance better than 2D NG and 20 wt% Pt/C in O 2 -saturated 0.1 M KOH electrolyte. For OER, the performance of 2D Fe-NG is close to that of RuO 2 . The self-made ZAB based on 2D Fe-NG exhibits high peak power density, excellent rechargeable performance, and higher D-C cycling stability.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）