RSC Advances
·
2014
·Vol. 4
·期 90
·49153-49160
·
IF 3.708
Dan Liu,Nan Song,Ye-Chun Cheng,Dai-Xiong Chen,Qiong Jia,Ying-Wei Yang
Poly(glycidyl methacrylate-co-ethylene dimethacrylate) modified with a new supramolecular macrocycle, carboxylatopillar[5]arene, was successfully prepared inside a capillary. The functionalized polymer monolith material was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and Fourier-transformed infrared spectra. The experimental results showed that this type of polymer possess a good network skeleton structure and excellent extraction properties for the enrichment of parabens by polymer monolith solid-phase microextraction coupled with high performance liquid chromatography. Compared with other pre-treatment methods, the simple operation and inexpensive instrumentation characteristics of the developed polymer monolith SPME method make it more suitable for the extraction of parabens in red wine samples with great potential for further broadening its applications in the enrichment of other real samples.
研究领域:
分析化学
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环境科学
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食品安全
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材料科学
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色谱学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46984
·
IF 1.901
Xiaojuan Liu,Fengjing Wu,Chaktong Au,Qi Tao,Mingyu Pi,Wenhui Zhang
Molecularly imprinted polymer (MIP) for selective extraction of p -hydroxybenzoic acid ( p -HB) was synthesized by suspension polymerization using p -HB as template, 4-vinyl pyridine as functional monomer and ethylene glycol dimethacrylate as crosslinker. As characterized by scanning electron microscopy, the MIP particles are spherical, with size ranging from 1 to 8 μm. Compared with the non-imprinted polymer (NIP), the MIP shows higher binding capacity toward p -HB: maximum binding capacity for p -HB being 8.07 μmol g −1 over MIP and 3.88 μmol g −1 over NIP. The adsorption of p -HB on MIP follows the Freundlich model and displays pseudo-second-order kinetics. The results of selective and competitive binding experiments confirm that the molecularly imprinted sites have excellent recognition ability toward p -HB. The results reveal that the MIP is a promising adsorbent for selective extraction of p -HB from water samples. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46984.
研究领域:
环境科学
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分析化学
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高分子材料
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污染物去除
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分子识别
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 22
·13319-13326
·
IF 3.269
Xiuling Xu,Fan Hu,Qi Shuai
Two novel Ba(II) complexes [Ba(TCPA)2(H2O)4] 1 and [Ba(H2O)8]·2(o-FcCOC6H4COO)·6H2O 2 [HTCPA = 2,4,6-trichlorophenoxyacetic acid and o-HOOCC6H4-COFc = o-ferrocenylcarbonyl benzoic acid] have been synthesized by a facile microwave method. The solid-state structures were well established by means of X-ray crystallography as well as routine analysis of the infrared spectrum (FTIR), elemental analysis, field emission scanning electron microscopy (FESEM) and thermogravimetric analysis (TG). Different polyhedra of tricapped triangular prisms for 1 and dodecahedra for 2 were present. It is worth noting that the central Ba(II) ion in 1 is nine-coordinated by two carboxylate oxygen atoms from TCPA ligands and seven oxygen atoms from coordinated water molecules. By contrast, the eight-coordinated Ba(II) in 2 forms barium-water clusters assembled by O–H⋯O hydrogen-bonds contributed by coordinated water molecules. The uncoordinated o-OOCC6H4-COFc ligands in 2 play a key role in the process of charge balance. FESEM images exhibited different surface appearances between the ligand and barium complexes, that is: flower-like HTCPA, branch-like o-HOOCC6H4-COFc, block-like complex 1 and corner-truncated cubes for complex 2. The allelopathic activity of the complexes and their corresponding ligands was evaluated against two herbaceous plants of barnyard grass and turnip (Raphanus sativus). All the tested compounds showed certain activity with good RI values. An antifungal bioassay was also carried out in vitro on three strains of Botrytis cinerea Pers., Glomerella cingulata Schr and Cytospora sp. Complex 1 and HTCPA can work against all three tested fungi, whereas o-HOOCC6H4-COFc and 2 only worked for Botrytis cinerea Pers. The complex presented in this paper has potential applications in weed control, and this work provides an experimental basis for future studies on Ba-based pesticides.
研究领域:
无机化学
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金属配合物化学
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农业化学
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晶体工程
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植物生理学
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农药学
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生物活性评估
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2013
·
IF 3.365
Jing Cuan,Bing Yan
In our work, we achieve the multi-component assembly of novel kinds of photofunctional hybrid materials with polyoxometalates (POMs, Na 9 EuW 10 O 36 ·32H 2 O (EuW 10 O 36 9 - denoted as EuW10)) and benzoate (4-aminobenzoate, 4-hydroxybenzoate, 4-mercaptobenzoate) modified mesoporous silica through imidazolium ionic liquid (IL, 1-methyl-3-(trimethoxysilylpropyl) compound as double functional linkage. Using Pluronic P123 surfactant as a template, benzoate functionalized SBA-15 mesoporous host is synthesized as result of the co-condensation of tetraethoxysilane (TEOS) and benzoate modified siloxane as precursor. We fabricate POM into the framework of functionalized SBA-15 mesoporous silica with IL. Here IL behaves as double linkage, which both interact with PMO with electrostatic force through ion exchange and form covalent bond to the functionalized SBA-15 mesoporous silica through its alkoxy group after cohydroxylysis and copolycondensation process. Tb 3+ is further introduced into the above hybrid system through coordination bond to carboxylate group of benzoate unit, which can be expected to modify luminescence color and to obtain close white luminescence. The physical characterizations prove these hybrid materials possess high surface area, uniform mesoporous structure, good crystallization and relatively excellent luminescence properties.
研究领域:
无机化学
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材料化学
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纳米功能材料
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光物理学
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配位化学
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溶胶-凝胶科学
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稀土发光材料
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DOI
高影响因子
Journal of Food Measurement and Characterization
·
2020
·Vol. 14
·期 5
·2549-2558
·
IF 1.648
Hu Jun,Liu Yande,He Yong,Sun Xudong,Li Bin
Food safety has been an issue of common concern in today’s society. Excessive benzoic acid (BA) additives in wheat flour would pose a huge threat to human health. In this paper, terahertz (THz) time-domain spectroscopy was used to detect BA quantitatively, which is a preservative additive in flour. Samples were prepared by grinding, drying, weighing, mixing and performing successively according to the designed concentration gradient (concentration 0.04%, 0.08%, 0.1%, 0.2%, 0.4%, 0.5%, 1%, 1.5%, …, 10%), with the BA concentration ranging from 0.040% to 19.99%. Then the THz Spectra of wheat flour samples with different concentrations of BA were collected. After preprocessing the original terahertz spectra with multiple scattering correction and other methods, Competitive Adaptive Reweighted Sampling (CARS), Genetic Algorithm (GA), Principal Component Analysis (PCA) and Uninformative Variable Elimination (UVE) were used to select effective spectral bands, and then Partial Least Squares (PLS) and Least Square Support Vector Machine (LS-SVM) models were established respectively. It turned out that the absorption peak of BA was at 1.94 THz of terahertz absorption coefficient, which increased with the rise of BA concentration. The results also indicated that better modeling results could be obtained by using CARS method for variable selection. And the established CARS-PCA-LS-SVM model had the best prediction result by combining PCA with CARS, with the correlation coefficient of the prediction (R p ) of 0.9956 and Root Mean Square Error of Prediction (RMSEP) of 0.64%. Hence, it can be concluded that terahertz technology combined with LS-SVM model can well achieve the quantitative detection of BA concentration in flour. Although the model is not universal since samples size is not large enough, the research method provides a basis for the detection of BA additives in flour.
研究领域:
食品科学
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分析化学
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光谱学
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食品安全
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计算生物学
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分子检测技术
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2025
·
IF 11.3
Yiming Sun,Chenying Zhou,Shuang Meng,Shuang Zhong,Yang Liu,Chuanshu He,Peng Zhou,Bo Lai
Heteroatom doping has been applied as an excellent method for mediating the catalytic reactivity of carbon materials. To overcome the inherent defect of slow Fe(III) reduction in Fenton chemistry, this work finds that boron-doped carbon materials demonstrate high cocatalytic activity in boosting Fenton oxidation. During Fenton chain reactions catalyzed by boron-doped reduced graphene oxide (B-rGO, the typical boron-doped carbon material), highly reactive near-free Fe(III) formed on the B-rGO surface can dramatically promote H2O2 mediated Fe(III) reduction, which strongly accelerates the rate-determining reaction in Fenton chain reactions to generate hydroxyl radicals. The results of DFT calculations, electrochemical analysis, characterizations (XAFS, in situ Raman, and HAADF-STEM), and pH-dependent performance reveal that doped boron atoms can modulate the electron-deficient iron atom of FeOH2+ by stretching the Fe–O bond (from 163.6 to 179.2 pm), which forms near-free Fe(III) on the B-rGO surface with higher oxidation capability than free Fe(III), and the Fe(III) oxidation potential is positively and linearly related to the boron content of B-rGO (R2 = 0.96). Moreover, near-free Fe(III) can dramatically oxidize H2O2 (a green electron donor) to accelerate Fe(II) regeneration, thereby promoting Fenton chain reactions for long-lasting Fenton oxidation. These discoveries afford a strategy for designing green and sustainable cocatalysts to overcome the intrinsic weaknesses of classical Fenton chemistry.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xun Xu,Xiaojie Ji,Yuankang Bao,Luliang Liao,Ping Li,Hao Zhang,Yaqiang Xie,Shuwang Duo
The efficiency of peroxymonosulfate (PMS)-based advanced oxidation processes for eliminating persistent organic pollutants is significantly limited by high residual contaminant levels and complex aqueous matrices. Developing robust and environmentally benign catalysts that can activate PMS while resisting matrix interference is therefore critical for practical wastewater treatment. Herein, we present a porous Co Mn bimetallic oxide (p-Co 1.2 Mn 1.8 O 4 ) integrating dual-metal active sites with mesoporous nanoconfinement, which simultaneously enhances PMS adsorption energy and enriches interfacial pollutant concentration. A direct electron transfer process (ETP) was enabled between the tetracycline (TC) pollutant (as an electron donor) and surface-bound PMS complexes (PMS ⁎ , as an electron acceptor) on p-Co 1.2 Mn 1.8 O 4 . This synergy enables a novelty nonradical electron-transfer pathway (ETP) between tetracycline (electron donor) and surface-bound PMS complexes (PMS ⁎ , electron acceptor), achieved nearly 100 % removal of TC within 15 min and increasing the pseudo-first-order constant from 0.121 to 0.348 min −1 over the non-porous sample. The p-Co 1.2 Mn 1.8 O 4 /PMS system also efficiently degrades binary pollutants and maintains high activity under varied pH, temperature, and complex matrices. This work provides mechanistic insights into how multi-scale structural synergy—at both atomic and nanoscale levels—in bimetallic oxide catalysts regulates PMS activation, offering a promising platform for practical water purification.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Junjing Li,Xingzhou Mu,Di Wu,Ganhua Liu,Liang Wang
The development of efficient electrochemical coupling systems for persulfate activation is crucial for expanding the treatment of pollutants such as pharmaceuticals and personal care products (PPCPs) in wastewater. In this study, we present an electrically activated persulfate-coupled N-doped graphene membrane electrode system, which achieves complete (100 %) removal of chlortetracycline hydrochloride (CTC) within 90 min. Nitrogen doping significantly enhances the catalytic activity of graphene membrane electrodes for PMS activation, improving CTC degradation by 45 %. X-ray photoelectron spectroscopy (XPS) identified pyridinic nitrogen and graphitic nitrogen as the dominant PMS-active sites. Free radical quenching experiments and electron spin resonance (ESR) spectroscopy elucidated the reaction mechanism. Under an external electric field, the N-doped graphene membrane electrode functions as an anode, triggering PMS activation and generating reactive oxygen species (ROS), including SO 4 •- , •OH and 1 O 2 . Furthermore, high-performance liquid chromatography-mass spectrometry (HPLC-MS) was employed to analyze intermediate products and assess the toxicity of CTC. The system exhibited excellent pH adaptability and broad applicability for PPCPs removal. This innovative electrochemical coupling system with N-doped graphene membrane electrodes advances the prospects of electrochemical technology in water pollution control. Environmental Implication In this study, we propose an innovative “electrochemically activated persulfate coupled N-doped graphene membrane electrode system” strategy. Using this strategy, we successfully fabricated a graphene membrane electrode material with N-active sites for persulfate activation. The N-sites in this structure enhance the charge distribution, electronic density, and spin density of the graphene material, thereby facilitating the activation of persulfate. The electrode material not only exhibits facile synthesis, excellent activity, and high stability, but also demonstrates considerable promise for applications in the field of environmental remediation.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Dongdong He,Yue Hao,Xing Hu,Yibo Liu,Mengyan Shan,Shan Zhu,Kaisheng Ming,Kezhu Jiang,Shijian Zheng
Proton exchange membrane fuel cells (PEMFCs) rely on high-performance Pt-based ORR catalysts, but traditional high-pressure hydrothermal batch synthesis suffers from low scalability and batch inconsistency. Herein, we report a high-pressure continuous-flow reactor enabling scalable synthesis of carbon-supported PtCo nanoparticles (PtCo/C) under hydrothermal conditions (270 °C, 5 MPa), achieving a production rate of 400 mg h -1 . Subsequent annealing induces the formation of an L1 2 ordered structure in PtCo/C-CPA, which exhibits enhanced metallic Pt/Co ratios and optimized electronic properties. Electrochemical measurements showed that PtCo/C-CPA achieves a mass activity (MA) of 0.547 A mg -1 at 0.9 V (vs. RHE), which is 3.38 times higher than that of commercial Pt/C for oxygen reduction reaction (ORR). After 30,000 cycles, the catalyst still retained 75.1% of its initial MA. This strategy integrates high-pressure quality and continuous-flow scalability, offering a robust pathway for industrializing high-performance ORR catalysts.
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Shun-Qiang Cui,Xin-Yi Liang,Zhi-Qiang Cai,Hou-Qun Yuan,Qiu-Yu Zhang,Yi-Fan Xia,A.K.I.M.A.N.A. Sandra,Ling-Yi Guo,Ran Wang,Shi-Yu Zhao,Yan-Xia Li,Guang-Ming Bao
Chronic exposure to oxidants such as benzoyl peroxide (BPO) and hypochlorite (ClO − ) poses significant health risks, driving the urgent need for sensitive detection methods. We developed a dual-emitting ratiometric fluorescence probe based on europium metal-organic frameworks encapsulated nitrogen-doped carbon dots ( N-CDs@Eu-MOFs ). This probe enables rapid detection within 1 min for BPO and 3 min for ClO − , demonstrating broad linear ranges (0.1–6.0 μM) with ultralow detection limits (6.80 nM for BPO, 5.78 nM for ClO − ). N-CDs@Eu-MOFs successfully quantified both analytes in five real food matrices, showing recovery rates of 91.94–108.33 % for BPO and 91.25–107.22 % for ClO − , confirming its reliability in real-world applications. Additionally, portable N-CDs@Eu-MOFs -embedded gel beads were fabricated that facilitate smartphone-based BPO quantification through RGB analysis, achieving recovery rates of 91.41–105.44 % in food samples. This instrument-free approach combines laboratory-grade accuracy with on-site practicality, significantly advancing food safety monitoring.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Min Tang,Wu Liu,Jinquan Wan,Shiyu Zuo,Zhiyong Wang,Rui Peng
Fenton-like oxidation is often hampered by high energy barriers, uncontrolled oxidation pathways, and inefficient reactive oxygen species (ROS) utilization. Here, we report an energy-driven confined catalytic nanoreactor that leverages the in-situ confinement energy generated within nanopores to fundamentally regulate degradation thermodynamics. Taking sulfamethoxazole (SMX) as a model contaminant, the confined nanoreactor exhibited a 22.11-fold higher kinetic constant (0.157 min −1 ) and 40 % enhanced mineralization efficiency compared with its non-confined system. The imprinting channel of confined nanoreactor enabled selective adsorption of SMX within the nanochannel, inducing pronounced confinement effects. The resulting confinement energy triggered a low-entropy degradation pathway (ΔS reduced by 3.2 × 10 3 -fold), which broke thermal equilibrium constraints and redirected SMX oxidation along a low-energy-barrier route. The in-situ confinement-induced low-entropy reaction not only accelerated pollutant degradation but also improved ROS conversion efficiency. This study demonstrated a green and sustainable approach to overcome the intrinsic efficiency bottleneck of Fenton-like processes and provide a new perspective on exploiting nanoconfinement effects for environmental remediation.
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产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Liu Xiangyun,Chai Youzheng,Gu Yuwei,Li Yongqi,Wang Xiao,Wang Qiancheng,Zhang Gong,Liu Huijuan,Qu Jiuhui
High-salinity mine water generated during membrane concentration of mine water contains structurally stable complex organic matter that resists removal and mineralization by conventional advanced oxidation processes, ultimately producing low-value by-product salts that hinder the resource utilization pathway. Leveraging the ultraviolet sensitivity of inherent chromophore groups and conjugated structures, this study developed an ultraviolet-activated assisted electrochemical process. By harnessing ultraviolet/oxidant synergies, this approach achieves ~89.9% total organic carbon removal, with minimal performance decay over 1000 hours. Combined with ultraviolet-visible spectroscopy, fluorescence excitation-emission-matrix spectroscopy, fourier transform ion cyclotron resonance mass spectrometer, and model contaminant experiments, this study elucidates an ultraviolet activation and radical attack synergistic mechanism driving organic mineralization. The direct integration of purified brine with bipolar membrane electrodialysis successfully produces acid, high-purity alkali (>99%), and reusable water, thereby closing the loop of impurities removal and resource recovery. This integrated system offers a strong strategy for high-value resource recovery and sustainable mine water management.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）