International Journal of Electrochemical Science
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2023
·Vol. 13
·期 12
·11953-11960
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IF 1.5
Benzhi Liu,Jinlong Yan,Min Wang,Xiangyang Wu
Molecularly imprinted polymers were prepared on the surface of acrylamide-functionalized multi-walled carbon nanotubes by thermal polymerization, which using nonylphenol as template molecule, methacrylic acid as functional monomer and ethyleneglycol dimethacrylate as crosslinking agent. The molecularly imprinted polymers were modified on the surface of glassy carbon electrode to prepare electrochemical sensor. The proposed sensor showed a linear range of 0.1 to 30 μM with a detection limit of 0.02 μM. The sensor exhibited good stability, selectivity and high sensitivity to nonylphenol detection. It was successfully applied to detect nonylphenol in water samples.
研究领域:
分析化学
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环境监测
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材料科学
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电化学
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传感器技术
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JOURNAL OF THE ENERGY INSTITUTE
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2026
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IF 6.5
Siwei Yan,Kezhen Qian,Dezhen Chen
The catalytic conversion of plastic waste is often complicated by additives. This study systematically investigates the influence of nonylphenol, a common oxygenated additive, on the catalytic performance of HY (FAU-type) and HZSM-5 (MFI-type) zeolites using high-density polyethylene (HDPE) and n -octane. The research revealed that nonylphenol exhibits a dual role: it provides an initial activity enhancement via bimolecular hydride transfer but more significantly acts as a potent coke precursor, driving rapid deactivation through pore-mouth blockage. Although nonylphenol accelerated deactivation, it did not alter the fundamental cracking pathway of n -octane on either zeolite. There are significant differences in deactivation behavior and selectivity trends between HDPE raw materials and n -octane model compounds. This discrepancy reveals the limitations of using n -octane as models to predict catalyst behavior in polyethylene catalytic cracking.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2026
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IF 4.5
Liyan Wang,Limin Ding
This work aimed to prepare organo-montmorillonite (PB-MMT and PD-MMT, namely O-MMT) adsorbent with hydrophobic properties and hydrogen bond acceptor capacity via modification with Gemini surfactants (PB and PD), and to investigate the key role of long alkyl chains and amide bonds in the adsorption behaviors of 4-nitrophenol (4-NP) and 4-chlorophenol (4-CP) in aqueous solutions. The microstructure, morphology and surface propertie of O-MMT were explored by different techniques, including XRD, BET, SEM, FT-IR, TGA and Zeta potential. The results show that the saturated adding amount of PB and PD is 1.0 CEC, and PD with flexible alkyl spacer shows markedly higher loading amount (38.22 wt%) on Na-MTT than PB with rigid spacer (36.35 wt%). The batch experiment results of O-MMT to 4-NP and 4-CP demonstrate that the two are ranked by adsorption capacity as follow: PD-MMT > PB-MMT. Kinetic studies are found pseudo-second-order (R 2 > 0.99) and equilibrium data are fitted well by Freundlich isotherm model (R 2 > 0.99) which indicate the adsorption process is primarily multilayer adsorption. The calculated thermodynamic parameters exhibit that the adsorption processes of 4-NP and 4-CP on O-MMT are physical adsorption and exothermic. Adsorption mechanisms highlighted the synergistic effects of hydrophobic interactions and O-H···N hydrogen bonding as important design criteria for efficient removal of 4-NP and 4-CP from aqueous solutions.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2026
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IF 6.1
Shaoying Gong,Tianju Yang,Ruoyu Wu,Qinghai Sheng,Tangwei Zhang,Ming Xiao,Miao Wang,Yongxin She,Jing Wang,A.M. Abd El-Aty
Nonylphenol (NP) is known to damage the intestinal epithelial barrier (IEB), although its mechanisms remain unclear. Arabinogalactan (AG) is a natural polysaccharide with intestinal protective properties. This study explored the mechanisms of NP-induced IEB damage and evaluated the protective potential of AG in a Caco-2 cell monolayer model. The results revealed that NP induces inflammation and oxidative stress through the PI3K/AKT/mTOR signaling pathway, thereby inhibiting tight junction (TJ) gene and protein expression and ultimately leading to IEB damage. Conversely, AG enhanced TJ expression and suppressed inflammation and oxidative stress by activating the PI3K/AKT/mTOR signaling pathway, thus alleviating NP-induced IEB damage. This research provides new insights into the molecular mechanisms of NP-induced IEB damage and highlights the potential of AG as a functional food ingredient for promoting intestinal health. Moreover, our study provides a theoretical basis for supporting policies aimed at restricting NP residues in food and offers a potential dietary reference for high-risk populations exposed to NP-contaminated environments.
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JOURNAL OF CHROMATOGRAPHY A
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2026
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IF 4
Xue Yang,Yuanyuan Zhang,Pinzhu Chen,Shengxiao Zhang,Qiang Xu,Yujing Chen,Faju Hou
In this paper, poly(N-isopropylacrylamide) (PNIPAM) composite materials were successfully prepared through free radical polymerization. Utilizing its thermosensitive properties, PNIPAM can control the adsorption and desorption processes by adjusting the temperature. Due to the presence of hydrophobic interactions and hydrogen bonds, this polymer exhibits excellent adsorption performance for bisphenol A and bisphenol B. The adsorption process follows the pseudo-second-order kinetic model and the Freundlich isotherm model, indicating that its adsorption behavior is non-uniform. Under optimized conditions, the maximum adsorption capacities for BPA and BPB are 187.13 mg·g⁻¹ and 271.45 mg·g⁻¹, respectively. In addition, a magnetic solid-phase extraction method was established for extracting four phenolic compounds from water samples. Under the optimal conditions, the limits of detection are in the range of 0.0005 - 0.02 mg·L⁻¹, and the limits of quantification are in the range of 0.00165 - 0.066 mg·L⁻¹, respectively. The applicability of this method was evaluated by analyzing three water samples, and the spiked recovery rates are in the range of 75.81 - 97.54 %. The results show that the magnetic and thermal dual-responsive properties of the synthesized polymer contribute to efficient separation and recovery.
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MARINE ENVIRONMENTAL RESEARCH
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2025
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IF 3.2
Peipei Liu,Qichao Fan,Jingjing Miao,Lu Wang,Shanshan Jiang,Luqing Pan
The contamination of marine sediments by endocrine-disruptive contaminants (EDCs) represents a global threat to marine ecosystems. Among these pollutants, 4-nonylphenol (4-NP) and 17β-estradiol (E2) are particularly noted for their potent endocrine-disrupting effects in aquatic organisms. This study employed juvenile Manila clams ( Ruditapes philippinarum ), with genetically determined sexes, as model organisms in a 14-day exposure experiment. The clams were exposed to 4-NP and E2 at concentrations of 0 (control), 0.1, 1, and 10 μg/L. We primarily investigated the effects on steroidogenesis and vitellogenin ( VTG ) expression, which are key factors in assessing endocrine disruption. Results showed that 4-NP inhibited shell growth at all tested concentrations, and increased free E2 in tissues levels were observed in clams exposed to 0.1 μg/L of 4-NP on both the 7th and 14th days. Conversely, E2 did not significantly affect free E2 in tissues levels. Notably, exposure to 1 μg/L 4-NP significantly upregulated mRNA expression of genes involved in the steroidogenesis pathway ( GnRH , CYP17 , and 17β-HSD ) in genetically female juveniles. Both male and female juveniles showed increased VTG mRNA expression after 4-NP exposure. These findings confirm the endocrine-disrupting potential of 4-NP, particularly affecting genetically female juveniles. The alterations in key genes involved in steroidogenesis and the upregulation of VTG expression highlight the vulnerability of bivalves to EDCs. This study underscores the importance of VTG expression as a reliable biomarker for assessing the estrogenic impacts and action mechanisms of EDCs in juvenile bivalves.
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MOLECULES
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2025
·Vol. 30
·期 1
·166
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IF 4.6
Yanping Duan,Xia Zhao,Xiang Nan,Zhifeng Sun,Xiaoyun Lei,Wei Wang,Hong Hao,Jianfang Li
Anisotropic particles have a wide range of applications in materials science such as emulsion stabilization, oil–water separation, and catalysis due to their asymmetric structure and properties. Nevertheless, designing and synthesizing large quantities of anisotropic particles with controlled morphologies continue to present considerable challenges. In this study, we successfully synthesized anisotropic microspheres using a soap-free seed emulsion polymerization method. This approach combines the benefits of seed emulsion polymerization with emulsion interfacial polymerization. By varying the concentrations of dissolved polymeric monomers, 3-methacryloyloxypropyltrimethoxysilane (MPS), and the initiator of potassium persulfate (KPS), different shapes of bowl, cap, and three-sided concave particles were obtained in surfactant-free aqueous solutions, simplifying the post-treatment process. The cap particles are Janus particles with good emulsion stability to toluene/water emulsions over 30 days. The catalytic degradation of 4-nitrophenol (4-NP) was investigated after loading silver nanoparticles on the surface of the particles by in situ deposition. The anisotropic particles obtained in this work have potential applications in emulsion stabilization and catalysis.
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LANGMUIR
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2024
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IF 3.7
Jingyun Ye,Ming Jin,Decheng Wan
We here show that the typical poison of thiols, if below a certain level, promotes rather than suppresses the catalytic activity of gold nanoclusters (AuNCs). A few thiol groups functionalized hyperbranched polyethylenimine (PEI, Mn = 2000 Da) patched on a mesoporous polymeric bead aid the direct synthesis of AuNCs. The nucleation efficiency of AuNC is 93-fold favored at a level of 2 thiols per PEI (0.04 equiv of the amino units) than that by neat PEI, and AuNCs (1.3 nm) are obtained up to a gold load of 6.3% on the support. Unexpectedly, the catalytic activity of AuNCs is favored by the thiol up to 2 thiols per PEI, as evaluated from the surface-normalized rate constant of the model reaction of 4-nitrophenol-reduction. The catalytic promotion by thiols probably stems from optimized electron density on AuNC. If the residual NH groups of PEI were further fully treated with glycidyltrimethylammonium chloride, the catalytic activity is again enhanced, where the accelerated mass transfer is responsible for the promotion. Overall, the catalytic activity reaches an unprecedented value (metal-normalized rate constant kc = 29.4 L mmol–1 s–1 and turnover frequency = 1623 h–1, as evaluated with the model reaction of 4-nitrophenol reduction) ever reported for supported AuNCs. Our results suggest that orthogonal ligand optimization is an effective manner of triggering the release of the catalytic potential of AuNCs, among which thiol is unique.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhaolei Zhang,Fengyan Fang,Pingping Zhang,Xiaokang Zhang,Hongchao Ma,Yanhui Wei
Efficient detection of 4- nitrophenol (4-NP) organic pollutant is always a very important issue due to the rapid development of chemical industry and the abuse of pesticides and so on. Here, we designed and synthesized a novel supramolecular fluorescent probe , 4-[4-(acetylamino)styryl]-1-cyclodextrin pyridinium p-toluenesulfonate (ASPT-β-CD), for the selective and sensitive detection of 4-NP. The introduction of β-CD not only improves the water solubility of probe and can also be used as a host to encapsulate 4-NP. In alkaline aqueous solution, the absorption spectrum of 4-NP overlaps the excitation spectrum of ASPT-β-CD and suggests that an internal filtration effect occurs between them. We explored the possible response mechanism and speculated that the high selectivity and high sensitivity were derived from the synergistic effect of inner filtering effect and host-guest interaction. Benefiting from the synergistic effect, the proposed sensor ASPT-β-CD displayed significant "turn-off" after adding 4-NP, while showing a fast response to 4-NP within 2 min and low LOD about 0.01 μM. In addition, this method has been successfully applied to the determination of 4-NP in lake water samples, indicating that the obtained ASPT-β-CD has great practical application potential in the environmental field.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Qianqian Yu,Xiaohan Sun,Meiying Wu,Zejun Pan,Jing Chen,Zhaolin Yang,Xin Li,Yudong Li,Dexiu Min,Xiaodong Li,Chengyu Wang
With the advancement of technology, the production of domestic sewage and industrial wastewater containing dyes are increasing steadily. In the evolutionary process of catalytic reduction wastewater, recyclability and homogenization are still puzzles. Herein, a wood-derived cellulose catalytic system with hierarchical pore structure was proposed based on chlorite-alkali method for efficient catalytic reduction on 4-nitrophenol (4-NP). The chlorite-alkali hydrolysis process played a significant role in enhancing channel connectivity and hydrophilicity of balsa (BS, O. pyramidale ) when removing lignin and hemicellulose. The results of cumulative complete intrusion and extrusion showed that the porosity of BS increased from 76.07 % to 92.58 % after removing components. A universal in-situ constructed tactic of PdNPs supported on a dehemicellulose BS (DHBS) without external reducing agent. Additionally, the superhydrophilic hierarchical porous wood-derived cellulose structure had a synergistic effect with plasmonic enhancement of PdNPs on the catalytic reduction of 4-NP, resulting in reducing 4-NP rapidly, which achieving a reduction efficiency of 90 % in the 90 s with the rate constant of 1.51 min −1 . The approach addressed the issue of low catalytic metal particle load and hider catalytic activity resulting from the limited thickness and porosity, and has a good application prospect in wastewater treatment.
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ACS Sustainable Chemistry & Engineering
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2026
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IF 7.3
Ziyao Li,Nan Wang,Bo Li,Xuzhuo Sun,Jing Chen
The electrocatalytic conversion of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) holds significant research value and broad application potential. The catalyst, comprising cobalt nanoparticles (Co NPs) encapsulated within nitrogen-doped carbon nanotubes (NCNTs) grown in situ on carbon paper (Co@NCNT/CP), was successfully developed. The catalyst achieved paired electrocatalytic reactions for HMF oxidation coupled with 4-nitrophenol (4-NP) reduction. Both HMF and 4-NP exhibited conversion rates exceeding 99%. The FDCA yield and selectivity reached 97%, with a Faradaic efficiency of 99%. The 4-aminophenol (4-AP) yield and Faradaic efficiency were 98%. Mechanistic studies revealed that electrochemically generated Co3+ species serve as the primary active sites for HMF oxidation. Electron interactions between the NCNTs and encapsulated Co NPs further stabilize the cobalt valence state. The structure facilitates HMF adsorption on Co NP surfaces, primarily via the Eley–Rideal mechanism, promoting catalytic conversion under high HMF concentrations. The paired electrochemical system exhibited outstanding catalytic performance and faster reaction rates for synergistic HMF oxidation and 4-NP hydrogenation than for individual reactions.
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JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Xian Liu,Like Chen,Yang Yang,Liping Xu,Junyong Sun,Tian Gan
Rational tailoring of hollow and porous bimetallic structures with excellent electrocatalytic performance is appealing yet challenging. Further, combining independent bimetallic nanoparticles with flexible two-dimensional substrate by forming stable heterocomplex is still highly desired for electrocatalysis. Herein, hierarchical PtCu alloy octahedrons with hollow interiors and nanosheet-assembled nanoshells were synthesized by a facile and efficient chemical transformation strategy using Cu 2 O as sacrificial templates. Such octahedral PtCu nanocages displayed significantly enhanced electrocatalytic activity owing to their unique hollow and porous architectures which provided easy access for analytes to the catalyst surface. Thereafter, introduction of Ti 3 C 2 T x MXene was realized via simple incubation of Ti 3 C 2 T x in solution containing the 3-aminopropyltriethoxysilane-capped PtCu, and their electrostatic interaction guaranteed the firm adsorption of PtCu nanocages on Ti 3 C 2 T x nanosheets. It turned out that the sensitivity of the hybrid sensor was remarkably improved for electrochemical monitoring of endocrine disrupting pollutants in water, exhibiting ultrawide linear ranges and sub-nanomole detection limits. The eminent electrode performance is attributed to the high specific area, fast electrochemical kinetics, decent electrical catalytic ability, and the synergistic effect between Pt, Cu, and MXene.
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