ELECTROCHIMICA ACTA
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2014
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IF 4.086
Zhenping Liu,Haiyun Zhai,Zuanguang Chen,Qing Zhou,Zhixian Liang,Zihao Su
A novel Fe 2 O 3 nano-materials/oxygen functionalized multi-walled carbon nanotubes/triton X-100 modified carbon paste electrode (Fe 2 O 3 /MWCNTs-COOH/OP/CPE) was prepared to simultaneously detect orange G (Or G) and orange II (Or II) by electrochemical methods. Compared with the bare carbon paste electrode (CPE), Fe 2 O 3 /MWCNTs-COOH/OP/CPE exhibited obvious electrocatalytic activities towards Or G and Or II. Furthermore, the two azo dyes were identified and separated successfully, and were simultaneously determined by the redox peaks in cyclic voltammograms (CVs) and differential pulse voltammogram (DPV) under optimum conditions. In DPV, anodic peak current (Ipa) and concentrations were linearly related well for 0.1-20.0 μM Or G and 0.2-50.0 μM Or II. The limits of detection (S/N = 3) of Or G and Or II were 0.05 μM and 0.1 μM, respectively. Therefore, the electrode is suitable for the determination of Or G and Or II in industrial wastewater due to high sensitivity and selectivity, low detection limit, good reproducibility, as well as easy preparation and regeneration.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Wei Zhong,Jin Zou,Yanyu Xie,Jing Yang,Mingfang Li,Shuwu Liu,Yansha Gao,Xiaoqiang Wang,Limin Lu
Herein, a highly sensitive and selective electrochemical sensor for the detection of benomyl (BN), a typical benzimidazole fungicide was proposed based on hierarchical nano-Cu x O decorated MWCNTs-COOH/MXene (nano-Cu x O-MWCNTs-COOH /MXene) composite. The ternary heterostructure presents good electrical conductivity, large specific surface area, and high catalytic activity, exhibiting excellent electrocatalytic activity with enhanced electrochemical signals towards the oxidation of BN. Besides, the embedded nano-Cu x O particles possess strong affinity toward benzimidazole molecules, which could promote the preconcentration of BN, further enhancing the sensitivity, as well as ensuring the high selectivity. Benefitting from the synergistic effect of components in the composite, the developed sensor presents a broad linear range from 10.0 nM to 10.0 μM with a low limit of detection of 3.0 nM (S/N = 3). Meanwhile, the nano-Cu x O-MWCNTs-COOH/MXene electrode also displays good long-term stability and repeatability. Furthermore, this method was successfully applied for the detection of BN in apple samples, illustrating its promising practicability.
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Kemiao Nan,Ran Jia,Weibo Feng,Shize Qu,Qi Shen,Yan Lin,Bing Zheng,Xiaodong Ma
Currently, the application of SPME techniques for multi-residue pesticide analysis is highly limited. In this study, a polypyrrole (PPy) doped with carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) in-tube solid-phase microextraction (IT-SPME) nanocomposite was designed and fabricated by the electrodeposition method. The preparation parameters, such as Py concentration and MWCNTs-COOH content, were optimized. The morphology and structure of the coating were evaluated using SEM and FT-IR which revealed a distributed coating with a coarse and fine grid-like structure, achieving the desired structural integration. Additionally, experimental factors affecting extraction efficiency were optimized, such as sample volume, eluent type, etc. This method indicated a great linear range of 1–500 μg L −1 and high correlation coefficients (R 2 ) above 0.9971. The limit of detection (S/N = 3) and quantification (S/ N = 10) were 0.12–1.27 μg L −1 and 0.41–4.22 μg L −1 . The relative standard deviations (RSDs) for intra-day and inter-day analyses were in the ranges of 1.02–12.17% and 3.10–13.15%, respectively. The method achieved satisfactory spiked recovery rates ranging from 80.34% to 103.23%. Furthermore, MWCNTs-COOH/PPy coating holds outstanding stability and selectivity. Therefore, the developed IT-SPME approach was successfully used in the analysis of actual environmental water samples.
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高影响因子
POLYMER COMPOSITES
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2025
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IF 4.7
Fukang Li,Ning Ding,Jean Jacques Kouadjo Tchekwagep,Martin Pengou,Hervé Kouamo Tchakouté,Qiuyue Ding,Nan Hou,Huixia Xu
Carbon fiber reinforced polymers (CFRP) composites, prized for their outstanding mechanical properties, have garnered extensive applications across critical industries including aerospace, transportation, new energy systems, and power infrastructure. However, under increasingly demanding service environments, improving the interlaminar fracture toughness of CFRP composites has become a pivotal challenge to ensure structural integrity and longevity. The present work presents an effective design strategy to address this issue for the carbon fiber/epoxy/core-shell rubber composite by integrating multi-scale reinforcements. The mechanical performance of specimens with different compositions was systematically analyzed. Synergistic multi-scale toughening mechanisms were rigorously elucidated through fracture surface morphology analysis and correlative mechanical data interpretation. The results demonstrate that incorporating short carbon fibers (SCF) into CFRP (i) and adding core-shell rubber (CSR) to CFRP (ii) both significantly enhance the toughness. CFRP (iii), which contains both SCF and CSR, exhibits an even more pronounced toughening effect. The subsequent grafting of carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) onto SCF, resulting in CFRP (iv) with SCF-CNTs and CSR mixed, demonstrates superior interlaminar fracture toughness compared to CFRP (iii). Specifically, the G IC $$ {G}_{\mathrm{IC}} $$ and G IC $$ {G}_{\mathrm{IC}} $$ of CFRP (iv) increase by 12.89% and 15.46%, respectively, compared to CFRP (iii). This improvement is attributed to the strengthened interfacial bonding between MWCNTs-COOH and the matrix through mechanical interlocking, which enhances fiber bridging and the effects of core-shell rubber. This multi-scale reinforcement paradigm provides critical insights into the design of damage-tolerant CFRP composites for extreme operational scenarios, advancing their deployment in next-generation engineering systems subjected to complex mechanical loads.
研究领域:
材料科学
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复合材料
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聚合物基复合材料
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机械工程
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纳米复合材料
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高影响因子
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