BIORESOURCE TECHNOLOGY
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2017
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IF 5.651
Zheng-Zhe Zhang,Jia-Jia Xu,Zhi-Jian Shi,Ya-Fei Cheng,Zheng-Quan Ji,Rui Deng,Ren-Cun Jin
The increasing application of engineered nanoparticles (NPs) has posed an emerging challenge to wastewater treatment processes. The short-term impacts of CuNPs, CuONPs, ZnONPs and AgNPs on anaerobic ammonium oxidation (anammox) process were investigated firstly in this study. CuONPs, ZnONPs and AgNPs up to 50 mg g −1 suspended solid (SS) did not affect anammox activity, reactive oxygen species (ROS) production or cell membrane integrity. However, 1.25 mg g −1 SS CuNPs significantly inhibited the anammox activity and the loads that caused 50% inhibition were 4.64 ± 1.24 and 3.27 ± 0.79 mg g −1 SS for anammox granules and flocs, respectively. 5 mg g −1 SS CuNPs caused serious accumulation of the toxic intermediate N 2 H 4 . Furthermore, CuNPs interacted with extracellular polymeric substances by specifically bonding to tyrosine or tryptophan-containing groups, C-O-C in polysaccharides and –OH in polymeric compounds. Therefore, this study calls for more attention to the risks of NPs to the anammox-based processes.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
LANGMUIR
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2023
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IF 3.9
Pingtao Ming,Yuanyuan Niu,Yongxin Liu,Jinhao Wang,Haohong Lai,Qing Zhou,Haiyun Zhai
In this study, the synthesis of Cu-MOF-199@multiwalled carbon nanotubes (Cu-MOF-199@MWCNTs) composites was achieved and utilized to create an advanced electrochemical sensor for creatinine (Cre) detection. The composites were modified on a glassy carbon electrode surface through direct drip coating, followed by the deposition of copper nanoparticles (CuNPs) via constant potential deposition. Characterized by various techniques and electrochemical analyses, the Cu-MOF-199@MWCNTs composite increased the CuNPs load, improving the detection sensitivity for Cre. Under optimal conditions, the modified electrode exhibited good linearity across a broad range of Cre concentrations (0.05–40.0 μM) with a low detection limit of 11.3 nM. The developed sensor demonstrated remarkable stability, reproducibility, and selectivity, showing promise in sensitive and accurate Cre detection in serum samples.
研究领域:
生物医学工程
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分析化学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2026
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IF 7.8
Xianjin Yang,Enxiang Jiao,Xuehai Zhang,Ke Zhang,Anbang Sun,Yanwei Zhao,Huimin Wang,Zheng Cao,Peng Lv,Haijun Zhang,Hongwang Shen,Fulai Zhao
The rapid advancement of 5G communication technology necessitates enhanced performance in electromagnetic interference (EMI) shielding and thermal management materials. We fabricated multifunctional nacre-like MXene@CuNPs(MSC)composite films via intermittent filtration and in situ reduction. The resulting composite film exhibited a high in-plane thermal conductivity of 47.6 W m–1 K–1 and demonstrated superior thermal management capability in heat dissipation tests. Containing 3.1 wt % Cu and with a thickness of 0.04 mm, the film achieved an average EMI shielding effectiveness (SE) of 64 dB within the X-band (8.2–12.4 GHz). Calculations based on the effective medium theory (EMT) elucidated the critical role of Cu nanoparticles (CuNPs) in establishing an efficient thermal conduction network. Owing to the CuNPs acting as thermal bridges, the interfacial thermal resistance within the composite film decreased by 35.6%. Furthermore, the MSC composite films exhibited rapid-response photothermal behavior. Upon irradiation with a light power density of 200 mW cm–2, the surface temperature of the MSC3.1 film rapidly reached 101 °C. The outstanding performance of this composite film underscores the broad application potential of Cu-modified MXene in electronic devices and related fields.
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PubMed
高影响因子
ANALYTICAL LETTERS
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2023
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IF 2
Jie Zhang,Yulin Fu,Lin Li,Liqiang Yan,Xiongzhi Wu,Chenghong Lei
Ascorbic acid (AA) determination is of high importance in the diagnosis and treatment of diseases. Herein, we report a new ratiometric electrochemical sensor for ascorbic acid using a glassy carbon electrode (GCE) modified with a copper nanoparticle@resin nanosphere nanocomposite (CuNPs@RNS). The ratiometric strategy was established by immobilizing an internal reference (thionine) on the modified electrode using cyclic voltammetry (CV). The performance of the modified electrodes as well as the newly established ratiometric strategy was explored. The sensing platform had good electrocatalytic ability, reproducibility, and stability. In addition, the ratiometric strategy significantly improved the performance of electrochemical sensing with a wide linear range (0.0837 to 15.5 μM) and a low detection limit of 0.0279 μM under the optimal conditions. The original ratiometric electrochemical sensor was successfully applied to monitor ascorbic acid in tablets and urine. These results showed that the sensor provides a new strategy and broad prospects for biomolecular sensing with reliability and high sensitivity.
研究领域:
分析化学
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生物医学工程
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电化学传感
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DOI
高影响因子
TALANTA
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2013
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IF 3.498
Lingling Xi,Fengli Wang,Zuoyi Zhu,Zhongping Huang,Yan Zhu
A novel Cu nanoparticles/reduced graphene oxide–chitosan (CuNPs/r-GO–chitosan) composite film modified glassy carbon electrode (GCE) was fabricated by dispersing CuNPs uniformly on a stable r-GO–chitosan thin film through electrodeposition process. The modified electrode was characterized by cyclic voltammetry , scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), and exhibited efficiently electrocatalytic oxidation toward monosaccharides with high stability. The good electrocatalytic activity of this modified electrode might be attributed to the synergistic effect of r-GO and CuNPs, and the stability might be attributed to the r-GO and chitosan thin matrix film. When the CuNPs/r-GO–chitosan/GCE was used as an electrochemical sensor in high performance anion exchange chromatography-direct current amperometric detection (HPAEC-DC) flowing system for the determination of monosaccharides under constant working potential of +0.55 V, the detection limits ( S / N =3) ranged from 0.006 to 0.02 mg L −1 for the analyzed sugars, and the dynamic linear ranges spanned from 0.02 to 500 mg L −1 . The proposed method has been applied for the determination of monosaccharide composition of crude polysaccharides from phellinus igniarius real samples, and the results were satisfactory.
研究领域:
分析化学
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生物化学
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产品关联
DOI
PubMed
高影响因子
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