SYNTHETIC METALS
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2022
·
IF 4
Mengmeng Hou,Huiling Gu,Ji Huang,Hongtao Guan,Shuangxi Xing
In order to develop microwave absorbing materials with strong absorption capacity, wide bandwidth and light weight, three-dimensional (3D) PANI/CeO 2 composite aerogel was prepared by in-situ synthesis method in this work. The CeO 2 nanorods are observed to be interlinked with PANI aerogel to form a porous nanofiber structure. The PANI/CeO 2 composite aerogel exhibits excellent absorption performance with an absorption peak of − 53.68 dB under a moderate thickness of 2.5 mm, and the effective absorption bandwidth (EAB) achieves 4.44 GHz. The excellent microwave absorption performance of PANI/CeO 2 composite aerogel was ascribed to the interfacial polarization relaxation and space charge polarization by virtue of the 3D conductive network. Furthermore, the oxygen vacancy defects arising from the CeO 2 nanostructure also contribute greatly to the microwave absorption.
研究领域:
材料科学
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电磁材料
·
纳米技术
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DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Lei Tian,Qi Guo,Luting Yan,Yuhao Zhang,Zekun Ren,Chao Wang,Xia Sun,Yemin Guo,Yanyan Zhang
Heavy metal cadmium (Cd (II)) contamination in aquatic products poses severe health risks, necessitating rapid, accurate, and portable detection methods. Traditional electrochemical sensors often suffer from background interference and low accuracy, especially when utilizing stainless steel acupuncture needles as electrodes. Single-signal systems are prone to environmental fluctuations, limiting reliability. Thus, there is an urgent need for a sensitive, low-cost, and visual sensor that integrates dual detection modes for on-site analysis of Cd (II). We report a novel ratiometric/colorimetric dual-mode aptamer sensor based on a polyaniline-gold nanocomposite (PANI@Au)-modified acupuncture needle. This platform uses PANI's peak at −0.9 V as an internal reference and His-Pd@aptamer's peak at −0.2 V as a detection signal, enabling ratiometric electrochemical quantification. In parallel, His-Pd nanoparticles catalyze the oxidation of TMB to produce a blue color, allowing visual detection with a limit of 3.10 × 10 −2 ng/L. RGB values are analyzed by a smartphone and WeChat mini-program for rapid result output. The electrochemical and colorimetric modes demonstrated excellent sensitivity (LOD: 3.40 × 10 −2 ng/L electrochemical; 1.06 × 10 −1 ng/L RGB-based) and linear range of 10 1 –10 8 ng/L. The sensor showed strong selectivity, stability, and successful application in detecting Cd (II) in fish, shrimp, and scallop samples with high recovery rates. This is the first report of a needle-based ratiometric/colorimetric aptamer sensor that enables both electrochemical quantification and smartphone-based visual detection of Cd (II). The device supports rapid, on-site, and low-skill operation with sub-100 μL samples, demonstrating its potential for real-time monitoring of heavy metal contamination in aquatic food safety.
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chun-Yang Li,Tong Zhai,Wentao Gu,Huan Lv,Xue-Meng Ji,Man-Man Wang,Jing-Min Liu,Shuo Wang
Advanced glycosylation end products (AGEs) are becoming a prominent issue in the biomedical and food safety industries because of their strong relationship to human health. Here, a MIL@PANI@LDH photocatalyst was prepared by in-situ growth method, realizing thorough elimination of AGEs for the first time. The synthesized photocatalysts used MIL-101 holding remarkably specific surface area as the core and PANI with a large number of amino and imine groups as the linker to ensure excellent adsorption capacity. The lamellar LDH structure grown in the outermost layer, on the other hand, introduces a narrower band gap and stronger light absorption ability, capable of activating sodium persulfate (PS) and generating free radicals with powerfully oxidizing ability. They work in concert to achieve the effective degradation. Through the optimization of the reaction conditions, the best photochemical performance could be achieved with a Zn/Al molar ratio of 3:1, and the degradation rates of AGEs were greater than 99.8 % (within 150 min). Additionally, multiple radical synergistic and non-radical action pathways involved in the system were revealed. The precision-engineered catalysts also exhibited high stability, reusability, and desirable biosafety, offering an effective and sustainable solution to the problem of purifying hazardous substances in real application.
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产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xu Pan,Fei Li,Ye Chen,Qing Wen,Xiaoqian Li,Junhong Wang,Haitao Xu,Liuqingying Yang
As a green conversion/energy storage device, the practical application of microbial fuel cell (MFC) was limited with its low power generation. The extracellular electron transfer efficiency was one of the key factors affecting the power generation performance of MFC. This paper reported the carbonized derivative Co-Ni-ZIF@NC derived from PANI-doped Co-Ni-ZIF with conductivity, biocompatibility and high electrocatalytic activity. Density functional theory (DFT) confirmed the strong interaction between the electrode surface and microorganisms. The maximum power density of the MFC with Co-Ni-ZIF@NC anode (8.67 W/m 3 ) was 1.47 time higher than that of Co-Ni-ZIF@C-800 (5.96 W/m 3 ). High-throughput sequencing revealed that Co-Ni-ZIF@NC catalyst facilitated the screening of relevant functional microbial communities in microbial membranes, leading to the reinforcement of power generation in MFC. PICRUSt predicted the relative abundance of functional genes, confirmed the spontaneous enrichment behaviour of functional microorganisms to the electrode surface, and identified cytochrome c552 as the dominant role in the EET process. The above foregoing mainly due to the doping of PANI, improved the content of pyrrolic N on the surface of derivatives, protected the original crystal morphology, promoted the approaching behaviour of conductive flagella to the anode surface and shortened the electron transport distance, thus Co-Ni-ZIF@NC exhibited superb bioelectrocatalytic activity.
研究领域:
能源材料
·
电化学
·
微生物电化学系统
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计算化学
·
环境生物技术
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DOI
高影响因子
ANALYTICAL LETTERS
·
2023
·
IF 2
Jian Huang,Guolin Yuan,Dongliang Cheng,Fei Xie,Xianru Xia,Xiandong Li,He An,Chunyan Peng
Atherosclerotic coronary heart disease (CHD) is ischemic and a worldwide health issue. The soluble suppression of tumorigenicity 2 (sST2) is a novel biomarker for atherosclerotic coronary heart disease. This work develops an immunosensor with a nanocomposite consisting of polyaniline (PANI) and MXene-Nafion for the specific and sensitive determination of sST2. PANI was first electropolymerized on a glassy carbon electrode (GCE) to enhance electron transfer. Subsequently, MXene-Nafion dispersion was drop cast on the PANI/GCE substrate to further increase the electrical conductivity and immobilize anti-sST2 which captures sST2 for detection. The current response as a function of sST2 concentration was measured by differential pulse voltammetry (DPV). Under the optimal conditions, this immunosensor demonstrates a linear range from 1 pg mL−1 to 1 μg mL−1 and a detection limit of 0.149 pg mL−1. The device offers high sensitivity, excellent specificity, satisfactory reproducibility, good stability, and has significant potential for detecting clinical biomarkers. In addition, the immunosensor is able differentiate between serum of healthy people and CHD patients.
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Tai-Cheng Lu,Yi-Ting Lin,Wen-Biao Xiao,Qing-Zhen Qiu,Hui-Yun Tian,Yun Lei,Ai-Lin Liu
Developing the portable CRP detection technologies that are suitable for point-of-care (POC) and primary care management is of utmost importance, and advancing the electrochemical immunosensors hold promise for POC implementation. Nevertheless, non-specific adsorption of numerous interfering proteins in complex biological media contaminates immunosensors, thereby restricting the reliability in detection efficacy. In this study, a three-dimensional flower-leaf shape amyloid bovine serum albumin/gold nanoparticles/polyaniline (AL-BSA/AuNPs/PANI) coating on the surface of the electrode was developed, which demonstrated strong anti-adsorption properties against bovine serum albumin, plasma, and cells. The immunosensor exhibited a good linear relationship to CRP response, featuring a detection limit of 0.09 μg/mL, consistent with clinical reference range. In addition, the CRP immunosensor demonstrated excellent specificity in other inflammation-related proteins and commendable anti-interference performance for CRP detection in plasma and whole blood tests. Importantly, by combining the development of a USB flash disk-type portable electrochemical workstation with a reagent-free mode, the developed CRP electrochemical immunosensor delivered ideal results in clinical samples. The anti-fouling performance, sensitivity and specificity of the immunosensor, as well as its flexible test modes in clinical samples, provide important scientific basis for developing POC detection technologies of vital biomarkers in complex biological media.
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 8
·2482-2489
·
IF 6.177
Nan Sun,Yong Zhang,Xinru Li,Yuhan Jing,Zhengdong Zhang,Yu Gao,Jianqi Liu,Honglin Tan,Xiaoming Cai,Jinming Cai
Copper-based photocatalysts have attracted considerable attention because of their great prospects in photochemical conversions. However, there are still challenges faced during the preparation of copper-based photocatalysts with have high catalytic efficiency and high stability. In this study, polyaniline (PANI) was doped in an ultra-thin graphitized polyacrylonitrile (g-PAN) layer (denoted as CI), and Cu nanoparticles (NPs) were wrapped in the CI layer encapsulated on SrTiO3 (STO), which is designed as an efficient and low-cost photocatalyst for photocatalytic hydrogen production under visible light irradiation. Benefiting from the unique CI layer structure, the optimized Cu@CI/STO photocatalytic hydrogen evolution rate obtained was 371 μmol g−1 h−1, which is higher than the hydrogen evolution rate of Cu@g-PAN/STO (265.25 μmol g−1 h−1). Moreover, the CI layer demonstrated a quasi-cocatalyst effect. The ultra-thin CI layer not only protects the Cu NPs from oxidation but also promotes charge separation, which distinctly boosts H2 evolution, as indicated by the photoluminescence emission spectra, EIS Nyquist diagram and Mott–Schottky diagram. In addition, the degradation rate of Cu@CI/STO is approximately 4-fold higher than that of Cu/STO in the photocatalytic degradation of 4-nitrophenol under visible light. This study delivers a new method to protect Cu NPs and demonstrates the prospect for the rational design of copper-based photocatalysts with high stability and efficiency.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zihan Qi,Murong Xi,Zhenjie Liu,Rui Sheng,Wei Wang,Tianlong Wu,Yudai Huang
The Zn/electrolyte interface stability is related to HER, passivation, dendrites, corrosion and Zn 2+ deposition orientation. Reducing the occupation of H 2 O dipoles in the inner layer of electrical double layer (EDL) is conducive to the inhibition of interfacial side reactions and directing the deposition of Zn 2+ along the (002) crystalline surface, which are beneficial to the reduction of dendrites and the improvement of plating/stripping reversibility. A mechanism is elucidated by which Acetyl-L-carnitine Hydrochloride (A-L-CN) reconfigures the EDL structure and guides the selective deposition of Zn 2+ in this paper. Theoretical calculations show that A-L-CN can cover the high-energy active sites on the Zn (101) crystal plane and control the specific crystal orientation of the deposits along the (002) crystal plane to produce faceted epitaxial growth. The electrochemical test results show that the Zn anode has excellent plating/stripping reversibility as well as good cumulative capacity (10 mA cm −2 , 1 mA h cm −2 , ACE of 99.80 %, CPC of 7,753 mA h cm −2 ). The assembled Zn 2+ hybrid supercapacitor (ZHS) and Zn//PANI full cell show excellent performance (ZHS up to 60,000 cycles; the capacity retention ratio of Zn//PANI full cell is 76.7 % after 1,000 cycles). The work offers the possibility of achieving stabilized Zn/electrolyte interface performance.
研究领域:
电化学
·
材料科学
·
储能技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）