ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Leilei Dong,Yuping Wang,Yitong Hao,Jinghui Zhang,Xin Fang,Xueping Ji,Beibei Wang
A three-dimensional (3D) porous PDA–PPY hydrogel with abundant anchoring sites, which facilitates Au NPs loading and accelerates electron transfer. • The Au NPs further improve conductivity, achieve dual signal amplification of the sensor. • The TC aptamer form a stable recognition interface with high affinity and specificity toward TC. • The proposed aptasensor exhibited an extra low detection limit of 2.7 pM toward TC. • the proposed aptasensor provides a robust and effective strategy for monitoring TC residues in real samples. Herein, a sensitive and reliable electrochemical aptasensor (BSA/Apt/PDA-PPY@Au NPs/GCE) was developed for the determination of tetracycline (TC). The sensing platform was built upon a green-synthesized PDA–PPY polymer hydrogel, which provides a three-dimensional porous architecture with abundant anchoring sites and favorable conductivity, enabling efficient loading of Au nanoparticles (Au NPs) and rapid interfacial electron transfer. The TC aptamer was then robustly immobilized onto the PDA–PPY@ Au NPs nanocomposite via directional Au–S bonding, forming a stable recognition interface with high affinity and specificity toward TC. Benefiting from the dual effects of the conductive PDA–PPY hydrogel and Au NPs, the proposed aptasensor exhibited high sensitivity with an extra low detection limit of 2.7 pM and a wide linear response range of 5 pM–1 μM. Moreover, it demonstrated excellent reproducibility, selectivity and good stability. Importantly, accurate determination of TC in real samples (milk and river water) was achieved with satisfactory recoveries and accuracy, highlighting the potential of this strategy for monitoring TC residues in food matrices and environmental waters. Download: Download high-res image (273KB) Download: Download full-size image
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DOI
高影响因子
Industrial Chemistry & Materials
·
2026
·
IF 15.7
Meijuan Cao,Xiaopei Wu,Dongdong Qiu,Shouzheng Jiao,Jian Sun,Jie Zong
Improving the interfacial interaction between conductive polymers and fiber substrates is essential for developing high-performance flexible supercapacitor electrodes. Herein, a simple and scalable approach is reported to modify cotton fibers via TEMPO-mediated oxidation, introducing carboxyl groups onto the fiber surface to produce carboxylated cotton fibers (C-CF). These functional groups significantly enhance the affinity between the fiber substrate and conducting polymers. Sequential in situ polymerization of polyaniline (PANI) and polypyrrole (PPy) on C-CF results in a well-integrated composite structure with improved active material loading and optimized multi-scale pore architecture (mesoporous channels together with a preserved open macroporous fiber network). Compared with unmodified fibers, the PPy/PANI/C-CF electrodes exhibit higher porosity, stronger interfacial bonding, and enhanced electrochemical activity. The symmetric flexible supercapacitor exhibits an areal capacitance of 102 μF cm−2 and a mass-specific capacitance of 85 mF g−1 at an operating voltage of 1.0 V, with an active material loading of 1.2 mg cm−2. The optimized electrode achieves a specific capacitance of 911 F g−1 at a current density of 2 mA cm−2 and maintains 79.08% capacitance after 1000 cycles, demonstrating cycling stability. This work highlights the effectiveness of fiber surface functionalization via TEMPO oxidation in improving electrode structure and performance, offering a promising strategy for flexible energy storage applications.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Fei Zhang,Lijun Wu,Junhui Jiang,Kai Sun,Wei Zhou,Jiahong Tian,Yanqing Gao
In this study, the microwave absorption of the high-entropy oxide nanocomposite (Mn0.2Co0.2Ni0.2Fe0.2Cu0.2)3O4@PPy with a content of 40 wt % mixed in paraffin wax achieved a minimum reflection loss (RL) value of −60.76 dB and an effective absorption bandwidth (RL < −10 dB) of 6.9 GHz at a corresponding thickness of 2.15 mm. This indicates that the nanocomposite’s microwave absorption rate can exceed 99%, featuring a wider absorption bandwidth and a smaller thickness, making it an excellent wave-absorbing material. The superior impedance matching, larger attenuation coefficient, and dielectric-magnetic loss coupling effect of the wave absorber, along with the presence of multiple polarization phenomena within the material, collectively enhance the wave absorption effect. By the CST electromagnetic simulation, it was found that the simulation fitting of ε and μ closely matches the experimental results. This demonstrates that the nanocomposites possess strong microwave-absorbing capabilities, making them viable as new and efficient absorber materials. In addition, we evaluated the corrosion protection properties of the material, and the results demonstrated that it possesses significant corrosion resistance. This study confirms that (Mn0.2Co0.2Ni0.2Fe0.2Cu0.2)3O4@PPy can serve as a multifunctional nanocomposite material effective for both wave absorption and corrosion resistance across various applications and fields.
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高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Wenling Wu,Yang Cheng,Xuan Zhang,Xiangfei Wang,Jianhua Tian,Xiaoyan Wang,Jiang Guo,Jianfeng Zhu,Hongjie Luo
To address the pressing need for durable anti-corrosion protection of bronze relics, a novel synergistic multi-component hybrid coating was fabricated by integrating fluorinated Ti 3 C 2 T x (F-Ti 3 C 2 T x ) nanosheets and polypyrrole (PPy) nanoparticles into a Paraloid B72 matrix via a simple and scalable self-assembly strategy. The F-Ti 3 C 2 T x nanosheets acts as two-dimensional layered filler, forming tortuous barrier that impedes the ingress of corrosive species. PPy nanoparticles contribute to anodic passivation by promoting localized formation of metal oxide layers. Meanwhile, the B72 matrix acts as a durable support framework, improving the mechanical strength and adhesion of the coating. Together, these components form a synergistic tri-phase network that combines passive shielding, active protection, and environmental durability. The resulting F-Ti 3 C 2 T x /PPy/B72 coating exhibited a high static water contact angle (152.6°), which conferred outstanding self-cleaning capability. After 21 days of UV aging and temperature-humidity cycling, the coating retained hydrophobicity and surface integrity. Electrochemical impedance spectroscopy revealed that the impedance modulus at 0.01 Hz increased by nearly three orders of magnitude compared to bare bronze, while the corrosion current density decreased significantly, confirming enhanced long-term corrosion resistance. Furthermore, the coating preserved the aesthetic integrity of bronze artifacts (ΔE<3), satisfying critical conservation standards. This integrated strategy offers a novel and effective approach for designing protective coatings for cultural heritage preservation and broader outdoor metal protection applications, especially under harsh environmental stressors.
研究领域:
材料科学
·
文物保护
·
表面工程
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电化学
·
纳米技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yunping Wang,Chenlin Mu,Jingtao Bi,Mengmeng Sun,Yingying Zhao
The monovalent cation exchange membrane (MCEM) plays a crucial role in strategic resource recovery fields such as lithium/magnesium separation and seawater softening. This study proposes a two-stage modification strategy of “nanoparticle deposition – quaternization cross-linking”: first, deposit the Polypyrrole -Polyethyleneimine (PPY-PEI) composite nanoparticles in situ on the commercial Cation Exchange Membrane (CEM) surface, and then undergo quaternization cross-linking to prepare a high-performance monovalent cation exchange membrane (MCEM). The rigid structure of Polypyrrole -Polyethyleneimine (PPY-PEI) nanoparticles completely avoids the traditional problem of monomer penetration, and the rate of membrane pore blockage is significantly reduced. Electrified nanoparticles form gradient nanochannels to achieve dual mechanism synergy: The surface positive charge layer repels and blocks Mg 2+ through the Donnan effect; 2–5 nm mesoporous channels facilitate K + transport through size sieving. Subsequent quaternization crosslinking strengthened the modified layer and increased the positive membrane charge density, leading to further improvement in perm-selectivity. The results show that the modified membrane achieves a breakthrough performance in the separation of K + /Mg 2+ : the selectivity reaches 6.9; the K + flux remains at 0.14/(m 2 ·s). Molecular dynamic simulation of the ion diffusion behavior confirmed that the presence of Polypyrrole -Polyethyleneimine (PPY-PEI) can accelerate the diffusion rate of K + while limiting the transport of Mg 2+ , providing a theoretical basis for the performance prediction of selective ion exchange membranes.
研究领域:
膜科学与技术
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分离工程
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材料化学
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环境功能材料
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离子传输
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电化学
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资源回收
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Cong Li,Nuramina Abdukirim,Tursun Abdiryim,Ruxangul Jamal,Feng Xu,Yaoming Yu,Sihuleng Ba
Oxygen vacancy (V O ) engineering is an effective strategy for enhancing the performance of electrocatalytic CO 2 reduction (eCO 2 RR) to CO. In this study, composite materials of zinc oxide (ZnO) and polypyrrole (PPy) were prepared via in situ polymerization, with the V O concentration precisely controlled by adjusting the PPy molar ratio. The V O concentration first increased and then decreased as the PPy content decreased, while the zinc vacancy (V Zn ) concentration exhibited an opposite trend. Characterization results indicate that the PPy conjugated framework dynamically regulates the V O /V Zn concentration through electron injection, and its controllable hydrophobicity enhances CO 2 mass transfer and interfacial enrichment. Crucially, experiments reveal that a high V O concentration is key to achieving high performance, as V O reduces the activation energy barrier for C O bond cleavage through charge redistribution, synergistically optimizing the adsorption energy of the *COOH intermediate. Density functional theory calculations confirm that Vo regulates the d-band center position of ZnO and reduces the activation energy barrier for CO 2 activation. The optimal sample, V O -enriched ZnO/PPy-4, achieves an FE CO of 73.8 % at −1.6 V (vs. RHE) and stably maintains CO/H 2 ratio of 2:1 at −1.2 V (vs. RHE), with < 5 % decay rover 8 h. This study demonstrates a strategy for obtaining high-performance electrocatalytic CO 2 reduction catalysts by regulating Vo concentration.
研究领域:
材料科学
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电化学
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催化
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纳米技术
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环境科学
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化学工程
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 8
·1160
·
IF 4.7
Ahmed Elhassan,Xiaoshuang Lv,Ibrahim Abdalla,Jianyong Yu,Zhaoling Li,Bin Ding
Ever-increasing electromagnetic pollution largely affects human health, sensitive electronic equipment, and even military security, but current strategies used for developing functional attenuation materials cannot be achieved in a facile and cost-effective way. Here, a unique core-shell-like composite was successfully synthesized by a simple chemical approach and a rapid microwave-assisted carbonization process. The obtained composites show exceptional electromagnetic wave absorption (EMWA) properties, including a wide effective absorption band (EAB) of 4.64 GHz and a minimum reflection loss (RLmin) of −26 dB at 1.6 mm. The excellent performance can be attributed to the synergistic effects of conductive loss, dielectric loss, magnetic loss, and multiple reflection loss within the graphene-based core–shell-like composite. This work demonstrates a convenient, rapid, eco-friendly, and cost-effective method for synthesizing high-performance microwave absorption materials (MAMs).
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Small
·
2024
·Vol. 20
·期 49
·2406001
·
IF 13
Liwen Zhang,Jiawei Du,Peng Tang,Xueying Zhao,Chuangwei Hu,Yu Dong,Xuyang Zhang,Nana Liu,Bo Wang,Ruihui Peng,Yaohong Zhang,Guohua Wu
Regulating the different growth states of polypyrrole (PPy) is a key strategy for obtaining PPy composites with high electromagnetic wave (EMW) absorption properties. This work finds that the growth states of PPy is regulated by controlling the amount of pyrrole added during the preparation of composites, so as to regulate the development of conductive networks to obtain excellent EMW absorption performance. The POP/PPy-200 composite achieves an effective absorption bandwidth (EAB) of 6.24 GHz (11.76–18.00 GHz) at a thickness of only 2.34 mm, covering 100% of the Ku band. The minimum reflection loss of −73.05 dB can be demonstrated at a thickness of only 2.29 mm, while at the same time showing an EAB of 5.96 GHz to meet the requirements of “thin”, “light”, “wide”, and “strong”. Such excellent EMW absorption performance is attributed to the conductive loss caused by the regulation of the growth states of PPy and the polarization loss caused by the heterostructure. This work also addresses the key challenge that porous organic polymers (POPs) cannot be applied to EMW absorption due to poor conductivity and providing new insights into the candidates for EMW absorbing materials.
研究领域:
材料科学
·
电磁学
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DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2024
·
IF 6.4
Min Wang,Minhan Cheng,Chuanliang Chen,Qiang Fu,Hua Deng
Solar-driven interfacial water evaporation technology is considered as a promising clean water production strategy addressing the issues of global water pollution and scarcity. In this study, highly efficient polyvinyl alcohol/carbon nanotube/polypyrrole (PVA/CNT/PPy) aerogel evaporator is fabricated by combining hydrophilic PVA aerogel with superior water absorption property and carbon-based fillers with coupled photo-thermal conversion effects. By regulating the pore structure of PVA aerogel, the capillary effect is enhanced, thereby optimizing the water transport rate. Based on the photo-thermal effect, the evaporation rate of the evaporator under one standard solar irradiation (1 kW m −2 ) is 3.17 kg m −2 h −1 . Additionally, after the input of electrical energy, the heat converted from light absorbed by carbon-based material can promote the Joule heating effect, and the synergistic effect further increases the evaporation rate of the aerogel to 5.59 kg m −2 h −1 when subjected to one solar irradiation combined with a 5 V input voltage. This electro-thermal assistance enables efficient water evaporation even in low-light and dark conditions. Furthermore, the PVA/CNT/PPy aerogel evaporator demonstrates significant potential in terms of desalination performance and long-term stability.
研究领域:
材料科学
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环境科学
·
能源科学
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Hangchun Deng,Jie Huang,Zhiyong Hu,Xiangfei Chen,Dejuan Huang,Tianxiang Jin
A three-dimensionally interconnected molybdenum trioxide (MoO3)/polypyrrole (PPy)/reduced graphene oxide (rGO) composite was synthesized via an eco-friendly three-step method. The as-obtained electrode shows a high specific capacity of 412.3 F g–1 at a current density of 0.5 A g–1 and a good cycling stability (85.1% of the initial specific capacitance after 6000 cycles at 2 A g–1 is retained), and these excellent electrochemical performances can be attributed to the unique structure, remarkable electrical conductivity, and the synergetic effects between MoO3, PPy, and rGO. Furthermore, a symmetric supercapacitor based on a MoO3/PPy/rGO electrode was assembled to investigate the practical application performance of this material. The results demonstrate a high energy density of 19.8 W h kg–1 at a power density of 301 W kg–1. These findings shine a light on the rational design of electrode materials with multicomponents for high-performance supercapacitors.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 6
·1898-1905
·
IF 3.348
Datong Wu,Xue Cheng,Tianze Zhang,Hong Gao
With the development of technology, life is full of electromagnetic pollution; therefore we need to shield the electromagnetic signals that are undesirable and harmful to us. In this work, polypyrrole (PPy)/polydopamine (PDA)/Ti 3 C 2 T x composites were successfully prepared for electromagnetic interference shielding applications by a simple polymerization method and mixing process. We investigated the electrical conductivity, thermal properties, electromagnetic interference shielding effect (EMI SE), and its EMI attenuation mechanism of PPy/PDA/Ti 3 C 2 T x composites. By adjusting the content of Ti 3 C 2 T x in the PPy/PDA/Ti 3 C 2 T x composites (from 0 to 12 vol%), the conductivity of the composites increased considerably from 34.6 to 884.1 S m −1 , and the maximum EMI SE of the composites in K u -band varied accordingly from 4.30 to 21.82 dB. Additionally, the thermal stability of the PPy/PDA/Ti 3 C 2 T x (12 vol%) composite was improved due to the addition of Ti 3 C 2 T x and PDA, with a change in mass loss from 59.25% to 29.34% at 900°C. These results highlight that the investigated PPy/PDA/Ti 3 C 2 T x composites are promising materials for EMI shielding.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·833
·
IF 4.034
Zhi Zhang,Qi Lv,Yiwang Chen,Haitao Yu,Hui Liu,Guangzhen Cui,Xiaodong Sun,Ling Li
To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.Keywords:graphene;polypyrrole;sandwich-like structure;electromagnetic absorption
研究领域:
材料科学
·
电磁学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）