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
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiuping Li,Te Hu,Na Li,Zhihuan Weng,Lishuai Zong,Siyuan Dong,Xiaolin Zhang,Cheng Liu
The challenge in environmental pollution urgently demands sustainable and green materials as new material candidates for electrochemical sensors. In this study, bamboo derived from abundant and renewable resources is considered as a functional and sustainable substrate material for electrochemical sensor. Novel bn-Ag@PPy/BC electrochemical sensor is prepared by in-situ polymerization of polypyrrole (PPy) on bamboo chips (PPy/BC) then electrochemical deposition of dendric nano Ag on PPy/BC. Various structural characterizations of bn-Ag@PPy/BC indicate that bamboo chips are encased by PPy and dendric nano Ag were homogeneously distributed on the PPy/BC. The bn-Ag@PPy/BC shows high sensitivity as 205 μA mM−1 cm−2 with good linearity in the formaldehyde concentration range of 0-4.5 mmol/L. Meanwhile, bn-Ag@PPy/BC presents high selectivity and excellent reproducibility (RSD=3.66%). Moreover, bn-Ag@PPy/BC exhibits excellent degradation properties with weight residual of 83.66% during 57 days’ degradation in soil, which is much better than some degradable materials. The bn-Ag@PPy/BC will be a promising candidate for cost effective, degradable, sustainable and environmentally friendly electrochemical sensor.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Nazhen Zhang,Songyang Sun,Yue Zhong,Mingzhong Li,Yongjie Lin,Yanwei Li,Cong Liu,Yanhui Li
This study synthesizes a photo controlled intelligent covalent organic framework (AZO-TBPP-COF) using photoisomeric small molecule p -aminoazobenzene as a linker and meso-tetra (p-bromophenyl) porphyrin (TBPP) as monomer via Buchwald Hartwig coupling reaction. AZO-TBPP-COF has improved the light absorption range and band gap compared with TBPP, which enable AZO-TBPP-COF has a more negative band gap to achieve great potential in photocatalytic degradation of organic pollutants and reduction of heavy metal ions. The adsorption of AZO-TBPP-COF towards organic dyes and heavy metal pollutants showed significant differences before and after structural torsion irritated by light irradiation. After UV irradiation, the dark adsorption rate of methylene blue by cis AZO-TBPP-COF increased by nearly 2.6 times. The cis-trans isomerization of azobenzene under visible light causes changes in the microstructure of AZO-TBPP-COF, directly affecting the zeta potential and adsorption capacity. And the increased zeta potential of COF after structural inversion, reduces the electrostatic repulsion towards positively charged organic dyes. Meanwhile, stable trans AZO-TBPP-COF exhibits excellent photocatalytic performance against organic dyes and heavy metal ions in the visible light range compared to TBPP. Therefore, the adsorption and photocatalytic abilities of light regulated AZO-TBPP-COF highlight the important applications of intelligent porous organic materials in internal ion transport, energy conversion, and environmental remediation.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Qingye Zhao,Xuanpan Xu,Haoyun Dou,Rongjie Zhe,Ziwei Zhao,Long Chen,Hong-En Wang
Lithium-sulfur batteries (LSBs) are poised to revolutionize next-generation energy storage due to their high energy density. However, the “polysulfide shuttle effect” poses a critical challenge to their cycling stability. Herein, we introduce a cation-deficient TiO 2 /polypyrrole (Ti 1-x O 2 /PPy) nanocomposite-modified polypropylene separator designed to mitigate this issue. This novel separator effectively captures and catalytically transforms polysulfides (LiPSs) during charge/discharge cycles, thereby enhancing LSB cycling stability. Notably, the modified separator enables an LSB to retain 708.8 mAh g −1 after 300 cycles at 0.5C and an impressive 554.1 mAh g −1 after 1000 cycles at 1C. Our findings not only present a promising approach to separator modification for LSBs but also offer critical insights into manipulating electrochemical reactions, potentially driving future improvements in LSB technology.
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ACS Biomaterials Science & Engineering
·
2025
·
IF 5.5
Huijun Yu,Xiao Xu,Xian Wang,Xiaonan Qiu,Qinxin Wang,Mengke Lu,Fengyi Du,Qi Guo,Miaomiao Zhang
Photothermal therapy (PTT) faces critical limitations due to tumor hypoxia, intrinsic resistance, and metastasis. To address these challenges, we developed a trimodal nanoplatform (R-R/PB@PPy NEs) by synergizing Prussian blue (PB)/polypyrrole (PPy) nanozymes, tumor suppressor reactivation, and immune modulation. Through Fe3+ -mediated one-step oxidative polymerization, PB and PPy were integrated into a hybrid nanozyme and further functionalized with rosiglitazone (PPAR-γ agonist) and rutin (tumor-targeting ligand). The R-R/PB@PPy NEs achieved a photothermal conversion efficiency of 31.6% and catalase/superoxide dismutase-like enzymatic activity, persistently alleviating hypoxia via oxygen generation. Simultaneously, AKT/mTOR-mediated PTEN upregulation suppressed tumor proliferation and metastasis. Rutin-mediated tumor targeting enhanced drug accumulation at tumor sites, which synergistically amplified immunogenic cell death induction, promoting dendritic cell maturation and cytotoxic T-cell infiltration. In vivo, this platform completely inhibited 4T1 tumor growth, eradicated lung metastasis, and prevented recurrence (0% at 56 days) with an 80% long-term survival rate and no systemic toxicity. By unifying catalytic nanozyme design, PTEN-driven sensitization, and immune activation, this study establishes an interdisciplinary strategy to overcome resistance in PTT, offering a translatable approach for precision cancer therapy through tumor microenvironment modulation.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Xinru Wang,Jie Zhang,Jinyu Shan,Dong Yang,Jie Yang,Guangming Tian,Yunzhi Dang,Jianhua Ma
Smart antibacterial materials are gaining attention for their potential in controlled drug release and efficient treatment. This study constructed a composite hydrogel based on oxidized bacterial cellulose (OBC) and quaternary ammonium chitosan (QAC). This hydrogel was loaded with the natural antibacterial drug berberine (Ber) and utilized the abundant functional groups (such as amino and carboxyl groups) on OBC and QAC to achieve pH responsiveness, achieving on-demand drug release in the alkaline microenvironment of simulated chronic wounds. By further in situ polymerization of polypyrrole (PPy) on the hydrogel surface, the composite hydrogel (OBC/QAC/Ber/PPy) was endowed with excellent photothermal and electrothermal conversion properties. Systematic characterization showed that the OBC/QAC/Ber/PPY hydrogel had a high compressive strength of 135.6 kPa, self-healing ability, excellent biocompatibility, and significant antimicrobial activity. Notably, the introduction of the PPy layer also synergistically enhanced the inherent antibacterial properties of QAC and Ber through thermal effects; under photothermal stimulation, inhibition zones against E. coli and S. aureus reached 8.0 and 6.2 mm, respectively. Mouse wound models showed that the OBC/QAC/Ber/PPy composite hydrogel significantly accelerated wound healing, with a 27.03% improvement in the wound healing rate after 15 days compared to pure BC films. In summary, the OBC/QAC/Ber/PPy composite hydrogel, which integrates pH responsiveness, photoelectric thermal synergistic therapy, and multiple antibacterial mechanisms, provides a promising strategy for developing next-generation smart wound dressings and addressing bacterial resistance challenges.
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高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2026
·Vol. 49
·期 1
·34
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IF 2.1
Zhang Mengmeng,Ren Honghe,Yu Hongchao,He Zhaojun
Fe-doped polypyrrole hollow microspheres were prepared by in situ chemical oxidative polymerization. By ultrasonically dispersing the pyrrole monomer on the surface of a hollow ferroferric oxide hard template, the pyrrole monomer was uniformly distributed on the template surface and within the cavity, enabling simultaneous polymerization of pyrrole and Fe doping. The resulting Fe-doped polypyrrole hollow microspheres exhibited a regular spherical morphology with sizes in the micron range and a specific surface area of 116.7 m 2 /g. The adsorption characteristics of acid chrome blue K (AK) onto the iron-doped polypyrrole were systematically investigated, including the effects of pH, contact time, temperature, and initial dye concentration. The adsorption kinetics showed that equilibrium was reached within 50 min, and the experimental data were well described by the pseudo-second-order kinetic model. Thermodynamic analysis indicated that the adsorption of AK onto Fe-doped polypyrrole hollow microspheres is a spontaneous process. The Fe-doped polypyrrole exhibits advantages such as simple preparation, fast adsorption rate, and recyclability as an adsorbent. It offers an efficient, economical, and environmentally friendly approach, demonstrating strong potential for the treatment of high-concentration printing and dyeing wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Jiahui Tang,Xi Yang,Jiaojiao Li,Yulin Zou,Cong Chang,Dandan Gao,Jiyang Xie,Qian Zhao,Xu Zhang,Yongyun Mao
The integration of high energy density and robust mechanical flexibility in electrode materials remains a fundamental challenge for flexible energy storage devices. While manganese dioxide (MnO₂) offers high theoretical capacitance, its inherent rigidity and poor conductivity severely limit practical applications. Herein, we propose an innovative “rigid-flexible complementary” multi-level design strategy, constructing a multifunctional PVA-SA-PPy@MnO₂-PANI composite hydrogel. This architecture ingeniously integrates hollow-structured PPy@MnO₂ microspheres for enhanced active sites and electrolyte permeability, a dual-conductive-polymer network (PPy and PANI) for efficient electron transport, and a dynamic hydrogen-bonding matrix (PVA and SA) that confers remarkable mechanical strength (megapascal-level), exceptional flexibility, and intrinsic self-healing capability. The resulting hydrogel serves not only as a high-performance electrode for all-gel-state flexible supercapacitors, delivering an outstanding areal energy density of 10.4 mWh/cm 2 and excellent capacitance retention under extreme bending, but also as an effective tribo-positive layer in single-electrode triboelectric nanogenerators (TENGs), enabling stable energy harvesting. This work demonstrates a breakthrough material platform that successfully unifies high energy density, superior mechanical properties, self-healing, and dual energy storage/harvesting functionalities, paving the way for next-generation flexible and wearable electronics.
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Journal of the American Chemical Society
·
2026
·
IF 15.6
Guolong Sun,Yijin Chen,Xiaoli Xia,Yiwen Wang,Jiejun Zeng,Jie Zhu,Lina Gao,Luming Peng,Linjun Wang,Xueqian Kong,Yizheng Jin
The surface hydrogen species of zinc oxide (ZnO) nanocrystals, including hydroxyl groups and water, play critical roles in determining their chemical reactivity, colloidal stability, and optoelectronic properties. However, direct structural identification of these surface species remains challenging due to their complex nature and surface disorder of the nanocrystals. Here, we present a comprehensive analysis of surface functionalities on sol–gel synthesized ZnO nanocrystals using advanced multinuclear and multidimensional solid-state nuclear magnetic resonance (NMR) spectroscopy, combined with density functional theory (DFT) theoretical calculations. By employing 1H, 7Li, 13C, 17O, and 31P NMR, alongside the use of deuterated precursors, 17O isotope labeling, probe molecules, defect analysis, and electron paramagnetic resonance (EPR) spectroscopy, we resolve and assign eight distinct hydrogen species, including acetate and lithium acetate ligands, chemisorbed and physisorbed water, terminal hydroxyls (OHT), tribridged hydroxyls (μ3-OH), and defect-associated hydroxyls. Furthermore, 1H–1H homonuclear correlation SSNMR experiments elucidate the crystal facet selectivity and spatial interactions of these surface hydrogen species. Our study establishes an in-depth understanding of the rich surface hydrogen landscape on ZnO nanocrystals and offers a framework for the rational design and functional tuning of ZnO-based nanomaterials.
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 3.6
Siyuan Pang,Zhihang Wang,Yang Zou,Li Zhang,Yonggang Lv
Liquid metal (LM) nanoparticles have been widely used in photothermal therapy (PTT), but they are susceptible to oxidative inactivation and have poor targeting ability. Platelets (PLT) have many abundant membrane proteins on their surface that can be used to modify LM nanoparticles. Here, a gallium (Ga)-based LM-based nanoparticle delivery system was developed. The conducting polymer polypyrrole (PPy) was first grown in situ on the surface of LM nanoparticles by polymerization (named as LM@PPy). The oxidation resistance and photothermal stability of LM were improved. Subsequently, PLT membrane (PM) was extracted and coated on the surface of LM@PPy to prepare LM@PPy/PM. The antitumor effect of LM@PPy/PM was investigated through in vitro and in vivo experiments. It was demonstrated that the LM@PPy had better photothermal stability and their photothermal conversion efficiency reached 55 ± 2 %, which was higher than that of unmodified LM nanoparticles (31 ± 2 %). Most of the membrane proteins from PLT were retained on the prepared LM@PPy/PM. The PM coating effectively enhanced the tumor-targeting ability of the nanoparticles, leading to better tumor accumulation and antitumor effects in in vitro and in vivo . The findings showed that this nanoparticle delivery system provided a new technological solution to improve the antitumor ability of LM nanoparticles.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Chunyuan Jiang,Xinrui Zhang,Haizhen Ji,Jie Zhang,Xingjian Li,Shoufang Xu,Faqiang Li,Yinwen Li
The application of flame-retardant coatings represents a straightforward and effective strategy for mitigating the fire risk of wood. However, conventional halogen-based coatings only provide passive protection, with their high environmental toxicity further limiting safe application. To integrate flame retardancy and early fire warning, this study proposed a halogen-free “polyphenol-mediated” strategy. First, a nitrogen‑phosphorus synergistic structural matrix was prepared from biomimetic shell-like tannic acid; nickel and polypyrrole were then introduced to obtain the flame retardant TPPNy with conductive capability. TPPNy was blended with a self-made waterborne polyacrylate (WPA) to form a compatible organic-inorganic hybrid coating (TPSA), which is designed to enhance the adhesion between the flame retardant and wood substrates as well as improve the coating toughness. During combustion, TPPNy releases flame-retardant gases and forms a dense, low-intumescence char, which not only provides a barrier effect but also forms a conductive carbon framework. Among them, polypyrrole can release inert gas while jointly optimizing the conductive network structure together with nickel. Since Ni 2+ is easily oxidized to NiO at high temperatures, it can act as an inorganic conductive filler in the conductive network structure, reduce conductive breakpoints, and synergistically achieve flame retardancy and fire warning performance. The optimal coating TPSA 4 (containing 4 wt% TPPNy) exhibits a LOI of 32%, reaches the UL-94 V-0 rating, reduces the peak heat release rate by more than 75%, triggers early warning within 10 s under 6 V, and maintains stable performance after being placed under constant temperature and humidity conditions for 72 h. This eco-friendly coating provides an integrated flame-retardant and early-warning solution for wood fire safety.
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Nano Materials Science
·
2026
·
IF 17.9
Yingying Wang,Shangmin Si,Taipeng Jiang,Sheng Chen,Jingjing He,Jianyong Tang,Jian Wu,Weijie Wei,Lingling Zeng,Jin Li,Zhuwei Gao
Frequent oil spills pose severe environmental and ecological threats, necessitating the development of materials capable of effective all-weather remediation of high-viscosity crude oil. In this study, a self-assembly strategy was employed to integrate covalent organic framework (COF) and polypyrrole (PPy) on a flexible cotton fabric (CF). Subsequent hydrophobic modification with polydimethylsiloxane (PDMS) produced a multifunctional composite membrane (PDMS@PPy@COF@CF) that integrated photothermal conversion, electrothermal response, and superhydrophobicity. The membrane exhibited excellent superhydrophobicity (WCA = 153.5°), superior oil-water separation efficiency (≥98.5%), and a high separation flux (≥24 010.4 L m – 2 h –1 ). Notably, the construction of micro/nanostructures via π-π stacking and hydrogen bonding between PPy and COF layers endowed the material with outstanding photothermal and electrothermal conversion performances. Specifically, the surface temperature rapidly increased to 73.8 °C within 180 s under 1.0 kW m – 2 irradiation and attained 145.9 °C at 10 V. Synergistic utilization of photothermal (0.5 kW m – 2 ) and electrothermal (4 V) effects enabled rapid crude oil adsorption within merely 45 s. Furthermore, the composite membrane maintained stable conductivity and superhydrophobicity under mechanical strain, ensuring its reliability and durability for practical applications. In summary, the multifunctional PDMS@PPy@COF@CF membrane enables energy-efficient all-weather cleanup of high-viscosity crude oil spills with practical oil recovery potential.
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