Science China-Materials
·
2025
·
IF 7.4
Fan Yu,Fang Jiangyu,Wang Ruoqi,Liu Xiaoyun,Zhuang Qixin,Zuo Peiyuan
The development of multifunctional electronic information materials that combine electromagnetic interference (EMI) shielding and infrared (IR) thermal camouflage is crucial for the smooth and safe operation of electronic devices. However, it is challenging for traditional shielding materials to simultaneously meet these high demands. Here, based on the strategy of interfacial bonding and compositional synergy, we successfully prepared a multilayer composite film via layer-by-layer vacuum filtration combined with a hot-pressing process using modified aramid nanofibers and MXene nanosheets as substrates. The film features aramid nanofibers-polypyrrole (ANF-PPy) as the matrix and Ag-MXene as the functional filler, and its unique multilayer structure enables it to generate multiple losses during electromagnetic wave transmission. In addition, the in-situ grown Ag nanoparticles effectively extend the MXene layer spacing and significantly enhance electromagnetic wave scattering efficiency. The film with a thickness of only 33 µm exhibits excellent EMI shielding performance (average EMI SE of 66.75 dB and SSE/t of 38432.54 dB cm 2 g −1 ). The tight integration of the multilayer structures also endows their high IR reflectivity. Accordingly, this research lays the foundation for the creation of multifunctional protective materials that have great potential for both military and civilian purposes.
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高影响因子
SURFACE REVIEW AND LETTERS
·
2021
·
IF 1.152
HENGXIN REN,YUSHAN QIN,YUGUANG LV
A new type of poly pyrrole/graphene oxide/bismuth vanadate (PPy/GO/BiVO 4 ) ternary nanocomposite with excellent visible light-driven photocatalytic degradation performance was prepared by the traditional hydrothermal method. The photocatalyst samples were characterized and analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). Under visible light irradiation, the photocatalytic activity of the samples in the degradation of Rhodamine B (RhB), which was used to simulate organic dye pollutants in the real natural environment, was detected. The experimental results demonstrated that the photocatalytic degradation performance of PPy/GO/BiVO 4 was reinforced after loading GO and PPy. Among all the photocatalyst samples with different PPy content, the PPy/GO/BiVO 4 nanocomposite containing 5% PPy showed the highest photocatalytic activity. The stability test suggested that the nanocomposite remained stable even after four cycles of photocatalytic degradation of RhB. As a novel type of visible light-driven photocatalyst, PPy/GO/BiVO 4 can be utilized to degrade pollutants in waste water.
研究领域:
材料科学
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环境化学
·
纳米技术
·
光催化
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Ye Wang,Zhiguo Nie,Xinyi Li,Rui Wang,Yang Zhao,Huan Wang
Driven by the urgent requirement to monitor the trace amount of heavy metal ions, a novel electrochemical sensing platform is constructed by surface modification of magnetic NiFe2O4 nanoparticles with polypyrrole (PPy). This NiFe2O4/PPy nanocomposite has a unique three-dimensional network architecture. Under the optimized experimental conditions, the fabricated sensor exhibits enhanced sensing performance for selective recognition of trace Pb2+ in the range of 0.1–2.1 μM by square wave anodic stripping voltammetry. The sensitivity of a NiFe2O4/PPy-decorated glassy carbon electrode (GCE) toward Pb2+ is verified to be superior to that of both bare GCE and NiFe2O4-decorated GCE, and an extremely low detection limit of 3.9 nM (S/N = 3) can be achieved. The accurate detection of Pb2+ is also challenged by various aqueous media and satisfactory recoveries varied from 98–107%, endowing it with great prospects in the analysis of real water samples. Moreover, the interferences from coexisting ions such as Cd2+, Fe3+, Zn2+, Ni2+, Cu2+, and Na+ can be ignored to some extent. The present study not only provides a new candidate for the efficient detection of Pb2+ but also sheds light on exploring advanced electrode materials to rationally design sensing interfaces.
研究领域:
材料科学
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环境科学
·
分析化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhuannian Liu,Benlong Wei,Kai Liu,Liping Wang
Molybdenum disulfide (MoS 2 ), as an appealing Faradaic material for efficient capacitive deionization (CDI), is limited by unsatisfactory electrical conductivity, inferior removal rate, and restacking. Herein, we develop a CNT/PPy/MoS 2 ternary composite using a robust 3D conductive interconnected structure CNT/PPy, constructed from multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) doped with dodecyl benzene sulfonate (DBS - ), as the growing substrate to mitigate the aggregation of MoS 2 nanoflakes. In this design, CNT/PPy ameliorates the wettability of the composite, provides convenient movement pathways, a fast charge transport rate, and facilitates ions diffusion process. Moreover, reinforced dispersibility and enlarged interlayer spacing of MoS 2 nanoflakes supply sufficient embedded sites for ion uptake and rapid transfer. Meanwhile, tight chemical coupling of Mo-N-C bonds can maintain the structural integrity of the composite electrode. Particularly, the symmetrical electrode configuration was established to address the kinetical unbalance of HCDI system. Consequently, the CNT/PPy/MoS 2 displays a large specific capacitance of 160.83 F g −1 at 5 mV s −1 , which is nearly 4.33 times that of MoS 2 (37.17 F g −1 ). The optimized CNT/PPy/MoS 2 cell achieves a maximum desalination capacity of 24.8 mg g −1 , ultra-high deionization rate of 5.24 mg g −1 min −1 , and superior capacity retention rate of 92.7% over 25 cycles. In addition, Na + ions were captured by the joint action of cation-exchange of DBS - -doped PPy, electrostatic adsorption of CNTs, and intercalation reaction of MoS 2 . The proposed composite structural design and electrode configuration should be a potential avenue to realize highly efficient deionization.
研究领域:
材料科学
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环境科学
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电化学
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高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 18
·4092-4104
·
IF 5.773
Zhi Zhu,Yang Yu,Hai Huang,Xin Yao,Hongjun Dong,Zhi Liu,Yongsheng Yan,Chunxiang Li,Pengwei Huo
A unique Ppy@CdS/ZnFe2O4 nanoreactor is fabricated via the microwave-hydrothermal method and surface-imprinting technique, which effectively enhances the recyclability, stability, and selectivity for recognition and degradation of tetracycline under visible-light irradiation. The as-prepared functional nanoreactor enables photocatalytic reactions with little loss of activity during the recycling process. In addition, the capture experiments and ESR exploration show that h+ and ˙OH play the major roles in this photocatalytic reaction. Therefore, this study not only puts forward a novel design concept that develops the potential application value of CdS, but also provides a new approach for inhibiting its secondary pollution. Moreover, this nanoreactor has huge potential for the continuous and selective decomposition of specific pollutant molecules according to practical requirements.
研究领域:
环境科学
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材料科学
·
化学工程
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chunqing Yang,Dongzhi Zhang,Dongyue Wang,Huixin Luan,Xiaoya Chen,Weiyu Yan
Flexible strain sensors have significant progress in the fields of human–computer interaction, medical monitoring, and handwriting recognition, but they also face many challenges such as the capture of weak signals, comprehensive acquisition of the information, and accurate recognition. Flexible strain sensors can sense externally applied deformations, accurately measure human motion and physiological signals, and record signal characteristics of handwritten text. Herein, we prepare a sandwich-structured flexible strain sensor based on an MXene/polypyrrole/hydroxyethyl cellulose (MXene/PPy/HEC) conductive material and a PDMS flexible substrate. The sensor features a wide linear strain detection range (0–94%), high sensitivity (gauge factor 357.5), reliable repeatability (>1300 cycles), ultrafast response–recovery time (300 ms), and other excellent sensing properties. The MXene/PPy/HEC sensor can detect human physiological activities, exhibiting excellent performance in measuring external strain changes and real-time motion detection. In addition, the signals of English words, Arabic numerals, and Chinese characters handwritten by volunteers measured by the MXene/PPy/HEC sensor have unique characteristics. Through machine learning technology, different handwritten characters are successfully identified, and the recognition accuracy is higher than 96%. The results show that the MXene/PPy/HEC sensor has a significant impact in the fields of human motion detection, medical and health monitoring, and handwriting recognition.
研究领域:
材料科学
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生物医学工程
·
人工智能
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Shengzhao Li,Shen Yuan,Qianzuo Liu,Ju Bai,Lei Fu,Shuang Xia,Yuanyuan Bai,Ting Zhang,Tie Li
Photothermal liquid crystal elastomers (LCEs)-based soft actuators have been received widely attention for their precise and untethered controlling behaviors. However, it remains a vital issue that needs to be overcome, that is, for the mismatch of mechanical moduli, the interface instability is prone to occur between inorganic photothermal additives and LCEs matrix, resulting in poor mechanical strength and actuation performance. Hence, in this study, a photothermal soft actuator was prepared via integrating a Polyvinyl alcohol (PVA)-coated photothermal Polypyrrole (PVA@PPy) additive and a LCEs substrate. Here, the introduction of PVA coating can create a strong and efficient hydrogen-bond interaction between the additive and the substrate, which will construct the uniform photothermal and mechanical reinforcement network, achieving the optimal mechanical performance of 47.1 MPa and actuation capacity of maximum strain of 46.5% and speed of 4.15 s −1 when the content of PVA@ PPy is 2.0 wt%. In addition, the influence of the size effect and the chemical interaction was also clearly clarified, showing that the order parameter decreases by 39% as the intermolecular distance of the liquid crystals increases by 0.12 Å during actuation. Furthermore, this soft actuator can realize four kinds of controlled motions just by adjusting the size and position of the IR light shone, achieving the largest out-of-plane and in-plane lateral bending angles of about 105 o and 60 o , respectively. Based on this, a soft robot was designed to finish the continuous behaviors, and this actuator was dexterously employed to imitate the locomotion behaviors of human muscle and phototaxis plants/animals, which is also benefitted from its excellent photothermal deformation effect, underscoring its considerable promise in the realm of adaptive bionic systems. Download: Download high-res image (144KB) Download: Download full-size image
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Cuicui Wang,Haoyu Li,Xin Yuan,Anqi Cai,Shuxian Dong,Zhizun Yue,Hongxia Ren,Chuanli Zhang,Hairong Yin,Yuanting Wu
To address the limited functionality of pure Hydroxyapatite (HA), cerium-doped hydroxyapatite (Ce-HA) with different Ce contents was synthesized by a hydrothermal method, and Ce-HA/PPy composites were further prepared by in situ polymerization of pyrrole. The crystal structure, micromorphology, and surface chemical properties of the materials were analyzed. Their photothermal performance, in vitro ion release behavior, and antibacterial properties were systematically studied. Ce was introduced into the HA lattice in mixed valence states (Ce 3+ /Ce 4+ ), and PPy formed a continuous surface-associated coating on Ce-HA, yielding a stable composite structure. The Ce-HA/PPy composite containing 1.0 mol% Ce exhibited the most favorable photothermal properties. This optimal performance was demonstrated by a photothermal conversion efficiency of 37.6% and good stability when irradiated with an 808 nm laser at 2 W/cm 2 The composite material exhibited antibacterial rates of up to 95.26% and 93.59% toward Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), respectively, under laser irradiation, and its antibacterial mechanism stems from the synergistic effect between the high photothermal conversion efficiency of PPy and Ce ions. The release amount of Ce 3+ /Ce 4+ ions from the composite material is within the physiological safety range. The Ce-HA/PPy composite developed in this study exhibits promising photothermal antibacterial performance and potential for biomedical photothermal antibacterial applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Qi Zeng,Ri Wang,Zihao Li,Ju Lin,Liang Guo,Yi Zhang,Zhengchun Peng
The emerging two-dimensional material, MXene, has attracted widespread interest in bioelectronic interfaces due to its outstanding optical, electrical, and chemical properties. However, current in situ fabrication strategies have not fully achieved robust MXene-based bioelectrodes, significantly limiting their functionalities and applications. Here, we present an electropolymerization and codeposition approach to combine the negatively charged MXene nanosheets, positively charged pyrrole (Py) radical cations, and polydopamine (PDA) adhesion elements. The as-prepared PPy-MXene/PDA composites as an bioelectrode exhibits a dramatically reduced interfacial impedance of ∼99% in the low-frequency region, a cathodic charge storage capacity (CSCc) up to 195 mC cm–2, and record-high charge injection capacity (CIC) of 15 mC cm–2. No significant delamination or electrochemical loss is observed even after being subject to continuous electrostimulation, long-term immersion, and high-frequency mechanical stimulation in phosphate-buffered saline (PBS), showing robust chronic stability. Moreover, the bioelectrode demonstrates a high, rapid, and stable photoelectrochemical response under near-infrared laser irradiation. The PPy-MXene/PDA-based photoelectroactive composites also exhibit excellent sensitivity to ascorbic acid, with a detection limit an order of magnitude lower than that of pure MXene. The mechanism underlying the enhanced performance of the PPy-MXene/PDA bioelectrode is systematically studied. This PPy-MXene/PDA-based photoelectroactive composites can be extended to numerous other applications.
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2016
·Vol. 35
·期 1
·35-40
·
IF 1.872
Xuan Shao,Tao Zhang,Zhaoyin Wen
Conventional binders in the cathode of Li-O 2 batteries are insulated, and integrate with the catalyst and the conducting carbon-support by physical mixing. This limits the transfer of electrons, degrades the cathode structure due to swelling, and finally leads to capacity fading and is deleterious to cycleability. In this study, we realized, for the first time, a one-step fabricated Co 3 O 4 -PPy cathode characterized by an in-situ formed conductive polymer binder. The functional binder, polypyrrole (PPy), was synthesized through electrical method, which acted as both the binder and supporting material in the Li-O 2 battery. Based on the conductive property of PPy, we obtained the Co 3 O 4 -PPy@Ni electrode via the process of CV electro-deposition. This method results in uniform distribution of Co 3 O 4 nanoparticles and can simplify the preparation process of the air cathodes. The Li-O 2 battery with the Co 3 O 4 -PPy@Ni cathode can discharge/charge for over 30 cycles under the limited specific capacity of 1000 mAh/g. The cycleability and impedance spectra of the Li-O 2 battery with the functional binder of PPy are superior to the battery with conventional binders.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Huikai Nan,Chunhui Zhang,Jianhong Liu,Chengxue Li,Chunxiu Liu,Shuolei Wang,Yubing Dong
Conventional flexible sensor substrates often suffer from critical limitations, such as non-biodegradability, restricted elastic strain ranges, and vulnerability of exposed conductive functional layers. The development of flexible wearable strain sensors with biodegradability, high ductility, broad elastic strain ranges, and reusability is imperative. Here, the epoxidized soybean oil (ESO)/tannic acid (TA)/triallyl isocyanurate (TAIC)/polybutylene adipate-co-terephthalate (PBAT) (ETTPBAT) fibers with significantly expanded elastic strain capability were synthesized via melt spinning and UV irradiation techniques, and the PBAT/polypyrrole (PPy)/ETTPBAT yarn strain sensors were fabricated via in-situ polymerization, twisting, and encapsulation processes. The effects of UV irradiation duration, polymerization time, and p -toluene sulfonic acid monohydrate ( p -TSA) dopant concentration on the mechanical properties, thermodynamic characteristics, sensing performance, and electrothermal conversion capabilities of the PBAT/PPy/ETTPBAT yarn strain sensors were systematically investigated. The prepared biodegradable PBAT-based strain sensors have stable sensing performance and larger elastic strain range, which is valuable for enhancing the performance and application of biodegradable polymer-based strain sensors.
研究领域:
材料科学
·
高分子科学
·
传感技术
·
柔性电子学
·
生物降解材料
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Muhammad Khan,Sai Chen,Zaheer Abbas,Xinchun Liu,Yinyong Sun,Hassan Murtza,Tong Zhang,Ke Zhang,Jiupeng Zhao,Yao Li
A novel core–shell composite material was synthesized, consisting of the metal organic framework (MOF) MIL-125 as the core and the conductive polymer polypyrrole (PPy) as the shell. The composite promotes electroresponsive performance and dispersion stability by combining the high surface area and porosity of MIL-125 with the conductivity of PPy. Structural and chemical features were examined by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), while particle morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The structural change of the materials-based electrorheological (ER) fluids was observed with or without an applied electric field using optical microscopy (OM). Rheological properties, including shear stress, shear viscosity, on–off switching effect, and dielectric characteristics, were investigated by using a rotational rheometer at different electric field intensities. The volume fraction of composite 14.1% and applied electric field of 3 kV/mm, the ER fluid exhibited a dynamic yield stress of 630 Pa and ER efficiency of 3038 at 0.1 s–1 shear rate, demonstrating its promising potential for practical application.
研究领域:
材料科学
·
智能材料
·
流变学
·
纳米复合材料
·
电活性聚合物
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高影响因子
危险品化学品经营许可证（带存储）