JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tauqeer Haidar Qamar,Sibt ul Hassan,Nouman Ahmed,Muhammad Javed Qasim,Sain Bux Jamali,Lei Ma,Shengxiang Huang,Lianwen Deng
The rational design of heterostructures with well-defined chemical composition and spatial configuration stands as a key approach in achieving exceptional performance in electromagnetic wave absorption. This innovative work investigated the electromagnetic wave absorption properties of flower-like CoS/Fe 3 O 4 @PPy composites synthesized by hydrothermal method and in situ polymerization. A comprehensive investigation was conducted into the phase composition, morphology, and absorption properties. Flower-like CoS/Fe 3 O 4 @PPy composite demonstrates remarkable microwave reflection loss of −58.4 dB and effective absorption bandwidth of 5.55 GHz in thickness of 3.1 mm. The superior performances are attributed to the synergistic interplay of interfacial polarization, dielectric loss, magnetic loss, and optimized impedance matching. Furthermore, sufficient decrease in radar cross-section value was observed for the optimal sample with reduction of 41.23 dBm². These results highlight the considerable potential of flower-like CoS/Fe 3 O 4 @PPy composites in addressing electromagnetic pollution and stealth applications.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Battery Energy
·
2024
·Vol. 3
·期 6
·20240035
·
IF 9
Yujia Xue,Jinghao Huo,Xin Wang,Yuzhen Zhao
Over the past decade, the extensive consumption of finite energy resources has caused severe environmental pollution. Meanwhile, the promotion of renewable energy sources is limited by their intermittent and regional nature. Thus, developing effective energy storage and conversion technologies and devices holds considerable importance. Zinc-ion hybrid supercapacitors (ZISCs) merge the beneficial aspects of both supercapacitors and batteries, rendering them an exceptionally promising energy storage method. As an important cathode material for ZISCs, the tunnel structure MnO 2 has poor conductivity and structural stability. Herein, the Zn x MnO 2 /PPy (ZMOP) electrode materials are prepared by hydrothermal method. Doping with Zn 2+ is used to enhance its structural stability, while adding polypyrrole to improve its conductivity. Therefore, the fabricated ZMOP cathode presents superb specific capacity (0.1 A g −1 , 156.4 mAh g −1 ) and remarkable cycle performance (82.6%, 5000 cycles, 0.2 A g −1 ). Furthermore, the assembled aqueous ZISCs with ZMOP cathode and PPy-derived porous carbon nanotube anode obtain a superb capacity of 109 F g −1 at 0.1 A g −1 . Meanwhile, at a power density of 867 W kg −1 , the corresponding energy density can achieve 20 Wh kg −1 . And over 5000 cycles at 0.2 A g −1 , the cycle performance of ZISCs maintains at 86.4%, which exhibits excellent cycle stability. This suggests that ZMOP nanowires are potential cathode materials for superior-performance aqueous ZISCs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyuan Song,Junjian Niu,Wenjun Yan,Xuan Li,Xiaogang Hao,Guoqing Guan,Zhongde Wang
The separation and capture of Br - ions from aqueous solutions is of great significance in view of their dual characteristics, that is, its economic value and its harmful effect on human body. In this study, BiOBr@PPy electroactive hybrid film with core-shell structure, which was fabricated by in-situ coating conductive PPy on BiOBr with ion storage space, was applied to selectively capture Br - ions using electronically switched ion exchange technology (ESIX). The capture capacity of BiOBr@PPy hybrid film reached 146.2 mg g −1 at 0.8 V oxidation voltage. While, the hybrid film had an excellent selectivity towards Br - ions in the aqueous solution with several competing anions. It was confirmed that selective Br - ion capture/release by the BiOBr@PPy hybrid film was achieved through the synergistic effect generated from sufficient Br - ions storage space of BiOBr, highly conductivity and ion screening function of PPy, and powerful driving forces jointly activated by the electrochemical redox reaction of BiOBr and PPy. In addition, the capacity retention efficiency and release rate of the hybrid film still remained above 80% after 10 cycles due to the strategy of in-situ coating of PPy. It is predicted that such a BiOBr@PPy hybrid film with synergistic effects may be a potential electroactive material for the separation and capture of Br - ions from aqueous solutions.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2022
·
IF 4
Yanhua Lei,Mengchao Ding,Haikun Wu,Di Yin,Yang Li,Bochen Jiang,Kai Sun,Yuliang Zhang,Hailiang Du
In this work, the layered Ti 3 C 2 T x MXene were coated with polypyrrole particles by an in-situ polymerization method, and their electromagnetic wave absorption performance were systematically studied. The MXene/PPy composites presented an excellent electromagnetic wave absorption performance, the strongest reflection loss can reach − 68 dB at 2.68 mm. Meanwhile, when the thickness is 2.26 mm, the effective absorption bandwidth can reach 6.56 GHz (from 11.44 to 18 GHz), covering the entire K u band (12–18 GHz). The multiple reflections at the heterogeneous interface, and the synergistic effect between the layered MXene and the conductive polypyrrole network made a combined effect on the optimized absorption. The MXene/PPy composites with a strong electromagnetic wave absorption, wide effective absorption bandwidth and corrosion resistance have a great value in aircraft and vessel fields.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Lili Luo,Xiaohong Wang,Siyu Yang,Juguo Dai,Dongxu Li,Long Xia,Cheng Chi,Andreu Cabot,Yiting Xu,Lizong Dai
While asymmetric supercapacitors (ASCs) have huge potential as efficient, durable, and cost-effective energy storage devices, they fail to meet expectations because of the unoptimized architecture and composition of their electrode materials. Herein, PPy/PANI@MoS2 (PPMS) ternary composites with a dual-channel structure are obtained by facile hydrothermal and in situ polymerization methods. These dual conductive channels synergistically improve the electrode’s electrical conductivity, facilitate ion diffusion, enlarge the interlayer distance, and increase the accessible surface area. Taking advantage of such a favorable architecture, PPMS composites exhibit outstanding electrochemical properties, including a huge specific capacitance (1171 F g–1 at 1 A g–1) and rate capability (861 F g–1 at 20 A g–1) in three-electrode systems. Based on charge storage mechanism analyses, we demonstrate that the kinetic behavior of PPMS electrodes is dominated by the surface capacitance (95.9% at 100 mV s–1). Besides, PPMS-based ASCs (PPMS//activated carbon) operate in a broad voltage window (1.8 V), delivering an ultrahigh energy density of 93.4 Wh kg–1 at a power density of 884.8 W kg–1. They also show a superior cycling stability of 90.4% and a remarkable Coulombic efficiency of 99.2% for 10,000 cycles. This work affords an inspiration for rational structural optimization of PANI-based electrode materials with great prospects in the development of next-generation high energy density ASCs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2016
·
IF 0
Zi-Fei Zhou,Fan Zhang,Jian-Guang Wang,Quan-Chi Chen,Wei-Zhi Yang,Ning He,Ying-Ying Jiang,Feng Chen,Jun-Jian Liu
Peripheral nerve injuries represent a great challenge for surgeons. The conductive neural scaffold has experienced increasing interest because of its good biocompatibility and similar electrical properties as compared to those of a normal nerve. Herein, nerve conduits made from poly(d,l-lactide)-co-poly(ethylene glycol) and polypyrrole (20%, 30%, and 50%) (PELA–PPY) were prepared by electrospinning, and used in regeneration of peripheral nerve defects. The results of an in vitro experiment indicated a high biocompatibility for the as-prepared materials, supporting the attachment and proliferation of a rat pheochromocytoma PC-12 cell. Furthermore, the PELA–PPY nerve conduit implanted in the sciatic nerve defects (10 mm) of the Spraguee–Dawley rats for 12 weeks showed similar results with the autograft, while it demonstrated a better outcome than the PELA nerve conduit in electrophysiological examination, sciatic function index, total amount of regenerated myelinated nerve fibers, axon diameter, myelin thickness, and several immunohistochemistry indices (S-100, laminin, neurofilament, bromodeoxyuridine, and glial fibrillary acidic portein). We supposed that the bioactivity is mainly generated by the PPY in composite nanofibers which could transmit self-originated electrical stimulation between cells. Due to the facile preparation and excellent in vivo performance, the PPY–PELA nerve conduit is promising for use as a bioengineered biomaterial for peripheral nerve regeneration.
研究领域:
生物医学工程
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神经科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
Polymers
·
2022
·Vol. 14
·期 5
·859
·
IF 4.967
Xiujuan Wang,Xiaoyu Gao,Yu Wang,Xin Niu,Tanyu Wang,Yuanjun Liu,Fangxi Qi,Yaming Jiang,Hao Liu
In recent years, the research of flexible sensors has become a hot topic in the field of wearable technology, attracting the attention of many researchers. However, it is still a difficult challenge to prepare low-cost and high-performance flexible sensors by a simple process. Three-dimensional spacer fabric (SF) are the ideal substrate for flexible pressure sensors due to its good compression resilience and high permeability (5747.7 mm/s, approximately 10 times that of cotton). In this paper, Thermoplastic polyurethane/Polypyrrole/Polydopamine/Space Fabric (TPU/PPy/PDA/SF) composite fabrics were prepared in a simple in-situ polymerization method by sequentially coating polydopamine (PDA) and Polypyrrole (PPy) on the surface of SF, followed by spin-coating of different polymers (thermoplastic polyurethane (TPU), polydimethylsiloxane (PDMS) and Ecoflex) on the PPy/PDA/SF surface. The results showed that the TPU/PPy/PDA/SF pressure sensors prepared by spin-coating TPU at 900 rpm at a concentration of 0.3 mol of pyrrole monomer (py) and a polymerization time of 60 min have optimum sensing performance, a wide working range (0–10 kPa), high sensitivity (97.28 kPa−1), fast response (60 ms), good cycling stability (>500 cycles), and real-time motion monitoring of different parts of the body (e.g., arms and knees). The TPU/PPy/PDA/SF piezoresistive sensor with high sensitivity on a highly permeable spacer fabric base developed in this paper has promising applications in the field of health monitoring.Keywords:space fabric;Polypyrrole (PPy);piezoresistive sensors;thermoplastic polyurethane (TPU) coating
研究领域:
材料科学
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柔性电子
·
健康监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 17
·13313-13322
·
IF 4.6
Hengxin Ren,Xinyu Sun,Tong Li,Zhixin Ren,Chaoyu Song,Yuguang Lv,Ying Wang
Herein, a new Z-scheme BiVO4/Cu2O/PPy heterostructure photocatalyst was developed with bismuth nitrate and ammonium vanadate as the precursors and sodium dodecyl benzyl sulfonate as the soft template. Through the spatial confinement effect of the sodium dodecyl benzyl sulfonate soft template, peanut-like BiVO4 and the BiVO4/Cu2O/PPy heterojunction were synthesized. The best performance was observed for BiVO4/Cu2O/PPy (5%), and its photodegradation rate was 6.57 times higher than that of pure BiVO4. The mechanism study showed that a light hole (h+), superoxide radical (·O2−), and hydroxyl radical (·OH) participated in the CO2 reduction process, which was different from the pure BiVO4 reaction system. Therefore, the proposed approach provides a new method for applying BiVO4/Cu2O/PPy photocatalysts and developing the same type of heterojunction photocatalyst, and they have effective practical application for environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yukun Yang,Xiaoyi Zhang,Xiaomin Wang,Xu Jing,Ligang Yu,Baoqing Bai,Tao Bo,Jinhua Zhang,Hailong Qian,Ying Gu
As an emerging porous material, hydrogen-bonded organic framework materials (HOFs) still pose application challenges. In this work, the designed type “I + II” heterojunction extracted hot electrons from HOFs using quantum dots (QDs) and polypyrrole (Ppy), improving the stability and photoelectrochemical performance of materials. In addition to serving as a potential well, electropolymerized Ppy was used as a recognition element for bisphenol A (BPA), and a novel self-powered molecularly imprinted photoelectrochemical (MIP–PEC) sensor was designed. The sensing platform showed a linear relationship from 1 × 10 −10 to 1 × 10 −7 mol∙L −1 and from 1 × 10 −7 to 1 mol∙L −1 with an acceptable detection limit of 4.2 × 10 −11 mol∙L −1 . This is the first application of HOFs in constructing MIP–PEC sensors and a new attempt to improve the stability of HOFs for the application of porous crystal materials in the sensing field.
研究领域:
分析化学
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材料科学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Shun Tang,Qian Lan,Jiyuan Liang,Shengrui Chen,Chang Liu,Jinxing Zhao,Qi Cheng,Yuan-Cheng Cao,Jiyan Liu
We report a facile method to synthesize polypyrrole-coated Fe 3 O 4 core-shell magnetic nanoparticles (Fe 3 O 4 @PPy). First, crude Fe 3 O 4 nanoparticles were synthesized by co-precipitation approach. PPy layers were generated and deposited on the surface of Fe 3 O 4 via in-situ electropolymerization and electrodeposition , to construct core-shell structure nanoparticles. TEM observations showed the Fe 3 O 4 nanoparticles changed from 15 nm to 120 nm in diameter after the PPy coating. The composition and morphology of Fe 3 O 4 @PPy nanoparticles were characterized by advanced spectroscopic and imaging techniques. The Fe 3 O 4 @PPy nanoparticles possess good dispersion property and acid stability in strong acid aqueous. The magnetic measurement at room temperature indicates that the Fe 3 O 4 @PPy nanoparticles exhibit superparamagnetic behavior, holding the saturation magnetization of 43.5 emu/g. All the results show great potentials of the Fe 3 O 4 @PPy nanoparticles in wide range of applications.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Meng Zhang,Yu Zhang,Yucong Chen,Xiaoru Tian,Lingzhi Liu,Yizhong Wang,Ruijie Guo,Hong Yan
MIL-88(Fe) was used as an oxidant and a hard template for the synthesis of polypyrrole (PPy) on its surface, and the formation of PPy made the surface of MIL-88(Fe) rougher as well as more voids formed in the interior. The increased specific surface area allowed more benzotriazole (BTA) (17.8 wt%) loaded on PPy/MIL-88 particles. BTA/PPy/MIL-88(Fe) was employed as a novel corrosion inhibitor to enhance the corrosion resistance of epoxy coating for carbon steel. BTA/PPy/MIL-88(Fe) filler improved the corrosion resistance of EP coating without/with artificial scratch by delaying the cathodic and anodic reactions in corrosive media. Both BTA and MIL-88(Fe) played the role of corrosion inhibitors, making EP coating possess active corrosion protection and pH-sensitive performance. Besides, BTA/PPy/MIL-88(Fe) enhanced the adhesion of EP coating by filling the pores inside.
研究领域:
材料科学
·
防腐蚀工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Jinming Ma,Huizhen Deng,Zhe Zhang,Lexin Zhang,Zhihui Qin,Yaru Zhang,Lili Gao,Tifeng Jiao
In this study, a series of Ag 3 PO 4 /PPy/PANI ternary composite catalysts were fabricated by adjusting the mixed solution of pyrrole and aniline with different volume ratios of 4:1, 3:2, 1:1, 2:3, and 1:4, and combining with the in-situ synthesis method. The synthesized Ag 3 PO 4 /PPy/PANI nanoparticles were examined by XRD , SEM, TEM and EDX , Raman spectroscopy . When the ratio of pyrrole and aniline is 1:1, the polymerized PPy/PANI acted as the supporting matrix to effectively immobilize and prevent the aggregation of Ag 3 PO 4 nanoparticles. The catalytic performances of the Ag 3 PO 4 /PPy/PANI composites were confirmed for reduction of 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP) in the presence of NaBH 4 at room temperature by UV–vis spectroscopy. Results showed that the catalytic reduction effect of the Ag 3 PO 4 /PPy/PANI (1:1) on 2-NA is obviously better than that on 4-NP, which followed the pseudo-first-order kinetic, and the corresponding rate constants are 0.0053 min −1 and 0.022 min −1 , respectively, indicating that it has potential application in wastewater treatment in industries.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）