NANOTECHNOLOGY
·
2021
·Vol. 32
·期 44
·445402
·
IF 3.874
Shang Wu,Qiaoliang Feng,Sheng Zhou,Huanlei Zhao,Xin Xu,Qiong Su,Yanbin Wang,Yuzhi Sun,Quanlu Yang
Recently, prussian blue analogues (PBAs), as the most classical class of metal-organic frameworks, have been widely studied by scientists. Nevertheless, the inferior conductivity of PBAs restricts the application in supercapacitors. In this work, nickel cobalt hexacyanoferrate (Ni2CoHCF) had been produced via a simple co-precipitation approach and coated with polypyrrole on its surface. The conductivity of PBAs was improved by the polypyrrole coating. The Ni2CoHCF@PPy-400 microspheres were demonstrated to the outstanding specific capacity of 82 mAh g−1 at 1 A g−1. After 3000 cycles, the Ni2CoHCF@PPy-400 microspheres had a long cycle life and 86% specific capacity retention rate at 5 A g−1. Additionally, it was coupled with activated carbon to build high performance asymmetric supercapacitor (Ni2CoHCF@PPy-400//AC), which displayed a high energy density of 21.7 Wh kg−1 at the power density of 888 W kg−1 and good cycle stability after 5000 cycles (a capacity retention rate of 85.2%). What is more, the results reveal that the Ni2CoHCF@PPy-400 microspheresare a prospective candidate for exceptional energy storage devices.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23196-23211
·
IF 2.779
Xing Honglong,Chen Wenxiong,Liu Chuang,Ji Xiaoli,Yang Ping
In this study, flower sphere alumina was synthesized autonomously by hydrothermal and annealing processes. The in situ polymerization of polypyrrole on the surface of alumina at low temperatures based on the principle of component synergy has enabled the construction of a core–shell structure for Al 2 O 3 @ppy materials, resulting in excellent electromagnetic wave absorption properties. The effect of the addition of alumina and the morphology of the materials on the microwave absorption properties of Al 2 O 3 @ppy composites was also discussed. Various methods are used for the characterization of the material. The Al 2 O 3 @ppy composites were effective in matching thicknesses of 2.5 mm with a minimum reflection loss (RL) of − 65.8 dB at a frequency of 11.52 GHz and a maximum effective absorption bandwidth (EAB) of 5.6 GHz at a matched thickness of 2.0 mm. The results show that Al 2 O 3 @ppy composites can provide a reference for EMW absorber material research.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Kaixiang Ji,Peilin Wang,Yameng Li,Qiang Ma,Xingguang Su
Phthalate esters, particularly di(2-ethylhexyl) phthalate (DEHP), are widely used plasticizers found in various consumer products, posing significant environmental and health risks due to their endocrine-disrupting effects. In this study, a novel enzyme-free intra-capacitive biofuel cell self-powered sensor (ICBFC-SPS) was developed. The ICBFC-SPS integrated a ternary heterostructure-based capacitive anode and a cathode with a sensing interface into a single-chamber electrolytic cell. The ternary heterostructure based on Ti 3 C 2 T x MXene with ultra-small Au NPs and polypyrrole (PPy) NPs was prepared to provide the efficient glucose oxidation and robust electron production. Furthermore, the charge storage capacity was significantly enhanced through a synergistic combination of the double-layer capacitor mechanism of Ti 3 C 2 T x and the pseudocapacitive behavior of PPy. Additionally, the intercalation of PPy NPs expanded the interlayer spacing, promoting electrolyte ion diffusion and charge transfer. The ICBFC-SPS demonstrated exceptional sensitivity with a linear detection range from 0.05 to 100000 ng/L and a detection limit of 9.51 pg/L for the sensitive and selective detection of DEHP in complex environmental and biological samples. The ICBFC-SPS addresses the limitations of traditional methods by providing a self-powered, highly sensitive, and portable platform for rapid, on-site DEHP detection. This work underscores the potential of self-powered sensors as transformative tools for real-time environmental monitoring and public health protection.
研究领域:
环境科学
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生物医学工程
·
材料科学
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产品关联
DOI
PubMed
高影响因子
NANO
·
2026
·
IF 1.3
Congcong Bai,Hongying Hou,Wenting Mao,Runjie Wu
Poor conductivity of UiO-66 severely limited the electrochemical performances in the supercapacitors, which were alleviated and improved by combining with polypyrrole (PPy) with high conductivity and pseudocapacitive properties. Herein, a series of UiO-66@x%PPy ( x = 5 , 1 0 , 2 0 , 3 0 ) composites were prepared by solvothermal reaction followed by in-situ polymerization of pyrrole(PPy); furthermore, the influence of PPy’s loading on the structural properties was also systematically investigated. Desirably, the obtained composites maintained the “rigid-flexible” core-shell octahedral structure. Furthermore, the UiO-66@20%PPy composite exhibited the highest electrochemical performances with the specific capacitance of 204.1 F/g in a three-electrode system and 118.18 F/g in a two-electrode system at 1 A/g. Furthermore, the asymmetric two-electrode supercapacitor exhibited a high capacitance retention of 88.25% after 2000 cycles at 2 A/g. The synergistic effect between the continuous three-dimensional (3D) conductive network of PPy phase and the double-layer capacitance of porous UiO-66 framework may be responsible for the desirable results. Seemingly, an effective interfacial strategy was indeed beneficial for developing a high-performance UiO-66-based supercapacitor.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiaqi Chen,Jianzhang Gao,Yu Liu,Chao Peng,Tianyu Li,Yun Xue,Yongde Yan,Xiangbiao Yin,Yanghai Zheng,Shengrong Guo
A binder-free, self-supporting electrode was prepared via two-step electrodeposition. • Electrosorption capacity of PPy/Cu-Co-MHM@GF electrode reached 711.2 mg/g at pH 2. • PPy coating provides amino/imino groups and protects active sites from corrosion. • The synergistic effect among multiple active sites ensures excellent uranium removal. Electrochemical technology has attracted much attention for the removal of uranium(VI). However, it still faces the contradiction of balancing electrode stability and removal capacity under acidic conditions. In this work, a conductive polymer protection strategy was proposed to construct a novel in-situ polypyrrole (PPy) encapsulated Cu 0 /CuO-Co x O y multiphase hybrid material (MHM) on graphite felt (GF). The binder-free, self-supporting composite electrode denoted as PPy/Cu-Co-MHM@GF was fabricated via a facile electrodeposition method. This electrode achieved highly efficient uranium removal under acidic conditions. At pH = 2.0, as high as 98.2% of uranium could be effectively removed by PPy/Cu-Co-MHM@GF, and the electrosorption capacity could reach 711.2 mg/g. Moreover, the PPy/Cu-Co-MHM@GF electrode had excellent selective removal ability for uranium, and the K d value reached 43,173.01 mL/g. The experimental and characterization results indicated that the outstanding electrosorption capacity of PPy/Cu-Co-MHM@GF was not only due to the formation of electrical double layer, but also originated from the synergistic effect of various types of active sites (Co(OH) 2 , CoO, CuO and PPy). PPy acted as a physical barrier to reduce H + corrosion and provided abundant amino/imino groups to enhance UO 2 2+ coordination, ultimately realizing the synergistic removal of uranium. This study has opened up new horizons for the treatment of acidic radioactive wastewater. Download: Download high-res image (216KB) Download: Download full-size image
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DOI
高影响因子
Materials Today Nano
·
2025
·
IF 8.2
Yinchun Fang,Xianglu Zhao,Xuchen Tao
Photonic crystals (PCs) structural color coatings have been widely studied due to their advantages of environmental friendliness, resistance to fading and high color saturation. However, they still have problems such as single function and being easily affected by the external environment. In this research, fluorescent SiO 2 @polypyrrole@carbon quantum dots (SiO 2 @PPy@CQDs) microspheres were synthesized by incorporating CQDs into SiO 2 @PPy microspheres, which were self-assembled on the white cotton fabrics to form an amorphous photonic structure (APS). These APS exhibited angle-independent structural colors under natural light and blue fluorescence under UV light. The structural colored cotton fabrics obtained superhydrophobicity with a water contact angle (WCA) greater than 150° and self-cleaning function after treatment with polydimethylsiloxane (PDMS). The anti-counterfeiting structural colored fabrics with single response to UV light and dual responses to water/UV light based on SiO 2 @PPy@CQDs, SiO 2 @PPy and SiO 2 microspheres were prepared by using multi-layer alternating atomization deposition and PDMS hydrophobic treatment processes. This study provides a novel approach for developing multifunctional structural color coatings with self-cleaning and anti-counterfeiting based on fluorescent organic/inorganic hybrid microspheres.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xiaohu Ren,Ruidong He,Yun Tang,Zhen He,Yuchi Liu,Hongfeng Yin,Hudie Yuan,Wanxin Hu,Yalou Xin,Dongyun Gui,Huiqing Fan
The design of low-dimensional structures and the construction of heterogeneous interfaces are promising approaches for developing efficient microwave absorption materials (MAM), whose properties have the potential to improve the microwave absorption capacity of single-phase materials. Barium ferrite is an excellent MAM due to its excellent high-frequency magnetic properties and structural stability. However, its poor conductivity and weak polarization limit its applications. In this study, Mn-Zr doped M-type barium ferrite nanofibers were synthesized by electrospinning and high-temperature pyrolysis. A conductive polymer layer of polypyrrole was then polymerized in situ on the fiber surface to form a composite nanofibrous MAM with a one-dimensional core-shell heterostructure. At the microscopic level, a conductive polymer heterostructure interface was constructed on the surface of the one-dimensional ferrite fibers. The magnetoelectric coupling network at the interface induced interfacial polarization and increased the conduction loss, which improved the microwave absorption performance. The results show that the optimized sample, benefiting from multiple loss mechanisms and excellent impedance matching, achieved a minimum reflection loss of −44.20 dB at 8.7 GHz with a matching thickness of 4.0 mm. It also exhibited an effective absorption bandwidth of 3.5 GHz. Therefore, this study demonstrates that the synthesis and application of low-dimensional organic/inorganic magnetoelectric composites as heterogeneous microwave absorbers have broad prospects.
研究领域:
材料科学
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纳米技术
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电磁吸收
·
复合材料
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产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 8
·3823-3830
·
IF 2.394
Zhang Jun-Hong,Yue Haoguo,Ma Yueqiang,Han Xiao,Mei Jie,Zhao Jinsheng,Li Yan-Mei,Zhu Yan-Rong
In this work, the spherical NiO-NiMoO 4 composite was synthesized by solvothermal route followed by calcination, and then spherical NiO-NiMoO 4 /PPy composite was synthesized by in situ polymerization of pyrrole monomer. The NiO-NiMoO 4 and NiO-NiMoO 4 /PPy microspheres with a particle size of around 1–2 μm consist of nanorods and nanosheets. Hence, NiO-NiMoO 4 /PPy anode shows a higher delithiation and lithiation capacities than NiO-NiMoO 4 at each rate. At 0.2 A g −1 , NiO-NiMoO 4 only shows an initial delithiation capacity of ∼775 mAh g −1 , and the capacity only keeps 207 mAh g −1 after 160 cycles. Nonetheless, NiO/NiMoO 4 /PPy shows an initial delithiation capacity of ~ 884 mAh g −1 , and the capacity also maintains ~ 846 mAh g −1 even after 160 cycles. The corresponding capacity retention of NiO/NiMoO 4 /PPy and NiO/NiMoO 4 are 95.7% and 26.7%, respectively. The PPy modification is a direct and effective strategy to improve the reversible capacity and cycling performance of NiO-NiMoO 4 composite.
研究领域:
材料科学
·
储能
·
电化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Mufang Li,Haiying Li,Weibing Zhong,Qinghua Zhao,Dong Wang
The development of wearable electronics that can monitor human physiological information demands specially structured materials with excellent stretchability and electrical conductivity. In this study, a new stretchable conductive polypyrrole/polyurethane (PPy/PU) elastomer was designed and prepared by surface diffusion and in situ polymerization of PPy inside and on porous PU substrates. The structures allowed the formation of netlike microcracks under stretching. The netlike microcrack structures make possible the reversible changes in the electrical resistance of PPy/PU elastomers under stretching and releasing cycles. The variations in morphology and chemical structures, stretchability, and conductivity as well as the sensitivity of resistance change under stretching cycles were investigated. The mechanism of reversible conductivity of the PPy/PU elastomer was proposed. This property was then used to construct a waistband-like human breath detector. The results demonstrated its potential as a strain sensor for human health care applications by showing reversible resistance changes in the repeated stretching and contracting motion when human breathes in and out.
研究领域:
材料科学
·
可穿戴电子学
·
生物医学工程
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传感器与执行器
·
高分子化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Xiaoyan He,Xin Tian,Shuo Ma,Yuanyuan Lu,Jing Li,Yanling Liang,Zhiqiang Wang,Zhepin Tan,Xiaoquan Lu
Microbial fuel cells (MFCs) function as organic pollutant treatment systems with the unique advantage of recovering energy from waste. However, their energy recovery efficiency is often constrained when degrading toxic organic compounds. This study constructed a MFC system incorporating a TiO 2 -PPy/CF photoanode. TiO 2 with a nanoflower structure was fabricated, the loading of PPy particles on the partial surface of TiO 2 nanoflowers not only remarkably improved the MFC's power generation performance but also extended the photoresponse range of TiO 2 and efficiently suppressed the recombination of photogenerated electron-hole pairs.This electrode integrates biocatalytic and photocatalytic functions within a single structure, enabling both efficient electricity generation and phenol removal from wastewater. Under a specific solar light intensity, it achieved an impressive degradation efficiency of 77.30 % for 40 mg/L phenol within 5 h—6.1 times higher than that of the pure bacterial system (12.67 %)—thus highlighting its superior photocatalytic degradation capacity. Ultimately, with the assistance of biodegradation, the overall degradation efficiency reached 89.95 %, and the maximum power density achieved 5070 mW/m 3 . Furthermore, in contrast to the CF anode (4.32 %), the TiO 2 -PPy/CF photoanode for the first time achieved a significant increase in the abundance of Elusimicrobiota to 40.70 %, corresponding to a relative enhancement rate of ~842 % and demonstrating robust biofilm enrichment potential. Moreover, the underlying mechanism was elucidated: electron transfer is enhanced via multiple internal and external synergistic pathways, including pili and cytochromes. This work not only developed a high-performance integrated photoanode but also, critically, established a new paradigm for performance breakthroughs through the targeted modulation of functional microbial communities via electrode engineering.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 14
·17216-17223
·
IF 3.45
Yun-Peng Liu,Xiao-Han Qi,Le Li,Shi-Hang Zhang,Teng Bi
To obtain a battery-type ceramic electrode material for supercapacitors , we used a metal-organic framework (HKUST-1) as a template to prepare ceramic material Cu 9 S 8 @C. Firstly, we adopted the calcination–vulcanization method to synthesize Cu 9 S 8 @C. Then we deposited it onto a carbon fiber cloth and employed it. Moreover, polypyrrole PPy/Cu 9 S 8 @C-CC nanocomposite electrodes were prepared via electrochemical deposition . By means of high-temperature calcination and vulcanization , the copper atoms of HKUST-1 were successfully transformed into Cu 9 S 8 nanoparticles , and the organic ligand was carbonized into amorphous carbon in Cu 9 S 8 @C. The results showed that the PPy/Cu 9 S 8 @C-CC electrode presented a specific capacitance of 270.72F/g at a scan speed of 10 mV/s in a 1 M KCL aqueous solution. This value was much higher than that of Cu 9 S 8 @C-CC and Cu 9 S 8 -CC electrodes, as confirmed by the results of electrochemical test. At a scan rate of 10 mV/s, the capacitance retention rate for PPy/Cu 9 S 8 @C-CC after 3000 cycles was 80.36%, indicating its superior cycle characteristics. Moreover, PPy/Cu 9 S 8 @C-CC exhibited good frequency response. These results indicate that PPy/Cu 9 S 8 @C is an ideal electrode material for energy storage and conversion applications.
研究领域:
材料科学
·
能量存储
·
电化学
·
纳米复合材料
·
超级电容器
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingyin Qiu,Ying Men,Zhe Lin,Lipiao Bao,Ziyu Qin,Xing Lu
The growing demand for multifunctional sensors in wearable systems has prompted the need for materials that simultaneously support gas sensing and mechanical strain detection. However, current flexible sensing materials still suffer from issues such as response hysteresis, poor humidity resistance, and lack of antibacterial properties. Herein, we developed a ternary flexible composite by integrating defect-engineered ZIF-8, conductive polypyrrole (PPY), and bacterial cellulose (BC), which was further encapsulated with polydimethylsiloxane (PDMS) to form the Def-ZIF-8/PPY/BC@PDMS composite. The results demonstrated that with 2–3 layers of PDMS, the sensor achieved a fast and stable NO 2 response (9.3% at 10 ppm), with reliable recovery. Under 80% relative humidity, PDMS reduced humidity-induced signals from 34% to 10.3%, confirming markedly improved moisture resistance. The incorporation of a PDMS layer enabled enhanced stress sensing, reducing the response/recovery times to 0.4/0.3 s from 0.9/0.8 s in the uncoated structure. The sensor demonstrated high fidelity in recognizing complex biomechanical signals such as swallowing, walking, and finger articulation. Furthermore, antibacterial testing confirmed 42.18% and 64.69% inhibition against Escherichia coli and Staphylococcus aureus , respectively. This multifunctional composite simultaneously optimizes gas sensing, mechanical flexibility, humidity resistance, and antibacterial efficacy, paving the way for advanced materials in fully integrated wearable sensing technologies.
研究领域:
材料科学
·
传感器与传感技术
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可穿戴电子
·
气体传感
·
柔性电子学
✓ 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）