APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Du Huang,Zhenya Lu,Xingyue Liu,Junning Gao,Zhiwu Chen,Xin Wang,Xiaoyi Fu
NiCo 2 O 4 nanoflowers with high specific surface area were prepared on nickel foam (NF) by hydrothermal method and used as frameworks for developing cathode and anode of flexible asymmetric supercapacitor. With the unique nanoflower-like NiCo 2 O 4 arrays as skeleton, the NiCo 2 O 4 /Au/MnO 2 cathode was prepared by gold-spraying and electrochemical deposition and the NiCo 2 S 4 /PPy anode was prepared by second-hydrothermal and electro-polymerization. The hierarchical structured electrodes offer sufficient redox sites and adequate channels for accelerating ion and electron transport between electrodes and electrolyte. Moreover, the NiCo 2 S 4 /PPy was first reported as the anode, and its cycling stability (capacitance retention of 86.04 % after 5000 cycles) and specific capacitance (1612.5F/g at 1 A/g). The assembled flexible all-solid-state asymmetric supercapacitor (NiCo 2 O 4 /Au/MnO 2 // NiCo 2 S 4 /PPy) displays a high energy density of 206.37 Wh kg −1 at a power density of 398.57 W kg −1 and an outstanding cyclability (capacitance retention of 83.41 % after 5000 cycles).
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
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Yan Hongsheng,Xiong Jie,Du Peijian,Wu Ermiao,Pan Tiandi,Li Ni
The construction of semiconductor heterojunctions is an effective way to enhance the photocatalytic activity. In this work, n–p heterojunction composed of ZnO nanorods and polypyrrole (PPy) nanospheres were loaded on polyacrylonitrile (PAN) nanofibers to fabricate ZnO/PPy/PAN nanofiber membranes (ZnO/PPy/PAN NFMs) via electrospinning, hydrothermal synthesis and chemical polymerization. The results showed that the photodegradation rate of ZnO/PPy/PAN NFM was about 4.8 times higher than that of ZnO/PAN NFM. Moreover, the membrane exhibited good cycling stability, which maintained the removal efficiency of rhodamine (RhB) at 79% after five cycles. The enhanced photocatalytic activity was mainly ascribed to the synergistic effect of PAN nanofibers adsorption and n–p heterojunctions catalysis, resulting in a narrow bandgap, an increase in the absorption of visible light and the separation efficiency of electron–hole. Meanwhile, the degradation mechanism of ZnO/PPy/PAN NFMs was proposed. This work provides a promising strategy to construct n–p heterojunction photocatalysts for removing organic pollutants in wastewater.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jingwen Chu,Dinghe Yan,Zhiyuan Qiao,Feng Xu,Yang Ye,Jialin Wei,Dawei Ji,Haolong Xue,Shiqiang Song,Changfa Xiao,Jingjing Yan,Chun Wang
Using a porous ultrafiltration membrane made of poly(terephthalamide) (PPTA) as the base membrane, and using poly (allylamine hydrochloride) (PAH) and poly (styrene sulfonate) (PSS) respectively as the polycation and polyanion, a PPTA/PEMs multilayer membrane was prepared via the layer-by-layer (LBL) assembly method. Subsequently, polypyrrole (PPy) as a conductive separation layer was in situ polymerized on the surface of the PPTA/PEMs multilayer membrane using pyrrole (Py) and ferric chloride (FeCl 3 ) as the reactant and activating initiator, respectively, through chemical vapor deposition (CVD). By directing the control of the number of PEMs charged layers and their charge properties, a PPTA/PEMs/PPy composite nanofiltration membrane with stable and controllable interlayer structure was prepared. Further, the surface microstructure, chemical composition, hydrophilicity, and surface charge of the PPTA base membrane and the PPTA/PEMs/PPy composite nanofiltration membrane were characterized using SEM, AFM, FTIR, water contact angle, and zeta potential measurements. The results showed that when the number of polyelectrolyte layers was three (PAH/PSS) 3 , the PPTA/PEMs/PPy composite nanofiltration membrane exhibited high desalination performance and good permeability under a transmembrane pressure of 0.8 MPa. Subsequently, its structural performance stability was investigated under high-temperature (20°C and 80°C), acidic (pH=2), and alkaline (pH=13) conditions. After 10 hours of testing, the permeability of the PPTA/PEMs/PPy composite nanofiltration membrane for a 5 g/L Na 2 SO 4 solution decreased slightly, but the rejection rate remained almost stable. Compared to the PPTA/PPy composite nanofiltration membrane from previous studies, the PPTA/PEMs/PPy composite nanofiltration membrane obtained in this study showed improved permeability and rejection rate in high-concentration saline wastewater, with good thermal stability and chemical corrosion resistance. This provides guidance for the application of nanofiltration membranes in the treatment of saline wastewater under harsh conditions.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Xiaoli Ji,Fan Chen,Jian Liu,Qianqian Ma,Zhihao Xu,Ruochen Qiao
In this paper, MWCNTs/Si 3 N 4 binary composites were synthesized using a chemical click method, establishing a foundation for the in situ polymerization of MWCNTs/Si 3 N 4 /PPy ternary composites. The morphology, electrical conductivity, and electromagnetic parameters of the composites were characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and infrared analysis. The wave-absorbing properties of the composites were assessed with a vector network analyzer. The impact of varying feeding ratios on the absorption properties of the composites was investigated. The results indicated that as the amount of PPy increased, the minimum reflection loss of the nano-hybrid materials initially decreased before subsequently increasing. When the feeding ratio of MWCNTs: Si 3 N 4 : PPy was set at 2:1:4 and the thickness of the absorption layer was 2.5 mm, the minimum reflection loss (RL min ) reached −40.14 dB, while the maximum absorption bandwidth (EAB max ) attained 6.88 GHz (d = 2.0 mm). Compared to MWCNTs/Si 3 N 4 binary materials, the ternary materials demonstrated enhanced electromagnetic absorption capabilities. The numerous heterogeneous interface formed by MWCNTs, Si 3 N 4 , and PPy facilitates charge accumulation, creating a structure similar to a capacitor that induces interface polarization and attenuates electromagnetic waves (EMWs) by aligning polar bonds or charges in response to an alternating electric field. Additionally, the MWCNTs/Si 3 N 4 binary nanohybrid materials exhibit a larger surface area following PPy coating, which further enhances impedance matching, extends the propagation distance of EMWs, and improves their dissipation. These research results are of great significance for the production of absorbent composite materials and provide new ideas for the design of absorbent materials.
研究领域:
材料科学
·
纳米技术
·
电磁学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Yixin Liu,Hongmin Ma,Yong Zhang,Xuehui Pang,Dawei Fan,Dan Wu,Qin Wei
In this work, a label-free photoelectrochemical (PEC) aptasensor was developed for adenosine detection based on CdS/PPy/g-C 3 N 4 nanocomposites . The CdS/g-C 3 N 4 heterojunction effectively prevented the photogenerated charges recombination of g-C 3 N 4 and self-photocorrosion processes of CdS, improving photo-to-current conversion efficiency. The introduced polypyrrole (PPy) nanoparticles could lead to a more effective separation of photogenerated charges, thus resulting in a further increasing of photocurrent . The CdS/PPy/g-C 3 N 4 was firstly employed as the photoactive materials for fabrication of aptasensor, and SH-aptamer was then adsorbed on the CdS/PPy/g-C 3 N 4 modified electrodes through S-Cd bond. With increasing of adenosine concentration, the photocurrent decreased as the formation of SH-aptamer-adenosine bioaffinity complexes. Under optimal conditions, the PEC aptasensor had a sensitive response to adenosine in a linear range of 0.3 nmol L −1 to 200 nmol L −1 with a detection limit of 0.1 nmol L −1 . Besides, the as-proposed aptasensor has also been applied in human serum samples analysis. The aptasensor exhibits high sensitivity and good stability, thus opening up a new promising PEC platform for some other small molecules analysis.
研究领域:
生物传感技术
·
纳米材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiayu Xie,Ying Zhang,Huajun Wang,Gang Li,Wenfeng Qin,Chuanxi Lin,Ronghui Guo
Ice formation seriously affect helicopter flight performance, and serious ice accumulation will greatly threaten helicopter travel safety. To avoid the complex measures for surface ice protection and achieve integration, in this work, an ice defense membrane that based on polypyrrole (PPy) modified Ti 3 C 2 T x (MXene) and polydimethylsiloxane (PDMS) encapsulation was proposed. The test results show that membrane integrate the hydrophobicity (Contact angle could reach to 140.1°), dual-drive thermal property (Temperature of membrane could arrive at 116℃ and 68.3℃ at 7 V voltage supply and 100 mW/cm 2 near-infrared radiation, respectively), and micro-strain sensibility (0.05 % tiny strain for membrane could be sensed). Membrane with multifunction and high-integration can be effectively used in ice management. Anti-icing, deicing and ice detection tests were carried out to confirm the efficiency in passive anti-icing, active deicing, and ice formation detection. Moreover, an intelligent ice defense system based on the membrane and hardware circuit has been designed. This work puts forward a membrane with multifunctional integration for ice defense, which could powerfully deal with the icing problem for the aviation field in the future.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
·
2020
·
IF 3.212
Han-Long Cheng,Hai-Ling Guo,An-Jian Xie,Yu-Hua Shen,Man-Zhou Zhu
At present, cancer has become a major disease threatening human health worldwide. Therefore, developing targeting guided multimode synergetic therapy has become one of the hot spots in current antitumor research and is also a great challenge. Herein, a new Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposite containing magnetic iron oxide (Fe 3 O 4 ) nanoparticles (NPs), lamellar structure of graphite-like carbon nitride (g-C 3 N 4 ) and polypyrrole (PPy) shell with the loaded anti-tumor drug doxorubicin hydrochloride (DOX) was designed and prepared. The monodisperse Fe 3 O 4 nanoparticles (NPs) with the diameter of 20 nm endowed the nanocomposite with the magnetic targeting ability, reducing damage to normal tissues. It is very interesting that the Fe 3 O 4 NPs also possessed photosensitizer function for photodynamic therapy (PDT). The g-C 3 N 4 sheets as the photocatalysis towards the degradation of water for generating O 2 could effectively improve the hypoxia of solid tumors and increase the efficiency of PDT. In addition, PPy has high light-to-heat conversion efficiency, so was chosen for the cancer photothermal therapy (PTT). Finally, an anticancer drug (DOX) was loaded on the nanocomposite because the presence of mesoporous structure. Thus, the prepared Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposites exhibit synergetic chemotherapy/PTT/enhanced PDT antitumor effect. This study provides an inspiration for combining targeting and multimodality to improve the anticancer efficiency.
研究领域:
肿瘤学
·
纳米医学
·
生物材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2015
·Vol. 32
·期 9
·886-892
·
IF 3.081
Junyu Lei,Xiaofeng Lu,Guangdi Nie,Ziqiao Jiang,Ce Wang
A facile one-pot synthetic route is reported to prepare algae-like molybdenum disulfide/polypyrrole (MoS 2 /PPy) nanocomposite through a redox reaction between ammonium tetrathiomolybdate and pyrrole monomer under a hydrothermal condition without any other templates. The as-prepared unique algae-like MoS 2 /PPy nanocomposites are composed of few layer MoS 2 nanosheets, which are covered with PPy. Structural and morphological characterizations of this unique nanocomposite are investigated by Fourier-transform infrared spectra, Raman spectra, X-ray diffraction pattern, X-ray photoelectron spectra, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The as-prepared MoS 2 /PPy nanocomposites exhibit an excellent peroxidase-like catalytic activity toward the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) in acetate buffer solution (pH 4.0), which provides a facile strategy for the colorimetric detection of H 2 O 2 with a high sensitivity.
研究领域:
材料科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Jingxian He,Fang Liu,Chaohu Xiao,Hanxue Sun,Jiyan Li,Zhaoqi Zhu,Weidong Liang,An Li
Solar steam generation has been considered as one of the most promising strategies for production of fresh water using renewable solar energy. Herein, we prepared a polymer porous foam (HPSS) by a facile hydrothermal method. The HPSS presents a superhydrophilic wettability, an interpenetrating macroporous structure, and low thermal conductivity, which can well satisfy the criteria as an ideal candidate for photothermal materials. The HPSS/Fe3O4/PPy (polypyrrole) evaporator, of which a Fe3O4/PPy binary optical system served as a light absorption layer and HPSS was used as a porous substrate, was constructed through in situ growth of Fe3O4 particles followed by interfacial polymerization of PPy on the surface of HPSS. HPSS/Fe3O4/PPy shows an excellent light absorption capacity (92%) and photothermal conversion performance, with the solar energy conversion efficiency reaching up to 94.7% under 1 sun irradiation, which is much higher than that of HPSS/PPy (84.8%) composed of a unitary PPy light absorption layer. Interestingly, the presence of Fe3O4 particles could make directional migration in a magnetic field possible, thus facilitating its recovery as a self-floating solar generator in an open water area. Moreover, the HPSS/Fe3O4/PPy evaporator displays outstanding salt resistance properties and stability in various saline solutions, thus having great potential in practical desalination.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Min Wang,Jinghong Fang,Baoning Zhang,Yingchao He,Qiong Sun,Liyan Yu,Lifeng Dong
A dual-chamber photocatalytic fuel cell (PFC) was constructed using commercial P25 TiO 2 as the photoanode and a zeolitic imidazolate framework-67-polypyrrole (ZIF-67/PPy) composite as the cathode. The incorporation of ZIF-67 into PPy altered the cathodic oxygen reduction reaction from a 4-electron transfer route to a 2-electron pathway, with H 2 O 2 as the primary product. Under irradiation, the ZIF-67/PPy composite outperformed both bare ZIF-67 and PPy cathodes, achieving the fastest degradation of polyvinyl alcohol (PVA) in both chambers and the highest photoelectrical conversion performance in the PFC. However, the absence of Fe 3+ ions in the cathode chamber significantly hindered the degradation rate. Radical quenching tests confirmed the production of OH· radicals during the cathodic reaction, highlighting the role of the Fenton-like reaction between Fe ions and H 2 O 2 generated from oxygen reduction reactions, alongside other oxidative species such as O 2 −· and h + from the photocatalytic reaction. In summary, the novel ZIF-67/PPy composite cathode demonstrated excellent performance in wastewater purification, photoelectrical conversion, and long-term stability, making it a promising candidate for practical PFC applications.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Zhiguo Wu,Dan Liu,Ying Deng,Runyi Pang,Jinjin Wang,Tian Qin,Zongzheng Yang,Rongliang Qiu
In this research, a new material, chitosan/polypyrrole (CS/PPy), was synthesized and linked with the Cr(VI)-reducing bacterial strain YL3 to treat Cr(VI)-polluted soil. The findings demonstrated that the synergistic application of strain YL3 and CS/PPy achieved the greatest reduction (99.6 %). During the remediation process, CS/PPy served as a mass-storage and sustained release agent in the soil, which initially decreased the toxic effects of high concentrations of Cr(VI) on strain YL3, thereby enhancing the Cr(VI) reduction efficiency of strain YL3. These combined effects significantly mitigated Cr(VI) stress in the soil and restored enzyme activities . Furthermore, wheat growth in the treated soil also significantly improved. High-throughput sequencing of the microorganisms in the treated soil revealed that CS/PPy was not only effective at removing Cr(VI) but also at preserving the original microbial diversity of the soil. This suggests that the combined treatment using strain YL3 and CS/PPy could rehabilitate Cr(VI)-contaminated soil, positioning CS/PPy as a promising composite material for future bioremediation efforts in Cr(VI)-contaminated soils.
研究领域:
环境科学
·
生物技术
·
土壤学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Zhi Zhu,Xu Tang,Changchang Ma,Minshan Song,Nailing Gao,Youshan Wang,Pengwei Huo,Ziyang Lu,Yongsheng Yan
The ternary conductive Ppy@Ag/g-C 3 N 4 composite photocatalysts was successfully synthesized by polymerization process and surface polymerization technique. And the as-prepared Ppy@Ag/g-C 3 N 4 sample exhibited the higher photocatalytic activity for various pollutant (MO, DM, TC, CIP, GFLX and EH) remove than that of pure g-C 3 N 4 and Ag/g-C 3 N 4 under visible light irradiation. It mainly originated from the Ag nanoparticles anchored between g-C 3 N 4 and Ppy acted as electron transfer mediator that facilitated the charge carrier separation and then expending the lifetime of the carriers. Meanwhile, the obtained Ppy@Ag/g-C 3 N 4 sample also showed a relatively good recycling stability which was the crucial factor for photocatalyst practical application. This work provided a new facile strategy for improving photo-degradation activity of g-C 3 N 4 photocatalyst.
研究领域:
环境科学
·
材料科学
·
化学
✓ 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）