Applied Materials Today
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2024
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IF 7.2
Xiaolong Cao,Kai Yan,Hua Chen,Qunna Xu,Yan Zong,Xiaodan Sun,Xiao Li
Smart fabrics show a huge advantage in the field of flexible wearable electronics because of their superior hygienic properties. Here, a flexible wearable fabric for underwater sensing with both electromagnetic wave absorption (EWA) and passive radiation heating properties is fabricated by integrating polypyrrole (PPy), ferroferric oxide (Fe 3 O 4 ) nanospheres, and hydrophobic polyurethane (PDMS-PUF) onto the surface of the fabric. The multi-layer integrated structure allows the fabric sensor to be superhydrophobic (water contact angle is 154.5°) without much impact on its air permeability. At the same time, the conductive PPy network confers the fabric sensors with a rapid response rate (245/327 ms), effectively enabling long-term monitoring, especially during underwater sports in which the real-time altitude of the wearer can be monitored. Moreover, owing to the strong near-infrared absorption and ideal photothermal conversion performance of PPy, the fabric sensor achieves the maximum solar absorption rate (95.1 %) in the visible light region, and shows favorable radiative heating characteristics (10 min temperature rise of 23.5°C). Remarkably, the fabric is endowed with multiple loss mechanisms on the presence of PPy and Fe 3 O 4 , achieving prominent EWA properties (-29.1 dB at 12.16 GHz). Therefore, the smart fabric is an ideal candidate for smart swimsuits and health protection.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Wang Lu,Dexing Jiang,Zhaofeng Wang,Xu Zhang,Qun Ding,Zhuo Zhang,Xiaowei Liu,Long Bai,Zhiguo Li,Yang Liu
The current solar interfacial evaporators have limited evaporation performance due to their single photothermal mechanism, insufficient light utilization, and improper heat management. Therefore, a novel approach involving polypyrrole (PPy) and Ag nanoparticles (AgNPs) modified wooden evaporator (AgPW) using an in-situ polymerization and growth method was proposed for efficient and sustainable freshwater purification. The composite photothermal effect of PPy and AgNPs led to a significantly enhanced light absorption capacity and superior photothermal conversion efficiency in a wide spectrum range, which coupled with the rapid water transport capacity conferred by the regular vertical channels and superior hydrophilicity of the delignified wood, resulted in remarkable evaporation performance through the coordinated regulation of thermal and water management. The optimized AgPW50 achieved an evaporation rate of up to 2.04 kg m −2 h −1 and an evaporation efficiency of 90.7 % under 1 kW m −2 irradiation. Importantly, this evaporator was highly salt resistant and long-term desalination stability, and can also be extended to the purification of various types of wastewaters while converting the released waste heat into stable electricity generation. The innovative Ag/PPy wooden evaporator integrates biomass resources with solar energy utilization, demonstrating an environmentally friendly, efficient and cost-effective strategy for seawater desalination and energy production, providing a new sustainable development pathway to solve the challenge of balancing water security and energy consumption.
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Advanced Energy Materials
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2025
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IF 26
Zongge Li,Wenjun Kang,Jingkai Lin,Rui Li,Konggang Qu,Suyuan Zeng,Lei Wang,Fanpeng Meng,Huayang Zhang,Haibo Li
The oxygen electrocatalytic activity of transition metal catalysts can be tuned by tailoring their microstructure to optimize electronic configuration. Here, a one-step Coordination-Selective Synthesis strategy is developed to integrate Co single-atom sites and Fe-based nanoparticles within the same matrix, enabling long-range electronic interactions that enhance Co-N 4 reactivity and improve oxygen reduction reaction performance. X-ray absorption spectroscopy confirmed that remote Fe-based nanoparticles modulate the electron distribution at Co-N 4 sites. Structural characterizations reveal that the optimal catalyst, Co 50% Fe 50% -NC, contains metallic Fe, Fe 3 O 4 , and Fe 4 N species. Electrochemical measurements show that it achieves onset and half-wave potentials of 0.984 and 0.927 V versus RHE, surpassing Co 100% -NC with only Co-N 4 sites. Additionally, it demonstrates efficient oxygen evolution reaction performance, achieving an overpotential of 298 mV at 20 mA cm −2 , comparable to RuO 2 . Density functional theory calculations reveal that Fe 4 N optimizes O-containing intermediate adsorption/desorption, lowering the theoretical overpotential. Zn-air batteries assembled with Co 50% Fe 50% -NC exhibited superior performance to Pt/C, highlighting its potential for bifunctional oxygen electrocatalysis. This study provides an approach for designing high-performance catalysts by utilizing synergistic interactions between atomic and nanoscale metal species.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Ziwei Zhao,Haoyun Dou,Xuanpan Xu,Rongjie Zhe,Qingye Zhao,Lingxia Zheng,Xinjun Bao,Ting Zhu,Hong-En Wang
Rational design of effective cathode host materials is an effective way to solve the problems of serious shuttle and slow conversion of polysulfides in lithium-sulfur batteries (LSBs). However, the redox reaction of sulfur differs from conventional “Rocking chair” type batteries and involves a cumbersome phase transition process, so a single-component catalyst cannot consistently and steadily enhance the reaction rate throughout the redox process. In this work, a hybrid composed of magnetopyrite Fe 1−x S catalyst-modified with N/S-doped porous carbon spheres (Fe 1−x S@NSC) is proposed as a novel sulfur host to synergistically promote the adsorption and redox catalysis conversion of polysulfides. In this hybrid, the NSC skeleton provides excellent electrical conductivity and abundant adsorption sites for the physical immobilization of polysulfides; the magnetopyrite Fe 1−x S nanoparticles promote the fast conversion reaction from Li 2 S 2 to Li 2 S, affording strong adsorption and catalytic conversion. The optimal LSB with Fe 1−x S@NSC manifests a high initial capacity of 971 mAh g −1 at 0.2 C (1 C = 1675 mAh g −1 ) and a retention rate of up to 75 % after 100 cycles. This work can provide a new approach for rationalizing the novel transition metal sulfide/porous carbon-based composite hosts with efficient lithium polysulfides (LiPSs) adsorption and catalytic conversion in high-performance lithium-sulfur batteries.
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高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Zhimin Li,Shuqi Gou,Ziyu Zhang,Yuying Yang,Shengwei Wang,Zhongai Hu,Xiaoquan Lu
An all-in-one flexible and all-solid-state matrix conductive hydrogel electrode with high capacitance has been effectively generated in this work. Using multi-dimensional materials collaborative construction, one-dimensional (1D) polypyrrole (PPy) nanofibers and two-dimensional (2D) reduced graphene oxide (RGO) nanolayers are incorporated into a three-dimensional (3D) polyvinyl alcohol (PVA) matrix. The cross network of PVA effectively prevents PPy aggregation and inhibits the collapse of the PPy skeleton, while is uniformly distributed and immobilized the RGO layer within the three-dimensional matrix of physically cross-linked PVA. This further enhances the overall material's mechanical properties and the conductivity. The confined growth PPy provides certain capacitive properties to the material. The hydrogen bonding and synergistic effect between each component make the PVA/RGO/PPy-0.5 hydrogel electrode to have an excellent area specific capacitance of 483.3 mF/cm 2 at 1 mA/cm 2 , along with outstanding flexibility and 91.2 % high cycle stability after 5000 charge-discharge cycles. By employing a layer-gelation strategy, an all-in-one flexible and all-solid-state supercapacitor set has a high energy density of 44.6 μWh/cm 2 and high cycling stability of 94.8 % after 10,000 charge-discharge cycles. Moreover, there is no significant capacitance loss when supercapacitor bent at various angles, demonstrating the great potential of the feasible flexible supercapacitors with high capacitance and deformability made possible through multi-dimensional materials collaborative construction.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Lin Zhao,Jianping Zhang,Guangri Jin,Zhong-Jie Jiang,Zhongqing Jiang
Economical oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) bifunctional catalysts with high activity aimed at replacing precious metal catalysts for rechargeable zinc-air batteries (ZABs) must be developed. In this study, a multiple hierarchical-structural material is developed using a facile dielectric barrier discharge (DBD) plasma surface treatment, solvothermal reaction, and high-temperature carbonization strategy. This strategy allows for the construction of nanosheets using nitrogen-doped carbon (NC) material-encapsulated ternary CoNiFe alloy nanoparticles (NPs) on a network of NC nanotubes (NCNTs), denoted as CoNiFe–NC@p–NCNTs. Precisely, the presence of abundant CoNiFe alloy NPs and the formation of M–N–C active sites created by transition metals (cobalt, nickel, and iron) coupled with NC can provide superior OER/ORR bifunctional properties. Moreover, the prepared NC layers with a multilevel pore structure contribute to a larger specific surface area, exposing numerous active sites and enhancing the uniformity of electron and mass movement. The CoNiFe 0.08 –NC@p–NCNTs show remarkable dual functionality for electrochemical oxygen reactions (ORR half-wave potential of 0.811 V, limiting current density of 5.73 mA cm −2 measured with a rotating disk electrode at a rotation speed of 1600 rpm, and OER overpotential of 351 mV at 10 mA cm −2 ), which demonstrates similar ORR performance to 20 wt% Pt/C and better OER performance than the commercial RuO 2 . A liquid ZAB prepared using the proposed material has excellent bifunctionality with an open-circuit voltage of 1.450 V and long-term cycling stability of 230 h@10 mA cm −2 .
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Nano Today
·
2024
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IF 13.2
Cong Wang,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Yu Zhang,Paul K. Chu,Shengli Zhu,Xiangmei Liu
Deep-seated osteomyelitis caused by bacterial infection, particularly methicillin-resistant Staphylococcus aureus (MRSA) infection, poses a significant challenge to treatment. In this study, we propose the utilization of a composite microwave (MW)-responsive polypyrrole-modified titanium carbide/zinc oxide (Ti 3 C 2 T x /ZnO–PPy) heterostructure as a potential therapeutic option for MRSA-infected osteomyelitis. In vitro and in vivo experiments show that Ti 3 C 2 T x /ZnO–PPy can effectively treat MRSA-induced osteomyelitis under MW irradiation, which is attributed to the enhanced in situ release of MW heat and reactive oxygen species (ROS). Density functional theory and MW network vector analysis further reveal that under MW irradiation, Ti 3 C 2 T x /ZnO–PPy generates free electrons that move freely within the heterogeneous interface formed by Ti 3 C 2 T x and ZnO, thereby enhancing the accumulation of charges. These charges combine with adsorbed oxygen at the interface to produce ROS. Furthermore, augmented dipole polarization induced by the functional groups on the surface of Ti 3 C 2 T x and the interfacial polarization between Ti 3 C 2 T x and ZnO contribute to good impedance matching and a favourable attenuation constant in the Ti 3 C 2 T x /ZnO–PPy composite, resulting in superior MW thermal properties. Moreover, the polypyrrole-modified composite shows excellent biocompatibility. This efficient antimicrobial system with MW irradiation is expected to offer a viable approach to the management of osteomyelitis.
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Small
·
2025
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IF 12.1
Yue Wang,Liguo Jin,Chaofeng Wang,Hanpeng Liu,Congyang Mao,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Yufeng Zheng,Shuilin Wu
Osteomyelitis caused by Staphylococcus aureus ( S. aureus ) is difficult to cure with antibiotics or phototherapy. Microwave (MW) has become a promising method for treating deep tissue infections due to its strong penetration ability, however, the effects of MW dynamics still need to be improved to achieve rapid and effective treatment. In this work, tin selenide/polypyrrole (SnSe/PPy) nanocomposites with MW thermoelectric catalytic performance are successfully prepared, and their ideal thermal production capability stems from increased dielectric loss, including interfacial polarization and conductive loss, as well as magnetic loss. Furthermore, the enhanced interchain electronic transport of PPy and the phonon scattering effect have improved the thermoelectric performance of SnSe/PPy. Under MW cyclic irradiation, SnSe/PPy can convert the generated temperature difference into electrical energy and further promote the ionization of sodium species, the plasma and electrons react with O 2 to produce superoxide anion (·O 2 − ), enabling SnSe/PPy to rapidly increase the temperature and effectively eliminate S. aureus infection. After irradiated circularly by MW for 20 min, the antibacterial effect of SnSe/PPy can reach 99.46 ± 0.11%. Considering the remarkable antibacterial effectiveness and excellent biosafety, it is believed that it provides new insights into the design of MW thermoelectric catalysis antimicrobial materials.
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REACTIVE & FUNCTIONAL POLYMERS
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2024
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IF 4.5
Lijie Huang,Yao Sheng,Qi Mo,Shuya Zhang,Yuluo Zheng,Beiwei Wang,Chongxing Huang,Qingshan Duan,Hui Zhao
Shape memory polymers , based on their unique property that they can automatically revert to their original shape after deformation when subjected to external stimuli, have shown great application prospects and practical value in many fields such as aerospace, automotive and biomedical in recent years. In this study, poly(lactic acid) (PLA)/polycaprolactone (PCL) is used as a substrate, and a graft product, PLA-g-GMA, is prepared by grafting glycidyl methacrylate (GMA) onto PLA as a compatibilizer , and then polymer substrates are prepared by melt extrusion . Then, light-responsive shape memory composites are prepared by loading polypyrrole (PPy) nanoparticles with photothermal conversion functionality into the PLA/PCL substrate, and PPy-coated NdFeB (PPy@NdFeB) is used as the functional phase to prepare auto-responsive shape memory polymers that can be programmed automatically. Among them, the PLA/PCL/PPy composites show shape recovery rate (R r ) and shape fixation rate (R f ) of 81.11% and 98.87%, respectively, at a strain of 85.27% under the programming conditions of a deformation temperature of 65 °C and a stress of 2.14 MPa. The PLA/PCL/PPy@NdFeB composite material, in addition to excellent double and triple shape memory behavior, also has obvious magnetic properties , which can be used to carry out self-programmed temporary shapes. This research aims to solve the limitations of temperature-responsive shape memory polymers in a single stimulus response mode, broaden their application scope, further promote the development of shape memory polymers, and provide realistic guidance for the field of 4D printing .
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ACS Applied Nano Materials
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2024
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IF 5.3
Xinyu Li,Qiyuan Zhang,Chenyang Guo,Hua Jiang
Poor dispersibility of pure polypyrrole in the hydrophilic matrixes has limited its application in wearable sensors. Fortunately, the in situ polymerization of Py adsorbed on the CNC surface resulted in polypyrrole@cellulose nanocrystal (PPy@CNC) with excellent dispersibility and electrochemical properties. It was found that the pyrrole (Py) was adsorbed on the CNC surface through the H-bonds. The adsorption capacity of the CNCs for Py was 1006.7 mg·g–1. The PPy grew along the CNC surface during the in situ polymerization. The PPy@CNC achieved a capacitance of more than 150.15 F·g–1. Even after 1000 CV testing cycles, nearly 98% of the capacitance was preserved. Incorporating 3% PPy@CNC yielded, by repeated freezing–thawing, a conductive PVA hydrogel with an optimal conductivity of 1.43 S·m–1, stress strength of 0.23 MPa, and toughness of 265.2 kJ·m–3. As a strain sensor, its gauge factor reached up to 2.28 at the strain of 100%. The test results on the human body also showed that this hydrogel was an ideal material for a wearable sensor. Therefore, the in situ polymerization of the Py confined to the CNC surface is an effective method for creating PPy@CNC-based conductive filler. The green conductive hydrogel with good conductivity and mechanical performance could be fabricated only by physical cross-linkage after incorporating this filler in PVA. As a result, the PPy@CNC has the potential to be applied to wearable sensors.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ruiqi Che,Sha Cheng,Cheng Huang,Ming Liu,Zhongao Chen,Jin Han,Wen Chen,Pengchao Zhang
Lithium dendrites, growing during the charging and discharging processes, can pierce the separators and lead to internal short circuits, which is one of the main factors resulting in thermal runaway of lithium metal batteries (LMBs). In this work, we developed a poly(vinylidene fluoride) (PVDF)-based Janus separator with an ultrathin polypyrrole (PPy) layer towards efficiently suppressing lithium dendrite growth. The PPy layer with thickness of approximately 200 nm has Pyrrole-N with lone pairs of electrons, which can act as nucleation sites for lithium ions. As a result, lateral lithium deposition can be achieved on the anode, thus preventing the lithium dendrites from piercing the separators. Stable stripping/plating performance over extended cycling and a capacity retention rate of 76.8% after 1000 cycles have been achieved in the Janus PVDF/PPy separator-based Li//Li symmetric cells and Li//LiFePO 4 half cells, respectively. The development of Janus separators with conductive polymer layers presents a promising solution for improving the safety and electrochemical performance of LMBs.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Zilong Wang,Yuan Yuan,Kai Sun,Pengtao Yang,Zongxiang Wang,Runhua Fan
High density, skin effect, and environmental instability are significant limitations that restrict the application of metal-based microwave absorbers in achieving lightweight, high performance, and long service life. This study broke from traditional methods for preparing a microwave absorber Mn 2 O 3 -Fe 3 O 4 @PPy (polypyrrole) by employing an innovative annealing process to convert metal into metal oxide by the introduction of metal organic framework (MOF), which effectively achieving a more lightweight absorber material with hollow porous nanocube structure. Subsequently, PPy was coated onto the metal oxide surface to form a core-shell structure by a situ chemical oxidation synthesis method. The combination of metal oxide of the hollow porous nanocube structure and the core-shell structure formed by highly conductive PPy shell significantly enhanced heterogeneous interfaces and electromagnetic (EM) wave reflection. Excellent dielectric loss and impedance matching contributed evidently to the ultra-wideband EM wave absorption performance. It was demonstrated that, with a filling amount of only 20 wt%, the prepared Mn 2 O 3 -Fe 3 O 4 @PPy achieved an effective bandwidth (EAB) of 10.0 GHz at a thickness of 3.08 mm, with EAB max reaching 13 GHz. At a filling amount of only 10 wt%, the reflection loss ( RL ) was −62.13 dB, achieving an EAB of 7.4 GHz at 2.98 mm thickness, with EAB max reaching 11.4 GHz. Furthermore, the proposed strategy incorporating metal oxide and PPy enhanced corrosion resistance with higher charge transfer resistance.
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