SYNTHETIC METALS
·
2025
·
IF 4.6
Yu Lin,Gen Li,Juan Teng,Haibo Wang,Ximei Liu
As a crucial component of flexible electronic devices, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based hydrogels for strain sensors have garnered extensive attention for their potential in the field of wearable sensors due to their inherent conductivity and flexibility. However, challenges such as poor mechanical strength, limited sensitivity, and poor durability have hindered the widespread application of PEDOT:PSS hydrogels in high-performance strain sensors. In this study, we develop a novel PEDOT:PSS-P(HEMA-co-AA) hydrogel that addresses common limitations in hydrogel applications, demonstrating remarkable stretchability, low hysteresis, and reliable conductivity. The hydrogel is synthesized using a semi-interpenetrating polymer network (SIPN) strategy, combining the linear conducting polymer PEDOT:PSS with a chemically cross-linked network based on 2-hydroxyethyl methacrylate (HEMA) and acrylic acid (AA). This hybrid structure notably contributes to the hydrogel's mechanical properties, achieving a stretchability of 195 %, while maintaining a rapid response time of 0.20 seconds and exceptional cyclic stability over 1000 cycles under 100 % strain. Moreover, the hydrogel demonstrates promising strain-sensing capabilities, positioning it as a strong candidate for future applications in wearable electronics and flexible sensors. The adoption of the SIPN strategy, along with the synergistic combination of PEDOT:PSS and P(HEMA-co-AA), paves a new pathway for enhancing the mechanical performance and sensing properties of hydrogels in strain-sensing technologies.
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2024
·Vol. 20
·期 16
·3436-3447
·
IF 2.9
Yubing Han,Bori Shi,En Xie,Peng Huang,Yaozhong Zhou,Chang Xue,Weijia Wen,Huayan Pu,Mengying Zhang,Jinbo Wu
Flexible actuation materials play a crucial role in biomimetic robots. Seeking methods to enhance actuation and functionality is one of the directions in which actuators strive to meet the high-performance and diverse requirements of environmental conditions. Herein, by utilizing the method of adsorbing N-doped carbon dots (NCDs) onto SiO2 to form clusters of functional particles, a NCDs@SiO2/PDMS elastomer was prepared and its combined optical and electrical co-stimulation properties were effectively harnessed to develop a biomimetic crawling robot resembling Rhagophthalmus (firefly). The introduction of NCDs@SiO2 cluster particles not only effectively improves the mechanical and dielectric properties of the elastomer but also exhibits fluorescence response and actuation response under the co-stimulation of UV and electricity, respectively. Additionally, a hybrid dielectric elastomer actuator (DEA) with a transparent SWCNT mesh electrode exhibits two notable advancements: an 826% increase in out-of-plane displacement under low electric field stimulation compared to the pure matrix and the ability of NCDs to maintain a stable excited state within the polymer for an extended duration under UV-excitation. Simultaneously, the transparent biomimetic crawling robot can stealthily move in specific environments and fluoresce under UV light.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Chaoran Zhou,Zhixian Liang,Hao Qiu,Shanshan Jiang,Wei Wang,Chao Su
Solid oxide fuel cells (SOFCs) as highly effective energy conversation devices have gained substantial recognition and research interest. The electrochemical properties of the traditional SOFCs are restricted by the sluggish reaction kinetics for the cathode material when lowering the operation temperature to below 600°C. In addition, the stability of the cathode at reduced temperatures is also a big challenge for the widely popularization of SOFC technology. Achieving high activities and stable ORR in the cathode is crucial for the development of SOFCs. The doping active metal method has been demonstrated as an effective approach to optimize the phase structure and improve the ORR activity of the cathode. Herein, we successfully develop an Ir-doped SrCoO 3 − δ (SrCo 0.98 Ir 0.02 O 3 − δ , SCI) cathode for SOFCs. SCI exhibits a low area-specific resistance (ASR) of 0.057 Ω cm 2 at 650°C, ~ 44% lower than 0.102 Ω cm 2 of Ir-free SrCoO 3 − δ . The Ni–Sm 0.2 Ce 0.8 O 1.90 (SDC) anode-supported fuel cell with SDC electrolyte and SCI cathode obtains an excellent output performance (e.g., 1,128 mW cm −2 at 650°C). The desired results underscore the feasibility of the Ir-doping strategy as an optimized method for the exploitation of advancing cathode in SOFCs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yangyang Wang,Wenzheng Zhu,Guanyu Wang,Caiyun Chen,Wei Xu,Yanjiao Li,Lizhuang Chen,Yingying Chen,Hongxun Yang
Carbon-based materials have excellent conductivity, low cost, and environmental friendliness, making them the primary choice for negative electrode in sodium ion batteries (SIBs). Among them, hard-carbon and soft-carbon as amorphous carbon are considered to have potential as negative electrode for SIBs. However, soft-carbon exhibits a slow charging speed and poor low-temperature performance and hard-carbon behaves a low initial coulombic efficiency, resulting in a key obstacle to their extensive applications in SIBs. Herein, a new N/O co-doping soft-hard carbon nanofiber (PCNF) composite was prepared by electrospinning with heat treatment method, petroleum coke (PC) as soft-carbon and oxygen source and polyacrylonitrile (PAN) as hard-carbon and nitrogen source. The optimal PCNF-800 carbonization at 800 °C delivers an enhancement capacity of 296.1 mAh g −1 at 25 mA g −1 after 100 cycles with the capacity retention of 88.2 %. The excellent electrochemical property is ascribed to the co-doping of N/O in the carbon resulting in the large number of defects which could enhance Na + adsorption and transport, the appropriate interlayer spacing, the porous nanofiber mircostructure, and the synergistic effect between soft and hard carbon. Meanwhile, this study provides a possible new idea for the high-value utilization of petroleum coke.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Wangmei He,Yunfei Xie,Qingguo Xing,Peilong Ni,Yingchao Han,Honglian Dai
Herein, a polyacrylic acid sol-gel method was presented to synthesize rare earth doped calcium phosphate nanocrystals (RE-CaP) as cell bioimaging agent. The effects of calcination temperature, calcination time and PAA concentration on phase composition , morphology, size and luminescence were discussed. In addition, the hemolysis, cytotoxicity, cell uptake and cell imaging of resulting RE-CaP nanocrystals were investigated. Results show that the increases in calcination temperature and time promote the transformation of product from impure crystalline phase (CaCO 3 , CaO) to pure CaP phase. The rise of calcination temperature results in significant enhancement of luminescence intensity. PAA concentration does not influence the crystalline phase composition and its increase leads to a little increase in luminescence intensity. In addition, the co-doping of Gd 3+ improves the luminescence intensity of Eu 3+ emissions. This method achieves the doping of Eu 3+ ions in the crystallographic Ca 2+ I and Ca 2+ II sites of HAP with a preferable occupation at Ca 2+ II site. The resulting RE-CaP nanocrystals (PAA: 0.6 mg/mL, Eu/Gd = 2:1.5, 600 °C, 3 h) show good biocompatibility and can be easily uptaken by cancer cells. The internalized nanocrystals show stable and strong red luminescence under visible wavelengths excitation. In summary, PAA sol-gel method can be used to synthesize biocompatible RE-CaP luminescent nanomaterials for cell bioimaging.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yukang Fan,Fangbao Fu,Dongjie Yang,Weifeng Liu,Xueqing Qiu
Constructing heteroatom-doped porous carbons with distinct charge storage properties is significant for high-energy–density supercapacitors, yet it remains a formidable challenge. Herein, we employed a thiocyanogen-modulated alkali activation strategy to synthesize N and S co-doped lignin hierarchical porous carbon (NSLHPC). In this process, thiocyanogen serves as a surface modulation mediator to substitute oxygen with nitrogen and sulfur species, while the combination of KOH activation and MgO template generates numerous nanopores within the carbon structure. The three-dimensional interconnected nanosheet architecture facilitates rapid ion transfer and enhances accessibility to active sites. Density functional theory (DFT) calculations demonstrate that introducing N and S heteroatoms through oxygen substitution reduces the adsorption energy barrier of Zn 2+ . Consequently, the optimized NSLHPC exhibits a remarkable specific capacitance of 438F/g at 0.5 A/g in 6 M KOH, delivering an energy density of 10.4 Wh/kg in the symmetric supercapacitor and an impressive energy density of 104.9 Wh/kg in the zinc-ion hybrid capacitor. The NSLHPC cathode also shows an excellent lifespan with capacitance retention of 99.0 % and Columbic efficiency of 100 % over 10,000 cycles. This study presents innovative strategies for engineering high-performance porous carbon electrode materials by emphasizing pore structure modulation and N, S co-doping as crucial approaches.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Pengsen Zhao,Haizhong Zheng,Guifa Li,Yongxiang Geng,Yixin Xiao,Hongbo Guo,Gang Wang,Shixian Zhao,Ping Peng
The thermal cycling behavior of Yb 3+ -Ce 4+ -La 2 Zr 2 O 7 /YSZ (LYZCO/YSZ) TBCs was systematically investigated via experiment and first-principles calculation. Results suggest that ceramic grain boundary cracking is the root cause of LYZCO/YSZ TBCs thermal cycle failure. Compared to La 2 Zr 2 O 7 /YSZ TBCs, LYZCO/YSZ TBCs own an outstanding thermal cycle life at 1100 ℃, which is attributed to LYZCO's higher TEC (10.431×10 −6 /K, 1100 ℃) and lower thermal conductivity (1.299 W/(m·K), 1100 ℃). Furthermore, Griffith's separation work of the LYZCO/YSZ interface is merely −0.576 J/m 2 , implying that the LYZCO/YSZ TBCs are particularly prone to cracking at this interface. Weakly bonded La-O is the first site at this interface cracking.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 42
·2406920
·
IF 18.5
Zhongyuan Wen,Jingzhi Tang,Maomao Zhai,Sihuan Wang,Shouwei Zhang,Jinfeng Wang,Yongming Cui,Qingtao Liu,Jinming Zhang,Xungai Wang
Silk fibroin (SF) is a natural biomaterial from silk, which has outstanding biocompatibility. However, regeneration SF materials usually suffer from brittleness, which restricts their applications. Here, a novel supramolecular co-assembly strategy is reported for the preparation of a Bolas-shaped polyethylene glycol peptide (BPP)/SF film, where the peptide and SF form a robust payload co-assembled network and polyethylene glycol (PEG) fragments form supramolecular cross-linking in this network. The obtained BPP/SF film shows both high stress (27.8 MPa), high toughness (3.64 MJ m −3 ), high transparency (89%), and high mid-infrared (MIR) emissivity (90.5%). In passive radiative cooling, the BPP/SF film results in a 2.7 °C reduction in the temperature of the human arm skin and a 14.6 °C reduction in the temperature of the solar cell. More importantly, this novel BPP co-assembly SF material can be recycled and reused while maintaining its original mechanical strength. This work provides a novel strategy for fabricating regenerative SF materials with ultra-strong and ultra-tough mechanical performance.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Zhang Beibei,Zhang Lihua,Li Jin,Qiang Qi
Carbon emission reduction has been accepted as a common concern all over the world. Currently, CO 2 emission is mainly derived from the consumption of fossil fuels. To solve this issue, there is an urgent need to develop technologies for CO 2 capture. The utilization of membrane technology to remove CO 2 from a mixture gas attracts great interest. In the present work, poly(2-hydroxyethyl methacrylate- co -vinylamine) was synthesized by polymerization ( n -vinyl formamide and 2-hydroxyethyl methacrylate), hydrolysis, and ion exchange. The surface function of graphene oxide was carried out by aerobic self-polymerization of dopamine. The mixed matrix membranes were fabricated by adding the nanofiller (before and after modification) into the polymeric matrix. The membrane properties and its structure were characterized by FTIR, TGA, XRD, and SEM. The effect of nanofiller content and operation conditions on membrane performance was investigated. Results showed that the additions of nanofiller could decrease the crystallization of these membranes and effectively improve gas permeance. Remarkably, for the addition of 2.0 wt% dopamine-modified graphene oxide, the CO 2 permeance of the membrane was increased by 30.9% while achieving a CO 2 /N 2 selectivity of 83.5. The CO 2 permeation for CO 2 /CH 4 was also increased by 16.77%. These were surpassed over the 2008 Robeson’s upper bound. These resultant membranes demonstrated attractive potential for low-pressure post-combustion CO 2 capture. Besides, the stability of longtime tests on membranes was studied, and it was observed that membranes exhibited excellent stabilization with continuously operated for 220 h. The excellent properties of these membranes provide new opportunities for gas separation applications.
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2025
·
IF 4.1
Li Wangliang,Fang Yi,Chang Shengqiang,Mi Shuzhen,Zhao Shengyong
Co-gasification of biomass and coal offers a strategic approach to enhance the sustainability of energy resources by exploiting the inherent synergies between various biomass components (cellulose, hemicellulose, and lignin) and coal. This study investigates the co-gasification in a downdraft fixed-bed reactor, focusing on the impacts on gas yield, calorific value, and carbon structure transformations. Thermogravimetric analysis revealed parameter-specific effects of biomass components during gasification. At a 50 wt% blending ratio, cellulose significantly enhances gasification, increasing calorific value and CO production beyond theoretical predictions. In contrast, lignin inclusion at a 70 wt% ratio decreases the calorific value and CO production by 6.44% and 11.21%, respectively. Additionally, hemicellulose is found to catalytically enhance CO 2 conversion, with a maximum increase of 45.99% at a 70 wt% ratio. The study elucidates the differential impacts of each biomass component on the co-gasification process and underscores the potential of optimizing biomass blends to maximize the efficiency and sustainability of energy production.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xinlei Jia,Donghui Guo,Zelong Wang,Ning Zhou,Runze Jin,Baosheng Xu
Regulating the composition and microstructure of nanomaterials is a major challenge in the development of high-performance materials for electromagnetic wave (EMW) absorption. This paper introduces a new lightweight EMW-absorbing material Co@N/C with a yolk–shell structure and compositions of ferromagnetic metal and carbon materials. The minimum reflection loss (RL min ) of the as-designed Co@N/C nanospheres with a filler loading of 25 wt% reaches −67.68 dB and the effective absorption bandwidth of a 1.9 mm thickness is 5.3 GHz. The exceptional absorption performance of the EMW absorption is primarily achieved through the synergistic effect between the Co–carbonaceous material and the yolk–shell structure, which optimizes the impedance matching. The polarization loss, conductivity loss, magnetic loss, and multiple scattering mainly contribute to the excellent EMW-absorption ability of the materials. The proposed method for regulating the structure and morphology of Co@N/C can efficiently construct high-performance EMW absorbers.
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 9
·1912
·
IF 2.8
Bowen Lu,Huiying Sang,Liang Liu,Zhijian Yu,Yaqin Guo,Yongqing Xu
The catalytic applications of micron Cu powder are limited due to its large particle size and small specific surface area. Modifying micro-Cu powder to achieve a high catalytic performance is a challenge in the application of micron copper. In this work, micro-Cu was used to synthesize a CeO2–Cu catalyst, and the phase composition and surface pore structure were analyzed using XRD, BET, etc. The CO2hydrogenation performance of the CeO2–Cu catalyst was analyzed in comparison with CeO2and Cu, and we found that the CeO2–Cu catalyst exhibited a synergistic effect between Cu and cerium, resulting in a much higher hydrogenation performance at 500 °C than CeO2or Cu alone. H2-TPR and TEM characterization revealed that the CeO2–Cu catalyst formed interfacial interactions with a relatively large Ce–Cu interface, where cerium oxide could promote the reduction of CuO and lower the reduction temperature. Additionally, cerium oxide formed a confinement structure for Cu, and the CeO2–Cu catalyst exhibited a higher oxygen vacancy concentration, thereby promoting the CO2hydrogenation performance. Cu–CeO2interaction provides valuable insights into the catalytic application of micron Cu powder.
✓ 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）