查找使用阿拉丁产品的科研文献

Repurposing E-Waste Cathodes as Catalysts for CO2 Reduction via Reverse Water-Gas Shift Reaction

Zhihao Zhou,Siyuan Duan,Guangze Nie,Zhenkun Sun,Lunbo Duan

Reverse water-gas shift (RWGS) reaction offers a promising pathway for utilising green H2 to reduce CO2 into CO, a valuable precursor for e-fuel production. Conventional catalyst synthesis methods, however, often rely on costly and complex procedures using fine chemical precursors. In this study, we repurpose retired ternary lithium-ion battery cathodes (rTLIBCs), prevalent e-waste from the electric vehicle industry, as catalysts for the RWGS reaction. Using a straightforward method of mixing rTLIBC material with Al2O3 powder, we successfully synthesise xNCM/Al2O3 catalysts with high CO2 conversion and CO selectivity. Notably, the 10NCM/Al2O3 catalyst demonstrates the highest CO space-time yield at 450–600 °C, with stable performance across long-term tests, maintaining CO2 conversion, CO selectivity, and CO space-time yield. The performance of our prepared catalyst is comparable to that of the best catalysts synthesised using fine chemicals. The high catalytic performance is attributed to the synergistic effect of a Ni-Co bimetallic alloy formed during pretreatment, strong metal-support interaction, and alkali metal Li. Ni-Co alloy formation optimises the catalytic activity and selectivity, the metal-support interaction enhances CO2 activation, and Li boosts basicity and fine-tunes the reaction pathway. This study validates that rTLIBCs are a viable raw material for practical RWGS catalyst synthesis, providing a sustainable alternative for e-waste utilisation.

A high-performance photonic-ionic E-skin with synergistic electronic/optical sensing for motion tracking

An Tang,Jiachen Wang,Jia-Li Xu,Jun-Tao Liu,Tianpeng Xu,Qiang Zhang,Yu Tian

The integration of visualization and electrical feedback in biomimetic electronic skin (E-skin) for real-time motion tracking has attracted significant attention in wearable electronics. To facilitate human-readable interactive feedback and improve the overall performance of E-skin, particularly regarding mechanical compliance, sensitivity, and stability, we propose a novel high-performance photonic-ionic skin (PI-skin) based on mechanochromic photonic ionogel. The PI-skin, prepared by incorporating aligned magnetic colloids into an ionogel matrix, integrates interactive structural coloration and electrical responses to external stimuli, achieving dual-mode precise motion recognition. Due to the enhanced hydrogen bonding and electrostatic interactions within the ionogel matrix, the PI-skin exhibits excellent mechanical properties (tensile strain >1000%), remarkable adhesive strength (peeling force >7 kPa), high sensitivity (gauge factor = 1.42 at straining 0%–300% and 2.71 at straining 300%–500%), rapid response time (120 ms), and exceptional mechanical compliance (>500 continuous cycles). More importantly, such PI-skin demonstrates ultrafast and highly accurate optical/electrical dual-signal motion detection, thereby facilitating posture correction during sitting and encoding of vocal cord vibrations during speech. We anticipate that this versatile PI-skin will possess substantial potential in the field of wearable electronics, and may inspire the design of next-generation E-skin for human-computer interaction and personalized healthcare applications.

Chaetosemins A–E, new chromones isolated from an Ascomycete Chaetomium seminudum and their biological activities

He Li,Jun-Mian Tian,Hao-Yu Tang,Shi-Yin Pan,An-Ling Zhang,Jin-Ming Gao

Fifteen aromatic polyketide metabolites, including four new chromones, chaetosemins B–E (2–5), with compound 4 bearing a new skeleton, and two new natural products, chaetosemin A (1) and (+)-(S)-chaetoquadrin J (14), together with nine known ones (6–13, 15), were isolated from the organic extract of a solid fermented culture of an Ascomycete filamentous fungus, Chaetomium seminudum. The structures of 1–5 were determined by spectroscopic analysis, and the absolute configuration of chaetosemin A (1) was confirmed by X-ray crystallography, whereas the stereochemistry of 1–4 and 14 was assigned by comparison of their specific optical rotations with reported data for structurally related compounds. All compounds were isolated for the first time from Chaetomium seminudum. Compounds 1 and 2 consisted of L-cysteine and D-cysteine units, respectively. Most of them were evaluated for in vitro antifungal activities against some phytopathogenic fungi. Among them, chaetosemin B (2) was the most active against Magnaporthe oryzae and Gibberella saubinettii with MICs of 6.25 and 12.5 μM, respectively. In addition, chaetosemin C (3) showed antioxidant activity with 50.7% DPPH free radical scavenging activity at 50 μM, and chaetoquadrin J (14) displayed weak inhibition of soluble epoxide hydrolase (sEH).

ALP1 polysaccharide promotes porcine intestinal epithelial proliferation through a CDK4–Cyclin E-dependent G1/S transition

Qiyuan Luo,Shiqiang Li,Chenglong Zhang,Yijing Chen,Yun Chen

ALP1 is a structurally defined polysaccharide isolated from Amomum villosum T.L. Wu fruits with an average molecular weight of 26.1 kDa. Previous studies have demonstrated that ALP1 promotes growth performance of piglet by regulating proliferation of intestinal epithelial cells. However, the molecular mechanism remains incompletely understood. In the present study, the absorbability of ALP1 by porcine small intestine epithelial cells and regulating mechanism of ALP1 on cell proliferation were investigated. The results showed that ALP1 resists gastrointestinal degradation and is efficiently absorbed by intestinal epithelial cells via endocytosis. Furthermore, ALP1 facilitates cell cycle progression through upregulating expressions of cdk4 and cyclin e , resulting in an increased proportion of cells in the S and G2/M phases. These findings provide insights into the cellular mechanisms underlying the growth-promoting effects of ALP1 and highlight the potential of dietary polysaccharides as functional agents for enhancing animal growth and gut health.

Dynamic Cu–Fe Dual Sites Steering Tandem e–/H+ Delivery for Efficient NH3 Electrosynthesis in Acid

Yuan Ma,Yongli Li,Lan Jiang,Xin Kong,Xin You,Liang Liu,Rui Bao,Zhenhua Ge,Hao Cui,Feng Liu,Jianhong Yi

The energy-intensive Haber-Bosch process for ammonia synthesis necessitates sustainable alternatives, electrochemical nitrate reduction (eNO3RR) is emerging as a promising route to address nitrate pollution. However, it faces a critical bottleneck: the low ammonia selectivity arising from competitive hydrogen evolution. Herein, we introduce copper carbon dots-supported iron phthalocyanine (Cu-CDs/FePc) - a electrocatalyst featuring dynamic Cu–Fe dual sites that steer tandem e–/H+ delivery for efficient NH3 electrosynthesis. It achieves an outstanding ammonia yield of 17.69 mg h–1 mgcat.–1 with a remarkable Faradaic efficiency of 91.0% at −0.7 V vs RHE in acid conditions, which surpasses many reported transition metal-based electrocatalysts for eNO3RR. In-situ FTIR spectroscopy and density functional theory (DFT) calculations elucidate that dynamic Cu–Fe dual sites orchestrate directional electron–proton relay chains through electronic complementarity: Electron-deficient Cu2+ centers intensify NO3– adsorption/activation, while electron-enriched Fe2+ sites drive *NO2 protonation, and interfacial charge shuttling initiates valence oscillations (Cu+/Cu2+ and Fe2+/Fe3+) effectively lower rate-determining step energy barrier, thereby boosting ammonia selectively while simultaneously suppressing hydrogen evolution. Furthermore, the catalyst exhibits robust stability over 100 h and practical versatility in zinc-air battery systems. This work presents a rational design strategy for high-performance eNO3RR catalysts, offering a significant advance toward efficient green ammonia synthesis and environmental remediation.

Fabrication, characterization, and bioactivity assessment of chitosan microemulsion containing lauric acid-vitamin E against foodborne pathogens

Chen Li,Peipei Ma,Xiaoyue Sui,Aminu Abdullahi Mahmoud,Xinyu Liao,Tian Ding,Runrun Zhang

The stable food-grade lauric acid emulsions were developed. • Emulsions showed homogeneous structure and good viscoelastic stability. • The emulsions exhibited notable antioxidant activity and activity against S. aureus . • Antibacterial activity linked to membrane damage and energy disruption. Lauric acid (LA) is an antimicrobial medium-chain fatty acid, but its poor aqueous solubility limits its application in food matrices. To address this, ultrasound-assisted emulsion was developed using LA in vitamin E (VE) oil and chitosan-polyvinyl alcohol (CS-PVA) aqueous matrix. The emulsion exhibited uniformly dispersed oil droplets forming a compact network structure, along with superior stability and viscoelastic properties. No phase separation was observed during storage except for the 5 CP/VL system after 30 days, where CP/VL refers to the CS-PVA/VE-LA. Functionally, the emulsion disrupted bacterial membrane integrity and interfered with cellular energy metabolism. The 10 CP/VL formulation achieved a favorable balance between stability and bioactivity, with DPPH scavenging rate of 26.57% and 2.8 log CFU/mL reduction of Staphylococcus aureus after 2 h at 1% concentration. Overall, this study provides a feasible strategy for enhancing the dispersion and function of LA in aqueous systems for food-related applications. Download: Download high-res image (399KB) Download: Download full-size image

Dual-Dynamic Polyurethane Elastomers Integrating High Strength and Room-Temperature Self-Healing for an E-Skin

Yufei Cao,Pengyu Zhu,Shuo Yang,Wenwen Wu,Dongli Fan,Peng Zhu,Haiyan Ma,Hongbin Lu,Jie Liu,Yufeng Cao,Tao Qian

Conventional flexible sensors often face a compromise between mechanical properties and self-healing ability, which severely limits their long-term usability and functional reliability. In this work, we report a series of polyurethane elastomers synergistically reinforced by multiple hydrogen bonds and disulfide bonds, which integrates high mechanical strength and autonomous self-healing ability. The optimized composition, PU-BHO0.3-BHDS0.7, achieved an excellent breaking strength of ∼39.73 MPa, an elongation at break of ∼1568.61%, and a fracture energy of ∼157.75 kJ·m–2. It also exhibited an ultrahigh self-healing efficiency of ∼99.29% at room-temperature, retaining ∼85.90% even at −18 °C. Based on this elastomer, we fabricated a multilayer resistive sensor using liquid gallium (LG) and carbon black (CB) as conductive electrodes. The healed sensor maintained a gauge factor and resistance response nearly identical to its original state, demonstrating complete functional restoration. This work provides a feasible strategy for developing high-performance self-healing materials suitable for durable flexible electronic devices, such as human motion sensors.

Bio-derived protein-based E-skin: Ionic liquid-enhanced hydrogel sensors with high conductivity and biocompatibility

Yanyan Lu,Yuhui Zhao,Guo Zhao,Xinglian Xu,Xue Zhao

An MP-IL dual-network hydrogel sensor is developed from chicken by-products. • It offers skin-matched modulus, high conductivity, and wide-range dmotion monitoring. • The hydrogel shows high biocompatibility with no inflammatory response. • The hydrogel shows negligible IL leakage and stable 200-cycle performance. • This MP-based e-skin uniquely integrates biosafety and and biodegradability. Biocompatible sensors with tissue-like mechanical properties are urgently needed for individuals with communication and movement disorders. Conductive hydrogels are promising candidates, yet conventional synthetic versions face biosafety and degradability challenges for long-term wearable use. In this work, we developed a biocompatible dual-network hydrogel sensor for high-performance epidermal sensing, integrating the skin-homologous myofibrillar proteins (MP) with ionic liquid (IL) through unique molecular design. The hydrogel network is constructed via Schiff-base crosslinking between MP and oxidized dextran (ODex), interpenetrated with an ionically cross-linked sodium alginate (SA) network. This unique design achieves skin-matched mechanical properties (tensile strength 440.4 ± 16.6 kPa, elastic modulus 342.5 ± 12.2 kPa) and high ionic conductivity (9.1 mS/cm). The resulting sensor exhibits excellent strain response (0.4 s) and recovery (0.2 s) times, high sensitivity (gauge factor ~ 1.55), and stable resistance variation under both tensile and compressive deformation, showing potential for monitoring a wide range of motions from subtle physiological signals (e.g., frowning, swallowing, and smiling) to large-scale joint movements, speaking, and handwriting signal monitoring, with possible relevance to throat motion monitoring and assistive communication. The ionic liquid shows negligible leakage (<5% cumulative release over 7 days), and the hydrogel maintains stable mechanical performance over 200 cyclic loading-unloading tests, supporting long-term wearable reliability. In vitro cytotoxicity, in vivo skin patch, and implantation tests confirm excellent biocompatibility (cell viability ≥94.2%) with no significant inflammatory response. Sourced from low-cost chicken meat by-products, this hydrogel provides an alternative platform for next-generation epidermal electronics that harmonizes biosafety and biodegradability. Download: Download high-res image (160KB) Download: Download full-size image

Bimodal Thermoelectric/AIE E-Skin Decouples Contact-Area Ambiguity for Concurrent Pain Perception and Injury Mapping

Bingchen Huo,Fengxia Kuang,Chunyu Du,Chengzhi Chen,Qi Sun,Wanqiang Li,Lirong Liang,Hanfu Wang,Cun-Yue Guo,Guangming Chen

Thermoreceptive electronic skins face fundamental limitations due to signal ambiguity caused by the contact-area effect in thermoelectric devices. Since electrical output depends on total heat flux, localized high-temperature stimuli generate indistinguishable signals from widespread low-temperature stimuli, leading to unreliable thermal hazard assessment. To address this challenge, we developed a dual-modality bilayer e-skin integrating a single-walled carbon nanotube-based thermoelectric layer and an aggregation-induced emission luminogen-based photoluminescent layer. The bottom thermoelectric layer functions as a fast-response nociceptor, converting temperature gradients into voltage-encoded “pain” signals. The top AIE layer provides contact-area-independent optical mapping of thermal fields through photoluminescence quenching, enabling direct visual decoupling of temperature from contact area without computational processing. This integrated platform achieves real-time injury visualization, accurate temperature recognition (>97% accuracy), and reliable nociceptive-like sensing. Validated by a biomimetic robotic reflex system, the e-skin offers a robust solution for intelligent safety protection and enhanced human-machine interaction in dynamic thermal environments.

Synthesis of (E)-β-iodovinyl sulfones via DTBP/I2 promoted difunctionalization of alkynes with sodium benzenesulfinates

Wenzhu Bi,Chunyan Ren,Linguo Jia,Xiaoyi Xia,Xi Chen,Xiaolan Chen,Yufen Zhao

The conversion of woody oils into E-octadec-9-enedioic acid and multiple-shape memory polyamides

Huihui Gao,Xiankun Wu,Yaowen Hu,Mang Wu,Wei Liu,Zhongkai Wang

Although tremendous efforts have been made to convert woody oils into valuable chemicals, most of the known protocols still require multi-step procedures and rigorous conditions. Herein, a highly efficient method for converting woody oils into long-chain unsaturated dicarboxylic acid was reported. Such a strategy holds promises for opening new routes for utilizing woody oils. Firstly, self-metathesis of fatty acids from Rubber seed oil (RSO), Sapium sebiferum oil (SSO) and High oleic Canola oil (HOCO) were optimized. Pure E -octadec-9-enedioic acid monomer (C18) was obtained, and confirmed by 1 H NMR and FTIR spectra. The prepared dicarboxylic acid was then experienced condensation polymerization with 1,6-hexamethylenediamine. The chemical structures of the obtained polyamides were investigated by FTIR and 13 C NMR spectra. DSC , TGA, DMA, and tensile testing was used to explored their thermal and mechanical properties. Interestingly, due to the existence of broad melting and glass transition, the prepared polyamides possess multiple-shape memory properties.

Study on Mechanical Properties of Polyurethane Cross-Linked P(E-co-T)/PEG Blended Polyether Elastomer

Puyu Jin,Aimin Pang,Rongjie Yang,Xiaoyan Guo,Jiyu He,Jinxian Zhai

To improve the mechanical properties of polyurethane cross-linked poly (ethylene oxide-co-tetrahydrofuran) (P(E-co-T)) elastomers at room temperature, using poly (ethylene oxide-co-tetrahydrofuran) and high-molecular-weight polyethylene glycol (PEG) as raw materials and polyisocyanate N100 as curing agent, a series of polyurethane cross-linked blended polyether elastomers were prepared by changing the elastomer-curing parameter R value (n(-NCO)/n(-OH)) and P(E-co-T)/PEG ratio. Equilibrium swelling measurements showed that the chemical cross-linkage of the elastomers tended to decrease with the decreasing R value, the average molecular weight (Mc) of the network chain increased, and the density of the network chain (N0) decreased. Wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) tests showed that PEG chain segments within the elastomers crystallized at room temperature, while the crystallinity increased with decreasing R value and increasing PEG content. The mechanical property tests showed that the elongation at break tended to decrease with increasing R value; the tensile strength first increased and then decreased. At R value 0.9, the elastomer presented good comprehensive mechanical properties. In addition, the mechanical properties of polyurethane cross-linked P(E-co-T)/PEG blended polyether elastomer showed an increasing trend with the increase in PEG content when the curing parameter of 0.9 remained unchanged.Keywords:polyurethane cross-linked elastomer;polyether blend;crystallinity;mechanical properties