查找使用阿拉丁产品的科研文献

Silicon confinement enabled by heterogeneous carbon networks for stabilized lithium storage

Wan Qi,Tong Liping,Li Yingjun,Zhang Yunfeng,Zhao Bo,Zou Zhijuan,Li Jingkang,Liu Zhiwei,Chen Tao,Zhu Wenkun,Song Yingze

In this investigation, Si nanoparticles are anchored onto a multi-level carbon structure (C-MSZSZ) derived from a heterogeneous MOF. The hierarchical carbon layers strongly bind the Si nanoparticles, providing sufficient void space to accommodate volume expansion during cycling. Additionally, the creation of trimetallic active centers and carbon defects boost electrical conductivity and Li + transport kinetics. The presence of abundant open channels within the carbon matrix also facilitates the transfer of electrons and ions, thereby leading to a promoted electrochemical reaction process. As a result, the battery harvests a high reversible capacity of 1035.7 mA h g –1 at 0.5 A g –1 after 200 cycles, along with remarkable rate capability. The delicate design of multi-level carbon architecture offers a promising strategy for the development of advanced anode materials aimed at achieving high-performance LIBs. Based on a delicate “layer-by-layer” assembly strategy, the silicon anode shows a robust structural integrity and favorable performance owing to the significantly relieved volume expansion and optimized electron/ion transport kinetics. Graphical abstract

Influence of oxygen-containing functional groups on the surface of carbon materials on liquid-phase oxidation of cumene

Xu Li-xin,Wang Si-zhe,Fan Bing-xu,Chen Xin-shun,Wan Chao

Carbon materials are extensively employed in chemical production for the selective oxidation of aromatics. In this study, the activated carbon nanomaterial catalyst significantly enhanced the oxidation reaction efficiency of cumene while promoting the high conversion of cumene peroxide (CHP) to 2-phenyl-2-propanol (PP). The carbon synthesised from furfural residue (C-F) achieved a 39.48% cumene conversion and 54.95% PP selectivity, representing the most outstanding catalytic performance among all catalysts studied. The structural characteristics of the synthesised catalyst were systematically analysed using TEM, XPS, BET, and Raman spectroscopy. Furthermore, comparative experiments confirmed that oxygen-containing functional groups on the activated carbon surface inhibit the oxidation reaction of cumene. Mechanistic studies indicate that the decomposition of CHP constitutes a key step in the oxidation process of cumene.

Anchoring FeCo2O4 nanoparticles on reduced graphene oxide: optimizing the loading effect for high-performance lithium-ion battery anodes

Xia Xinzhao,Shen Jiangang,Gong Kunkun,Yang Yubo,Zhang Yuxia,Zong Qianying,Wang Shasha,Tian Zhi,Zhao Taolin

Co 3 O 4 exhibits a high theoretical specific capacity and excellent lithium storage performance, making it a promising lithium-ion battery anode. Nonetheless, its high cost, low intrinsic conductivity, and significant volume change during cycling hinder its widespread application. In this study, Co sites in the spinel Co 3 O 4 was partially substituted with eco-friendly and low-cost Fe to form the bimetallic oxide FeCo 2 O 4 . To enhance conductivity and stabilize the oxide material, reduced graphene oxide (RGO) was incorporated to serve as both a conductive matrix and a mechanical buffer, anchoring the FeCo 2 O 4 nanoparticles to mitigate volume expansion/contraction. The uniform dispersion of FeCo 2 O 4 nanoparticles loaded on the layered RGO architecture was achieved through a facile solvothermal method, effectively mitigating nanoparticle agglomeration and RGO restacking. This approach facilitated the orderly arrangement of FeCo 2 O 4 and enhanced the cycling stability of the electrode. Additionally, the high conductivity of RGO provided efficient pathways for ion and electron transport, further boosting the overall electrochemical performance of FeCo 2 O 4 . At an optimal FeCo 2 O 4 /RGO mass ratio of 10:1, the composite demonstrated an initial specific discharge capacity of 1092.4 mAh g − 1 at 0.5 C, significantly outperforming pure FeCo 2 O 4 (859.2 mAh g − 1 ) under the same conditions. The anchoring effect of RGO substantially enhanced the electrochemical performance of FeCo 2 O 4 . This work underscores the efficacy of synergistic composite design and provides a practical approach for developing advanced bimetallic oxide anodes for high-energy-density lithium-ion batteries.

Tyndall-effect-based colorimetric enzyme-linked aptamer assay for instrument-free thrombin detection via enzyme-triggered degradation of MnO2 nanosheets

Hu Jiale,Li Wei,Luo Pei,Nan Yihong,Liu Yimin,Yang Yashi,Zou Jianmei,He Huijun,Zhang Yun

In this work, an innovative Tyndall-effect-based (TE-based) colorimetric strategy was developed to detect the activity of alkaline phosphatase (ALP) via enzyme-triggered degradation of MnO₂ nanosheets (MnO₂ NSs), and it was further extended to construct a TE-based colorimetric enzyme-linked aptamer assay (ELAA) for monitoring thrombin (TB) concentrations. In the presence of ALP, ascorbic acid 2-phosphate (AAP) was hydrolyzed to ascorbic acid (AA), which in turn reduced MnO₂ NSs to Mn 2+ and led to their structural decomposition. Under the irradiation of a handheld laser pointer, the TE signal of the detection solution gradually diminished with increasing ALP concentration. The quantitative measurement of ALP was further achieved using a smartphone to read out the TE signal, with a limit of detection (LOD) of 0.35 mU/mL. Furthermore, this strategy effectively functioned as an exquisite signal generation mechanism to devise a TE-based colorimetric ELAA for TB detection. The results demonstrated that the proposed method exhibited high specificity and sensitivity for TB, capable of linear detection over a concentration range of 1–25 nM with a LOD of 0.38 nM (3σ). In actual human serum samples, the recovery of TB ranged from 93.40 to 109.30%. To our knowledge, this work presents the first TE-based colorimetric ELAA for instrument-free protein analysis by leveraging enzyme-triggered MnO₂ nanosheet degradation. This approach establishes a novel signal transduction mechanism for colorimetric ELAA, thereby offering significant potential to expand the theoretical scope of this assay format and broaden its applications in various resource-limited settings. Graphical abstract

Precision engineering chiral interfaces for efficient spin injection in metal halide heterostructures

Xiao Jin,Li Yang,Liu Yanan,Li Jing,Fang Li,Zheng Haofeng,Wang Yanlong,Liu Qi,Ma Xuyu,Pang Shuai,Hu Jing,Wang Jianbo,Hou Shaocong

Precise control of interfaces is crucial for spin generation, transport, and detection in opto-spintronics. However, the interface engineering for efficient spin injection remains a significant challenge. Here, we synthesized a helical structure of PbI 2 ( R -PbI 2 ) via an interfacial chirality-induced growth approach at the heterostructure interface. This few-nanometer-thick R -PbI 2 layer shows a lower lattice mismatch with both the adjacent R- NEAPbI 3 ( R- NEA refers to R -1-(1-naphtyl)ethylamine) and PbI 2 layers, and leads to an optimal chiral interface in the chiral heterostructure with minimized residual strain and defect density. Combined with circularly polarized pump-probe spectroscopic and spin-photovoltaic measurements, our chiral heterostructure interface contributes a spin-injection efficiency up to 68%, thus leading to a degree of polarization of 29% in photocurrent. The precise synthesis of a chiral interface offers a promising route to manipulate spin dynamics and achieve a high degree of spin polarization required for advanced opto-spintronic applications.

Contrasting effects of three aging processes on arsenic immobilization in red versus black soils amended by cerium-manganese modified biochar: the unique role of freeze–thaw cycling in governing arsenic fate at micro/nano interfaces

Lyu Peng,Huang Xiaoya,Li Lianfang,Jiao Yan

The aging mechanisms of modified biochar for arsenic (As) immobilization at micro/nano-interfacial scales in diverse soils remain poorly understood. Herein, we employed three aging treatments, including natural aging (NA), freeze–thaw cycles (FT), and dry–wet alternation (DW), to simulate the aging behavior of cerium-manganese modified biochar (CMBC) in two As-contaminated field soils. Results indicated that CMBC amendment significantly reduced soil pH by 7.5–16.7%, while simultaneously increasing dissolved organic carbon contents by 10–45%, available phosphorus levels by 11–43%, and the activities of four soil enzymes by 30–320% in comparison to unamended soils. These improvements proved to be most effective under FT-aging, followed by DW-aging and NA-aging. FT-aging also led to the most pronounced reduction in water-soluble As concentrations ranging from 94 to 99%, as well as a decrease in As mobilization coefficients of 38% to 59% in CMBC-amended soils when compared to DW-aging and NA-aging. The superior As immobilization under FT-aging can be attributed to adhesion mediated by Ce–Si crystal nano-bridge between soil microparticles and CMBC matrix, whereas such adhesion was not observed in NA/DW-aged samples. This unique interfacial configuration promoted Ca/Fe-oxide intercalation and amorphous Ce-oxides formation within CMBC, which facilitated the development of As–Fe/Ce crystalline phases. Meanwhile, the synergistic enrichment of metallic and oxygen-containing groups on FT-aged CMBC surface induced the formation of stable As–Ce/Fe–O species and triggered dual redox transformations: (1) Ce/Mn reduction drove bulk As(III) oxidation to As(V), and (2) Fe(0) oxidation mediated partial reduction of As(V)/As(III) to inert As(0). Notably, CMBC-amended red soil exhibited preferential As immobilization during aging due to the tighter adhesion between nano-CMBC and soil colloids. This enhanced adhesion strengthened the bonding of Ce/Fe-oxides with As and intensified the oxidation of As(III) to As(V) through increased Ce/Mn reduction. This study provides innovative microscale mechanistic insights into the aging behavior of modified biochar for remediating diverse soils contaminated with potentially toxic elements. Graphical

An LCA-assisted hierarchical design of radiative cooling coating for full life-cycle CO2 reduction

Cao Ningning,Chi Haowen,Chen Yuxin,Zhu Chen,Liu Tianji,Li Jiabao,Ma Yue,Zhu Bin,Wang Xueyang,Zhao Ke,Wang Zhenyu,Li Wei,Zhao Liang,Guan Dabo,Chen Jun,Zhu Jia

Reducing CO 2 emissions throughout a product’s life cycle, mainly encompassing four stages of raw materials extraction, processing, service, and end of life, is essential for carbon neutrality. Passive daytime radiative cooling coatings offer CO 2 reduction benefits, but primarily only during service stage. Life cycle assessment demonstrates maximized full life-cycle CO 2 reduction requires innovations in both raw materials extraction and service periods. Here, we develop a full life‑cycle carbon‑negative passive daytime radiative cooling coating, achieving 0.571 ~ 13.709 tons of CO 2 -equivalent reduction per ton over its lifespan across all climate zones compared to the commercial reflective cooling baseline, equivalent to planting 32 ~ 762 trees annually. The key to this is sodium dodecyl sulfate-induced hydromagnesite fillers, produced via scalable CO 2 mineral sequestration, which mitigate emissions in raw materials extraction stage. Moreover, the durable polyvinylidene fluoride resin envelops the above fillers with a hierarchical spherical-like structure, providing high optical characteristics and service stability, thus achieving service-stage emissions reduction. This work converges life cycle assessment, material design, and CO 2 mitigation technology, building a powerful platform for carbon-negative radiative cooling coatings and relevant materials, while also inspiring more advancement in sustainable technologies for resilient urban futures.

A universal strategy towards self-healing materials via dynamic interfacial liquid metal coordination

Li Zhiwei,Zhang Yue,Liu Songlin,Lan Jingyu,Peng Yan,Zhang Jiuyang

Self-healing polymer materials, capable of autonomously repairing physical damage, have been broadly applied in modern technologies. In various self-healing systems, metal–ligand coordination bonds have been extensively utilized for their advantages of rich metal–ligand species and functionalities. However, common metal-ligand coordination either has excessively stable bond strengths or is too weak to construct self-healing materials. This work introduces coordination metals into liquid metals (LMs) to form multi-component LMs (mLMs), which creatively leverage the inherent fluidity of mLMs to convert common metal-ligand coordination (e.g., silver-sulfur and zinc/copper-imidazole systems) into reversible interfacial coordination. Such dynamic coordination successfully offers the fantastic self-healing efficiency over 90% for general polymers. Considering the ultra-high thermal conductivity of mLMs, self-healable thermal interface materials (TIMs) are obtained, which successfully address the long-standing challenge of the irreversible damage in long-term used TIMs. The self-healable TIMs can lower the peak temperature of the central processing unit (CPU) by 20 o C under extreme conditions for long time (accumulated 16 hours thermal shock, −10 o C to 100 o C). This work provides a universal strategy for self-healing materials and greatly broadens the investigations of self-healing, coordination chemistry, liquid metal science, soft electronics, and thermal management materials.

Comparison of Freeze-drying and Gradient Dehydration Treatment on X-ray Imaging for Three-dimensional Reconstruction of Early Human Embryonic Brain Samples

Yao Yangqianbo,Hao Wenjie,Wu Shengju,He Qizhi,Xiao Tiqiao,Zhang Zhijun

Preparation of Quaternary Ammonium-Functionalized Chitosan Adsorbent: For the Removal of Reducing Sugar Alkaline Degradation Products

Xia Shiqi,Gao Tongxin,Cui Congli,Bi Chong-hao,Li Dong,Wang Li-jun

Decolorization is critical in sugar refining, where reducing sugar alkaline degradation products (RSADPs) constitute major colorants. Conventional decolorants face limitations including non-renewability, high cost, and narrow applicability. This study developed quaternary ammonium-functionalized chitosan adsorbents (QA) as high-performance and cost-effective alternatives. QA was synthesized via (3-chloro-2-hydroxypropyl) trimethylammonium chloride modification, followed by chemical cross-linking with glutaraldehyde and freeze-drying. QA displayed a more intricate surface morphology with rougher pore walls, while increasing quaternary ammonium-functionalized chitosan (QACS) content contributed to the preservation of the porous framework. Additionally, QA exhibited a stable positive charge (pH 3–11) and industrial-grade thermal stability. Compared to the unmodified chitosan adsorbent, QA exhibited superior adsorption performance and maintained pH-independent functionality, with adsorption capacity increasing with rising QACS content. QA 5 (with 5 wt.% quaternary ammonium-functionalized chitosan) performed optimally, achieving 95.9% RSADPs removal with 172.6 mg/g equilibrium capacity (theoretical max of 287.7 mg/g) and > 15% higher efficiency than unmodified adsorbent. The adsorption kinetics followed the pseudo-second-order model (chemisorption-dominated), and the isotherms fitted the Freundlich model, indicating multilayer heterogeneous adsorption. The QA thus provides an efficient, eco-friendly solution with broad pH tolerance for industrial sugar decolorization.

Cyclic reverse transcription cooperating self-priming cyclic amplification for sensitive and label-free non-small cell lung cancer related microRNA analysis

Chen Lingling,Chen Chen

Non-small cell lung cancer (NSCLC) is a leading cause of global cancer mortality, with a poor five-year survival rate primarily attributed to late diagnosis and therapeutic resistance. Emerging evidence highlights the critical role of microRNAs (miRNAs) in NSCLC pathogenesis, progression, and prognosis. However, conventional polymerase chain reaction (PCR)-based miRNA detection methods often lack sufficient sensitivity and robustness. This study presents a novel, self-assembled bio-sensing platform for the highly sensitive analysis of circulating NSCLC-associated miRNAs. The platform integrates a target-primed hybridization chain reaction (THSP) with cooperative self-primed circular amplification, utilizing a Variable Hairpin Probe (VHP) biosensor coupled with the SYBR Green I fluorescent dye system. Upon specific recognition of target miRNA-21, the system initiates a cascade amplification, minimizing nonspecific background. The activated reaction generates abundant double-stranded DNA products, which bind SYBR Green I to produce a strong fluorescent signal without requiring expensive labeled probes. This straightforward method achieves a detection limit of 1.33 fM, significantly enhancing the sensitivity and practicality. It offers a promising strategy for developing highly specific nucleic acid analysis tools, advancing non-invasive miRNA detection toward precise and personalized NSCLC management.

Metapanax delavayi extract as a neurocutaneous modulator via CRHR1/POMC/MC1R signaling

Zhu Anming,Liu Junxi,Liu Youyun,Xu Rui,Yuan Yonglei,Sun Qiwen,Wang Feifei,Qu Liping

Metapanax delavayi (Franch.) J. Wen & Frodin (Araliaceae) is a plant with both medicinal and edible value, but there is no study examining its effects on skin neurogenic inflammation. We investigated the anti-neurogenic inflammatory and soothing potential of Metapanax delavayi extract (MDE) in vitro using SH-SY5Y cells activated by capsaicin and HaCaT cells stimulated by substance P, and in vivo using a heat-induced zebrafish model. We found that MDE significantly inhibited TRPV1 activation and intracellular calcium influx, down-regulated neuropeptides (CGRP, NGF, substance P) and proinflammatory cytokines (IL-1α, IL-6, IL-8), and regulated emotion-related hormones (decreased cortisol, increased β-endorphin). It also reduced heat-induced hypermotility in zebrafish. Critically, the mechanistic study suggests that biological activity may be associated with the inactivation of the CRHR1/POMC/MC1R signaling pathway. Collectively, these findings indicate that MDE possesses significant potential as a natural skincare ingredient for counteracting neurogenic inflammation associated with sensitive skin.