查找使用阿拉丁产品的科研文献

Significantly reduced lattice thermal conductivity and enhanced thermoelectric performance of In2O3(ZnO)3 ceramics by Ga2O3 doping

Lulu Huang,Jun Guo,Zhen-Hua Ge,Yehua Jiang,Jing Feng

The In 2 O 3 (ZnO) 3 + x mol%Ga 2 O 3 ( x  = 0, 0.1, 0.3, 0.5, 1) ceramics were synthesized by a solid-state reaction process. The effect of Ga doping on the thermoelectric properties of the In 2 O 3 (ZnO) 3 ceramics was studied. The phase structure and microstructure of all the bulk samples were checked by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. Additionally, the minimum thermal conductivity of 1.45 Wm −1 K −1  at 973 K is obtained for 0.5% Ga-doped sample, which is 35% lower than that of the pristine sample. The significantly decreased thermal conductivity for Ga 2 O 3 -doped sample is due to the enhanced scattering of phonons , which is derives from the point defects caused by Ga-doping and the introduction of the second phase. As a result, the In 2 O 3 (ZnO) 3 +0.5 mol% Ga 2 O 3 sample achieved the highest ZT value of 0.23 at 973 K.

High-Safety Symmetric Sodium-Ion Batteries Based on Nonflammable Phosphate Electrolyte and Double Na3V2(PO4)3 Electrodes

Xingwei Liu,Xiaoyu Jiang,Faping Zhong,Xiangming Feng,Weihua Chen,Xinping Ai,Hanxi Yang,Yuliang Cao

Sodium-ion batteries (SIBs) have been viewed as a promising candidate for grid-scale energy storage systems owing to their low cost and abundant Na resources. However, insufficient safety and poor cycling performance of current SIBs are hampering their implementation. Herein, we develop a symmetric SIB by employing Na3V2(PO4)3 as both cathode and anode along with the nonflammable triethyl phosphate dissolving 0.9 M NaClO4 as the electrolyte. The symmetric SIB demonstrates a superior rate capability (35.1 mA h g–1 at 32 C) and excellent cycling performance with a capacity retention of 88.9% after 500 cycles at 2 C. This work demonstrates a new avenue to construct safe and long-cycle-life SIBs with a simple electrode manufacturing process.

Ion-Unquenchable and Thermally “On–Off” Reversible Room Temperature Phosphorescence of 3-Bromoquinoline Induced by Supramolecular Gels

Hong Wang,Hao Wang,Xiaoqiong Yang,Qin Wang,Yajiang Yang

Ion-unquenchable and thermally on–off reversible room temperature phosphorescence (RTP) can be induced by entrapping 3-bromoquinoline (3-BrQ) into supramolecular gels formed by the self-assembly of a sorbitol derivative (DBS). In comparison with conventional substrates inducing RTP, the gel state 3-BrQ/DBS can produce strong RTP due to the efficient restriction of the vibration of 3-BrQ. Notably, the rather inconvenient deoxygenation is no longer necessary in the preparation of 3-BrQ/DBS gels. The produced RTP was found to be very fast to reach stable, not depending on the standing time. As a reference, in the liquid state of 3-BrQ/sodium deoxycholate (NaDC), stable RTP can be observed after standing for 5 h. The investigation of RTP quenching indicates that the mechanism of RTP induced by DBS gels mainly involves the microenvironment in which 3-BrQ is located. 3-BrQ was entrapped in the hydrophobic 3D network structure of DBS gels, thereby restricting the motion and collision of 3-BrQ and avoiding RTP quenching and additionally quenching by ions. Furthermore, the RTP of 3-BrQ/DBS gels show an excellent “on–off” effect at 10 or 80 °C. This indicates that the solid DBS gel is beneficial for the preparation of RTP sensor devices.

A first newly isolated strain capable of effectively degrading 3-methylpentane: Identification, degradation characteristics and pathway analysis

Qian Li,Yujing Zhao,Liqin Sun,Zhonghui Sun,Raquel Lebrero,Raúl Muñoz,Jianmeng Chen,Rongsheng Lin,Dongzhi Chen

Biotechnology is applicable for the treatment of volatile organic compounds emitted from petrochemical industries. However, the biodegradation of methyl alkanes is limited by low microbial activity and poor mass transfer. Herein, a novel strain capable of effectively utilizing 3-methylpentane (3MP) as the sole carbon source was firstly isolated and identified as Mycobacterium sp. SLQ-1. The strain could function well within wide ranges of pH (5.0-8.0) and temperature (30-45℃), with the maximum specific growth and biodegradation rates being 0.084 and 0.587   h -1 , respectively. The optimum function conditions (pH 6.9, temperature 36.2℃) and 3MP removal efficiencies were predicted via response surface analysis. The repeated recycling of 2-methyl silicone oil enhanced 3MP biodegradation due to microbial adsorption. Two possible 3MP biodegradation pathways were proposed based on the analysis of metabolic intermediates, genes and enzymes. Furthermore, the strain had a wide utilization spectrum toward various alkanes, olefins and aromatics, presenting great engineering application potential.

A novel bicyclic peptide-drug conjugate of 3-fluoro-10-hydroxy-evodiamine for targeted colorectal cancer therapy

Siyuan Zhao,Chang Chu,Cuiping Li,Qiaoli Zhai,Juan Liu,Huan Sun,Xin Wu,Kourong Shi,Wei Fan

This study aimed to develop a novel peptide–drug conjugate (PDC) by conjugating 3-fluoro-10-hydroxy-evodiamine (FOE) with a bicyclic peptide (BiP) targeting the EphA2 receptor. The goal was to enhance the solubility, tumor selectivity, and therapeutic efficacy of FOE against colorectal cancer (CRC). FOE and BiP were chemically synthesized and coupled through a valine–citrulline cleavable linker to generate BiP–FOE. The compound was structurally characterized, and its solubility, plasma stability, and in vitro cytotoxicity were evaluated in CRC cells. Its effects on cell migration, invasion, apoptosis, and the cell cycle were also assessed. The in vivo targeting ability, antitumor efficacy, and safety were evaluated in an HCT116 xenograft mouse model. BiP–FOE exhibited a greater than 200-fold improvement in aqueous solubility and good metabolic stability. In vitro, BiP–FOE showed selective and potent cytotoxicity toward EphA2-positive HCT116 cells, significantly inhibiting migration and invasion while inducing S-phase arrest and apoptosis. In vivo, BiP–FOE achieved significant accumulation at the tumor site and effectively suppressed tumor growth, with efficacy comparable to or exceeding that of 5-FU. It demonstrated a favorable safety profile, showing minimal body weight loss, negligible hemolysis, and no detectable organ toxicity. BiP–FOE successfully combines the cytotoxic potential of FOE with the tumor-targeting capacity of a bicyclic peptide, resulting in improved solubility, selectivity, efficacy, and safety. These findings highlight BiP–FOE as a promising candidate for targeted CRC therapy and warrant further preclinical development.

A simple self-corrosion method constructs the Ni 3 S 2 @FeOOH heterostructure enables industrialized seawater oxidation

Yujie Yuan,Ziyu Yang,Hao Wang,Tong Wu,Xiaoyi Zhang,Lin Chen,Zhaohuan Wei,Rui Wang,C. Venkata Reddy,Jaesool Shim,Hui Tang

Electrocatalytic seawater splitting holds immense promise as a green hydrogen production technology; however, the anodic oxygen evolution reaction (OER) confronts formidable challenges arising from the high concentration of chloride ions (Cl -) and other impurities in seawater. Herein, we develop a facile two-step immersion corrosion strategy to successfully construct a Ni 3 S 2 @FeOOH heterojunction electrocatalyst on nickel foam (NF) tailored for industrial alkaline seawater oxidation. Integrating density functional theory (DFT) calculations and experimental characterizations, we demonstrate that Ni 3 S 2 @FeOOH selectively enriches OH -while repelling Cl -during OER in alkaline seawater electrolytes. Notably, in situ leaching of SO 4 2-from the electrode triggers efficient self-reconstruction, facilitating the generation of high-valence metal active sites. The asfabricated catalyst exhibits remarkable OER performance with a low overpotential of 390.5 mV at an ultrahigh current density of 1000 mA cm -2 in alkaline seawater. Moreover, it maintains exceptional electrochemical stability for over 1000 hours at the industrial current density of 1000 mA cm -2 . This work provides a scalable strategy for constructing self-reconstructing electrocatalysts that promote highvalence metal site formation and efficient Cl -repulsion in alkaline seawater oxidation.

Lattice-homogenized Br/I alloyed CsPb(Br/I)3 red quantum dots for wide-color-gamut WLEDs

Siyu Qin,Yanzhao Liu,Zhanghan Qin,Yi Zhu,Yulong Zhao,Meirong Sui,Feng Tong,Xiuquan Gu

All-inorganic red-emitting CsPbI 3 perovskite quantum dots (PQDs) suffer from cubic-phase instability and iodide ion migration, causing phase separation and emission quenching. This work demonstrates that lattice-level Br/I homogenization is essential for stable red emission, rather than physical blending or surface doping. Through systematic compositional screening of CsPb(Br/I) 3 solid solutions, CsPbBr 1 I 2 is identified as the optimal composition, delivering pure emission at 640 nm. Br incorporation strengthens Pb–Br bonds, passivates halide vacancies, and synergistically suppresses phase transitions and ion migration. As a result, CsPbBr 1 I 2 PQDs exhibit an ultralong fluorescence lifetime of 288 ns and retain over 70% of initial photoluminescence (PL) intensity under combined heat, water immersion, and light stresses, whereas control samples retain only 30−40%. A prototype white light-emitting diode (WLED) backlight display fabricated with these PQDs achieves a color gamut covering 127.07% NTSC and 94.88% Rec.2020, delivering vivid, saturated colors. This work provides a reliable compositional regulation strategy and theoretical foundation for perovskite-based wide-color-gamut displays.

Assessment of p-Xylene Migration Behaviour in Unsaturated Soil Systems: A 3-D Sand Flow Chamber Study

The influence of soil water content and contaminant injection pressure on the migration behaviour of p-Xylene (one of the organic pollutants in Benzene Toluene Ethylbenzene & Xylene) is investigated in the unsaturated zone using the controlled laboratory sandbox experiments. The results show that, at equivalent migration distances, higher soil water content leads to longer migration durations and reduces transport velocities, whereas greater injection pressure promotes faster contaminant movement. These findings highlight the governing role of water saturation in the water–oil–gas three-phase system, in which increased water content decreases the relative permeability of the oil phase and retards capillary-driven BTEX transport. Unlike many previous studies in which contaminants commonly migrate downward toward the groundwater table, the BTEX in this study did not reach the water table and exhibited partial upward migration. Overall, the results provide experimental-scale insight into key mechanisms governing BTEX transport in unsaturated sandy media and serve as a reference for improving predictions of contaminant fate and migration pathways in field settings.

Oxygen-Vacancy-Rich Na1.3Ti1.8Ni0.1Sb0.1(PO4)3@C Anode for High-Rate and Low-Temperature Sodium-Ion Storage

He Yixin,Wang Yida,Zeng Sihan,Si Juntao,Li Yuexin,wang Rui,Zhang Cheng,Chen Chunhua

NASICON-type NaTi 2 (PO 4 ) 3 as an electrode material for sodium-ion batteries has attracted considerable attention due to its high structural stability and safety, yet its low intrinsic electronic conductivity limits high-rate and low-temperature performance. In this work, an oxygen-vacancy-rich Na 1.3 Ti 1.8 Ni 0.1 Sb 0.1 (PO 4 ) 3 @C (N 1.3 T 1.8 N 0.1 S 0.1 P@C) nanopowder as a high-performance anode material is synthesized by a solvothermal method. The Ni 2+ /Sb 5+ co-doping effectively modulates the local TiO 6 /PO 4 lattice environment, introduces oxygen vacancies, and optimizes the lattice electronic structure, enhancing both electron and ion transport. A continuous carbon coating forms a stable conductive network, further improving kinetics and structural integrity. As a result, Na∥N 1.3 T 1.8 N 0.1 S 0.1 P@C half-cells retain 91% of their capacity after 5000 cycles at 20 C and maintain 86% capacity over 10,000 cycles at 10 C under 0 ° C. The full cell paired with Na 3 V 2 (PO 4 ) 3 cathodes exhibits 87% capacity retention after 1000 cycles at 5 C and delivers excellent performance even at 50 C without pre-sodiation, highlighting their potential for low-temperature applications. This study provides a general doping-defect engineering strategy for NASICON-type anodes, enabling high-rate, low-temperature, and long-cycle performance for sodium-ion batteries.

A synergistic nanotherapy for skin photoaging via self-assembly of epigallocatechin-3-gallate and recombinant human collagen

Xia Huan,Huang Rufei,Wu Qihong,Tang Xun,Meng Tao,Fan Yufei,Li Ziyi,Zhang Jinping,Huang Yadong,Yang Yan

UV-induced skin photoaging is a complex pathology driven by oxidative stress and extracellular matrix (ECM) depletion. Although recombinant human collagen (RHC) and epigallocatechin-3-gallate (EGCG) address these mechanisms, their synergy is limited by RHC’ s poor permeability and EGCG’ s instability. Here, we present a supramolecular co-assembly strategy to overcome these barriers. Validated by molecular dynamics simulations, we utilized the intrinsic proline-rich domains of RHC as anchors for EGCG to construct uniform nanospheres (< 100 nm). This architecture sterically shields EGCG, significantly enhancing stability and reducing cytotoxicity. Biologically, the nanospheres restored mitochondrial membrane potential and promoted anti-inflammatory M2 macrophage polarization. In a photoaging mouse model, the nanospheres outperformed monotherapies, effectively reversing epidermal hyperplasia and restoring the Type I/III collagen ratio. This study resolves the delivery-stability paradox of protein–polyphenol therapeutics, offering a potent strategy for regenerating photodamaged skin. Graphical

[Co(bpy)3]2+ sensitized Bi2WO6/CdS photocatalyst to enhance synergistic levofloxacin degradation with simultaneous H2 production

Hengyi Wang,Yong-Fei Li,Xueli Niu,Peiyun Dai,Mingyu Dou,Guang Yang,Fatao Gong,Hongjie Zhu,Hua Yang,Jianmin Dou

Due to the consumption of traditional fossil fuels, human society faces global energy shortages and increasing environmental pollution problems. To address water pollution caused by the abuse of antibiotics and to promote green hydrogen production. In this paper, a Bi 2 WO 6 /CdS S-scheme heterojunction was prepared to realize the photocatalytic levofloxacin (LEV) degradation coupled with hydrogen production reaction. Under the introduction of [Co(bpy) 3 Cl 2 ] (CoBpy) as a molecular photosensitizer, the hydrogen production activity of Bi 2 WO 6 /CdS increased remarkably to 5395.9 μmol g −1  h −1 , meanwhile, the degradation rate of LEV could reach 87.5 %, which was much higher than that of the pure phase material and exhibited excellent stability over five cycles. The enhanced photocatalytic activity originates from the S-scheme heterojunction mechanism that enables the oxidizing and reducing abilities of the material to be fully exploited, meanwhile the sensitization of CoBpy further optimizes the charge transfer pathway, which realizes the combination of visible-light-driven wastewater treatment and green hydrogen production. Our findings provide an efficient and safe approach to environmental remediation and green energy production for a sustainable energy future.

Enhanced negative thermal expansion property in (KMg)xSc2-x(WO4)3 ceramics synthesized by solid–state reaction

Zhiping Zhang,Yuenan Wang,Yang Lei,Fang Zhang,Xiaobing Chen,Hongfei Liu

Negative thermally expanded (NTE) (KMg) x Sc 2-x (WO 4 ) 3 (0 = x ≤ 1.5) ceramics have been prepared via solid-state reaction. X-ray diffraction (XRD) analysis reveals that (KMg) x Sc 2-x (WO 4 ) 3 undergoes a composition-induced phase transition as the (KMg) 3+ -substitution content increases. For x = 0.25, both hexagonal (KMg) x Sc 2-x (WO 4 ) 3 and orthorhombic Sc 2 (WO 4 ) 3 coexisted in the sample. For 0.25 < x ≤ 1, a single-phase, hexagonal (KMg) x Sc 2-x (WO 4 ) 3 , was obtained. When x is further increased to 1.25, monoclinic MgWO 4 impurity was detected in the sample. Meanwhile, as x increases, the grain size of (KMg) x Sc 2-x (WO 4 ) 3 ceramics grows up. Hexagonal (KMg) x Sc 2-x (WO 4 ) 3 ceramics show high densification and strong NTE property. Thermomechanical analysis indicates that the linear coefficients of thermal expansion (CTEs) of hexagonal (KMg) x Sc 2-x (WO 4 ) 3 ceramics decrease from −7.48 × 10 −6  °C −1 to −14.06 × 10 −6  °C −1 with the increase of x. High-temperature XRD analysis reveals that hexagonal (KMg) 0.5 Sc 1.5 (WO 4 ) 3 show an anisotropic NTE. The intrinsic linear CTEs are α a  = α b  = −6.74 × 10 −6  °C −1 , α c  = 11.03 × 10 −6  °C −1 and the volumetric CTE is α v  = −2.52 × 10 −6  °C −1 .