查找使用阿拉丁产品的科研文献

Electron-enriched Co-Eu-B nanoclusters confined in mesoporous Al2O3 enable ultrafast room-temperature NaBH4 hydrolysis

Kai Xu,Ruoyin Luo,Mingen Wu,Yi Xu,Chenggen Li,Ming Yang,Yuan Dong

Amorphous Co-Eu-B nanoclusters confined in mesoporous Al 2 O 3 were fabricated by an impregnation–chemical-reduction route. Their hydrogen-evolution performance during NaBH 4 hydrolysis was benchmarked against Co-B and Eu-modified Co-B analogues. Structure-activity correlations reveal a three-fold synergy. Geometric confinement by the Al 2 O 3 scaffold prevents nanoparticle agglomeration. Mixed-valent Eu 3+ /Eu 2+ injects electrons into Co via concurrent B → Co and Eu → Co pathways, generating an electron-rich Co δ− core. The Eu-Al-O interface markedly increases Lewis-acid site density, facilitating H 2 O polarization and B-H bond cleavage. Owing to this coupling, the optimised Co-Eu-B/Al 2 O 3 catalyst (Eu/Co = 0.17) delivers a peak hydrogen-generation rate of 2987.81 mL min −1 g −1 at 30 °C, lowers the apparent activation energy to 39.21 kJ mol −1 , and retains full activity over five consecutive cycles-outperforming previously reported Co-based systems. The study elucidates, for the first time, how rare-earth dopants and support engineering co-operate through structural, electronic and acid–base regulation, providing a transferable blueprint for low-cost, highly active and durable hydrolysis catalysts suitable for portable fuel cells and distributed hydrogen technologies.

Engineered aluminum doping on VO2(B) as high-performance cathode materials for aqueous zinc-ion batteries

Xuezhen Zhai,Xiaohong Chen,Ruihan Li,Lamei Zhang,Xuzhe Wang,Cui Shang,Chengzhou Zhao,Huawei Zhang,Jimin Shang,Dewei Liu

VO 2 (B) has emerged as a promising cathode candidate for aqueous zinc-ion batteries (ZIBs) due to its unique tunnel-structured framework that facilitates zinc ion transport. Nevertheless, practical implementation faces challenges including limited coulombic efficiency, inadequate cycling stability, and restricted rate capability, primarily attributed to poor electrical conductivity and strong Zn 2+ interionic repulsion. In this work, Al 3+ is selectively incorporated into VO 2 (B) and induced structural optimization in Al x V 1- x O 2 (B), where controlled lattice contraction and electronic structure modification near the Fermi level. Aluminum doping induces 3D morphology that enhances ion diffusion pathways and electrolyte interaction. The engineered material exhibits enhanced electrochemical kinetics through oxygen vacancy formation (providing active sites) and substantially improved pseudo-capacitive charge storage. The optimized Al 0.05 V 0.95 O 2 (B) cathode achieves a remarkable specific capacity of 364.7 mA·h·g −1 at 0.1 A/g, while maintaining 91.64 % capacity retention after 2000 cycles under high-current operation (5.0 A/g), demonstrating superior electrochemical stability.

Photocatalytic degradation of aqueous rhodamine B by TiO2/ZnO/rGO nanocomposite: photocatalytic activity and catalytic mechanism

Lu Peng,Peng Nian,Jingwei Feng,Xiangxiang Han,Binhua Cui,Songsheng Lu,Jie Zhang,Chenming Li,Aiyong Zhang

The present study evaluated fabrication of bioactivated carbon (BAC) from waste activated sludge (WAS) for methyl tert-butyl ether (MTBE) removal from aqueous solution. BACs were prepared using KOH, H 3 PO 4 , and ZnCl 2 as chemical activation reagents, followed by thermal activation. Batch experiments with different BAC types and dosages, solution pH, initial MTBE concentrations, and contact times were conducted to investigate the BAC effectiveness. The obtained data were analyzed using the kinetics and isotherm model and also with artificial neural network (ANN). The result of Fourier transform infrared (FTIR) spectra of WAS and BAC was depicted that the C–H and C–C were major surface functional groups. The ZnCl 2 activated carbon had the highest adsorption capacity for MTBE adsorption, followed by H 3 PO 4 and KOH activated carbons. The results showed that the highest MTBE removal was observed at solution pH equal to 4 and approximately 30% of MTBE could be adsorbed with 30 min contact time. It was also found that MTBE adsorption followed the R–P isotherm and pseudo-second order (type 1) kinetic models. During ANN modeling, the optimum neurons number for Levenberg–Marquardt training algorithm was determined equal to 5 with highest R 2 value and lowest mean square error were found to be 0.99 and 5.7 × 10 –4 , respectively.

Ultralong TiO2 (B) Nanowires/TiO2 Nanoparticles Composites for Rapid Electron Transport in Dye-Sensitized Solar Cells

Guo Min,Yang Lu,Chen Jia,Zhang Jun,Su Haijun,Liu Lin,Xie Keyu

The relatively small electron diffusion coefficient and high charge recombination rate of TiO2 nanoparticle (NP) film limit charge collection in TiO2 NP based dye-sensitized solar cells (DSSCs). Herein, ultralong bending TiO2 (B) nanowires (NWs) were introduced to TiO2 NP photoanode and expected to modify electron transport of DSSCs. The TiO2 (B) NWs/TiO2 NP composite structure was prepared by a facial process combining the stirring hydrothermal method with mechanical mixing method. When the composite structure was applied to DSSCs, the rapid electron transport pathway was formed in photoanode, which was clarified by the small electron transport resistance and long electron diffusion length, improving the charge collection efficiency. Moreover, the scattering effect of TiO2 (B) NWs could enhance the light harvesting, and thus improve the power conversion efficiency (PCE) of DSSCs. The excellent electronic and optical characteristics of TiO2 (B) NWs yield the maximum enhancement of PCE (36.4%) when 50% (wt.%) TiO2 (B) NWs was integrated into TiO2 NP based DSSC. The work provides new insights into the design and tailoring nanowires to enhance the PCE of DSSCs for practical applications.

Improved electrochemical performance of nitrogen doped TiO2-B nanowires as anode materials for Li-ion batteries

Yongquan Zhang,Qiang Fu,Qiaoling Xu,Xiao Yan,Rongyu Zhang,Zhendong Guo,Fei Du,Yingjin Wei,Dong Zhang,Gang Chen

N-doped TiO2-B nanowires are prepared by the solvothermal method using TiN nanoparticles as the starting material. X-ray photoelectron spectroscopy shows that the N dopants preferentially occupy the interstitial sites of TiO2-B up to a content of ∼0.55 at%. Above this critical value, the N dopants will substitute the oxygen atoms which improve the electronic conductivity of TiO2-B. The maximum proportion of substituted-N in the TiO2-B nanowires is ∼1.3 at%. Raman scattering shows that the substituted-N strengthens the Ti(1)–O1–Ti(2) and O1–Ti(1)–O3 bonds of TiO2-B. This improves the stability of the corresponding local structures, thus reducing the distortion of the Li+ diffusion channel along the b-axis of TiO2-B. As a result, the substituted-N has more of an impact on the electrochemical properties of TiO2-B than the interstitial-N does. The TiO2-B nanowires containing substituted-N dopants exhibit a remarkably enhanced electrochemical performance compared to pure TiO2-B. They show a discharge capacity of 153 mA h g−1 at the 20 C rate with a capacity retention of 76% after 1000 cycles. In addition, they can deliver a discharge capacity of 100 mA h g−1 at an ultra-high rate of 100 C, indicating their great potential in high power lithium ion batteries.

High performance of the linked visible photoinitiator for free radical polymerization based on erythrosine B derivative

Xuying Nan,Yi Huang,Qinguo Fan,Jianzhong Shao

A novel erythrosine B derivative linked with a tertiary amine used as a visible light initiator for free radical polymerization was synthesized and characterized. For comparison, the free hydrophobic erythrosine B derivative was also synthesized and its combination with the tertiary amine was used as the separated two component photoinitiator. The linked initiator exhibited higher photoinitiator efficiency in high viscosity monomer than in low viscosity one, compared with the separated counterpart. Especially, when it was combined with iodonium salt, the further promotion of the photoinitiator efficiency was observed, compared with the separated three component system. It was found that as iodonium salt together with tertiary amine was continuously added to the formula with the linked initiator, the photoinitiator efficiency was dramatically enhanced compared with the same addition to the formula with the separated counterpart, revealing the application potential of the linked initiator. And the continuous addition of either the iodium salt or the tertiary amine to the formula only leaded to the small size increase of the photoinitiator efficiency. These results suggested that there existed an interdependent relationship between iodonium salt and tertiary amine in promoting the photoinitiator efficiency of the dye/amine/iodonium salt system. For these, the corresponding synergistic mechanism was proposed. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42361.

Fabrication of high-sensitivity Bi0.2-xCexSr0.5La0.3TiO3 (0

CRISPR/Cas9-mediated myostatin b knockout enhances growth performance and muscle hypertrophy in grass carp (Ctenopharyngodon idella)

Tianyang Sun,Xinzhan Meng,Yaru Li,Hongquan Zhang,Ruitao He,Ruicong He,Tiegang Liu,Wenyao Lv,Xiaoyan Xu,Yubang Shen,Jianfeng Ren,Jiale Li

Aquaculture is critical for global food security, yet genetic improvement in farmed fish has progressed more slowly than in terrestrial livestock. Myostatin (MSTN), a conserved negative regulator of skeletal muscle growth in vertebrates, presents a prime target for enhancing aquaculture productivity. In this study, we employed CRISPR/Cas9 ribonucleoprotein (RNP) complexes to disrupt mstnb , the orthologous gene of livestock mstn , in grass carp ( Ctenopharyngodon idella ), the most economically important freshwater aquaculture species in China. Co-injection of five single-guide RNAs (sgRNAs) targeting mstnb exon 1 with Cas9 protein into single-cell embryos achieved 62.0–97.8 % editing efficiency in F 0 mosaic individuals, with an overall population efficiency of 67.1 %. At 7 months post-hatching, mstnb -knockout (KO) fish displayed 17.5 % greater body weight, 8.8 % increased body width, and 7.6 % higher body height compared to control siblings. Histological analysis revealed marked muscle fiber hypertrophy, with cross-sectional area increases of 9.0–26.3 % in cephalosome, trunk, and rump muscles. KO fish also displayed reduced hepatic lipid and glycogen accumulation, indicative of improved metabolic efficiency. While muscle amino acid composition remained largely unchanged, we observed a modest decrease in ω-3 polyunsaturated fatty acids (e.g., EPA and DHA). This study marks the first successful application of CRISPR/Cas9 in grass carp, demonstrating that mstnb disruption enhances growth and muscle development without substantially compromising meat quality. Our results underscore the potential of genome editing for sustainable aquaculture breeding, offering a promising strategy to address rising global protein demands.

Combination of B-AP15 and HSP90 inhibitor tanespimycin induces ROS-mediated cytotoxicity in human lung cancer cells

Fu Wenying,Lu Hui,Yan Ying,Shu Chongchong,Xu Chenxin,Chen Yinghua,Xia Yiqun,Chen Jundixia,Chen Yunzhi,Zou Peng,Cui Ri,Ni Daoyong

Section Background Lung cancer continues to rank as a leading cause of cancer-related mortality worldwide. Despite notable advances in medical research, therapeutic options for advanced-stage lung cancer remain inadequate. Heat shock protein 90 (HSP90) has been identified as a potential therapeutic target in multiple malignancies, such as lung and colon cancers, owing to its pivotal role in stabilizing numerous oncoproteins. Nonetheless, the clinical application of HSP90 inhibitors has faced challenges, including suboptimal efficacy and the development of resistance mechanisms. B-AP15 is a promising small molecule in cancer therapy that functions by inhibiting deubiquitinating enzymes, which regulate protein degradation through the proteasome pathway. In this study, we aim to investigate its combinatorial activity with the HSP90 inhibitor tanespimycin (TAU) in lung cancer cells. Section Methods The levels of the specified molecules were measured by Western blot analysis. Reactive oxygen species (ROS) levels were determined using the 2′,7′-dichlorodihydrofluorescein diacetate (DCFH-DA) probe. 53BP1 foci formation and C/EBP homologous protein (CHOP) expression were assessed by immunofluorescence. Autophagic flux was monitored using mRFP-GFP-tagged microtubule-associated protein 1 light chain 3 (LC3) lentivirus. Section Results Our findings reveal that the combination of TAU and B-AP15 induces significant synergistic antitumor effects, characterized by substantial accumulation of ROS. This ROS accumulation serves as a crucial mediator of the enhanced therapeutic response elicited by the combination treatment. Mechanistic analyses further demonstrated that the combined treatment induces cell death via activation of endoplasmic reticulum (ER) stress and the c-Jun N-terminal kinase (JNK) pathway. Section Conclusion In summary, our study provides robust evidence supporting the potential of combining TAU with B-AP15 as a viable therapeutic option for lung cancer treatment.

Composition engineering of short-range-ordered polyhedra in Ni-Mo-P-B metallic glass for electrochemical sensing

Zhongzheng Yao,He Zhu,Yu Lou,Fan Xue,Jingqian Huang,Hua Ji,Wei-Di Liu,Xindong Zhu,Sinan Liu,Jianrong Zeng,Yang Ren,Xun-Li Wang,Yang Lu,Si Lan

Metallic glasses (MGs), despite exhibiting superior electrochemical catalytic and sensing activity to crystalline solids, remain difficult to rationally design because the structural units that directly correlate to active sites are poorly resolved. Here, we address this challenge by showing that a small change in Ni content (±4 at%) in Ni-Mo-P-B MGs gives precise control of short‑range-ordered (SRO) polyhedral motifs and their medium‑range connections. Synchrotron X-ray analysis reveals that the Ni 64 Mo 16 P 16 B 4 (Ni 64 ) stabilizes ten-coordinated (Z10) bi-capped square archimedean antiprisms (BSAPs) as the dominant SRO polyhedral, whereas Ni 60 Mo 20 P 16 B 4 (Ni 60 ) and Ni 68 Mo 12 P 16 B 4 (Ni 68 ) are dominated by nine-coordinate (Z9) tricapped trigonal prisms (TTPs). Crucially, this engineered SRO dramatically enhances the electrochemical glucose sensing: Ni 64 delivers ultrahigh sensitivity, a wide linear range, and stable operation over seven days, whose performance is far superior to conventional crystalline probes. First-principles calculations reveal that only at a Ni/Mo ratio of 4 does short-range chemical ordering favor the highly symmetric Z10 BSAPs with two Mo atoms occupying the two polyhedral caps. These Mo‑capped Z10 clusters optimally modulate Mo-Ni electronic interactions, lowering the *OH adsorption barrier and boosting catalytic reactivity. A miniaturized glucose sensor was fabricated by integrated the MG with a screen-printed electrode, demonstrating the practical applicability. Notably, we found that the dominant polyhedra show homology to local building blocks of nearby crystalline phases, suggesting that amorphous structures inherit crystal-like motifs that govern both stability and properties. Our work establishes an atomic-scale structural engineering paradigm for MG design, bridging crystalline-amorphous structural homology with functional optimization, and deepening the understanding of structure–property correlations in MG systems.

A novel lightweight ceramizable Si–B hybrid phenolic aerogel composite with excellent thermal insulation and ablation resistance

Jie Ding,Xiaolong Chen,Degang Wang,Qin Wang,Yanqiang Wei,Tianhao Yuan,Tengfei Wu,Yuzhe Ma,Mengyuan Du,Kang Yang

Lightweight phenolic aerogel composites represent a crucial component of future thermal protection systems in aerospace applications. Multifunctional hybrid modification is considered an effective method to enhance the thermal stability and ablation resistance of phenolic aerogel composites. In this study, silicone and boric acid were crosslinked with phenolic resin (SiBRx) to introduce high-bond-energy Si–O and B–O bonds. Subsequently, the SiBRx can be used to prepare a lightweight aerogel by the sol–gel method. The specific surface area of the SiBRx aerogel reached 180.25 m2 g−1, representing a 59% increase compared to the unmodified phenolic resin (PR) aerogel. Furthermore, the SiBRx aerogel exhibited superior thermal stability, with a maximum decomposition temperature of 603.2 °C, 12% higher than that of the PR aerogel. Quartz fiber-reinforced phenolic aerogel composites (QF/SiBRx) were fabricated by incorporating quartz fiber mats and varying the content of the curing agent hexamethylenetetramine (HMTA). At a HMTA content of 15%, the QF/SiBR15% aerogel composite achieved a bending strength of 14.17 MPa, with compressive strength increasing from 9.99 MPa to 12.26 MPa. Moreover, the QF/SiBRx composites demonstrated outstanding ablation resistance, with a remarkably low linear ablation rate of 0.077 mm s−1. The incorporation of Si and B forms a dense composite ceramic layer (C, SiO2, and B2O3) on the ablated surface, preventing pyrolytic degradation of the material structure and enhancing ablation resistance.

Oxygen barrier behavior and mechanism of Zr-Si-B-O biomimetic glass film for ZrB2-SiC coating

Peipei Wang,Guozheng Lv,Xiang Ji,Sheng Zhang,Yuhang Bai,Huan Luo,Yuhao Wu,Xing Zhao,Zhaoqi Hou,Peizhong Feng,Xuanru Ren

To reduce the oxidation damage during the initial active oxidation stage of ZrB 2 -SiC coating, this paper employed a slurry-brushing method to prepare a self-healing Zr-Si-B-O biomimetic glass film on the surface of the ZrB 2 -SiC coating. Furthermore, the oxidation resistance behavior of biomimetic glass films with varying ZrO 2 contents was investigated. Experimental results indicate that the Zr-Si-B-O biomimetic glass film can significantly reduce the oxidation weight gain of ZrB 2 -SiC coating. The biomimetic glass film sample with 70 wt% ZrO 2 exhibits the best oxidation protection effect. After oxidation treatment in the temperature range of 600-1600 °C, the weight gain is only 0.081 × 10 −2  g cm −2 , which is 95.35% lower than that of the sample without the biomimetic glass film; after oxidation at 1700 °C, the final protection efficiency and average carbon loss rate reach the optimal values of 99.97% and 0.34 × 10 −6  g cm −2  s −1 , respectively, and the average oxygen permeability is only 0.35%. The presence of Zr-Si-B-O biomimetic glass film can significantly reduce the oxidation activity and improve the oxidation resistance of the coating. This is attributed to the pre-introduction of a flowable and self-healing glass on the coating surface, which prevented the intense oxidation of the coating at the initial stage.