JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Lu Luo,Jianping Deng,Qianqian Zhang,Yuling Lan,Guanben Du,Mizi Fan,Weigang Zhao
B/N co-doped porous carbons (BNCs) with abundant micropores were developed by a microwave-introduced heating and activator-free strategy. The thermal decomposition of the dopant NH 4 B 5 O 8 ·4 H 2 O) creates well-developed micropore architecture in BNC-180, achieving a remarkable specific surface area of 891 m 2 g −1 and a pore volume of 0.46 cm 3 g −1 , significantly surpassing the non-doped sample C-180 (605 m 2 g −1 ). Additionally, incorporating high levels of B and N into the carbon skeleton modified the functional group species and electron distribution, enhanced electrical conductivity, and boosted electrochemical performance. Compared with C-180 (93.0 F g −1 ), the as-prepared BNC-180 manifests a specific capacitance of 219.0 F g −1 at 0.5 A g −1 in a three-electrode configuration with a striking rate performance of 83.8 % at 10 A g −1 , implying that the porosity and surface chemical functional groups play a crucial role. Furthermore, the as-built symmetric supercapacitor shows a pronounced energy density of 13.4 Wh kg −1 at 375 W kg −1 , and still remained 10 Wh kg −1 at 7500 W kg −1 . The excellent durability was demonstrated by the outstanding cycling stability with a specific capacitance retention of 87.84 % after 20,000 cycles.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Jianning Zhang,Yanpei Dang,Tianhao Li,Yangzhong Zhao,Liantai Duan,Ke Chen,Xiao Zhang,Hengli Duan,Wensheng Yan,Sihua Feng,Gang Shao,Zhaoju Yu,Qing Huang,Yujie Song
Silicon boron carbonitride (SiBCN) ceramics have garnered significant attention due to their exceptional high-temperature stability, resistance to creep, and favorable electrical properties. However, the ceramicization mechanism of covalently bonded boron atoms in polyborosilazane (PBSN), which is crucial in determining the structural and crystalline phase evolution of silicon boron carbonitride (SiBCN) ceramics through the polymer-to-ceramic process, still needs further clarification for the design of advanced ceramics. Therefore, PBSN precursors constructed with B–C bonds were systematically investigated in the polymer-to-ceramic conversion process. B–C bonds were transformed into B-N bonds between 300°C and 600°C, ultimately resulting in the formation of h-BN at high temperatures. Meanwhile, higher levels (8.11–14.12%) of B facilitated the formation of SiC at equivalent temperatures but hindered the formation of Si 3 N 4 crystal nuclei. That is due to the formation of B–N and NB 3 units, which inhibited the formation of Si–N bonds and SiN 4 units, thereby interfering with the nucleation process of Si 3 N 4 and facilitating the crystallization of SiC. This study offers valuable insights for regulating the microphase evolution and properties of PDC nanocomposites.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Han Xu,Gangsong Huang,Wenting Zhou,Xuan Miao,Hongjun Ji,Mingyu Li,Yufeng Li
In the realm of electronic packaging advancements, the utilization of metal to ceramic joints has garnered significant attention. This manuscript details the development of a specific glass solder with excellent wettability and a thermal expansion coefficient of 8.1 × 10 −6 °C −1 , comprising 35Bi 2 O 3 -30B 2 O 3 -15ZnO-20SiO 2 (mol.%). This design achieves reliable connection of the Al 2 O 3 ceramics and Kovar alloy in an atmospheric environment. The interface reaction between the glass solder, Al 2 O 3 ceramics, and oxidized Kovar alloy resulted in the formation of ZnAl 2 O 4 particles and Bi spheres at the joints. The enhancement in joint shear strength was primarily attributed to the nanoscale, dispersed ZnAl 2 O 4 particles. However, the presence of microscale Bi spheres, with a lower elastic modulus than the glass solder, initiated cracks during shear deformation, thereby compromising the integrity of the joint. Optimization of brazing temperatures enabled control over the ZnAl 2 O 4 and Bi sphere phases within the joints, yielding a peak shear strength of 51.7 ± 8.9 MPa at 650 °C. This study highlights the achievement of high-performance metal-ceramic bonding through tailored interface reactions and optimized joint microstructures.
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ChemCatChem
·
2025
·
IF 3.9
Tianao Zhang,Haolong Huang,Yunchong Wang,Qianqian Zhao,Rui Han,Qingling Liu
Graphical CoO x /BCN catalyst with dual active sites was successfully synthesized. This catalyst exhibits excellent selectivity (99%) and a cyclic carbonate yield (98%) in the CO 2 cycloaddition reaction with the nucleophilic reagent KI under solvent-free and mild reaction conditions. This catalyst also has good stability and reusability, providing a new direction for the design of high-performance CO 2 cycloaddition catalysts. The carbon dioxide (CO 2 ) cycloaddition reaction provides an efficient route to achieve resource utilization of CO 2 . However, the inherent chemical stability of CO 2 itself hinders its efficient transformation into cyclic carbonates. Herein, the CoO x /BCN catalyst was successfully prepared by a simple deposition method. The CoO x /BCN exhibited excellent catalytic performance in the CO 2 cycloaddition reaction synergistically catalyzed with the nucleophilic reagent KI under solvent-free and mild reaction conditions (80 °C, 0.8 MPa, 6 h). The yield of cyclic carbonate was 98% and the selectivity was 99%, which was significantly superior to CoO x /CN catalyst (with a cyclic carbonate yield of 73.7%). Furthermore, after six cyclic reactions, CoO x /BCN still maintained a yield of over 93%. It was found that after boron (B) was doped into graphitic carbon nitride (g-C 3 N 4 ), the generated ─NB(OH) 2 group on CoO x /BCN effectively activated the epoxide. Importantly, the interaction between B-doped g-C 3 N 4 and CoO x induced the generation of abundant oxygen vacancies, which provided sufficient active sites for CO 2 adsorption and activation. In addition, carbonates were identified as the main reaction intermediates by in situ DRIFTS, and the possible reaction pathways of the CoO x /BCN catalyst were proposed. Therefore, this work provides new idea for the design of catalysts for CO 2 cycloaddition.
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ENERGY & FUELS
·
2025
·
IF 5.3
Mingqiang Chen,Yupei Li,Yishuang Wang,Defang Liang,Chang Li,Haosheng Xin,Jun Wang
Catalytic depolymerization of lignin (CDL) is a prospective technology for the efficient utilization of biomass. In this paper, novel B–Ti-modified diatomite-supported nickel phosphide catalysts (xNiP/BTD) were prepared to depolymerize lignin in a unique formic acid-assisted aqueous-phase glycerol medium. Under optimal conditions, 4NiP/BTD exhibited 100% lignin conversion and 95.4% lignin oil (LO) yield, in which the yield of petroleum ether (PE)-soluble product reached 20.6%. Based on the characterization results, the superior performance of 4NiP/BTD for CDL was attributed to the collaborative effect of metallic Ni0 centers and acidic sites within Ni3P species. Among these, metallic Ni0 sites activated formic acid and aqueous-phase glycerol to generate active hydrogen (denoted as H*); subsequently, lignin was dominantly converted into phenol and alkyl guaiacol under the comprehensive function of H*, Lewis (Niδ+ species), and Bronsted acid sites (P–OH groups). Additionally, a potential reaction pathway for CDL with 4NiP/BTD as the catalyst was suggested. This study established a feasible approach for the efficient conversion of lignin using crude glycerol and green clay resources.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
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IF 7.7
Yayun Jiang,E Jianfei,Youwei Li,Jian Chen,Jie Yang,Yang He,Gang Mai,Laibao Zheng
Group B Streptococcus (GBS) is a major cause of neonatal morbidity and mortality, underscoring the urgent need for rapid, accurate, and deployable diagnostics. Conventional culture and nucleic acid amplification tests are limited by long turnaround time, insufficient sensitivity, or dependence on sophisticated instrumentation, restricting their use in resource-limited settings. Here, we present a magnetically controlled dual-mode biosensing platform, termed c olorimetric/ p hotothermal–CRISPR/ Cas – Au @ Pt nanozyme (CP-CasAuPt), which integrates the sequence-specific trans-cleavage activity of CRISPR/Cas12a with the peroxidase-mimicking activity of Au@PtNPs. The catalytic oxidation of 3,3′,5,5′-Tetramethylbenzidine (TMB) generates oxidized TMB (oxTMB), which provides a visible colorimetric change and a near-infrared photothermal response, thereby enabling reliable dual-mode readouts with minimal instrumentation. Magnetic bead-assisted separation further reduces background signals, ensuring robust performance in complex matrices. Using GBS as a proof-of-concept, CP-CasAuPt achieved a detection limit of 10 3 CFU/mL after loop-mediated isothermal amplification, with results fully consistent with qPCR across 20 clinical samples. Beyond high sensitivity and specificity, this study establishes a generalizable strategy for multimodal molecular diagnostics, where orthogonal dual signals allow cross-validation, ensuring robust detection across diverse assay conditions. The CP-CasAuPt system thus offers a promising paradigm for rapid, instrument-free pathogen detection, particularly suited for resource-limited settings.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 7
·1762-1770
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IF 7.2
Ma Qin,Shi Lin,Ran Baocheng,Ma Tianfeng,Wang Huan,Lu Yongchang
Up to now, “Turn-on” fluorescence sensor exhibits promising potential toward the detection of heavy metal ions, anions, drugs, organic dyes, DNA, pesticides, and other amino acids due to their simple, quick detection, and high sensitivity and selectivity. Herein, a novel fluorescence method of detecting Cr 3+ in an aqueous solution was described based on the fluorescence resonance energy transfer between rhodamine B (RhB) and gold nanoparticles (AuNPs). The fluorescence of RhB solution could be obviously quenched (“off” state) with the presence of citrate-stabilized AuNPs. However, upon addition of Cr 3+ to AuNPs@RhB system, the fluorescence of AuNPs was recovered owing to the strong interaction between Cr 3+ and the specific groups on the surface of citrate-stabilized AuNPs, which will lead to the aggregation of AuNPs (“on” state). At this point, the color of the reaction solution turned to black. Under optimal conditions, the limit of detection (LOD) for Cr 3+ was 0.95 nM (signal-to-noise ratio, S/N = 3) with a linear range of 0.164 nM to 3.270 µM. Furthermore, the proposed method exhibits excellent performances, such as rapid analysis, high sensitivity, extraordinary selectivity, easy preparation, switch-on fluorescence response, and non-time consuming.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Panpan Wang,Wenquan Cui,Huan Wang,Weijia An,Shuo Zhao,Hongxia Guo
Hydrogen production by photoelectrocatalytic (PEC) decomposition of water is a promising pathway for green hydrogen acquisition. The construction of highly efficient and low-cost HER catalyst is the key to the commercialization of hydrogen production. Ni–Mo–B/TNTs (titanium dioxide nanotubes) nanocatalysts were prepared by a one-step electrodeposition method. Due to the synergistic effect of the nonmetallic B and the transition metal Ni–Mo, the composite photoelectrode exhibited a low overpotential and high stability in an alkaline electrolyte. Density functional theory (DFT) calculations confirmed that the ternary catalyst Ni–Mo–B/TNTs significantly optimized the adsorbed hydrogen intermediates, lowered the free-energy barriers of hydrogen adsorption, and facilitated the desorption of H 2 , which resulted in an enhancement of HER activity.
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Foods
·
2022
·Vol. 11
·期 15
·2381
·
IF 5.561
Lilong Wang,Linlin Wang,Chunhong Yan,Chunqing Ai,Chengrong Wen,Xiaoming Guo,Shuang Song
The present study aimed to clarify the potential mechanism of fucoidans found inAscophyllum nodosumon anti-inflammation and to further explore the relationship between their structures and anti-inflammation. Two novel fucoidans named ANP-6 and ANP-7 and found inA. nodosum, were separated and purified and their structures were elucidated by HPGPC, HPLC, GC-MS, FT-IR, NMR, and by the Congo red test. They both possessed a backbone constructed of →2)-α-L-Fucp4S-(1→, →3)-α-L-Fucp2S4S-(1→, →6)-β-D-Galp-(1→, and →3,6)-β-D-Galp4S-(1→ with branches of →2)-α-L-Fucp4S-(1→ and →3)-β-D-Galp-(1→. Moreover, ANP-6 and ANP-7 could prevent the inflammation of the LPS-stimulated macrophages by suppressing the NO production and by regulating the expressions of iNOS, COX-2, TNF-α, IL-1β, IL-6, and IL-10. Their inhibitory effects on the TLR-2 and TLR-4 levels suggest that they inhibit the inflammation process via the blocking of the TLR/NF-κB signal transduction. In addition, ANP-6, with a molecular weight (63.2 kDa), exhibited stronger anti-inflammatory capabilities than ANP-7 (124.5 kDa), thereby indicating that the molecular weight has an influence on the anti-inflammatory effects of fucoidans.Keywords:sulfated polysaccharides;chemical structure;anti-inflammation;molecular weight
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PubMed
高影响因子
DYES AND PIGMENTS
·
2015
·
IF 3.966
Jingyue Xu,Ying Li,Luokai Wang,Yanjun Huang,Danlei Liu,Rui Sun,Jialin Luo,Chunyan Sun
A facile aptamer-based sensing strategy was developed for dopamine through the fluorescence resonance energy transfer (FRET) between rhodamine B (RB) and gold nanoparticles (AuNPs). The different affinities of unbound and bound aptamers toward AuNPs were employed to modulate the FRET efficiency for signal transfer. Dopamine-binding aptamers (DBA) could protect AuNPs from salt-induced aggregation, resulting in the fluorescence quenching of RB via FRET. Specific binding of DBA with dopamine formed the structured complex, losing the capability to stabilize AuNPs, thus the salt-induced aggregation of AuNPs led to the decrease of fluorescence quenching ability. Correspondingly, the fluorescence intensity of RB recovered along with the dopamine concentration ranging from 26 to 2.90 × 10 3 nM with the detection limit of 2 nM. This method was successfully applied for dopamine determination in swine feeds and chicken livers. Owing to its high sensitivity, excellent selectivity and convenient procedure, this strategy will provide a promising alternative for dopamine screening.
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POLYHEDRON
·
2025
·
IF 2.6
Tiantian Luo,Junyi Wang,Ruiyan Wang,Jiale Wang,Hao Yan,Bei Zhang,Qi Zhou
In this study, a one-dimensional core–shell photocatalyst composed of hydrogenated TiO 2 (H-TiO 2 ) coated with an amorphous metal–organic framework (MOF) was synthesized via a simple hydrothermal method and applied as an efficient peroxymonosulfate (PMS) activator for Rhodamine B (RhB) degradation. Under simulated sunlight irradiation for 20 min, the optimized H-TiO 2 /BPDC*2 catalyst achieved 99.40 % RhB removal at an initial concentration of 100 mg/L. Its apparent kinetic rate constant was 4.28 and 1.06 times higher than those of H-TiO 2 and H-TiO 2 /BPDC, respectively. The enhanced performance is attributed to the core–shell heterojunction structure, which improves light absorption and charge separation, as evidenced by increased photocurrent, reduced photoluminescence intensity, and shorter time-resolved photoluminescence (TRPL) decay. Furthermore, the catalyst exhibited excellent stability over multiple cycles, demonstrating strong potential for practical wastewater treatment applications. Mechanistic studies revealed that ·O 2 − and 1 O 2 were the dominant reactive species involved in the degradation process.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 23
·11548
·
IF 4.9
Haowen Fang,Xiaodong Sun,Yanting Ding,Siyuan Gu,Bing Niu,Qin Chen
This study aimed to develop a potent, safe, and cost-effective small-molecule hypoglycemic agent derived from Loureirin B, with preliminary evaluation of its efficacy and mechanistic underpinnings. Thirty structural analogs of Loureirin B were synthesized. Molecular docking identified LB-A as the lead compound targeting GLP-1R. Its hypoglycemic activity was initially assessed in a murine model. Molecular dynamics simulations, surface plasmon resonance (SPR), and circular dichroism (CD) were employed to characterize LB-A–GLP-1R interactions. The involvement of the GLP-1R/cAMP/PKA pathway and downstream mediators was examined using cellular assays, gene knockout, and Western blotting, with emphasis on FOXO1. LB-A exhibited the strongest binding affinity for GLP-1R among the analogs and significantly reduced blood glucose levels in mice. It formed hydrogen bonds and hydrophobic interactions with key residues (e.g., LYS197) and induced conformational changes in GLP-1R. LB-A activation of GLP-1R upregulated cAMP, PKA, and pCREB, suppressed PTEN/FOXO1 signaling, and subsequently stimulated insulin secretion. LB-A represents a novel small molecule agonist that ameliorates hyperglycemia in diabetic mice through specific activation of the GLP-1R/cAMP/PKA/pCREB/PTEN/FOXO1 pathway.
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PubMed
高影响因子
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