SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Huihui Ding,Huanhuan Wu,Jun Ma,Xiang Li,Shuangshuang Huai,Chengming Zhang,Haibao Zhu,Ping Li,Jie Li,Xiufang Wang,Wenjie Xie
Artificial photosynthesis converting CO 2 into valuable compounds has garnered significant interest. However, the insufficient surface activity sites, weak adsorption capacity of CO 2 and poor electron-hole separation capability hinder CO 2 photoreduction used for practical implementation. Herein, Bi nanoparticles/Bi 24 O 31 Br 10 composite photocatalyst (Bi/BOB) was designed constructed through in-situ reduction of bismuth metal on the surface of ultra-thin Bi 24 O 31 Br 10 nanosheets. Bi/BOB exhibits an excellent ability to reduce CO 2 to CO. The CO 2 reduction rate of the optimized Bi/BOB composite catalyst is 43.07 μmol·g −1 ·h −1 , which is significantly superior to other reported bismuth-based photocatalysts. Experimental characterization and Theoretical simulation calculation reveal that the in-situ reduction of bismuth metal causes significant local lattice distortion and uneven charge distribution, thereby producing a strong interaction between Bi nanoparticles and BOB support. So, it enhances the adsorption and activation of carbon dioxide molecules and reduces the Gibbs free energy barrier during the catalytic reaction. Moreover, the strong interaction helps to enhance the separation of photogenerated charge carriers and stability of catalysts. This study offers research suggestions for the interaction between metal and support to enhance CO 2 reduction.
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Advanced Science
·
2025
·
IF 14.1
Bozhi Yang,Xin Min,Xinyu Zhu,Shaorou Ke,Shujie Yang,Ya Chen,Wei Wang,Ruiyu Mi,Yangai Liu,Zhaohui Huang,Xi Kai,Minghao Fang,R. Vasant Kumar
Bismuth is a promising anode material for potassium-ion batteries due to its green, non-toxic and high theoretical capacity (384 mAh g −1 ). However, the sluggish reaction kinetics and excessive volume expansion during cycling limit its practical application. Herein, Bi-induced few-layered graphite frameworks are in situ encapsulated on the surface of Bi nanoparticles, based on the mechanism of graphitization by rearrangement of interstitial carbon atoms during the nucleation process of Bi, while these composite particles are embedded in Bi-doped porous carbon fibers composite. The graphite frameworks can stabilize the structure while serving as an efficient interfacial transfer layer, enabling rapid transport of both potassium ions and electrons. Bi atoms doped into the carbon fiber matrix effectively enhances the potassium ion transport kinetics in amorphous carbon by lowering the migration energy barrier of potassium ions in the carbon layer. The porous structure effectively alleviates the volume expansion of Bi nanoparticles during cycling, which synergistically results in superior high-rate performance and cycling stability. Finally, the capacity can reach 215 mAh g −1 at 10 A g −1 , and a capacity retention rate of 83.8% is achieved after 6000 cycles at 10 A g −1 with an ultra-low decay rate of 0.00278% per cycle.
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Materials
·
2025
·Vol. 18
·期 9
·2149
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IF 3.2
Qingmeng Wang,Xiuli Wang,Xiaomin Cheng,Qianju Cheng,Yi Yang
In the fields of nuclear engineering and solar thermal utilization, low melting point alloys with excellent thermal conductivity and heat transfer performance have attracted extensive research as a new generation of heat transfer fluids, leading to many fundamental and important application issues. This study investigates the high-temperature corrosion behavior of Sn-50Bi-2Zn (wt.%) heat transfer alloy against 304 stainless steel (304), 310S heat-resistant steel (310S), and 20 carbon steel (20C) at 600 °C. Theoretical analysis, based on Fick’s diffusion law, and experimental measurements reveal significant differences in corrosion severity. After 473 h, 20 carbon steel exhibited the lowest corrosion layer thickness (0.07 mm), while 310S suffered the most severe corrosion (1.50 mm), exceeding 304SS (0.83 mm) by 81%. Diffusion coefficients derived from Sn penetration depths further quantified these trends: D310S = 2.51 × 10−7mm2/s (6.8 × higher than 304: 3.7 × 10−8mm2/s) and D20C = 2.87 × 10−10mm2/s (128 × lower than 304SS). XRF analysis confirmed the dissolution of steel components into the molten alloy, with Fe, Cr, and Ni content increasing to 0.382 wt.%, 0.417 wt.%, and 0.694 wt.%, respectively, after 480 h. These results underscore the critical role of Ni content in accelerating Sn/Zn diffusion and pore formation, providing actionable insights for material selection in high-temperature heat transfer systems.
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Materials Today Bio
·
2025
·
IF 10.2
Shuang Bian,Yangang Zhu,Nanxin Zhao,Yanchen Wang,Zhimou Yang,Jingjing Li
Atherosclerosis (AS) is characterized by lipid overaccumulation and progressive chronic inflammation. Macrophages over-accumulate at plaque sites and promote fibrous cap instability and plaque rupture by participating in lipoprotein uptake and metabolism, inflammatory factor secretion, and the production of enzymes and toxic metabolites. The macrophages accumulating at plaque sites are mainly derived from circulating blood-derived monocytes. Therefore, we designed a peptide 2P with an alkaline phosphatase (ALP) induced self-assembly function and P-selectin targeting function to form a supramolecular bi-antibodies 2P@VLA-4 by coassembling with VLA-4, a CD106 affinity. The dephosphorylation site and efficiency were optimized. 2P@VLA-4 displayed enhanced protein stability and binding ability to inflamed vascular endothelial cells. Through the dual-targeted blocking effect on the adhesion binding site of monocytes, 2P@VLA-4 could significantly reduce the accumulation of monocytes/macrophages at the plaque site, thereby inhibiting the progression of AS. At the same time, modification of peptides with fluorescent molecules enabled specific imaging of plaques. This study focused on the ease of design and functionalization of peptides, to synthesize supramolecular bi-antibodies compound innovatively by enzyme instructed self-assembly (EISA), achieving the significant inhibition of the adhesion and aggregation of monocytes at plaque sites. Coupling with its specific imaging capability, it may provide new approaches for the integrated design of diagnosis and treatment of AS .
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Wei Xiang,Lijun Jia,Tingqing Cai,Xuening Han,Mingchao Yang,Huaiwu Zhang
To meet high-power microwave system demands, low-temperature sintered Bi-Li-V substituted YIG ferrites were prepared. The experimental results reveal that Bi 3+ , Li + , and V 5+ occupy the c, a, and d sites of the garnet structure, respectively; the full-site distortion reduces the lattice activation energy, significantly reducing the transformation temperature from perovskite to garnet phase. Additionally, a dual structure with a high percentage of fine grains is observed in the substituted samples, which is an important reason for the large increase in spin-wave linewidth. Isothermal thermodynamic analysis indicates that a sintering mechanism dominated by liquid-phase sintering is conducive to the densification of YIG ferrites. Ferromagnetic resonance linewidth decomposition confirms that, due to the simultaneous increase in the saturation magnetization and the magneto-crystalline anisotropy constant, anisotropy-induced linewidth remains almost unchanged; the dense dual structure leads to a significant reduction in porosity-induced linewidth; ultimately, the ferromagnetic resonance linewidth is greatly reduced.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Meifei Lian,Binbin Sun,Zhiguang Qiao,Kai Zhao,Xiaojun Zhou,Qianqian Zhang,Duohong Zou,Chuanglong He,Xiuyin Zhang
Guided bone regeneration (GBR) membranes have the potential to prevent the invasion of epithelial and connective tissues as well as to maintain a stable space for facilitating the ingrowth of regenerative bone tissue. However, the bioactivity and regeneration potential of currently available membranes still need to be improved. In this study, a novel bi-layered membrane with both osteogenic and antibacterial functions was developed for GBR applications. The loose layer (LL) of the membrane was composed of conjugated electrospun poly (lactic-co-glycolic acid) (PLGA)/gelatin nanofibers incorporating dexamethasone-loaded mesoporous silica nanoparticles ( [email protected] ), while the dense layer (DL) of the membrane consisted of traditionally electrospun PLGA nanofibers loaded with the broad-spectrum antibiotic doxycycline hyclate (DCH). Morphological results showed that the LL ( [email protected] /PLGA/Gel) membrane exhibited a porous and loosely packed structure, which was beneficial for cell adhesion and infiltration, while the DL (DCH/PLGA) membrane remained dense enough to act as a barrier. In vitro drug release tests indicated that both DEX and DCH followed a favorable sustained release profile. The cell viability evaluation suggested that the electrospun membranes possessed good cytocompatibility. Furthermore, in vitro osteogenesis analyses demonstrated that the [email protected] /PLGA/Gel composite membrane possessed an enhanced osteoinductive capacity for rat bone marrow stem cells (BMSCs), which was verified by the increased alkaline phosphatase (ALP) activity, the enhanced calcium deposition, and the upregulated osteocalcin (OCN) expression. In vitro antimicrobial experiments revealed the effective antibacterial potency of the DCH/PLGA membrane. In conclusion, the prepared nanocarrier-incorporated bi-layered composite membrane with combined osteogenic and antibacterial properties may be a promising candidate for GBR application.
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Processes
·
2025
·Vol. 13
·期 11
·3535
·
IF 2.8
Rongrong Jia,Mingchuan Tang,Mengshan Hou,Haiheng Xing,Yuxing Cai,Jianhao Wu,Xiaozhuo Wang,Jinchao Chen,Lan Li,Chengchao Jin,Zhi Chen,Xiaojing Wang
The development of photocatalyst material is vital for the practical application of environmental purification, solar energy conversion, and chemical production. In this work, a spherical Bi(C6N7O3) photocatalyst is successfully prepared by replacing K+of rod-shaped K3[C6N7O3] with Bi3+ions through the ion exchange method, which demonstrates an improved homogeneous photodegradation efficiency over antibiotics in water compared to pristine K3[C6N7O3]. Under visible light irradiation, Bi(C6N7O3) degraded 81% of tetracycline hydrochloride within 60 min, and the rate constant was 1.8 and 79.1 times greater than K3[C6N7O3] and bulk g-C3N4, respectively. Scavenger experiments revealed that superoxide radicals and holes are the primary active species in the photocatalytic process. This study presents a promising route for designing high-performance visible-light photocatalysts by a simple ion-exchange approach for environmental applications.
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Sustainable Energy & Fuels
·
2025
·
IF 4.1
Yongheng Xiong,Yang Yu,Huangang Shi,Jifa Qu,Wenyi Tan
Single atom Fe sites, doped in CN materials, exhibit outstanding electrochemical activity for CO2-to-CO conversion. The pyrolysis of ZIF8 is a controllable method for fabricating isolated single atom metal sites. In this study, we propose a new strategy to increase the ratio of Fe in ZIF8 precursors by synergistically replacing Zn2+ with Bi3+ and Fe3+. After precursor pyrolysis, the obtained Bi/Fe–N–C catalysts, consisting of Bi sites and pyrrole-type Fe–Nx sites, serve as efficient electrocatalysts for the CO2RR. The results show that the optimized catalyst loaded with 94.8 mg per kgCat Fe exhibits a high FECO of >90.1% over a wide potential range of −0.4 to −0.7 VRHE (98.2% at −0.5 VRHE). Insights into the electrochemical reaction mechanism show that this successful design of Bi/Fe–N–C catalysts can provide a stable catalytic site to form *COOH, thus achieving energy-efficient electrochemical CO2 reduction to CO.
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IONICS
·
2025
·
IF 2.6
He Shuangyi,Wang Zihao,Zhang Shuai,Zhao Weiwei,Luo Jujie
In this study, Ag – Bi bimetallic negative electrode was prepared on Fe foam substrate through a clean and efficient one-step microwave route. The synergistic effect of Ag, Bi, and Fe endowed the electrode with a remarkable electrochemical performance. The electrode attained an impressive areal capacitance of 5.24 F cm −2 at 1 mA cm −2 in 6 M KOH. Notably, the capacitance dropped to 76% of its original capacitance after undergoing 10,000 charge-discharge cycles at 10 mA cm −2 , which indicates good stability and reliability. Furthermore, an asymmetric supercapacitor was designed and built using Ag–Bi/iron foam as the positive electrode. The device maintained an 85.3% initial capacitance through 12,000 charge-discharge cycles, while delivering good areal energy/power density (643.56 µWh cm −2 /1266.63 µW cm −2 ). This study established a fabrication strategy for high-performance anode materials, achieved an excellent balance between electrochemical efficiency and economic viability, and demonstrated substantial potential for practical application.
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BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Yuqing Zhang,Jingjing Ye,Jiayi Fu,Honglin Song,Yifu Zhou,Xu Wu,Xinyue Jia,Ruo Yuan,Wenju Xu
Exploring a responsive cascaded amplifier of bi-recycled strand displacement ( b SD) and mismatch-mediated hairpin assembly ( m HA) might be intriguing for constructing sensitive electrochemical biosensor. The proof-of-concept example for operating b SD started with the design of a recognizable hairpin encoding three functional modules, including specific complement, contiguous Nt.BbvCI site, and locked primer-matchable fragment. Upon introducing a targeted short-stranded oligonucleotide segment, b SD events were activated to execute repetitive strand elongation and nicking-mediated displacement reaction, generating a target analogue to implement similar affinity recognition for cooperative autocatalysis. This progress efficiently guided the production of numerous analogues for unfolding a metastable double-stem hairpin structure, and rationally induced progressive m HA via cross-opening and sequential hybridization between two functional hairpins, in one of which the inclusion of a mismatched base was beneficial for driving b SD- m HA cascade faster forward. As such, the labeled electroactive ferrocene (Fc) tags were orderly anchored in the resulting long linear product, thereby achieving significant amplification of current signal and highly sensitive detection down to femtomole. Compared with conventional hairpin assembly, our b SD- m HA-based logic operation substantially improved the transduction reaction kinetics, showing about 4.6-fold increment of reaction rate, while higher amplification yield emerged at lower trigger was more superior than b SD or m HA alone. Thus, this cascade-amplifying strategy would suggest a new paradigm to create robust and cost-effective electrochemical biosensors for applicable biosensing and bioassay.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Feng Zhou,Shijie Liu,Yuanyuan Zhao,Xinzhi Liu,Danfeng Qin,Hua Liu
In this work, a high-sensitivity electrochemical sensor was developed using a hybrid strategy, where sheet-like MXenes-based composites (Bi-MOF/MXenes) were prepared through the in-situ growth of bismuth-based metal-organic frameworks (Bi-MOF) on the MXenes surface. This hybrid composite material was fabricated using a simple physical synthesis method, which maintains excellent electrocatalytic activity while enhancing the electron transfer rate and electroactive surface area. The Bi-MOF/MXenes modified electrode has been demonstrated to be an effective tool for the detection of nitrite. The electrode exhibited a remarkable limit of detection (LOD) of 0.028 μM and a wide linear range of 0.5~4715 μM. The sensor exhibited remarkable repeatability and reproducibility, with relative standard deviation (RSD) values of 1.74% and 4.87%, respectively. The proposed approach was effectively utilized for detecting nitrite in sausage and fermented bean curd.
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JOURNAL OF COORDINATION CHEMISTRY
·
2017
·
IF 1.795
Yong-Qiang Chen,Yuan Tian,Dao-Li An
A new coordination framework, [Co2(L)2(bpy)2(H2O)]n (1) (H2L = (4-phenyl)-2,6-bis(4-carboxyphenyl)pyridine and bpy = 2,2′-bipyridine), has been prepared and structurally characterized. Complex 1 shows an interesting bi-chain substructure bridged by coordinated water molecules, which is further extended into a three-dimensional (3-D) supramolecular structure by π–π stacking interactions. Moreover, the magnetic properties and photocatalytic activity for degradation of methyl orange have been investigated.
研究领域:
配位化学
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材料科学
·
物理化学
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危险品化学品经营许可证（带存储）