JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Feng Lulu,Li Hainan,Zhang Zishuai,Pang Shuang,Liu Zhiyu,Lin Jiahao,Wang Shiyu,Lou Zhenning
Carbon quantum dots (CQDs), as zero-dimensional carbon-based fluorescent materials, have garnered significant attention in environmental and biological monitoring due to their low toxicity, high stability, and tunable synthesis. This study pioneers a green synthesis of nitrogen-doped carbon quantum dots (N-CQDs) using medium-molecular-weight chitosan as a single precursor via one-step hydrothermal optimization (190 ℃, 24 h). The resulting N-CQDs exhibit uniform spherical morphology (typical diameter: 3 nm) with amorphous through a dual-mechanism: (i) Coordination binding between Fe 3+ and surface functional groups, (ii) Photoinduced electron transfer (PET) facilitated by the high redox potential of Fe 3+ (E⁰ = +0.77 V vs. SHE). The N-CQDs achieve a 2.72 µM detection limit (S/ N = 3) for Fe 3+ with excellent selectivity against 15 interfering ions (Al 3+ , Cu 2+ , etc.) and validated performance in tap/lake water samples (99.98-100.04% recoveries). Furthermore, the chitosan-derived N-CQDs were successfully applied as a fluorescent probe for cell imaging in onion epidermis, where they predominantly accumulated on the cell membrane with excellent color rendering performance. Notably, the fluorescence was effectively quenched upon the introduction of Fe 3+ ions, demonstrating their possibility as a responsive probe in biological systems. This work demonstrates the significant potential of biopolysaccharide-derived nanomaterials, highlighting their dual promise for both precise environmental sensing and responsive bioimaging applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Xiaodi Niu,Xinyan Wang,Ning Huo,Hongsu Wang
Mimicking the sophisticated oxidative machinery of natural monooxygenases for high-performance biosensing remains a grand challenge, primarily due to the elusive control over positive charge carriers (holes) required for efficient signal amplification. Here, we report an atomically precise Fe-Cu heteronuclear diatomic catalyst (Fe-Cu-HDC) that unlocks unprecedented analytical sensitivity through a novel asymmetric hole-confinement mechanism. Unlike traditional single-atom catalysts where charge carriers are delocalized, the Fe-Cu interface acts as a decisive “hole trap” spatially concentrating reactive charge carriers at the active center. This localized accumulation triggers the formation of potent high-valent iron species and facilitates barrierless oxygen activation, providing the rapid mineralization of >80% tetracycline within 80 min with a superior reaction rate ( V max = 0.27 mM min −1 ). Leveraging this hole-driven enzymatic proficiency, we engineered an integrated 3D-printed platform comprising a continuous-flow filtration reactor and a smartphone-based colorimetric sensor array. This portable device enables the simultaneous rapid mineralization and fingerprint-like discrimination of tetracycline antibiotics in complex real-world matrices (raw milk and livestock wastewater) with a detection limit as low as 30 nM. The platform maintains >90% activity after 18 d of storage and demonstrates laboratory-grade accuracy in raw milk and livestock wastewater. Our findings not only demystify the electronic origin of bio-inspired oxidation but also establish hole-carrier engineering as a transformative dimension for designing the next generation of intelligent, cofactor-free biosensors for on-site diagnostics and environmental surveillance.
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yaman Cui,Yuhang Qian,Xiangjun Zheng,Qing Sun,Jiayu Zhao,Xingmei Guo,Yuanjun Liu,Zhongyao Duan,Qianqian Fan,Junhao Zhang
To resolve the critical trade-off between anchoring stability and active-site accessibility in flexible zinc-air batteries, this work proposes a molecular-bridged reconstruction strategy. Employing urea molecular bridging and thermally driven reconstruction (carbon–collapse–metal–migration), we engineer semiembedded Fe-based active sites in a dual-carbon armored architecture (NC/Fe/NCF) composed of a flexible carbon fiber substrate with a protective N-doped outer layer through thermally driven carbon reconstruction. This unique semiexposed/semiconfined configuration ensures interfacial accessibility while preventing active-center leaching, eliminating binders and current collectors. The optimized dual-carbon architecture achieves a high surface area (905 m2·g–1), stabilized active species, and enhanced electron conductivity. The resultant self-supported electrode delivers superior ORR performance with a 0.89 V half-wave potential (exceeding Pt/C by 30 mV) and merely 8 mV decay after 10,000 cycles. When deployed in liquid zinc-air batteries, it enables ultrastable operation for >1300 h (2600 cycles). Critically, the flexible battery achieves a 1.38 V open-circuit voltage and 58 mW·cm–2 peak power density and sustains 500 cycles without failure. By integrating toxic-solvent-free green synthesis with structural innovation, this work develops scalable robust flexible energy storage toward sustainable electronics.
✓ 已验证
DOI
PubMed
高影响因子
Small Methods
·
2026
·
IF 8.7
Rui Wang,Xinyu Zhao,Xiaoyu Li,Hui Kong,Zengqing Sun,Ailin Xia,Zhaoyang Wu
To reduce carbon emissions associated with the traditional preparation of Fe–Si (6.5 wt.%) alloy powder, the main precursor of high-frequency soft magnetic composites, this study developed a green, controllable, and melt-free powder-preparation methodology enabled by defect-architecture engineering. Hydrogen-reduced iron powders are first subjected to surface mechanical attrition treatment (SMAT) and subsequently processed via a dual-stage heat-treatment protocol, comprising low-temperature Si infiltration at 565°C followed by homogenization at 900°C, to achieve rapid alloying and uniform silicon distribution. SMAT generated a gradient nanostructure through high-strain-rate deformation via dislocation multiplication and grain-boundary rearrangement, providing short-circuit diffusion paths that lowered the silicon infiltration temperature to 565°C. After homogenization at 900°C, silicon was evenly distributed throughout the prepared Fe–Si alloy powder. As proof of method, Fe–Si@boron nitride soft magnetic composites prepared from this material exhibited low power loss (201.5 kW/m 3 at 100 kHz and 50 mT), and high permeability retention (>80% under a 7.96 kA/m DC bias), outperforming mainstream commercial counterparts. Overall, this defect-enabled route offers an energy-efficient strategy for scalable low-temperature diffusion alloying of metal powders and for fabricating high-performance soft magnetic composites.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Tao Gong,Huifang Xu,Xulei Sui,Zhaoyang Han,Ruihui Gan,Longji Yuan,Yuzhe Liu,Huici Qiao,Yongping Zheng,Zhenbo Wang
Rational design integrating curvature and axial coordination enhances both activity and stability. • OTD induced strategy rivets the curved Fe–N 5 sites into porous graphitic carbon. • In MEA tests, the catalyst achieves 1.37 W cm −2 peak power,loses only 10.2% after 10k cycles, and retains 74.3% current at 0.65 over h. • Curved Fe–N 5 motifs tune electronic states and offer triple protection against Fe dissolution, carbon corrosion, and H⁺ attack. Fe–N–C exhibits exceptional catalytic activity and stands as a prominent representative of single-atom catalysts (SACs). However, the activity and, especially, the stability of its active sites pose a formidable challenge for practical applications. Therefore, we first performed DFT predictions on active site structural models featuring curvature and axial coordination, revealing that the curved Fe–N 5 configuration simultaneously boosts both the activity and stability. Then we adopt an O-Tolidine molecular-induced strategy to construct the curved graphitic carbon layers, which anchor Fe single atoms in a bent and axial N-coordinated configuration. The molecular-assisted effect facilitates micropore formation, accelerates the graphitization process, and simultaneously provides additional nitrogen coordination sites, ultimately achieving the curved Fe–N 5 configuration. The curved Fe–N 5 motifs establish a triple protection mechanism: resistance to Fe dissolution, suppression of carbon corrosion and shielding against H⁺ attack, thus alleviating the long-standing activity–stability trade-off in SACs. Benefiting from these structural merits, the as-obtained catalyst delivers outstanding durability in H 2 -O 2 fuel cell, achieving a high peak power density of 1.37 W cm −2 with only 10.2% performance degradation after 10,000 square-wave cycles—far lower than the 29.8% loss of conventional Fe–N–C. Under H 2 -Air conditions at 0.65 V, it retains 74.3% of its initial current density over 200 h. Download: Download high-res image (242KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 9
·761
·
IF 4.5
Haijian Yang,Changsen Zhang,Lianfeng Shang,Hanfang Feng,Na Xiao
Plastic waste has become a serious global issue. Thermal treatment of waste PET faces critical drawbacks including severe reactor clogging and low-value oxygen-rich bio-oil, restricting large-scale chemical recycling. Co-pyrolysis with hydrogen-rich low-density polyethylene (LDPE) over modified zeolite provides a viable route to overcome these barriers. In this study, reaction parameters including temperature, plastic/catalyst ratio and PET/LDPE ratio were optimized, and Fe-Ni bimetallic modified HZSM-5 was fabricated via impregnation to boost monocyclic aromatic hydrocarbons (MAHs) production. LDPE served as a hydrogen donor to facilitate PET deoxygenation via synergistic effects. At 550 °C with a plastic/catalyst ratio of 1:4 and PET/LDPE ratio of 2:3, the liquid yield hit 80.2%, and all detectable organic compounds in the liquid phase identified by GC–MS were aromatic hydrocarbons. Among all prepared mono- and bimetallic zeolites, 3Fe7Ni/HZ delivered optimal MAHs selectivity at 80.5%. This 20% promotion over unmodified HZSM-5 stems from balanced metal dispersion and tuned acid sites unique to Fe–Ni co-loading. This work offers a feasible strategy for converting waste plastics into high-value aromatics and further trials with varied metal contents will be needed to extend industrial applicability.
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 10
·934
·
IF 4
Zupeng Gong,Shixuan Ding,Mingjie Huang,Wen-da Oh,Xiaohui Wu,Tao Zhou
This study presents the preparation of iron and nitrogen co-doped sludge-based biochar (FeCN-MSBC) and iron oxide-doped biochar (FeO-MSBC) by ball milling municipal sludge with different iron precursors (K3Fe(CN)6and Fe2O3), followed by pyrolysis. These biochars were utilized to activate persulfate (PMS) for the degradation of phenolic pollutants. The results demonstrate that FeCN-MSBC, formed by the introduction of K3Fe(CN)6, contains Fe/N phases, with surface Fe sites exhibiting a lower oxidation state, which significantly enhances PMS activation efficiency. In contrast, FeO-MSBC, due to the aggregation of Fe2O3/Fe3O4, shows relatively lower catalytic activity. The FeCN-MSBC/PMS system degrades pollutants via a synergistic mechanism involving non-radical pathways mediated by1O2and electron transfer processes (ETP) catalyzed by surface Fe. Electrochemical oxidation and quenching experiments confirm that ETP is the dominant pathway. FeCN-MSBC, prepared at a pyrolysis temperature of 600 °C and an Fe loading of 3 mmol/g TSS, exhibited the best performance, achieving a phenol degradation rate constant (kobs) of 0.127 min−1, 4.5 times higher than that of undoped biochar (MSBC). FeCN-MSBC/PMS maintained high efficiency across a wide pH range and in complex water matrices, exhibiting excellent stability over multiple cycles, demonstrating strong potential for practical applications. This study provides an effective strategy for simultaneous Fe and N doping in sludge-derived biochar and offers mechanistic insights into Fe/N synergistic activation of PMS for practical water treatment.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaowei Wu,Ziqin Liu,Kaiquan He,Junlong Feng,Pu Hu,Fang Zhang,Chaoqun Shang
The lithium metal batteries (LMBs) using metallic Li as anode with high-energy density have been prevailed in the field of energy storage, while the aggregation of Li dendrites and brittle solid state electrolyte interface (SEI) impede the development of Li anode. In this work, to regulate the interface of Li anode, a Fe/Li 2 O/LiCl mixed electron/ion conducting layer is in-situ generated on the surface of Li anode, which is derived from the electrochemical reaction between Li anode and Fe 2 O 3 /FeOCl coatings on commercial separator. The synergistic effect between electron conductive Fe and ion conductive Li 2 O/LiCl is beneficial to build up dense and uniform SEI and promote uniform Li + flux, resulting in smooth Li deposition, which will further stabilize the Li metal surface and prolong the battery life of LMBs. Specifically, the symmetric Li||Li cells with Fe 2 O 3 /FeOCl can operate steadily for 600 h at 1 mAh cm −2 without obvious voltage polarization, and the corresponding full battery matched with S-PAN delivers capacity retention of 64.43 % at 500 mA g −1 after 350 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
界面工程
·
固态电解质界面
·
电池技术
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2026
·
IF 5.1
Xiaoyi Liu,Yuhang Xu,Hong Chen,Yao Wang,Yuanlin Chen,Runzhao Zhang,Yongqi Tang,Yongdan Li
Sunlight-driven conversion of biomass into value-added chemicals is crucial for building a sustainable energy future. However, this process often suffers from inefficient light utilization and unclear regulation of reactive oxygen species in photocatalysis. An Fe-doped graphitic carbon nitride (CNFe) photocatalyst was synthesized via a thermal polymerization method and 71.53% conversion of 5-hydroxymethylfurfural (HMF) with 55.56% selectivity to 2,5-furandicarboxylic acid (FDCA) were achieved under visible light. The catalyst was reused for at least four consecutive cycles without significant activity loss, demonstrating good recyclability and stability. Fe doping created a porous sheet-like structure with uniformly embedded Fe 3 O 4 nanocrystals and active Fe-N x sites, which enhanced visible-light absorption and charge separation. The Fe 3 O 4 /g‑C 3 N 4 Z‑scheme heterojunction, synergizing with the redox‑active Fe 3+ /Fe 2+ sites, facilitates efficient O 2 activation to generate selectively superoxide radicals (•O 2 - ). This work demonstrates a feasible strategy for designing efficient non-noble-metal photocatalysts and provides deeper insight into ROS regulation for the sustainable upgrading of biomass-derived feedstocks.
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 23
·64233-64245
·
IF 5.8
Jin Qi,Dong Yingbo,Pan Hanlin,Lin Hai
It is challenging to separate the materials for treating arsenic contamination of soil and water from systems. The natural magnetite covered with Fe–Mn bimetallic (oxyhydr)oxide (Fe–Mn MSM) was effectively created in this study, and its potential use in removing As from water and soil was investigated. Batch adsorption studies showed that the As(V) adsorption on Fe–Mn MSM could achieve equilibrium after 120 min when the initial As(V) concentration was 39.85 mg/L. The calculated maximum adsorption of Fe–Mn MSM for As(V) was 17.94 mg/g at 20 °C. The mechanism of As(V) adsorption was confirmed to be a combination of ligand exchange and electrostatic attraction by the outcomes of FTIR analysis, SEM, and batch adsorption tests. Fe–Mn MSM can also be a successful amendment for cleaning up As-polluted soil. The 5% Fe–Mn MSM treatment group had the lowest exchangeable fraction of As (EX-As) concentration, 0.039 mg/kg (8.3% of initial EX-As), after 40 days. Magnetic separation could be used to quickly and completely recover the used Fe–Mn MSM from the soil. EX-As was present in higher concentrations on Fe–Mn MSM than that of the original soil. As a result, this work offers a strategy that may be put into practice to cheaply remove As from soil and water while also encouraging the reuse of natural magnetite. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2023
·
IF 6.4
He Zhang,Xiao-Chun Deng,Guo-Hua Zhang
In this study, high performance W–Mo–Cu–Ni–Fe alloy samples with additions of Mo (0–6 wt%), Ni and Fe (total content: 2.5 wt% and 5 wt%) were obtained through liquid-phase sintering at lower temperature, with the raw material of ultrafine W–Mo–Cu–Ni–Fe composite powder. Ultrafine W–Mo–Cu–Ni–Fe alloy powder with strong sintering activity and uniform composition was obtained by two-stage reduction means composed of carbothermic pre-reduction and hydrogen deep deoxidation steps. Significantly, the bonding ability of W/Cu phase interface and the wettability of two phases are greatly improved due to the presences of Ni and Fe. Moreover, the addition of appropriate Mo content was advantageous to the formation of W–Mo solid solution . All alloy samples achieved higher densification degrees to guarantee that the sintered blocks possess outstanding overall performances. Especially, by adjusting Ni/Fe ratio, the highest tension strength and elongation of were achieved by W-2wt.%Mo-1.75 wt%Ni-0.75 wt%Fe-27.5 wt%Cu sintered block, which were 567 MPa and 10.37%, respectively. Moreover, owing to the presences of W–Mo and Cu–Ni–Fe solid solutions, this alloy also had the highest microhardness and bending strength of 446 HV and 1473 MPa, respectively. As increasing Mo content from 0 wt% to 6 wt%, the compression strength of sintered blocks was improved, and failure strains of all the sintered blocks are close to 100%, respectively. However, even though the Cu matrix network structure is more evenly distributed as a result of the existences of added Ni and Fe, the electronic movement ability of the sintered blocks was reduced, leading to a significant decrease in conductivity.
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2023
·
IF 9.7
Yanan Xu,Weiqiang Wang,Fengyun Yu,Shuaikang Yang,Yonghui Yuan,Yinong Wang
Pure Fe is a potential biodegradable stent material due to its better biocompatibility and mechanical properties , but its degradation rate needs to be improved. Alloying with Zn to form Fe-Zn alloy is anticipated to meet the degradation rate requirements while retaining the iron's inherent properties. Therefore, Fe-Zn alloys with monolayered and multilayered structures were prepared by electrodeposition . The alloys' composition, microstructure, mechanical properties, in vitro degradation and biocompatibility were assessed. Results showed that the Zn content ranged from 2.1 wt% to 11.6 wt%. After annealing at 450°C, all the alloys consisted of α(Fe) solid solution and Zn-rich B2 ordered coherent phase, except for the alloy with 11.6 wt% Zn content, in which a Fe 3 Zn 10 phase appeared. The layered structure consisted of alternating columnar-grain and nano-grain layers, which compensated for the intrinsic brittleness of electrodeposited metals and improved the galvanic effect of the alloy, thus increasing the strength and plasticity and changing the corrosion from localized to uniform while augmenting the corrosion rate. The yield strength of the multilayered alloy exceeded 350 MPa, its elongation was more than 20%, and its corrosion rate obtained by immersion test in Hank's solution reached 0.367 mm·y −1 . Fe-Zn alloys with lower Zn content had good cytocompatibility with the human umbilical vein endothelial cells and good blood compatibility. The above results verified that the multilayered Fe-Zn alloy prepared by electrodeposition presented enhanced mechanical properties, higher degradation rate, uniform degradation mechanism and good biocompatibility. It should be qualified for the application of biodegradable stents. Statement of significance A potential biodegradable Fe-Zn alloy, which is difficult to be obtained by the metallurgical method, was prepared by electrodeposition to solve the low degradation rate of iron-based biomaterials. A multilayered microstructure design composed of alternating columnar-grain and nano-grain layers was achieved by changing the electrical parameters. The layered design compensated for the intrinsic poor plasticity of electrodeposited metals. It increased the galvanic effect of the alloy, thus augmenting the corrosion rate and changing the corrosion mode of the alloy from localized to uniform corrosion. The yield strength of multilayered alloy exceeded 350 MPa; its elongation was more than 20%. Moreover, the layered alloy had good cytocompatibility and blood compatibility. It indicates that the alloy is qualified for biodegradable stent application.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）