ELECTROCHIMICA ACTA
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2025
·
IF 5.6
Lilai Lu,Guoyu Wang,Yangfan Sun,Qingshan Li,Ting Pan,Yuanna Sun
The development of effective oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts is essential for the preparation of high-performance rechargeable zinc-air batteries. Porous carbon nanosheets (Fe/NSCN-900) doped with three elements, Fe, N, and S, were prepared from bacterial cellulose using a simple high-speed mixing-impregnation-high-temperature pyrolysis method for use as highly active electrocatalysts in rechargeable zinc-air batteries. The two-dimensional porous structure of Fe/NSCN-900 grants the material a high electrical conductivity and a large specific surface area, which is conducive to catalysis. The synergistic effect between Fe, N, and S elements endows Fe/NSCN-900 with exceptional ORR and OER electrocatalytic properties. The prepared Fe/NSCN-900 showed good bifunctional electrocatalytic activity with an OER overpotential of 310 mV (η 10 = 310 mV vs. RHE) at a current density of 10 mA cm −2 and obtained high ORR onset potential (0.94 V) and half-wave potential (0.82 V). In addition, when a rechargeable zinc-air battery assembled from Fe/NSCN-900 at a current density of 10 mA cm −2 underwent 1200 cycles (over 400 h), the charging and discharging voltage gaps remained nearly unchanged. This research paves the way for the development of high-performance bifunctional electrocatalysts for next-generation energy conversion and storage devices.
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BIOSENSORS & BIOELECTRONICS
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2025
·
IF 10.5
Dongmei Liu,Xinhui Jiang,Xiaoming Li,Hecun Zou,Lin He,Zhengwei Zhang,Siqiao Li,Xintong Bian
Diethylstilbestrol (DES), a synthetic estrogen, is associated with severe endocrine disruption and carcinogenic risks, posing persistent biological and environmental hazards. Herein, a bimetallic Fe/Eu–based metal–organic framework (Fe/Eu–MOF) with distinct multi–emission properties was developed as a ratiometric fluorescent sensor for sensitive and intelligent visual detection of DES. The Fe/Eu–MOF exhibited stable red emission at 615 nm and DES–responsive blue emission at 410 nm, enabling self–referenced quantification. The sensor showed two linear ranges (0.005–2 and 2–30 μg/mL), a low detection limit (1.78 ng/mL), and excellent selectivity against potential interferents. Its practicality was validated in milk and shrimp, demonstrating excellent recovery and reproducibility. Additionally, a paper–based sensor integrated with smartphone RGB analysis enabled rapid, on–site, and instrument–free detection. Mechanism studies revealed that DES coordination with Fe centers suppressed non–radiative decay and enhanced fluorescence. This work provides a robust and intelligent platform for portable monitoring of DES residues, offering significant potential for real–time biohazard surveillance and visual diagnostics in resource–limited settings.
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LANGMUIR
·
2025
·
IF 3.9
Yuanbo Li,Taiming Zhang,Yanru Ding,Yuhao Chen,Yukui Rui
The iron-based metal–organic frameworks (Fe-MOFs) NH2-MIL-101(Fe) (MIL) has gained widespread attention as a drug carrier material in agriculture. In this study, a multifunctional nanocomposite, MIL@A@D@C, was successfully synthesized by loading the fungicide azoxystrobin (AZOX) and immunoinducer d-cellobiose (D) onto MIL, followed by surface modification with carboxymethyl cellulose (CMC). The loading capacity of MIL was optimized by varying solvent conditions and the mass ratio of MIL to AZOX, revealing that ethanol as the reaction solvent and a MIL: AZOX mass ratio of 1:4 resulted in the highest loading efficiency (6.73%). MIL@A@D@C exhibited pH- and cellulase-responsive controlled release behavior. In vitro antifungal assays demonstrated that MIL@A@D@C at a low concentration of 1 ppm effectively inhibited Colletotrichum graminicola (the causal agent of maize anthracnose). Foliar application experiments further confirmed that the composite formulation achieved significant inhibition at a low dosage of 10 ppm, outperforming commercial azoxystrobin products. Plant and animal safety assessments indicated that MIL@A@D@C possessed enhanced biosafety. These findings highlight the potential of MIL@A@D@C as an environmentally friendly and highly effective nanodelivery system for crop disease management.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Weiju Hao,Dongxue Yao,Qiuyu Xu,Ruirui Wang,Chenglong Zhang,Yanhui Guo,Ruimin Sun,Mingxian Huang,Ziliang Chen
The aggregation of transition metal nanoparticles severely degrades their catalytic activity towards water splitting. Although this issue can be alleviated by the popular carbon-hybridization and metal foam-confinement strategies, the complicated fabrication procedure and the support corrosion parasitic in these strategies inevitably result in high usage cost and unsatisfactory cycle durability. Herein, we in-situ space-confined boron-inserted Fe-Ni solid solution nanosheets onto the activated hydrophilic sponge (B-FeNi@HS) via substitution of Fe by Ni and insertion of B within the Fe lattice interstitials in the presence of NH 4 + -modified dimethylamino borane solution. When served as the bifunctional electrocatalysts, B-FeNi@HS only needs overpotentials of 54 and 171 mV to afford 10 mA cm –2 for HER and OER in 1.0 M KOH, respectively. In addition, the alkaline overall-water splitting system constructed by using B-FeNi@HS as two-electrodes only delivers an ultralow cell voltage of 1.456 V to drive 10 mA cm –2 , and shows negligible activity decay even at 500 mA cm –2 for 3 days. Such outstanding performance can be traced to the synergism of corrosion-resistant support, hierarchical morphology with favorable surface area and dual solid-solution crystal structure, ensuring robust mechanical stability, rapid charge/mass transfer kinetics as well as the energetically favorable formation of intermediates during catalysis. The proposed strategy is versatile and can be extended to synthesize other efficient B-inserted Fe-based electrocatalysts.
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Chem
·
2022
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IF 25.832
Xiaoqian Wei,Shaojia Song,Weiwei Cai,Xin Luo,Lei Jiao,Qie Fang,Xiaosi Wang,Nannan Wu,Zhen Luo,Hengjia Wang,Zhihong Zhu,Jing Li,Lirong Zheng,Wenling Gu,Weiyu Song,Shaojun Guo,Chengzhou Zhu
The development of Fe single-atom catalysts is greatly impeded by their lower oxygen reduction reaction (ORR) performance in acid electrolytes when compared with Pt/C catalyst. Herein, we report an unprecedented ORR catalyst consisting of Pd nanoclusters (Pd NC ) and Fe single atoms (Fe–N–C/Pd NC ). Experimental investigations and theoretical calculations indicate that the enhanced ORR activity results from the Pd NC -induced spin-state transition of Fe(II) from low spin to intermediate spin, activating O–O bond through the side-on overlapping and achieving the pathway transition from associative to dissociative process. The over-binding of OH∗ can be facilely released to suppress the site-blocking effect and accelerate the removal of OH∗. In acid conditions, Fe–N–C/Pd NC exhibits excellent ORR performance with impressive half-wave potential (0.87 V), insignificant decay after 30,000 cycles, and a high maximum power density of 920 mW/cm 2 in fuel cell, superior to Pt/C catalyst. This work provides an efficient pathway to design non-Pt catalysts through the spin-regulation strategy.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Shengjia Ma,Bingtao Dong,Yuxin Zheng,Shuai Tang,Tao Zhang,Yaping Zhao
This work elucidated the dual-substrate activation mechanism of a Fenton-like system, enabled by the upcycling of plastics into a highly efficient catalyst. A synergistic pyrolysis strategy was employed to upcycle polyethylene microplastics into nitrogen-doped carbon while simultaneously constructing Fe clusters and WS 2 co-catalyst (WS 2 /Fe-N-C). In the H 2 O 2 activation system, WS 2 /Fe-N-C achieved a remarkable rate constant of 0.949 min −1 toward bisphenol A, which was 52 times higher than that of Fe-N-C, outperforming previously reported representative co-catalyst systems and Fe-based carbon catalysts. Correlation analysis, electrochemical tests and theoretical calculations demonstrated that Fe sites primarily activated H 2 O 2 to generate •OH, while WS 2 adsorbed bisphenol A and facilitated a non-radical electron transfer pathway, enabling dual-substrate synergistic catalysis for highly efficient pollutant removal. This work provides a feasible strategy for plastic upcycling and offers innovative insights into the synergy between metal centers and cocatalysts, paving the way for the rational design of high-performance catalysts.
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Small
·
2025
·
IF 12.1
Hui-Min Xu,Kai-Hang Yue,Hong-Cheng Zhang,Xiao-Qi Gong,Shao-Lan Zheng,Meng-Han Yin,Guang-Hui Xia,Gao-Ren Li
In recent years, zinc-air battery (ZAB) has received great attention because of their high energy density, low manufacturing cost, environmental friendliness, and high safety. The main obstacle to the widespread use of ZAB is the design and preparation of low-priced and high-performance electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, the paired Fe single-atoms with Se, N-atom coordination supported on N, S-codoped carbon (FeN x Se y @SNC) are designed and synthesized as catalyst for ZABs. The physical and chemical characterizations indicate the existence of paired Fe single-atoms. The FeN x Se y @SNC exhibits exceptional ORR catalytic activity with a half-wave potential ( E 1/2 ) of up to 0.92 V RHE and an onset potential ( E onset ) of 1.057 V RHE and a overpotential of 346 mV for OER at 10 mA cm −2 . The FeN x Se y @SNC-based ZAB shows a high peak power density of 307 mW cm −2 at 475 mA cm −2 , a high specific energy density of 760.9 mAh g −1 at 10 mA cm −2 , and superior long-term durability. DFT reveal that the asymmetric Fe─Se─Fe bridging bonds and S-atom coordination in the Fe 2 N 5 SeS allow precise control of Fe active sites, and can well modulate the electronic properties of Fe sites, optimize the adsorption energies of oxygen intermediates and improve catalytic performance.
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Nanomaterials
·
2025
·Vol. 15
·期 19
·1465
·
IF 4.3
Nannan Zheng,Yulan Zhang,Chunlei Dong,Zhiming Chen,Jianbin Chen
Fe–porphyrin/g-C3N4composites have emerged as promising visible-light photocatalysts, but their performance remains limited by inefficient charge separation and low reactive oxygen species (ROS) yield. Here, iron–tetra(4-carboxyphenyl) porphyrin (Fe–TCPP) was coupled with g-C3N4nanotubes (CNNTs) via a facile self-assembly strategy, creating a morphology-coordinated system. Comprehensive characterization (XRD, FTIR, SEM/TEM, BET, UV–Vis diffuse reflectance, PL, XPS, and EPR) confirmed the structural integrity, electronic coupling, and ROS generation capability of the composites. Fe–TCPP incorporation narrowed the bandgap from 2.78 to 2.56 eV, prolonged the average carrier lifetime from 6.3 to 7.5 ns, and significantly enhanced the generation of •OH and1O2. The optimized 1 wt% Fe–TCPP@CNNTs achieved complete Rhodamine B degradation within 30 min under visible light, with the highest two-stage apparent rate constants (k1= 0.0964 min−1, k2= 0.328 min−1). In addition, the hybrids retained over 90% activity after six consecutive runs, confirming their stability and recyclability. The synergistic effect of Fe–N coordination and nanotubular architecture thus promotes light harvesting, charge separation, and ROS utilization, offering a promising design principle for high-performance photocatalysts in environmental remediation.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Danni Deng,Rong Chen,Qianqian Zhong,Binbin Xiong,Jia Deng,Na Zhang,Shiwei Xie
Bicarbonate ions (HCO 3 − ), commonly present in natural water sources, exert complex influences on peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). This study investigates the role of HCO 3 − in a novel electrochemical system using a stainless-steel scrubber cathode (SSSC) for PMS activation. The buffering effect of HCO 3 − shifts the dominant Fe(II) species from dissolved Fe 2+ ions to surface-bound Fe(II) (≡Fe(II)) within the HCO 3 − /PMS/SSSC system. Furthermore, HCO 3 − promotes ≡Fe(II)/≡Fe(III) redox cycling on the SSSC surface. These synergistic effects significantly enhance PMS activation, generating singlet oxygen ( 1 O 2 ) and Fe IV O as the primary oxidants responsible for BPA degradation. Identification of degradation intermediates elucidated two dominant pathways: hydroxylation and radical coupling. Toxicity assessment of these intermediates confirmed reduced environmental risks. The SSSC exhibited long-term stability and effective performance in real water matrices, demonstrating its practical applicability.
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Pharmaceutics
·
2025
·Vol. 17
·期 10
·1257
·
IF 5.5
Jialing Li,Ning Han,Mingyue Ruan,Hongmei Wei,Yunan Dong,Haitong Zhang,Zishuo Guo,Shouying Du,Pengyue Li
Background/Objectives:Triple-negative breast cancer (TNBC) exhibits pronounced biological heterogeneity, aggressive behavior, and a high risk of recurrence and metastasis. The conventional treatments for TNBC have notable limitations: surgical resection may leave residual tumor cells; chemotherapy (CT) frequently induces systemic toxicity and drug resistance; and radiotherapy damages surrounding organs and compromises the patients’ immune function.Methods: Herein, we designed a carrier-free nanodrug delivery system composed of self-assembled Curcumin nanoparticles (NPs) coated with a tannic acid (TA)/Fe(III) network (denoted as CUR@TA-Fe(III) NPs). We systematically evaluated the in vitro cytotoxicity and photothermal–ferroptosis synergistic therapeutic efficacy of CUR@TA-Fe(III) NPs in 4T1 breast cancer cells, as well as the in vivo antitumor activity using 4T1 tumor-bearing mouse models.Results:CUR@TA-Fe(III) NPs had high drug loading efficiency (LE) of 27.99%, good dispersion stability, and photothermal properties. Curcumin could inhibit the growth of 4T1 cancer cells, while TA-Fe(III) efficiently converted light energy into heat upon exposure to near-infrared (NIR) light, leading to direct thermal ablation of 4T1 cells. Additionally, TA-Fe(III) could supply Fe(II) via TA, increase intracellular Fe(II) content, and generate reactive oxygen species (ROS) through the Fenton reaction, in turn inducing lipid peroxidation (LPO), a decrease in mitochondrial membrane potential (MMP), and glutathione depletion, eventually triggering ferroptosis.Conclusions:This treatment strategy, which integrates CT, PTT, and ferroptosis, is expected to overcome the limitations of traditional single-treatment methods and provide a more effective method for the treatment of TNBC.
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ENERGY & FUELS
·
2016
·
IF 2.835
Zuowang Wu,Chong Chen,Hui Wan,Lei Wang,Zhong Li,Bingxue Li,Qirui Guo,Guofeng Guan
A magnetically recyclable and efficient catalyst for biodiesel synthesis was fabricated by confining the Brønsted ionic liquid 1,4-butanediyl-3,3′-bis(3-sulfopropyl) imidazolium dihydrogensulfate in an amino-functionalized magnetic metal–organic-framework composite (Fe3O4@NH2-MIL-88B(Fe)) through a simple and efficient strategy via the amino groups. The catalyst was systematically characterized, proving ionic liquid was grafted in the amino-functionalized carrier, and the catalyst was spindle-shaped with superparamagnetism (7.2 emu/g). The prepared catalyst with high acidity (1.76 mmol H+ g–1) exhibited good catalytic activity in biodiesel synthesis from oleic acid and ethanol with a yield of 93.2%, optimized by Box-Behnken response surface methodology. The fine catalytic performance of the catalyst was mainly due to the combination of the characteristics of the ionic liquid and the structure of Fe3O4@NH2-MIL-88B(Fe). Moreover, the catalyst was recycled without significant loss of activity after being used for six runs and could be magnetically separated in magnetic force without obvious mass loss.
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CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Ying Fang,Jia Wen,Guangming Zeng,Feiyue Jia,Siyu Zhang,Zhilong Peng,Haibo Zhang
Four microporous MIL-100(Fe) metal–organic frameworks (MOFs) synthesized with or without mineralizing agents by hydrothermal method were evaluated for their characteristics, water stability and adsorption performance towards Cr(VI). In the study, we compared two traditional mineralizing agents (i.e. hydrofluoric acid (HF) and tetramethyl ammonium hydroxide (TMAOH)) and an environmental-friendly mineralizing agent sodium carbonate (Na 2 CO 3 ) for the likelihood of quality improvement of MIL-100(Fe). Results showed that MIL-100(Fe) prepared using Na 2 CO 3 mineralizing agent exhibited excellent physicochemical property and higher adsorption capacity for Cr(VI) than the others. The adsorption of Cr(VI) on MIL-100(Fe)_Na 2 CO 3 fitted better with Langmuir isotherm model and pseudo first-order kinetics model. Desorption and regeneration of used MIL-100(Fe)_Na 2 CO 3 were achieved using NaOH (0.01 M) with a high desorption efficiency of 73% in four hours. Based on the improved structural characteristics and excellent adsorption performance of MIL-100(Fe)_Na 2 CO 3 , using the environmental friendly and low-cost Na 2 CO 3 as mineralizing agent could be an alternative and preferred pathway in the preparation of MOFs materials.
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