JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yimin Chen,Jiayi Niu,Chaozhong Guo,Chenyang Shu,Jianglin Chen,Jinyan Wu,Rong Jin,Yao Liu,Hao Wang,Yujun Si,Xiaoyu Dong
The development of highly active and durable carbon-based electrocatalysts for the oxygen reduction reaction (ORR) is of critical importance. In this study, a heteroatom-doped carbon catalyst (FeSn-NFC) was synthesized through the chelation of Fe 3+ and dopamine hydrochloride, followed by Sn/F co-doping and carbonization. The resulting FeSn-NFC catalyst exhibits an ultrahigh specific surface area of 2387.9 m 2 g −1 , with micropores accounting for 79 % of its structure. The incorporation of Sn enhances the pyridinic nitrogen content and facilitates the elimination of reactive oxygen species (ROS). Electrochemical evaluations reveal exceptional ORR performance, with a half-wave potential ( E 1/2 ) of 0.857 V and a minimal degradation (Δ E 1/2 = 11 mV) after accelerated aging tests. When integrated into a zinc-air battery, the FeSn-NFC catalyst delivers a peak power density of 217 mW cm −2 and an energy density of 880 Wh kg −1 (Zn), maintaining 93.2 % of its initial energy density after ∼115 h of continuous operation. This work offers a novel strategy for fabricating efficient, stable, and cost-effective ORR electrocatalysts, advancing the field of energy conversion technologies.
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INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Honghui Yan,Xiangyu Wang,Yi Zhu,Yuding Zhu,Ruiqi Xin,Shunze Zhang,Meiling Chen,Song Li,Jeonghun Kim,Wenkai Zhu
Free formaldehyde poses significant health risks as a prevalent indoor organic pollutant, driving demand for efficient and renewable adsorption solutions. While Fe-CoPBA bimetallic metal-organic frameworks show potential for formaldehyde removal, their powdered crystalline form presents practical limitations including poor recyclability and secondary contamination. Herein, we developed a novel Fe-CoPBA@bamboo composite (Fe-Co@B) through solution blending, leveraging bamboo's inherent micro-nano hierarchical pores for Fe-CoPBA encapsulation. The Fe-CoPBA nanoparticles (NPs) successfully integrated into delignified bamboo conduits through hydroxyl-mediated ligand bonding and van der Waals interactions. Formaldehyde removal tests demonstrated Fe-Co@B's dual adsorption-catalysis mechanism effectively eliminates indoor free formaldehyde. The Fe-Co@B maintained stable removal efficiency for formaldehyde through 10 regeneration cycles while preserving structural integrity. Furthermore, the Fe-Co@B exhibits high reusability along with moisture and deformation resistance. Therefore, this work contributes to solving the current problem of indoor free formaldehyde pollution and provides research ideas for the development of new functional bamboo-based products.
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ELECTROCHIMICA ACTA
·
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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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-10
·
IF 5.3
Yang Juanli,Chen Xingnu,Ji Yi,Tan Mengyuan,Hu Qin,Gao Lu,Zheng Kaiyi,Yang Zhen-quan,Li Xin,Xu Xuechao
Staphylococcus aureus , a prevalent foodborne pathogenic bacterium, poses a significant threat to human health. Herein, a dual-mode sensing method is proposed for detecting S. aureus in food using aptamer-modified Fe/Zr metal organic framework (Apt@Fe/Zr MOF). The Apt@Fe/Zr MOF was prepared through self-assembly of Fe/Zr MOF followed by surface modification with an aptamer. It exhibits peroxidase-like activity, catalyzing the 3,3′,5,5′-tetramethylbenzidine (TMB) chromogenic reaction. Meanwhile, Apt@Fe/Zr MOF demonstrates fluorescent characteristics, emitting a fluorescence signal at 428 nm upon excitation with light at 350 nm. Based on this feature, dual-mode sensing of S. aureus with comparable specificity and excellent anti-interference was achieved through the integration of colorimetry and fluorometry. The limits of detection (LOD) for both colorimetric and fluorometric analyses were 3.25 × 10 1 and 1.47 × 10 1 CFU mL −1 , respectively. Actual detection of food samples indicates that this method exhibits excellent reliability and accuracy, with recoveries ranging from 91.12 to 107.55% (colorimetry) and 94.40 to 109.47% (fluorometry). The results are highly consistent with those obtained from traditional culture-based methods. Therefore, it is evident that the dual-mode detection of S. aureus using Apt@Fe/Zr MOF offers a rapid and reliable method for ensuring food safety. Graphical
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Advanced Science
·
2025
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IF 14.1
Kai Liu,Haibing Zhu,Feng Shi,Juan Li,Xiang Li,Zijun Lai,Haibo Li,Hao Zeng,Zhanjun Yang,Huan Pang
Iron-based metal-organic framework (MOF) nanozymes have garnered considerable attention owing to a large specific surface area, adjustable porosity, large Fe-O clusters, and unsaturated Fe sites. However, the sluggish charge-transfer rate and restricted active sites of the nanozymes lead to poor enzyme-like activity and further impede their biomimetic catalysis. Herein, a three-channel electron-engineered Fe-88A@CeO 2 /carbon dots (Fe-88A@CeO 2 /CDs) nanozyme is proposed for efficient biomimetic catalysis. Fe-88A@CeO 2 /CDs nanozyme is prepared by incorporation of CeO 2 and CDs into the porosity of Fe-88A. Specifically, the original Fe (II)/Fe (III) and the introduced Ce (III)/Ce (IV) redox couples of the nanozyme constitute a dual electron transfer channel. Furthermore, the presence of CDs produces another electron transfer channel. The three-channel electron engineering strategy for nanozymes can accelerate the electron transfer process accompanied with more active sites, thereby greatly enhancing the oxidase-like activity of Fe-88A@CeO 2 /CDs for biomimetic catalysis. The nanozyme can efficiently convert oxygen to · O 2 − ${\mathrm{O}}_2^ - $ , oxidizing colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue ox-TMB, and meanwhile the ox-TMB effectively quenches the fluorescence of CDs. As proof of concept, the nanozyme is utilized to construct a colorimetric-fluorescence bimodal immunosensor for monitoring Staphylococcal enterotoxin B with excellent performance. This work provides promising insight into designing excellent nanozymes for effective biomimetic catalysis in various fields.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yiming Wang,Jin Chen,Jianye Shi,Jing Zhang,Yuzhao Ma,Xiaofeng Yang,Yanjun Li
The integration of microscopic material designs and macroscopic structural layouts offers unlimited potential for developing advanced electromagnetic wave (EMW) absorbers. Herein, a pyrolysis-based strategy is reported for the hybridization of Ti 3 C 2 T x MXene nanosheets to achieve relaxation processes and high-density magnetic coupling at the nanoscale. The stratified structure of Ti 3 C 2 T x /Fe-MOF considerably amplifies the active contact region with electromagnetic radiation, thereby inducing numerous reflection/scattering phenomena. Through pyrolytic transformation, derived nanoparticles including Fe, C, Fe 3 O 4 , and TiO 2 establish continuous metal–carbon and carbon-oxide interfaces below 50 nm. Consequently, the heterogeneous interfaces formed between these components establish a harmonious electromagnetic coupling network, where interfacial polarization from numerous heterojunctions promotes charge accumulation and relaxation processes, converting electromagnetic energy into thermal energy. Remarkably, findings indicate that this composite material demonstrates a minimum reflection loss (RL min ) of −47.05 dB when the thickness reaches 1.8 mm. Additionally, this investigation broadens the spectrum of design strategies for premium microwave absorption materials through systematic interface engineering and thermally-controlled phase conversion.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhaomin Lu,Guang Li,Kuang Sheng,Ting Wu,Wenwen Luo,Hu Zhou,Qingfeng Yi
Further enhancing the electrocatalytic performance of transition metal sulfides for oxygen evolution and oxygen reduction reactions (OER and ORR) is crucial for the development of high-efficiency electrochemical energy devices. Here, the highly efficient iron-doped nickel sulfide/cobalt sulfide heterostructure catalyst (Fe-NiS 2 /CoS 2 ) was successfully prepared via a combination of hydrothermal-sulfidation-reduction strategy. Physical characterizations coupled with electrochemical tests reveal that Fe doping plays a key role in the excellent performance of Fe-NiS 2 /CoS 2 by lowering charge transfer resistance, optimizing electronic structure, and promoting reaction kinetics synergistically. As a result, the Fe-NiS 2 /CoS 2 catalyst exhibits a bifunctional electrocatalytic reactivity with a low ΔE of 0.61 V, surpassing noble-metal-based catalyst and most of the reported iron-related sulfide bifunctional catalysts. Specifically, the catalyst exhibits low overpotentials of 265 mV at 10 mA cm −2 and 381 mV at 100 mA cm −2 for the OER, while maintaining an ORR E 1/2 of 0.88 V. Aqueous zinc-air battery (ZAB) based on Fe-NiS 2 /CoS 2 achieve the specific capacities of 678.5 mAh g Zn −1 and along with 200 h cycling stability. This work provides an effective approach to improving transition metal sulfides, with potential for broader application in OER/ORR-related energy technologies.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Qingtao Zeng,Bingjie Zhang,Shengzhi Jiao,Mingyue Gao,Ruyu Li,Haiyan Xiao,Longgang Wang
The emergence of nanozymes based on metal-organic frameworks has successfully addressed some limitations of natural enzymes. ZIF-8 is a framework with high pore rate consisting of Zn 2+ and 2-methylimidazole, but its catalytic activity is limited. In this study, a new metal organic framework named ZIF-8 (FM) was prepared by doping iron and manganese in ZIF-8, which exhibited enhanced catalytic performance. ZIF-8(FM) showed the peroxidase-like (POD-like) activity by oxidizing chromogenic substrates and was capable of colorimetric detection of dopamine in actual samples. In addition, in order to improve the photothermal conversion efficiency, ZIF-8(FM) was wrapped with polydopamine (PDA) to prepare ZIF-8(FM)@PDA. The antibacterial experiments of Escherichia coli and Staphylococcus aureus showed that ZIF-8(FM)@PDA had strong antibacterial effect. Nanomaterials based on ZIF-8(FM) have great potential in dopamine detection and effective photothermal antibacterial treatment.
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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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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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NMR IN BIOMEDICINE
·
2025
·Vol. 38
·期 9
·e70116
·
IF 2.7
Fei-Xiang Hu,Deng-Deng Liu,Xiao-Wen Ma,Pu-Yeh Wu,Wei-Jun Peng,Dan Wang,Tong Tong
This study aims to design and evaluate a two-dimensional Ti 3 C 2 -MXene contrast agent, codoped with iron and manganese, with the aim of achieving T 1 /T 2 dual-mode magnetic resonance imaging contrast, and to investigate its effect on Chemical Exchange Saturation Transfer (CEST) contrast agents. Single-layer Ti 3 C 2 was synthesized via the HCL/LiF etching technique, with the flake size subsequently tailored and the hydroxylated surface modified through a hydrothermal process. Fe 3 O 4 nanoparticles and MnO 2 nanosheets were integrated onto the two-dimensional Ti 3 C 2 -MXene surface using an in situ doping approach, and the final modification was achieved with carboxymethyl chitosan. Various characterization techniques were employed to assess the physical and chemical properties of the probe, which were then combined with a CEST contrast agent to investigate the mechanisms of multimodal magnetic resonance imaging and in vitro photothermal effects. Upon integrating the multi-modal molecular probe with Ioversol for imaging purposes, at a magnetic field strength of B 1 = 1.25 μT and with a molecular probe concentration of 0.5 mg/mL, the CEST signal from Ioversol is almost entirely suppressed. This allows for the successful identification of a distinct concentration range where both contrast agents can coexist. In vitro photothermal studies on MXene codoped with iron and manganese have shown that the composite molecular probe exhibits excellent photothermal efficiency. The method combining complex nanoprobes with CEST contrast agents successfully achieved simultaneous imaging of both contrast agents. In vitro MRI experiments successfully obtained distinguishable concentration ranges for both, with changes in CEST signals reflecting the concentration variations of the complex molecular probes, which also exhibit good photothermal therapy (PTT) capabilities.
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BIOSENSORS & BIOELECTRONICS
·
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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