ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2026
·Vol. 48
·期 6
·250
·
IF 4.3
Ma Chuang,Liu XueMei
Lead (Pb) and cadmium (Cd) in soil threaten agroecosystem safety and human health. Due to the high bioavailability and mobility of heavy metals in red soil, the risk is further increased. Biochar is widely used for heavy metal immobilization, but original biochar suffers from inherent limitations. Most existing studies of iron (Fe)–manganese (Mn) modified biochar have not focused on red soil, and the relationship with soil–plant responses remains unclear. This study aimed to evaluate and compare the efficacy of sugarcane bagasse biochar (BC) and Fe–Mn modified sugarcane bagasse biochar (FMBC) for Pb and Cd immobilization in red soil, and clarify their effect on plant uptake. BC and FMBC were applied to Pb and Cd contaminated red soil for pot experiments with pak choi ( Brassica rapa chinensis ) as an indicator plant. The results showed that both BC and FMBC elevated soil pH, organic matter (SOM), enzyme activities, reduced Pb and Cd bioavailability, and transformed Pb and Cd to stable fractions. FMBC outperformed BC, and the 5% FMBC treatment achieved the optimal remediation efficacy. The 5% FMBC decreased the acid-extractable Pb and Cd by 9.33 and 34.40% compared to control. The plant biomass was significantly increased, Pb and Cd content in edible shoots met the limit standards, and bioconcentration (BCF) and translocation factors (TF) were lowered. Overall, this study establishes theoretical foundations and empirical bases for the application of FMBC to immobilize Pb and Cd in red soils, thereby providing a feasible and eco-friendly approach to support sustainable agriculture and the recycling of agricultural waste.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yuan Fang,Yan Zhang,Hanhan Zhu,Wenxuan Ye,Zhiting Sun,Dianmin Xia,Dekun Cen,Zhisheng Ji,Jing Lin,Jianfu Zhao,Siming Yu
Sulfur dioxide (SO 2 ) has been recognized as the fourth gasotransmitter and holds great promise for antibacterial infection therapy. However, near-infrared (NIR) laser-triggered SO 2 -releasing nanoplatforms remain underdeveloped. Herein, a raspberry-like mesoporous Fe single atom nanozyme (Fe mSAz) with NIR-II laser-reinforced peroxidase (POD)-like activity was synthesized to construct a smart SO 2 -controlled release platform. To this end, the SO 2 donor 2,4-dinitrobenzenesulfonyl chloride (DN) was first loaded into the pores of Fe mSAz with the aid of a phase change material (PCM), followed by surface functionalization with a macrophage membrane (M), yielding a biomimetic SO 2 -releasing nanozyme denoted Fe mSAz@DN@M. Upon 1064 nm laser irradiation, the photothermal effect of Fe mSAz@DN@M first induced melting of the PCM to release DN, which subsequently triggered a burst of SO 2 generation. In the meantime, 1064 nm laser irradiation enhanced the POD-like activity of Fe mSAz by generating a substantial amount of hydroxyl radical (ꞏOH). As a result, Fe mSAz@DN@M exhibited robust antibacterial efficacy through a synergistic SO 2 /ꞏOH effect. Mechanistic studies revealed that SO 2 and ꞏOH synergistically suppressed bacterial activity by amplifying bacterial ferroptosis-like death. Furthermore, due to macrophage membrane functionalization, Fe mSAz@DN@M achieved highly effective targeting of subcutaneous tissues infected with Staphylococcus aureus ( S. aureus ) in mice. Consequently, Fe mSAz@DN@M also demonstrated excellent in vivo antibacterial infection efficacy through the synergistic SO 2 and ꞏOH effect, which not only eradicated the infectious bacteria but also subsequently induced repolarization of anti-inflammatory M2 macrophages to promote wound healing. A biomimetic SO 2 -releasing Fe single atom nanozyme (Fe mSAz@DN@M) was reported. NIR-II laser irradiation controls the simultaneous release of both ꞏOH and SO 2 , which synergistically boosted the antibacterial infection efficacy of the nanozyme by amplifying bacterial ferroptosis-like death. Download: Download high-res image (163KB) Download: Download full-size image
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Yanling Wu,Hui He,Zhitong Liu,Wenkai Fu,Yue Hu,Yixuan Wang,Yijie Wang,Qin Zhang
As leading nonprecious metal electrocatalysts for ORR, Fe–N–C systems still face critical limitations. The insufficient density of accessible metal active sites and the intrinsic balance conflict between activity and durability largely constrain their practical application. In this study, we employed a coupled strategy of electrostatic assembly and defect confinement, followed by two-step high-temperature pyrolysis under distinct activation atmospheres. Cobalt clusters were in situ grown on the surface of carbon nanotubes to form a micro–nano anchoring structure with edge defects, enabling the simultaneous immobilization of Fe–N4 moieties and uniform dispersion of Co clusters on nitrogen-doped carbon nanotube substrates. The resulting nanotube-shaped Co@Fe/NC-a catalyst (prepared at 1100 °C with hydrogen activation) exhibited markedly improved ORR activity and stability in 0.1 M KOH compared with Fe/NC-a. X-ray absorption spectroscopy revealed that the Co clusters modulate the electron distribution at the Fe–N4 sites. Further, density functional theory (DFT) calculations confirmed that the Co clusters alter the electronic structure of Fe–N4 sites, reducing the reaction energy barrier and improving catalytic performance. Overall, this work offers a viable strategy for improving ORR catalysts by electronically tuning Fe–N4 sites through adjacent metal clusters.
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LANGMUIR
·
2026
·
IF 4.4
Jianguo Bai,Yanchen Zhu,Linli Qin,Hao Ren,Muhammad Wajid Ullah,Huamin Zhai
The pervasive toxicity of hexavalent chromium (Cr(VI)) to aquatic life and humans urgently demands integrated platforms capable of simultaneous detection and remediation. Herein, a bifunctional platform (CMC/PEI/MIL-53(Fe)/Nap/CP) capable of simultaneous fluorescence detection and photocatalytic removal of Cr(VI) was constructed by in situ growing MIL-53(Fe) on a carboxymethyl cellulose/polyethylenimine (CMC/PEI) matrix grafted with naphthalimide and combining it with cellulose paper (CP). In situ growth ensures the uniform dispersion of active sites, while the paper-based design enhances processability and recyclability. The protonated amino groups of PEI enrich Cr(VI) through electrostatic interactions, while MIL-53(Fe) provides photocatalytic active sites through the Fe3+/Fe2+ redox cycle. Due to the synergistic effect of adsorption and photocatalysis, the removal efficiency reached 99% within 5 h, with a reduction rate of 96%, following pseudo-first-order kinetics (k = 0.9119 h–1). Compared to other recent studies, it offers an excellent removal performance. At the same time, the enrichment effect of PEI enhanced the interaction between Cr(VI) and the naphthalimide fluorophore, achieving a detection limit of 0.34 μM and a KSV of 8.73 × 103 M–1. The good selectivity for Cr(VI) was theoretically verified through simulations by using Materials Studio software (MS). This platform provides a practical bifunctional platform for efficient fluorescence detection and removal of Cr(VI), with broad application prospects in the fields of environmental monitoring and water treatment.
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Yan Liu,Haoqing Lin,Jingnan Zou,Tenghui Yuan,Zhuohao Wang,Hang Bao,Ali Abdelhafiz,Bote Zhao
Protonic ceramic electrochemical cells (PCECs) are promising for renewable energy conversion, yet their commercialization is hindered by the limited durability and thermal expansion mismatch of commonly used Co-based air electrodes. Although Fe-based alternatives offer better thermal compatibility, they suffer from inferior oxygen reduction kinetics. Herein, we report a surface decoration strategy to address these challenges by decorating a Ba-enriched Ba1.02FeO3−δ (B1.02F) scaffold with a Co-based catalyst coating. Electron microscopy and spectroscopic characterization confirm the formation of a composite surface coating comprising Co3O4 and in situ formed Ba–Co–O species. The resulting catalyst-coated B1.02F electrode (B1.02F-CC) effectively combines the thermomechanical robustness of the Fe-based backbone with the high catalytic activity of Co species. Electrochemical analyses reveal that the catalyst coating markedly accelerates both oxygen surface exchange and charge-transfer kinetics. Consequently, single cells based on the B1.02F-CC electrode deliver a maximum power density of 1.46 W cm−2 and sustain stable operation for 600 h at 650 °C. Additionally, the single cell maintains reliable performance for 17 thermal cycles (300–650 °C) with negligible degradation. This work validates a robust surface decoration strategy to reconcile the trade-off between electrocatalytic activity and thermomechanical stability, providing a viable pathway toward durable, high-performance air electrodes for PCECs.
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Journal of Materials Research and Technology-JMR&T
·
2026
·
IF 7.3
Ming Zhang,Zhanbo Li,Zihao Li,Jingjing Xie,Weimin Wang,Zhengyi Fu
B 4 C–TiB 2 composites with enhanced mechanical properties were fabricated by a hydrolysis-based coating process, followed by ball milling with stainless-steel media, and consolidated by reactive hot pressing. Milling with 9Cr18 stainless-steel balls introduced Fe–Cr debris, which generated a liquid phase during sintering, promoting the formation of coarse, plate-like (Ti,Cr)B 2 solid-solution grains and a newly formed FeB phase. The optimal flexural strength of 745.7 ± 37 MPa is achieved, attributed to solid-solution strengthening and improved microstructural homogeneity. Meanwhile, the highest fracture toughness and Vickers hardness of 5.40 ± 0.28 MPa m 1/2 and 37.4 ± 1.3 GPa are achieved when the milling time is prolonged to 3 h, representing a 27% and 9.67% improvement, respectively, compared to the composites without ball-milling treatment. These results demonstrate that controlled introduction of Fe–Cr debris by stainless-steel ball milling enables simultaneous enhancement of flexural strength, fracture toughness, and hardness in B 4 C–TiB 2 composites through liquid-phase sintering.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuanjie Zhang,Zhongguo Wang,Yueyang Huo,Xiuping Ju,Kai Liu,Wenjun Kang,Peng Zhang,Zongge Li,Haibo Li
The development of high-performance non-noble metal catalysts for the oxygen reduction reaction (ORR) is critical for advancing electrochemical energy conversion devices. Herein, a series of Fe 1 NC-VX catalysts (X = 1, 3, 5) were synthesized via a two-step process involving solvothermal polymerization of formamide with Fe 3+ and V 5+ salts, followed by pyrolysis under N 2 atmosphere, where the content of vanadium nitride (VN) nanoparticles was regulated by adjusting the V precursor concentration. Physicochemical characterizations confirmed that Fe exists as atomically dispersed Fe N 4 sites, while VN nanoparticles are formed in V-doped samples, with Fe 1 NC-V3 exhibiting optimal Fe V synergistic interactions and a reduced Fe oxidation state. Electrochemical evaluations in 0.1 M KOH showed that Fe 1 NC-V3 delivers superior ORR activity with an onset potential of 1.02 V, half-wave potential of 0.89 V, a dominant 4-electron transfer pathway, and a low Tafel slope of 55.4 mV dec −1 , outperforming commercial Pt/C. It also exhibits excellent methanol tolerance and durability. Density functional theory (DFT) calculations revealed that VN modulates the electronic structure of Fe N 4 sites via a d -band center downshift, optimizing intermediate adsorption and reducing the rate-determining step overpotential to 0.58 eV. In practical zinc-air batteries (ZABs), Fe 1 NC-V3-based ZAB achieved a high open-circuit voltage (1.578 V), peak power density (214.1 mW cm −2 ), specific capacity (813.8 mAh g Zn − 1 ), and exceptional cycling stability. These findings demonstrate that Fe 1 NC-V3 is a competitive noble metal substitute for efficient electrochemical energy conversion.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 16
·期 12
·3783-3790
·
IF 2.131
Dong Jing,Liu Tao,Meng Xiaomeng,Zhu Jianying,Shang Kun,Ai Shiyun,Cui Shenglong
A new method based on specific binding between glycoprotein acetylcholinesterase and boronic acid-functionalized Fe@Au magnetic nanoparticles was presented for the development of acetylcholinesterase biosensor. Alginate–graphene composite-modified electrode was firstly prepared as the substrate. Then, biocompatible boronic acid-functionalized Fe@Au magnetic nanoparticles were anchored by the covalence between the cis -diol of alginate and the boronic acid group on Fe@Au nanoparticles. Acetylcholinesterase was subsequently immobilized via the bonding between the glycosyl of acetylcholinesterase and the boronic acid group. The immobilized enzyme retained relatively high bioactivity and the fabricated biosensor exhibited high sensitivity and fast response to acetylthiocholine chloride. Based on enzyme inhibition, carbamate pesticide was detected using Furadan as a model compound. Two linear ranges of 0.05–15 and 15–400 ppb were obtained with a detection limit of 0.01 ppb. The biosensor also showed acceptable reproducibility and relatively good storage stability. Moreover, satisfactory results were obtained in the real sample analysis.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2026
·Vol. 41
·期 2
·353-363
·
IF 1.4
Yan Ming,Deng Yuxiao,Yan Zhuanlong,Li Hongyu,Cao Mengyang
This study reported the synthesis of magnetic solid solutions V 2 (A x B y Sn 1− x − y )C (where A and B are Mn, Fe, or Co) MAX phases. These materials were prepared by incorporating magnetic elements into the V 2 SnC MAX phase via pressure-less sintering at 1 000 °C for 3 hours. XRD analysis reveals that the composition with x = y = 0.2 exhibits a shift of diffraction peaks to higher angles, indicating lattice parameter changes, and achieves the highest phase purity with the maximum solid solution limit, further increases in the dopant content led to the formation of impurities. While the solid solution of magnetic elements preserves the characteristic layered structure of the MAX phase, it successfully induces magnetic properties. The magnetic transition temperatures for these solid solutions ranges from 61 to 200 K. Specifically, V 2 (Mn x Co y Sn 1− x − y )C demonstrated hard magnetic characteristics, with a high saturation magnetization (6.536 emu/g) and large remanence (4.236 emu/g). In contrast, V 2 (Mn x Fe y Sn 1− x − y )C and V 2 (Fe x Co y Sn 1− x − y )C exhibits soft magnetic behavior, evidenced by their narrow hysteresis loops and low coercivity. Their saturation magnetization values are 3.80 and 1.784 emu/g, respectively. The distinctly “S”-shaped hysteresis loop of V 2 (Fe x Co y Sn 1− x − y )C further confirms its soft magnetic nature.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhenyu Shi,Wei Zhang,Chao Qin,Yan Yan,Zhanqi Gao,Liang Zhu,Chunmei Tang,Can Jin,Shaogui Yang
Developing efficient and stable catalysts for periodate (PI) activation is important for the abatement of emerging contaminants. Herein, Fe doped into polyprophyrin-based porous organic polymer (Fe@PrPOP) was prepared via a facile one-step reaction, and its catalytic capacity and reaction mechanism for PI activation were systematically investigated. Complete removal of bisphenol A (BPA) was achieved within 12 min under the Fe@PrPOP/PI system within a wide pH range (3–8), as well as no leaching of Fe was observed throughout the reaction. Nonradical pathways, including 1 O 2 and electron transfer, were identified for the BPA removal. According to substantial characterizations and density functional theory calculations, we concluded that the scattered Fe species on the surface of Fe@PrPOP were the main active sites, which was conducive to the adsorption and activation of PI. In addition, the Fe@PrPOP/PI system exhibited selective oxidation toward various organic pollutants with electron-rich moieties. Overall, this study provides a promising alternative in activating PI for the removal of organic compounds in water.
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Green Energy & Environment
·
2023
·
IF 13.3
Changjian Yuan,Xianglei Liu,Xinrui Wang,Chao Song,Hangbin Zheng,Cheng Tian,Ke Gao,Nan Sun,Zhixing Jiang,Yimin Xuan,Yulong Ding
Solar thermochemical energy storage based on calcium looping (CaL) process is a promising technology for next-generation concentrated solar power (CSP) systems. However, conventional calcium carbonate (CaCO 3 ) pellets suffer from slow reaction kinetics, poor stability, and low solar absorptance. Here, we successfully realized high power density and highly stable solar thermochemical energy storage/release by synergistically accelerating energy storage/release via binary sulfate and promoting cycle stability, mechanical strength, and solar absorptance via Al–Mn–Fe oxides. The energy storage density of proposed CaCO 3 pellets is still as high as 1455 kJ kg −1 with only a slight decay rate of 4.91% over 100 cycles, which is higher than that of state-of-the-art pellets in the literature, in stark contrast to 69.9% of pure CaCO 3 pellets over 35 cycles. Compared with pure CaCO 3 , the energy storage power density or decomposition rate is improved by 120% due to lower activation energy and promotion of Ca 2+ diffusion by binary sulfate. The energy release or carbonation rate rises by 10% because of high O 2− transport ability of molten binary sulfate. Benefiting from fast energy storage/release rate and high solar absorptance, thermochemical energy storage efficiency is enhanced by more than 50% under direct solar irradiation. This work paves the way for application of direct solar thermochemical energy storage techniques via achieving fast energy storage/release rate, high energy density, good cyclic stability, and high solar absorptance simultaneously.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Shusu Shen,Honglin Li,Yang Shen,Renbi Bai,Ganwei Zhang
Metal organic frameworks (MOFs) possess excellent post-modification characteristics, high specific surface area, diversity of skeleton composition and pore tunability, have been increasingly applied in membrane modifications. In this work, NH 2 -MIL-88B(Fe) (NM88B) was first fixed onto polyvinylidene fluoride (PVDF) membrane by polyethyleneimine (PEI) through a vacuum-assisted self-assembly process, and the deposited NM88B was subsequently grafted with perfluoroalkyl polyethoxyacetic acid (FPEOAA) via a condensation reaction to realize the surface modifications. The modified membranes (named as N1F x ) showed improved hydrophilicity and underwater-oleophobicity. In addition, very high pure water flux (up to 9403 L‧m −2 ‧h −1 ) was obtained for the N1F x membranes due to the high porosity of introduced NM88B. In the dead-end filtration experiments of n -hexadecane-water emulsion, the optimum membrane N1F20 showed a good oil rejection rate (98.3%) and high permeation flux (667 L‧m −2 ‧h −1 ) which is approximately seven times of the pure PVDF membrane, indicating that the surface-modified membranes had excellent permeability and good separation performance. Even after four filtration cycles of oil-water emulsion, the rejection rate maintained higher than 97%, showing good reusability. Furthermore, the study found that N1F20 had certain acid and alkaline resistance and great potential for engineering applications.
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