Nanomaterials
·
2026
·Vol. 16
·期 4
·250
·
IF 4.8
Yingxing Yang,Yihan Zheng,Mengyao Zhao,Xiaomei Yu,Songjie Li,Jinyou Zheng
As a renewable energy source, solar energy holds significant potential for addressing future energy and environmental challenges. Concurrently, hydrogen (H2), as a clean and renewable energy carrier, has garnered substantial attention. Photoelectrocatalytic water splitting to produce H2represents an emerging green technology for converting solar energy into hydrogen energy, which has been highly valued by researchers. The key to advancing this technology lies in identifying photoelectrode materials with high catalytic activity and stability. In this study, dendritic α-Fe was synthesized via electrodeposition at the optimal potential of −1.4 V vs. Ag/AgCl for 300 s, and the photoelectrocatalytic performance of α-Fe2O3@Fe was enhanced through partial oxidation annealing at 300 °C for 6 h. This approach effectively addressed the issue of the short carrier transport distance in α-Fe2O3. The resulting partially oxidized α-Fe2O3@Fe(300 °C, 6 h) exhibited a photocurrent density of 281.1 μA/cm2at +0.55 V vs. Ag/AgCl, which was 2.23 times higher than that of the fully oxidized dendritic α-Fe2O3(500 °C, 2 h) (125.8 μA/cm2). The influence of deposition potential on photoelectrocatalytic performance was systematically explored, and the optimal deposition potential was identified. Additionally, surface modification with 0.15 wt% Pt (ultra-low loading) was employed to further improve the photocatalytic stability of α-Fe2O3(500 °C, 2 h). After continuous operation for 2 h, the photocurrent of the surface-modified sample decreased by only 6.5%, indicating a substantial enhancement in stability.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zihao Wei,Qian Wu,Shiyu Fang,Xiang Zou,Ran Yu,Jiashun Cao,Lianghu Su,Weijing Liu,Song Cheng,Jingyang Luo
Digestate-derived biochar (BC) and an FeCl 3 /KOH-modified biochar (FKBC) were evaluated for ciprofloxacin (CIP) removal from nutrient-rich wastewater. FeCl 3 /KOH modification increased the specific surface area from 76.3 to 176.1 m 2 /g and introduced abundant oxygen-containing functional groups with dispersed Fe O coordination sites. Consequently, FKBC exhibited a Langmuir adsorption capacity of 117.93 mg/g, representing a 91.1% enhancement over pristine BC. Adsorption kinetics of FKBC were well described by the pseudo-second-order model (R 2 ≈ 0.99), with higher rate constants and initial adsorption rates, indicating accelerated chemisorption. FKBC further enabled simultaneous removal of ammonium and phosphate (∼60% at 20–120 mg/L). Adsorption was pH-dependent, favoring acidic conditions. XPS/FTIR analyses combined with density functional theory (DFT) calculations revealed that CIP adsorption is primarily governed by inner-sphere Fe O coordination and carboxylate complexation, with carbonyl anchoring and π-π interactions contributing at higher surface coverage. Stable Fe 2p features before and after adsorption indicate reversible surface coordination without alteration of iron chemical states, supporting low iron-leaching risk. A ranking efficiency product (REP) analysis yielded an overall sustainability score of 85%, highlighting FKBC as an efficient and sustainable adsorbent for antibiotic remediation and resource-oriented digestate valorization.
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ACS Catalysis
·
2026
·
IF 13.6
Mengqi Ding,Xinhong Zhao,Yanru Li,Xuefeng Long,Hongwei Li,Dong Ji,Guixian Li
Iron-containing zeolites have shown great potential in catalyzing phenol hydroxylation with H2O2 to produce dihydroxybenzenes (catechol and hydroquinone). However, their industrial application has been hindered by low selectivity and the complexity of active-site identification. This study addresses these challenges by synthesizing a series of Fe-ZSM-5 catalysts with iron contents up to 4 wt % via an ionic liquid-assisted interzeolite transformation route. Through systematic regulation of transformation temperature and calcination atmosphere, combined with an acid treatment step, a catalytically inert benchmark sample (T180-Air) was strategically prepared and compared with three active variants (T200-Air, T180-N2, T200-N2) to achieve the isolation and identification of active sites. Employing a “differential comparison strategy”, combined with DR UV–vis, Raman, Mössbauer, XANES/EXAFS, EPR, H2-TPR, in situ FT-IR characterizations, and DFT calculations, we systematically excluded the possibility of binuclear iron species, small FexOy clusters, and distorted tetrahedral iron as primary active sites. The evidence consistently points to extra-framework octahedrally coordinated mononuclear iron as the key active species, which effectively activates both phenol and H2O2 to generate reactive intermediates. Moreover, the high-selectivity formation of dihydroxybenzenes is driven by a synergistic interaction between these mononuclear octahedral iron sites and neighboring strong acid centers. The optimal catalyst (T200-Air) achieved a phenol conversion of 46.7% and a dihydroxybenzene selectivity of 95.6% under dark conditions, with its dihydroxybenzene selectivity surpassing that of state-of-the-art Fe-based catalysts at comparable phenol conversion levels. This work elucidates the critical importance of the synergistic design between the active iron species and the local acidic microenvironment, providing clear experimental evidence and structure-performance guidelines for the rational design of high-performance iron-zeolite catalysts for selective phenol hydroxylation reactions.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yulong Xiang,Xinbin Ji,Xiaoli Dong,Yu Wang,Nan Zheng,Jialin Niu,Pei Yu,Chumin Yan
As Cr(VI) pollution intensifies, the development of efficient, eco-friendly, and sustainable treatment technologies has become a vital focus in environmental science. Photocatalytic reduction is often seen as a promising approach for removing Cr(VI), thanks to its low energy requirements and minimal environmental impact. However, traditional photocatalytic materials face significant challenges, including narrow photoresponse range and high rate of electron-hole recombination, which impede their practical efficiency. In this study, we successfully synthesized Fe-DUT-67 photocatalysts by incorporating Fe single atoms into the zirconium-based metal–organic framework (DUT-67) through post-synthetic modification. A significant enhancement in both the visible-light absorption capacity and carrier separation efficiency of the as-prepared Fe-DUT-67 has been observed, attributed to the formation of Fe-O coordination bonds between the Fe atoms and Zr-O clusters. Fe-DUT-67-2 exhibited impressive Cr(VI) reduction activity under full-spectrum illumination, with a remarkable 90% reduction efficiency of Cr(VI) within 18 min. Density functional theory (DFT) calculations shed light on the crucial role of Fe sites in promoting photoelectron transport and facilitating Cr(VI) reduction. This work not only presents an efficient photocatalytic material for alleviating Cr(VI) pollution but also provides a theoretical foundation and design principles for the development of high-performance catalytic systems utilizing single-atom modified metal–organic frameworks.
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Molecular Catalysis
·
2026
·
IF 4.3
Chao Wang,Ting Fan,Shunfang Lv,Tianfu Zhang,Juan Zhang,Jiangang Chen
A series of hydrophobically modified MnO 2 -coated Fe 3 O 4 (Fe@Mn) catalysts were prepared to investigate the effect of the interaction strength between Fe@Mn and hydrophobically modified SiO 2 (SiO 2 -c) on their physicochemical properties, FTS performance and CO 2 selectivity, including granule mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (g)), powder mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (p)) and core-shell structure of Fe@Mn@SiO 2 -c. The interaction between Fe@Mn and SiO 2 -c evolves and strengthens with the structural progression from physically mixed to core-shell configurations. Contact angle measurements indicate that Fe@Mn@SiO 2 -c exhibits superior hydrophobicity compared to Fe@Mn+SiO 2 -c (g/p). Fe@Mn+SiO 2 -c (g/p) maintains a CO 2 selectivity comparable to that of Fe@Mn, while exhibiting significantly enhanced stability. Although Fe@Mn@SiO 2 -c shows a relatively lower CO conversion, it achieves the lowest CO 2 selectivity alongside a higher selectivity for light olefins. The study reveals that the altered surface microenvironment of Fe@Mn@SiO 2 -c is the key factor in suppressing the water-gas shift (WGS) reaction activity during FTS, thereby reducing CO 2 selectivity. This work elucidates the underlying mechanism by which the interaction mode between the Fe-based catalyst and the hydrophobic material influences the FTS performance, particularly the CO 2 selectivity.
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RARE METALS
·
2026
·Vol. 45
·期 10
·e70590
·
IF 12.1
Beirong Ye,Chen Li,Xinhui Xia,Tengfei Zhang,Yongqi Li,Qing Li,Shangkun Jiang,Yizhong Huang,Lingjie Zhang,Xinqi Liang,Chiam Wen Liew,Yongqi Zhang
en This link goes to a English section zh This link goes to a Chinese section Improving the efficiency and stability of oxygen evolution electrocatalysts remains essential for advancing water splitting technologies. Although in situ surface reconstruction into active phases is desirable, it often leads to uncontrolled structural degradation. Herein, we demonstrate that lattice doping of Fe into Ni 2 Te 3 O 8 (NTO) pre-catalysts triggers a self-terminating surface reconstruction during OER. The deliberate incorporation of Fe introduced a higher density of unsaturated surface coordination sites and weakened the local surface crystallinity, which collectively accelerated the oxidative transformation of the NTO into an oxyhydroxide-rich active layer during electrocatalysis. During the reconstructive process, soluble tellurium species released from the host framework spontaneously adsorbed onto the evolving surface and subsequently served as stabilizing anionic units, contributing to the structural integrity of the metastable oxyhydroxide phase. Benefiting from this self-terminating mechanism, the optimized Fe-NTO catalyst exhibited remarkable oxygen evolution activity, requiring only 220 mV of overpotential to deliver a current density of 50 mA cm −2 , along with exceptional operational durability exceeding 200 h at the same current. This work highlights the critical role of doping and anionic regulation in controlling reconstruction dynamics and establishes a novel paradigm for designing durable, high-performance electrocatalysts. 摘要 en This link goes to a English section zh This link goes to a Chinese section 提升析氧反应(OER)电催化剂的效率与稳定性对推进水分解技术发展至关重要。尽管原位表面重构能够生成高活性相,但其过程常伴随不可控的结构衰退。本文报道,在Ni 2 Te 3 O 8 (NTO)预催化剂中晶格掺杂铁,可在OER过程中触发自终止的表面重构。Fe的引入增加了不饱和配位位点密度并降低了表面晶格有序性,共同促进了NTO在电催化过程中向富含羟基氧化物的高活性表面层转化。在重构过程中,从主体骨架释放的可溶性碲物种自发吸附于动态演化的表面,并作为稳定阴离子单元,有效增强了亚稳态羟基氧化物相的结构完整性。得益于该自终止机制,优化后的Fe-NTO催化剂表现出卓越的析氧性能,仅需220 mV过电位即可实现50 mA cm −2 的电流密度,并在该电流下保持超过200小时的持续稳定运行。本研究揭示了掺杂与阴离子调控在控制表面重构动力学中的关键作用,为设计高性能、长寿命电催化剂提供了新思路。
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Saijia Dong,Renyuan Yang,Xiaonan Liu,Yue Wang,Yupeng Hu,Daohai Zhang,Teng Zhou
Lightweight, ultrathin, and absorption-dominated electromagnetic interference (EMI) shielding materials are highly desired to alleviate secondary electromagnetic pollution caused by conventional reflection-dominated shielding materials. Herein, Fe(acac) 3 -assisted PAN-derived porous carbon membranes were fabricated through nonsolvent-induced phase separation (NIPS), freeze-drying, and high-temperature carbonization to achieve efficient absorption-dominated EMI shielding performance. The interconnected porous conductive carbon framework facilitated the dissipation of incident electromagnetic waves by providing continuous conductive channels and abundant internal scattering interfaces. Different Fe(acac) 3 contents were introduced to evaluate their influence on graphitization degree, electrical conductivity, and EMI shielding performance. Notably, with only 1 wt% Fe(acac) 3 loading, the obtained C-P-P/AcFe-2 membrane with a thickness of only 0.42 mm exhibited the best overall shielding performance, including an electrical conductivity of 7.12 S mm −1 , exhibiting an average EMI shielding effectiveness of 94.9 dB and a corresponding SE A value of 80.2 dB in the X-band. The SE A /SE R ratio reached 5.5, indicating obvious absorption-dominated shielding behavior. Meanwhile, the SSE t value reached 4013.4 dB cm 2 g −1 , demonstrating its lightweight shielding capability. This work provides a feasible approach for developing lightweight, ultrathin, low-filler-loading, and absorption-dominated EMI shielding materials. Download: Download high-res image (272KB) Download: Download full-size image A lightweight and ultrathin porous carbon membrane was developed by introducing Fe(acac) 3 as a molecular-level precursor to construct an interconnected conductive network and magnetic components. The optimized membrane achieves absorption-dominated EMI shielding with a shielding effectiveness of 94.9 dB and an absorption contribution of 80.2 dB at a thickness of only 0.42 mm.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiaojun Zhou,Wenwen Yang,Chunmei Zeng,Hejun Gao,Yunwen Liao,Kunpeng Song
·N-doped Fe 3 O 4 @CNTs with Fe-Nx and oxygen vacancies was fabricated for efficient ORR electrocatalysis. • The catalyst shows onset potential of 0.87 V and superior stability toward oxygen reduction reaction. • Zinc–air battery delivers 173.90 mW·cm −2 power density and stable running for 280 h. • Synergy of oxygen vacancies and Fe-Nx sites boosts ORR activity and structural stability. A composite catalyst consisting of Fe 3 O 4 nanoparticles coated with nitrogen-doped carbon nanotubes (Fe 3 O 4 @CNTs) was synthesized via in situ pyrolysis using heme-modified CNTs. Benefiting from the CNT coating and oxygen vacancies, the catalyst exhibits a half-wave potential of 0.88 V for oxygen reduction in alkaline media, with stability surpassing commercial Pt/C. In zinc-air batteries, it achieves a power density of 173.90 mW·cm −2 and maintains stable operation over 280 h. Experimental and theoretical studies reveal that the CNT coating provides a 3D conductive network, prevents Fe 3 O 4 agglomeration, and modulates the electronic structure of the active-sites via Fe–N interactions. Meanwhile, abundant oxygen vacancies are introduced into Fe 3 O 4 , optimizing O 2 adsorption and reducing reaction barriers. This work offers new insights into the design of iron-based oxide electrocatalysts with high activity and durability for renewable energy applications.
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高影响因子
Science Bulletin
·
2026
·
IF 20.7
Qiaohui Chen,Xiaohong Ying,Ziyu Wu,Chenxi Miao,Wan Zeng,Yikai Cai,Yayun Nan,Qiong Huang,Kelong Ai
Intracellular metal ion homeostasis, particularly the precise regulation of mitochondrial iron and calcium, is essential for maintaining energy metabolism and cell survival. Once disrupted, iron-mediated oxidative reactions and calcium overload mutually amplify, rapidly leading to mitochondrial dysfunction and cellular injury. In acute kidney injury (AKI), this mitochondria-centered iron–calcium imbalance represents a critical pathological axis driving oxidative stress, programmed cell death, and inflammation. However, effective therapies that coordinately regulate both processes are not yet available. Herein, we developed a polyvinylpyrrolidone (PVP)-coated Mg–Fe cyanometallate framework nanozyme (MFC) to calibrate iron–calcium homeostasis in AKI. The PVP coating facilitates its interaction with the highly expressed Megalin receptor in renal proximal tubular epithelial cells, promoting receptor-dependent endocytosis and tubular-targeted delivery. Built on a Prussian blue–like coordination framework, MFC efficiently captures bioactive iron to suppress oxidative stress, while its ion-exchange process concurrently releases Mg 2+ , acting as a physiological calcium antagonist that regulates mitochondrial calcium homeostasis. By stabilizing mitochondrial structure and function, this strategy suppresses the cascade amplification of cell death and inflammatory signaling, significantly ameliorating renal injury in AKI. This study proposes a therapeutic approach for AKI by rewiring mitochondrial iron–calcium imbalance and offers a design paradigm for multifactorially coupled diseases. Download: Download high-res image (264KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiaxin Gao,Zhuo Zhu,Qi Li,Yan Nie,Xian Wang
A complete, dense coating is essential for reducing eddy current losses in soft magnetic composites (SMCs) and improving their overall performance. In this study, 3-aminopropyltriethoxysilane (APTES) was utilized to modify the surface of Fe-Si powders through organosilane functionalization, followed by the hydrolysis-condensation reaction of tetraethyl orthosilicate (TEOS) to form a SiO 2 insulating layer. TEM, powder resistivity and electrochemical testing indicate a complete and dense surface coating on the powder. Furthermore, the surface modification of the powder with APTES reduces the impact of excess non-magnetic phase coating on the magnetic hysteresis loss of soft magnetic powder cores, which facilitates the regulation of magnetic permeability to obtain powder core samples with low loss and high direct current (DC) bias performance according to corresponding specifications. Experimental results show that for APTES-modified powders, when the TEOS dosage is 5 wt%, the fabricated soft magnetic powder core with a permeability grade of 60 μ exhibits excellent comprehensive performance: a DC bias retention of 70.7% at 100 kHz/100 Oe, a core loss of 1141 mW/cm 3 at 100 kHz/100 mT, and a low permeability temperature coefficient of 30 ppm/°C within −20 °C to 140 °C, indicating temperature stability. This study provides guidance on the fabrication of high-power, high-current soft magnetic powder cores and on controlling magnetic permeability specifications while minimizing losses.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Wenhao Zhang,Chuanyi Zhou,Jiahao Cui,Canglou Liu,Yongfang Rao,Wei Yan
Current adsorbents for bisphenol A (BPA) require complex preparation and relatively low adsorption capacities. Here, a high-performance adsorbent (Fe-N-C) was synthesized from iron-modified zeolite imidazole frameworks-8 (ZIF-8) via pyrolysis. With an exceptionally high specific surface area of 1565.15 m 2 ·g −1 , Fe-N-C removed 90% of BPA within 10 min and achieved adsorption equilibrium within 3 h. Furthermore, Fe-N-C exhibited a maximum BPA theoretical adsorption capacity of 877.45 mg·g −1 (288 K). The adsorption kinetics and isotherms conform to pseudo-second-order kinetics and the Langmuir model. Fe-N-C also demonstrated excellent performance across a wide pH range (4–10) and in complex water matrix. The high adsorption capacity was primarily attributed to π-π interactions, along with hydrogen bonding, electrostatic interactions, and hydrophobic interactions. Notably, in addition to efficiently adsorbing BPA, Fe-N-C exhibited a high selectivity toward organic compounds with two benzene rings by π-π interactions, such as bisphenol B (BPB), 2,2-bis (4-aminophenyl) propane (BAPP) and diclofenac (DCF) due to the mediation of graphitized microdomains. This study provides a simple route to prepare high-capacity N-doped carbon adsorbents for the selective and rapid adsorption of specific structural pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Peng Huo,Min Shi,Xiao Wang,Shuangyuan Li,Jiasheng Li,Jianxiang Wu,Qiaoxia Li,Qunjie Xu
To overcome the inherent activity, stability, and conductivity limitations of layered double hydroxides (LDHs) for the oxygen evolution reaction (OER), we developed an electrochemical-assisted strategy for time and potential controlled defect engineering in NiFeCo-LDH. Selective and controllable Fe extraction was achieved via a coordination reaction between Fe 3 + and SCN - under an applied potential, generating targeted oxygen and metal vacancies. The resulting catalyst exhibits an elevated Ni oxidation state and superior OER performance. The optimal sample (60 s Fe extraction) delivers a low overpotential of 254 mV at 100 mA/cm 2 and a Tafel slope of 48 mV/dec, while retaining over 90% activity after 400 h. In-situ Raman spectroscopy reveals that Fe extraction promotes the structural evolution from Ni(II)-O/OH to Ni(III)-OOH and activates the lattice oxygen mechanism (LOM), enhancing reaction kinetics. The catalyst also demonstrates promising performance under simulated industrial conditions and in seawater electrolytes, highlighting its potential for practical large-scale water electrolysis.
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危险品化学品经营许可证（带存储）