CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xianlin Zhan,Mengqiu Huang,Bicheng Li,Ge Ma,Wenbin You,Yun Tang,Lei Wang,Renchao Che
Rational design of magnetic-dielectric composites proves essential for developing broadband electromagnetic (EM) wave absorbers. However, the non-uniform distribution of magnetic particles within the carbon matrix significantly reduces magnetic coupling efficiency. To overcome this, we employ a confinement strategy to fabricate Fe/Fe 3 O 4 @C composite aerogels that feature a multiscale magnetoelectric coupling network. The confined-growth Fe/Fe 3 O 4 @C nanoscale magnetic‑carbon units construct high-density heterogeneous interfaces, enhancing charge accumulation and interfacial polarization, thereby further strengthening energy dissipation. Meanwhile, under the confinement of the aerogel framework, metal-organic frameworks (MOFs) derived materials in the 2D magnetized micro-flakes maintain their octahedral morphology and collectively establish a continuous, stable nano-micro-macro magnetic coupling network. Moreover, the theoretical investigations including density functional theory calculations, COMSOL Multiphysics simulation, and radar cross-section simulation systematically elucidate the structure-property relationships governing dielectric behavior, magnetic properties, and absorption bandwidth. Notably, the optimized Fe/Fe 3 O 4 @C exhibits remarkable EM absorption performance, achieving a reflection loss of −48.44 dB and a broad bandwidth of 6.88 GHz at 2.15 mm thickness, fully covering the Ku band. Moreover, constructing the periodic structure enables an ultrabroadband absorption of 11.36 GHz at a thickness of only 4.15 mm. This study provides an idea for fabricating multifunctional EM wave absorbers with lightweight, broadband absorption, hydrophobic, thermal insulation, and infrared stealth properties.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Tao Wang,Qiudi Zhang,Xupeng Zhu,Yasi Wang,Mengjie Zheng,Jing Wang,Wenbo Liu,Yahui Wang,Xiaojun Pan,Huimin Shi
Transition-metal-based catalysts with asymmetric coordination structures are promising candidates for industrial oxygen evolution reactions. However, the large-scale synthesis of catalysts with precisely constructed asymmetric coordination structures is still challenging. Herein, we developed an industry-compatible roll-to-roll combustion technology to synthesize NiFc–MOFs with reasonably constructed asymmetric Fe–O–Ni coordination. Owing to the modulated electronic spin states, regulated adsorption configurations of oxygen-containing intermediates, and charge redistribution, the as-prepared NiFc–MOF achieved ultralow overpotentials of 196 mV and 257 mV at η10 and η1000, respectively. The long-term stability evaluation of catalysts in a three-electrode system demonstrates excellent durability of 2000 h at 2 A cm–2. Further, the assembled anion exchange membrane water electrolyzer (AEMWE, NiFc–MOF||R–Ni) operated at a current density of 1 A cm–2 achieved high overall water splitting with a low cell voltage of merely 2 V and maintained outstanding durability for over 500 h under ambient atmosphere. More importantly, the NiFc–MOF maintained high stability for over 250 h at 1 A cm–2 in simulated seawater. This study offers a reliable pathway to the large-scale synthesis of low-cost NiFe-based catalysts for ampere-level oxygen evolution in both pure and seawater.
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RSC Advances
·
2026
·Vol. 16
·期 33
·30145-30157
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IF 6.1
Mingchen Zhang,Wei Zhao,Yang Zhou,Ruiting Shen,Yiqiong Sun,Lei Jiang,Jiantao Zhang
Diabetic wounds are a serious and increasingly prevalent complication in patients with diabetes, characterized by impaired skin regeneration. A major challenge for effective healing is recurrent bacterial infection, which often resists conventional treatment strategies. In this study, we grafted polymyxin B onto hyaluronic acid and employed Fe3+–EDTA as a cross-linking agent to fabricate HA-B@Fe hydrogels via ionic interactions. Based on the reversible and dynamic coordination between Fe3+ ions and the carboxyl groups of the hyaluronic acid, the resulting hydrogels exhibited shear-thinning behavior and excellent injectability. Based on the combined effects of polymyxin B and Fe3+, the HA-B@Fe hydrogel exhibited potent antimicrobial activity against a broad spectrum of bacteria, achieving >99% bactericidal rates against Escherichia coli (E. coli) and >94% against Staphylococcus aureus (S. aureus). In addition, the HA-B@Fe hydrogel demonstrated great biocompatibility, and showed significant therapeutic efficacy in a diabetic mouse wound model. The mice treated with HA-B@Fe showed a marked reduction in wound size (down to 19%), compared to a residual wound size of 32% in group treated with commercial dressings at day 7. Histopathological analysis further confirmed that HA-B@Fe treatment promoted epidermal regeneration and collagen fiber deposition, suggesting its potential as a promiseing strategy for the clinical treatment of diabetic wounds.
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Applied Materials Today
·
2026
·
IF 7
Madiha Rafiq,Dan Liao,Changkun Liu
Ternary g-C 3 N 4 /Ti 3 C 2 T x /MIL-101(Fe) photocatalyst was constructed via in situ assembly. • Ti 3 C 2 T x promotes interfacial charge separation and accelerates electron transfer. • Rapid in situ H 2 O 2 generation enables an oxidant-free visible-light photo-Fenton process. • CTF achieves efficient, broad-spectrum degradation of dyes and PPCPs. Visible-light photo-Fenton oxidation represents a promising strategy for removing dyes and pharmaceuticals/personal care products (PPCPs), which are persistent water contaminants. However, its broader application is constrained by challenges such as inefficient charge separation and dependence on externally added hydrogen peroxide (H 2 O 2 ). In this study, a ternary g-C 3 N 4 /Ti 3 C 2 T x /MIL-101(Fe) photocatalyst was synthesized via the in-situ growth of MIL-101(Fe) on g-C 3 N 4 /Ti 3 C 2 T x , enabling efficient visible-light-driven, zero-external H 2 O 2 -added photo-Fenton degradation of organic pollutants. The hybrid system exhibits significantly enhanced oxygen activation and interfacial electron-transfer capability, with in situ H 2 O 2 generation rates about three times higher than those of pristine g-C 3 N 4 . Under visible-light irradiation, the composite continuously produces reactive oxygen species ( ∙ O 2 - , and ∙ OH) at substantially higher levels than g-C 3 N 4 and g-C 3 N 4 /MIL-101(Fe), indicating promoted charge separation and faster interfacial electron transfer. As a result, the catalyst enables broad-spectrum pollutant removal within 60 min, achieving degradation efficiencies of 99.78% (methylene blue), 99.49% (rhodamine B), 88.27% (tribromophenol), 61.50% (doxycycline hydrochloride), and 78.98% (levofloxacin). Overall, rapid in situ H 2 O 2 formation, coupled with efficient ROS generation, enables high-performance pollutant degradation without the need for external oxidant dosing, providing a green strategy for degrading dyes and PPCPs under visible light. Download: Download high-res image (174KB) Download: Download full-size image A ternary g-C 3 N 4 /Ti 3 C 2 T x /MIL-101(Fe) photocatalyst enables visible-light-driven, oxidant-free photo-Fenton degradation of dyes and PPCPs through MXene-promoted charge separation and rapid in situ H 2 O 2 generation. The self-generated H 2 O 2 activates Fe 3+ /Fe 2+ cycling to continuously produce h + , ∙O 2 - , and ∙OH, achieving efficient pollutant mineralization.
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Catalysts
·
2026
·Vol. 16
·期 3
·
IF 4.5
Yao He,Jie Zhang,Renhua Huang,Nanxin Li,Yunwu Zheng
CO2-assisted catalytic pyrolysis presents a viable and promising approach to addressing plastic waste pollution and mitigating climate change. However, the effects of the metal–catalyst combination mode and the spatial distance between metal–acid sites on catalytic performance remain unclear. In this study, the reaction behaviors of the configurations, Fe3O4and ZSM-5 in tandem catalysis (Fe3O4&HZ), their physical mixture (Fe3O4-HZ), and Fe-loaded ZSM-5 (Fe/HZ), were compared in polypropylene pyrolysis under a CO2atmosphere. The aromatic contents followed this order: Fe/HZ > Fe3O4-HZ > Fe3O4&HZ > ZSM-5 > Fe3O4. Specifically, Fe/HZ with the highest degree of metal–zeolite proximity achieved an aromatic content of 66.1%, significantly higher than the 34.2% obtained with Fe3O4&HZ, demonstrating that closer metal–acid proximity promoted aromatic formation. Moreover, Fe/HZ significantly reduced coke deposition. Based on characterization results from XRD, SEM, TEM, XPS, and NH3-TPD, the enhanced spatial proximity between metal and acid sites strengthened the functional synergy between iron-based redox sites and zeolitic Brønsted acid sites. This synergy facilitated the reverse water–gas shift reaction of CO2, which consumed hydrogen generated during aromatization and shifted the reaction equilibrium toward enhanced aromatic production. These findings would offer theoretical and strategic insights into the optimization of CO2-assisted catalytic pyrolysis systems for the sustainable upcycling of plastic waste.
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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.
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DESALINATION
·
2026
·
IF 9.9
Anrong Yao,Xingwei Fu,Qian Xu,Chang Liu,Yunbo Mo,Qinglan Xue,Jiaojiao Shang,Jianwu Lan,Shaojian Lin
Eliminating various organic pollutants from wastewater continues to pose a major environmental issue. Herein, CO 2 -responsive magnetic bio-aerogels (Ag/Fe-NC@DCG) integrating “smart” adsorption and photo-Fenton-like degradation were constructed by embedding surface plasmon resonance (SPR)-enhanced MOF-derived Ag/Fe nanocarbon (Ag/Fe-NC) into cellulose nanocrystal reinforced gelatin aerogels, followed by surface functionalization with a CO₂-responsive silane coupling agent ( N, N -diethyl-3-aminopropyltrimethoxysilane). The resulting aerogels exhibited outstanding adsorption capacities toward charged pollutants, reaching 859.62 mg/g for negatively charged methyl orange (MO) and 635.92 mg/g for positively charged methylene blue (MEB), governed by electrostatic interactions and hydrogen bonding. The adsorption process was well described by the Langmuir adsorption isotherm model and pseudo-second-order adsorption kinetic model. Remarkably, CO 2 served as a trigger gas to enable rapid and selective adsorption of negatively charged organic pollutants from the mixture, thereby realizing CO 2 -regulated selective adsorption. As anticipated, under visible light irradiation in the presence of peroxymonosulfate (PMS), the Ag/Fe-NC component efficiently catalyzed photo-Fenton-like reactions, leading to significantly enhancing removal efficiencies for both charged and neutral organic pollutants. For neutral bisphenol A (BPA) and amphoteric tetracycline hydrochloride (TCH) that were initially unadsorbed, their removal efficiencies rose dramatically from 5.24% and 12.79% to 90.67% and 97.40%, respectively. Additionally, the aerogels demonstrated excellent recyclability, mechanical robustness, and antibacterial activity. Overall, this work presents a versatile and sustainable aerogel platform that integrates CO 2 -triggered selective adsorption with photo-Fenton-like degradation, offering a prospective pathway for wastewater remediation.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Xingzhi Jin,Jing Guo,Minghui Gao,Ting Chen,Chuang Wang,Shengyao Wang,Peng Cai,Hao Li,Haotian Liu,Hao Chen,Xing Ding
Traditional Fenton reaction is limited by strict pH and iron sludge. integrating photo-Fenton enables operation under mild conditions. We report a one-step hydrothermal synthesis of Fe-modified Bi 2 WO 6 (Fe-BWO) to create an efficient photo-Fenton synergistic system for ciprofloxacin (CIP) removal under visible light. The Fe-BWO system achieved 83.7 % CIP degradation in 1 h, surpassing standalone photocatalysis and homogeneous Fenton. The degradation rate was 6 times that of photocatalysis and 1.5 times that of homogeneous Fenton. Crucially, the system exhibited excellent stability, wide pH applicability, and low H 2 O 2 consumption OH, and ·O 2 − were confirmed as major reactive species. Mechanistic studies indicate that the narrowed band gap promotes electron migration, while H 2 O 2 -induced surface microenvironment variation (attributed to Bi (3−x)+ electron redistribution) is vital for molecular oxygen activation. This work offers novel insights into H2O2 activation and the impact of surface microenvironments in photo-Fenton processes.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jing Li,Ruoqi Wang,Zhen Su,Dandan Zhang,Heping Li,Youwei Yan
Nowadays, it is extremely urgent to search for efficient and effective catalysts for water purification due to the severe worldwide water-contamination crises. Here, 3D Fe@VO 2 core-shell mesh, a highly efficient catalyst toward removal of organic dyes with excellent recycling ability in the dark is designed and developed for the first time. This novel core-shell structure is actually 304 stainless steel mesh coated by VO 2 , fabricated by an electrophoretic deposition method. In such a core-shell structure, Fe as the core allows much easier separation from the water, endowing the catalyst with a flexible property for easy recycling, while VO 2 as the shell is highly efficient in degradation of organic dyes with the addition of H 2 O 2 . More intriguingly, the 3D Fe@VO 2 core-shell mesh exhibits favorable performance across a wide pH range. The 3D Fe@VO 2 core-shell mesh can decompose organic dyes both in a light-free condition and under visible irradiation. The possible catalytic oxidation mechanism of Fe@VO 2 /H 2 O 2 system is also proposed in this work. Considering its facile fabrication, remarkable catalytic efficiency across a wide pH range, and easy recycling characteristic, the 3D Fe@VO 2 core-shell mesh is a newly developed high-performance catalyst for addressing the universal water crises.
研究领域:
环境催化
·
材料科学
·
水处理
·
纳米材料
·
化学工程
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Xue Bai,Juan Shi,Lu Xu,Xin Jin,Xuan Shi,Pengkang Jin
To overcome the shortcomings of homogeneous Fe ion activating peroxymonosulfate (PMS), such as high pH-dependence, limited cycling of Fe(III)/Fe(II) and sludge production, graphite carbon nitride (g-C 3 N 4 ) is chosen as a support for Fe ions, and reduced graphene oxide (rGO) is employed to facilitate the electron transfer process, thereby enhancing catalysis. Herein, a ternary catalyst, Fe-g-C 3 N 4 /rGO, is first applied under lightless condition for PMS activation , which exhibits ideal performance for contaminant mineralization. 82.5 % of the total organic carbon (TOC) in 100 mL of 5 mg/L bis -phenol A (BPA) was removed within 20 min by the optimal catalyst named 30%rFe 0.2 CN, which shows a strong pH adaptability over the range of 3–11 compared with a common Fenton-like system. Moreover, the highly stable Fe-g-C 3 N 4 /rGO/PMS catalytic system resists complex water matrices, especially those with high turbidity . To unveil the mechanism of PMS activation and pollutant degradation , the physicochemical properties of the as-prepared catalysts are comprehensively characterized by multiple techniques. The Fe(III) contained in both the Fe-N group and α-Fe 2 O 3 component of 30%rFe 0.2 CN not only directly reacts with PMS to produce sulfate radicals ( SO 4 − ) and hydroxyl radicals ( OH), but also combines with PMS to form the essential [Fe(III)OOSO 3 ] + active complex, thereby generating superoxide radicals ( O 2 − ) and singlet oxygen ( 1 O 2 ). Among the various reactive oxidizing species, 1 O 2 plays an important role in pollutant removal , which is additionally generated by the C O moiety of the catalyst activating PMS as well as PMS self-oxidation, indicating the dominance of the non-radical pathway in the pollutant degradation process. Due to the advantages of high efficiency, wide pH adaptability and stability, the proposed lightless Fe-g-C 3 N 4 /rGO/PMS catalytic system represents a promising avenue for practical wastewater purification.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Dongqin He,Dongli Wang,Hongwei Luo,Yifeng Zeng,Ganning Zeng,Jun Li,Xiangliang Pan
The most important factor that restricts the decomposition of H 2 O 2 in the Fe 3+ /H 2 O 2 reaction is the slow cycling efficiency of reducing Fe 3+ to Fe 2+ . In this study, the addition of tungsten disulfide (WS 2 ) as a co-catalyst achieved a rapid cycling of the reaction rate-limiting step and a significant enhancement of H 2 O 2 decomposition, which resulted in the effective degradation of acetaminophen (APAP). Results show that 99.6% of APAP (5 mg L −1 ) could be degraded by H 2 O 2 /Fe 3+ /WS 2 system within 2.5 min. The conversion of Fe 3+ to Fe 2+ occurred mainly on the surface of WS 2 due to the redox reaction of the exposed W 4+ active sites with Fe 3+ after the unsaturated S atoms were bound to protons. Electron paramagnetic resonance (EPR) and radical quenching experiments evaluated the contribution of hydroxyl radical (•OH) and superoxide radical (O 2 • − ) in the degradation of pollutants. WS 2 showed good recoverability after four cycles of the reaction. This study provides a new perspective to improve the efficiency of Fe 3+ /H 2 O 2 and provides a reference for the involvement of transition metal sulfides in advanced oxidation processes (AOPs).
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CHEMOSPHERE
·
2023
·
IF 8.8
Sini Lv,Fengzhen Zheng,Zeyu Wang,Luyao Dai,Huan Liu,Dzmitry Hrynshpan,Tatsiana Savitskaya,Jun Chen
The high hydrophobicity of n -hexane is the main reason why it is difficult to be removed biologically. In this study, the effects of bamboo-charcoal modified by bimetallic Fe/Pd (BBC) on n -hexane biodegradation by Pseudomonas mendocina NX-1 (PM) was investigated. The n- hexane removal efficiency was increased in the presence of BC. The highest n- hexane removal efficiency at 90.0% was achieved at 0.05 g L −1 BCE and 3 g L −1 NH 4 + under pH 7.7 and 35 °C. Additionally, protein content (45.9 μg mL −1 ) and negative cell surface zeta potential (−26.4 mV) were increased during biodegradation process, with PM-BBC being 43.1 μg mL −1 and 19.1 mV. Bacterial growth was improved and maximum cell surface hydrophobicity was obtained after 20 h, which was 59.4% higher than the control with PM-BBC (37.7%) or PM (16.1%), showing biodegradation products of 1-butanol and acetic acid. The results indicate that BBC improved n- hexane biodegradation efficiency by promoting bacterial growth, reducing cell zeta potential, exposing hydrophobic proteins, and increasing cell surface hydrophobicity of bacterial strain NX-1. This investigation suggests that BBC-enhanced biodegradation can be promising to treat n- hexane-containing gas.
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