CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Shiyu Wu,Guoyin Zhu,Peng Liu,Xincheng Cao,Junming Xu,Jianchun Jiang
CuFe/Fe 3 O 4 enables selective HDO of stearic acid to C 18 alcohols and alkanes under mild conditions. • Oxygen vacancies and Lewis acid sites promote C O activation and suppress C C cleavage. • CuFe/Fe 3 O 4 shows excellent reusability over 23 consecutive catalytic runs. The development of highly efficient and tunable non-noble metal catalysts for the hydrogenation conversion of stearic acid offers a vital pathway for the sustainable production of fatty alcohols and alkanes. This study designed and synthesized a series of MFe/Fe 3 O 4 (M = Cu, Co, Ni) bimetallic catalysts, systematically investigating their catalytic performance differences and structure–performance relationships in the hydrodeoxygenation (HDO) of stearic acid. The CuFe/Fe 3 O 4 catalyst exhibited excellent activity and high selectivity, achieving complete conversion of stearic acid with an C 18 alcohol yield of 96.5% under conditions of 220 °C, 4 MPa H 2 , and 3 h. By adjusting the reaction temperature, selective control over the product distribution between C 18 alcohol and C 18 alkane was realized, with an C 18 alkane yield of 97.1% achieved at 280 °C, highlighting excellent pathway selectivity and carbon atom utilization. Experimental and characterization results suggest that the introduction of a second metal facilitates hydrogen dissociation, while surface oxygen vacancies enhance the adsorption and activation of the C O group. Moreover, moderate Lewis acid sites contribute to the gentle polarization of the carbonyl group and simultaneously suppress C C bond cleavage, thereby synergistically improving selectivity toward the hydrodeoxygenation (HDO) pathway. The catalyst also exhibits excellent substrate compatibility and reusability, maintaining high catalytic activity after 23 cycles. The combined regulation of the HDO pathway by these three factors enables the efficient and selective synthesis of either C 18 alcohol or C 18 alkane, providing a theoretical foundation for the structural optimization of high-performance non-noble metal hydrogenation catalysts and the elucidation of their reaction mechanisms.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Wei Zhang,ChengLin Zheng,Song Feng,Xinfei Zhang,Jianing Lin
Interfacial water states are regulated by PDA@Fe 3 O 4 -crosslinked PVA. • Heat localization and mass transport are balanced via triple-layer hydrogels. • Optimized H-bond relaxation kinetics are revealed by spectroscopy and MD. • Hypersaline wastewater treatment is achieved by the robust system. Solar-driven interfacial evaporation (SIE) holds immense potential for decentralized clean water production, yet intrinsic transport bottlenecks and high kinetic barriers of vaporization often limit its practical outputs. Here, we present a functionally graded triple-layer evaporator designed through interfacial barrier engineering to decouple heat localization from mass transport. By constructing a hydration-regulated gradient—comprising a photothermal PDA@Fe 3 O 4 top-layer, a crosslinking-tuned intermediate hydrogel, and a macroporous scaffold—we demonstrate precise control over water states. Crucially, our results suggest that the evaporation enhancement is more closely associated with interfacial water-state regulation and hydrogen-bond relaxation behavior than with a simple ‘enthalpy reduction’ interpretation, as consistently supported by the combined spectroscopic observations and molecular dynamics analysis. This gradient architecture enables an evaporation rate of 3.10 kg m −2 h −1 with approximately 92% efficiency under one-sun. Our work provides a mechanistic framework for overcoming the transport-energetics trade-off in SIE, offering a robust solution for treating diverse hypersaline and complex wastewater.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Jinpeng Zhang,Yanxin Jia,Jieying Jing,Wen-Ying Li
Cu-based water–gas shift catalysts suffer severe sintering due to Cu oxidation state changes and particle aggregation. To address this challenge, Al-doped Fe 3 O 4 spinel supports were constructed. The optimized Cu/Fe 3 O 4 -A 3 catalyst with an Al/Fe molar ratio of 3:3 achieved near-theoretical CO conversion (98.24% vs. the thermodynamic equilibrium of 98.50%) and maintained >97% conversion over 100 h. HAADF-TEM and in-situ XRD analysis revealed that CuFeAlO 4 spinel cages suppress Cu migration (Δd 311 < 0.02 Å at 300 °C), while the formation of Cu–O–Al covalent bonding strengthens metal-support interaction and inhibits Ostwald ripening. Combined DFT and ab initio molecular dynamics simulations further demonstrate that Cu–O–Al covalent bonding enhances the anchoring of Cu species, and increases the migration energy barrier to 1.37 eV—approximately 1.5 times higher than that of conventional Cu/Fe 3 O 4 . This work establishes a paradigm for sintering-resistant catalyst design via spinel-interface engineering.
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BIORESOURCE TECHNOLOGY
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2026
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IF 8.2
Licong Xu,Cunxu Gong,Minghua Wu,Deyou Yu
Waste sericin was valorized into Fe 3 O 4 / N -doped porous biochar Fenton-like catalyst. • Molecular coordination enabled uniform dispersion of active Fe 3 O 4 nanoparticles. • 0.1Fe-NC degraded 99.3% AO-7 with kobs of 0.266 min −1 via PMS activation. • Multiple ROS including Fe(IV)=O and 1 O 2 dominated the reaction. • Packed-bed continuous-flow operation kept >98% AO-7 removal for 720 min. Developing sustainable catalysts from waste biomass for advanced oxidation processes is highly desirable for wastewater treatment. Herein, a waste-to-resource strategy was proposed to upcycle silk-industry waste sericin into Fe 3 O 4 -anchored N -doped porous biochar Fenton-like catalysts (Fe-NC) for peroxymonosulfate (PMS) activation. Distinct from conventional biomass-derived Fe/carbon catalysts that often require external nitrogen dopants or post-loading of metal species, sericin served simultaneously as a carbon source, intrinsic nitrogen precursor, and Fe 3+ -binding biopolymer, enabling the coordination-assisted formation of Fe 3 O 4 / N -doped carbon interfacial active sites after controlled pyrolysis. The optimized 0.1Fe-NC possessed a high specific surface area of 477.9 m 2 g −1 and uniformly dispersed Fe 3 O 4 nanoparticles, enabling rapid removal of Acid Orange 7 (AO-7) over a wide pH range of 4–11. Nearly complete degradation of AO-7 (99.3%) was achieved within 30 min, with a pseudo-first-order rate constant ( k obs ) of 0.266 min −1 . Mechanistic investigations revealed that multiple reactive oxygen species, including Fe(IV)=O, SO 4 -, OH, and 1 O 2 , jointly contributed to pollutant degradation. In addition, the catalyst exhibited excellent magnetic recoverability and stability, maintaining 89.7% removal efficiency after five cycles. Continuous-flow experiments further demonstrated stable performance (>98% removal for 720 min), highlighting its practical applicability. This work provides a sustainable strategy for converting protein-rich sericin waste into efficient Fe-based biochar catalysts and offers insights into designing biomass-derived PMS activation systems with integrated heteroatom doping, metal anchoring, and interfacial electron-transfer regulation. Download: Download high-res image (166KB) Download: Download full-size image
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PubMed
高影响因子
ChemSusChem
·
2026
·Vol. 19
·期 15
·e70941
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IF 5.9
Rahmat Ullah,Jinshan Cheng,Sheraz Muhammad,Sumayya Khan,Huaifeng Li,Ali Aman,Ke Zhang,Tayirjan Taylor Isimjan,Shohreh Azizi,Xiulin Yang
Developing robust, efficient oxygen evolution catalysts is essential to advancing alkaline water electrolysis and sustainable hydrogen production. Herein, we present a vacancy-engineered MoO 2 /Fe 3 O 4 -Mel nanorod composite, grown on nickel foam via a one-step solvothermal strategy. The catalyst possesses abundant oxygen vacancies and strongly coupled MoO 2 /Fe 3 O 4 heterointerface, while the nitrogen-rich melamine framework promotes electronic modulation of Fe active centers. During electrochemical activation, it undergoes surface reconstruction to generate an FeOOH active phase and oxygen vacancies promote interfacial charge redistribution. These structural and electronic features accelerate charge transfer and facilitate the adsorption and conversion of oxygenated intermediates during oxygen evolution reaction (OER). As a result, the optimized MoO 2 /Fe 3 O 4 -Mel catalyst delivers ultra-low overpotential of 217 mV at 100 mA cm −2 , a small Tafel slope of 70 mV dec −1 , and maintains stable operation for 150 h. In situ Raman and in situ Fourier transform infrared spectroscopy reveal vacancy-associated surface reconstruction and dynamic oxygenated intermediate evolution, while tetramethylammonium and pH-dependent studies confirm an adsorbate evolution mechanism. A two-electrode MoO 2 /Fe 3 O 4 -Mel (+) ||Pt/C (−) electrolyzer achieves a low cell voltage of 1.45 V at 100 mA cm −2 with negligible degradation over 100 h. This work highlights the effectiveness of interfacial electronic modulation and oxygen vacancy engineering for high-performance alkaline OER catalysts. Graphical A vacancy-engineered MoO 2 /Fe 3 O 4 -Mel nanorod catalyst was synthesized and delivered good oxygen evolution reaction (OER) activity (217 mV@100 mA cm −2 ), long-term stability, and robust overall water splitting (1.45 V@100 mA cm −2 ). Operando spectroscopic studies reveal oxygen vacancy-assisted dynamic FeOOH reconstruction and active site modulation, while complementary chemical probing suggests that OER proceeds via an adsorbate evolution mechanism.
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PubMed
高影响因子
Inorganics
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2026
·Vol. 14
·期 7
·188
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IF 3.4
Haocheng He,Boya Ma,Haozhe Sun,Zimeng Li,Huixu Liu,Wenshi Zhao,Naveen Reddy Kadasala,Bo Feng,Yang Liu
The persistent accumulation of tetracycline (TC) antibiotics in aquatic environments poses severe ecological and public health risks, necessitating the development of multifunctional platforms capable of simultaneous detection and degradation. Herein, we report magnetically recoverable plasmonic Fe3O4/Cu2O-Ag nanocomposites (NCs) that integrate visible-light-driven photocatalysis with ultrasensitive surface-enhanced Raman scattering (SERS) detection. Hierarchical flower-like Fe3O4nanocrystals were employed as magnetic supports, followed by in situ growth of Cu2O nanocrystals and controlled deposition of Ag nanocrystals. The optimized composite (FCA-2) exhibited enhanced visible-light absorption (Eg= 1.86 eV), suppressed electron–hole recombination, and improved photocurrent response, which were attributed to Schottky barrier formation at the Cu2O-Ag interface and localized surface plasmon resonance (LSPR) effects. Under simulated solar irradiation, FCA-2 NCs achieved 91.79% degradation of TC within 60 min, following pseudo-first-order kinetics (k = 20.37 × 10−3min−1). Finite-difference time-domain (FDTD) simulations revealed that optimal Ag loading maximized plasmonic “hot spot” density, thereby enhancing electromagnetic field intensity and SERS performance. The FCA-2 substrate enabled ultrasensitive TC detection with a limit of detection of as low as 10−10M. Moreover, the superparamagnetic Fe3O4core allowed for rapid magnetic separation and sustained performance over multiple SERS–photocatalysis cycles, with negligible signal attenuation after 30 days. This work presents a rational strategy for constructing plasmonic magnetic NCs that synergistically couple photocatalytic remediation, ultrasensitive sensing, and magnetic recyclability, offering significant potential for integrated environmental monitoring and sustainable water treatment applications.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Jinmei He,Yuhang Gao,Jiehui Li,Ying Zhang,Menglin Zhu,Jin Zhang,Mengge Cao,Xiao Wei,Mengnan Qu
The escalating global freshwater crisis demands urgent development of high-performance desalination technologies. Solar-driven interfacial evaporation (SIE) has emerged as an energy-efficient and environmentally sustainable technology for seawater purification, yet its practical adoption remains hindered by persistent challenges: performance degradation under prolonged operation, and inherent discontinuity of solar energy day and night. Herein, we propose a novel all-day solar-driven interfacial evaporators by solar-thermoelectric cogeneration system, which synergistically integrates a magnetically responsive Janus CS@Fe₃O₄/SA-MF evaporator with thermoelectric generator (TEG) and solar cells. The Janus evaporator fabricated by a facile two-step dip-coating methodology, features engineered asymmetric wettability (contact angle contrast: 152.5° vs. 0°) and exceptional broadband absorption (>99% across 250–2500 nm). Under solar irradiation (1 sun), the system achieved an exceptional evaporation rate of 2.678 kg·m⁻²·h⁻¹ over 10 hours with 96% efficiency, while simultaneously generating electricity according to the Seebeck effect (maximum output: 116 mV, 6.32 mA). Remarkably, due to the Peltier effect, the energy storage of the solar cell enabled sustained nocturnal operation, maintaining an evaporation rate of 1.088 kg·m⁻²·h⁻¹ (7 times of pure water). The synergistic design utilizes solar evaporation during the day and energy conversion at night to effectively overcome the barrier of dependence on sunlight. This work proposed cogeneration strategy opens new avenues for sustainable freshwater production and decentralized energy supply in water-energy nexus applications.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Zejun Cao,Ruixi Xiao,Yuxia Chen,Jiangtao Dong,Xuezhong Du
The widespread global use of paraquat (PQ) is attributed to its high herbicidal efficacy and low cost, however, the unresolved issue of its fatal toxicity to humans after ingestion remains a major challenge. The nanocarriers MIL-101(Cr)@MoS 2 @Fe 3 O 4 (MMF) are synthesized to load PQ through the strong π–p electron coupling between the delocalized π electrons of PQ and the localized p electrons of S atoms of MoS 2 at the interface, and then encapsulated with chitosan to construct magnetically recyclable PQ nanoherbicides with excellent stability and biosafety. The release of PQ from the nanoherbicides in simulated human gastrointestinal environments is inhibited (“PASS0” logic gate) from the source, thereby enhancing user safety. Under natural sunlight conditions, the near-infrared photothermal effect of MMF weakens the strong interfacial π–p electron coupling between PQ and MMF, resulting in the release of PQ (“YES” logic gate). The PQ nanoherbicides maintain the herbicidal efficacy of bare PQ in practical applications. The residual nanoherbicides can be easily recovered using magnets, with the collection ratios of 97.8 % and 91.1 % in water and soil, respectively, at a magnetic field strength of 0.5 T. Seed dressing, cytotoxicity, and mouse models demonstrate that the nanoherbicides have excellent biosafety for both plant growth and PQ-ingesting users. The creative PQ nanoherbicides simultaneously address the challenging issues of user safety, herbicidal efficacy, and environmental friendliness from the source.
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Desalination and Water Treatment
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2024
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IF 1
Xuezhen Feng,Yakun Zhang,Chunyan Liang,Jingang Yu,Xinyu Jiang
A novel adsorbent, poly-(dimethyl diallyl ammonium chloride) (PDDA) functionalized graphene oxide (GO) further decorated with ferro ferric oxide (Fe 3 O 4 ) nanoparticles, has been developed and used for instantaneous Cr(VI) removal from aqueous solution, and a reliable direct filtration-adsorption was achieved. Fourier transform infrared (FTIR) spectroscopy, Raman spectra (Raman), zeta potential measurement, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and differential pulse voltammetry (DPV) were adopted to confirm and investigate the chemical compositions, surface properties, morphological and electrochemical performance of the as-prepared magnetic nanocomposite (denoted as GO/PDDA/Fe 3 O 4 ). The maximum adsorption capacity of GO/PDDA/Fe 3 O 4 for Cr(VI) was 141.68 mg/g at pH = 2, and the desorption-regeneration results exhibited GO/PDDA/Fe 3 O 4 could be a potential prospective nanocomposite used for instaneous filtration-adsorption of Cr(VI) from aqueous solution in real-life situations due to its fast, effective and stable properties.
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LANGMUIR
·
2021
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IF 3.882
Shuwen Xue,Jinjin Fan,Keji Wan,Guoqiang Wang,Yawen Xiao,Wenting Bo,Mingqiang Gao,Zhenyong Miao
Ca-modified Fe3O4 nanoparticles encapsulated in humic acid (HA-Ca/Fe3O4) were produced using a co-precipitation method. Furthermore, the adsorption performance of HA-Ca/Fe3O4 as well as the effect of coexisting ions and mechanisms were evaluated. A good description of the adsorption process was given using pseudo-second-order kinetic and Langmuir models. The adsorption capacities of HA-Ca/Fe3O4 for Pb2+, Cu2+, and Cd2+ were 208.33, 98.33, and 99.01 mg g–1, respectively. The 0.02–0.1 times concentrations in alkali and alkaline-earth metals promoted Pb2+ and Cd2+ adsorption; however, any concentration of alkali and alkaline-earth metals inhibited Cu2+-ion adsorption, probably owing to the differences in ionic radii between the interfering and heavy-metal ions. Pb2+, Cu2+, and Cd2+ removal using HA-Ca/Fe3O4 occurred via ion exchange, complexation of O-containing functional groups, mineral precipitation, and π-electron coordination. A method was proposed to calculate the contribution of these mechanisms to the adsorption process. In practice, HA-Ca/Fe3O4 can remove 99% Pb2+ and 91% Cu2+ and Cd2+ from real wastewater samples. Following five adsorption–desorption cycles, HA-Ca/Fe3O4 adsorption capacity did not change significantly. The aforementioned results indicated that HA-Ca/Fe3O4 presented a good potential in removing heavy metals in wastewater.
研究领域:
环境科学
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材料科学
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水处理技术
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纳米技术
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吸附机理
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yixin Chen,Yisimayili Tuersun,Pingjun Luo,Tong Wu,Zexi Chen,Yubin Ke,Sheng Chu
Water-based lubrication systems are increasingly attractive due to their environmental friendliness, cost-effectiveness, and safety merits. While oleic acid-modified magnetite nanoparticles (Fe 3 O 4 -OA) have demonstrated promising properties as lubricant additives in oil-based systems, their performance in water-based lubrication systems remains largely unexplored, as the Fe 3 O 4 -OA nanoparticles exhibit limited dispersion stability and tribological performance in aqueous environments. In this study, Fe 3 O 4 -OA was combined with amine-functionalized silica (SiO 2 -NH 2 ) nanoparticles to enhance the anti-friction and anti-wear properties in water-based lubrication. Comparative tribological tests showed that adding 1 wt% Fe 3 O 4 -OA and 1 wt% SiO 2 -NH 2 reduced the coefficient of friction by 72.4% and the wear volume by 81.7% under a 100 N load compared with pure water. Small-angle neutron scattering (SANS) analysis reveals that increasing Fe 3 O 4 -OA concentration led to a more extended configuration of oleic acid molecular chains, facilitating interactions with surface amine groups on SiO 2 -NH 2 . These interactions promote the formation of a stable and compact tribofilm through combined Lewis acid–base coordination, hydrogen bonding, and electrostatic attraction. The improved frictional performance provides insights into the rational design of high-performance, water-based lubrication systems via nanoparticle additives.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Pingping Hao,Yajie Hu,Yujie Cao,Boru Du,Mingguang Han,Wei Zhao,Sida Luo
The increasing prevalence of electromagnetic interference (EMI) demands shielding materials that offer strong attenuation with minimal reflection. While conventional metal-based shields suffer from high density, corrosion, and reflection-dominated mechanisms, we present a facile, scalable, and customizable route to fabricate laser-induced graphene/Fe 3 O 4 gradient composites (LIG/Fe 3 O 4 ) integrated with frequency-selective surface (FSS) patterning. Through decoupled control of electrical conductivity (via laser parameters) and magnetic permeability (via Fe 3 O 4 loading), a multilayered gradient architecture is constructed, enabling progressive impedance matching and synergistic conductive-magnetic loss. The optimized composite exhibits exceptional total EMI shielding effectiveness (SE T > 54 dB) in the Ku-band while maintaining low reflection loss (SE R < 10 dB), yielding a remarkable specific shielding effectiveness (SSE/t) > 1391 dB·cm 2 /g. FSS further enhances localized field interactions, boosting absorption and overall performance. The synergy between the dual-gradient structure and surface patterning is elucidated, illustrating how independent property tuning collectively elevates shielding performance. With excellent flexibility, environmental stability, and flame retardancy, this work provides a versatile design platform for next-generation flexible electronics and advanced communication systems.
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