JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Zhen Ge,Xin Li,Wenguo Zhang,Qili Sun,Chunpeng Chai,Yunjun Luo
In this paper, the ultrafine Fe-O compound/ammonium perchlorate (AP) nanocomposites were prepared via in-suit growth method. The structure and morphology of the nanocomposites were characterized by infrared spectra, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersion X-ray spectrometer (EDS) and transmission electron microscopy (TEM) test. The results showed that the prepared Fe-O compound nanoparticles were amorphous state and deduced as 2L-ferrihydrite. The size of Fe-O compound/AP nanocomposites could be effectively controlled by changing the recrystallization condition. 2L-ferrihydrite nanoparticles was evenly dispersed in the nanocomposites proved by EDS and TEM analysis. Furthermore, the thermal decomposition of Fe-O compound/AP nanocomposites was analysized by TG-DSC method. The prepared 2L-ferrihydrite nanoparticles of the nanocomposites showed good catalytic effect on AP because of their decreasing the decomposition temperature and increasing the total heat release of AP.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haidong Yu,Zhiqiang Hou,Longchao Zhuo,Xijun Liu,Yabin Zhang
Microplastic accumulation in water bodies is posing a serious threat to public health. Their chemical inertness impairs the effectiveness of current micro/nano-material-based remediation strategies. Especially in urban drinking water systems, microplastics constantly released and accumulated together with the complexity of pipeline networks challenges the recyclability and long-term stability of remediation materials and technology. To address this, Cu-single-atom magnetic Janus microparticles (CuMJMs) with flower-like crown morphology are engineered meticulously via a step-by-step strategy involving solvothermal growth and chemical deposition. The resulting CuMJMs feature a distinct Janus architecture composed of BiOI nanosheets and Fe 3 O 4 nanoparticles, thereby delivering synergistic magnetic and photocatalytic functionalities. When subjected to a rotating magnetic field, CuMJMs are able to locomote collectively and recover rapidly in confined microenvironments. The incorporation of atomically dispersed Cu single atom not only enhances the number of active sites, but also promotes the separation and migration of photogenerated charge carriers. Such abilities enable CuMJMs to degrade polyethylene (PE) efficiently, achieving a weight loss rate of 53.7 % beyond previous reports. This performance improvement is ascribed to singlet oxygen generation boosted by the Cu single atoms to facilitate oxidative degradation pathways, as supported by electron paramagnetic resonance and active species trapping test. While used in real water matrices, CuMJMs maintain both catalytic activity and magnetic responsiveness, underscoring their robustness and practical potential. This work establishes a new paradigm to active microplastic remediation, merging atomic-level catalytic precision with collective particle behavior to enable scalable and efficient environmental cleanup.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-22
·
IF 2.8
Guo Yiting,Hao Jingyi,Wang Tian,Su Shen,Yang Shuangshuang,Wang Xingwei,Yu Qiangliang
To investigate the electromagnetic wave absorption performance of electromagnetic-regulated materials and copolymerized composite aerogels with polymer materials, this study loaded nano-Fe 3 O 4 onto modified CNTs through a hydrothermal reaction. The resulting material was then added to a prepolymer solution of acrylic acid and acrylamide monomers for copolymerization, followed by the preparation of composite aerogels using freeze-drying technology (Fe 3 O 4 -CNTs/P(AA-AM)). The influence of the addition amount of nano-Fe 3 O 4 -loaded modified CNTs on the electromagnetic wave absorption performance of the composite aerogels was systematically studied. Notably, the Fe 3 O 4 -CNTs/P(AA-AM)-5 aerogel exhibited the optimal wave-absorbing performance, achieving a minimum reflection loss of −35.5 dB and an effective absorption bandwidth of 5.04 GHz below −10 dB. This is primarily attributed to the excellent dual electromagnetic loss of Fe 3 O 4 -CNTs and the multiple reflection, polarization, and relaxation processes induced by the three-dimensional conductive network constructed within the aerogel skeleton. The performance relationships revealed in this study are of significant importance for the design and preparation of polymer aerogels with effective electromagnetic wave absorption capabilities.
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Advanced Composites and Hybrid Materials
·
2026
·
IF 15.5
Yang Cao,Luo Jialiang,Wang Yue,Xue Yiqing,Liu Guigao,Lu Zhehong,Wang Suwei,Jiang Wei
Rational microstructure design and compositional regulation have emerged as effective pathways to enhance electromagnetic wave (EMW) absorption, However, simultaneously achieving strong absorption, broad bandwidth, thin thickness and low filler loading remains challenging. Herein, three-dimensional hierarchical heterostructures comprising amorphous carbon-wrapped magnetite supported on flower-like reduced graphene oxide (Fe₃O₄@C/FRGO) was constructed through spray-drying assembly, spatially confined solvothermal crystallization, and defect-modulated carbonization. By tailoring the reduction degree of FRGO and tuning ferrite composition through thermal treatment, the dielectric-magnetic properties and interfacial interactions are precisely regulated. With merely ≈ 3.26 wt% incorporation of FRGO, the optimized composite exhibits a minimum reflection loss (RL min ) of -66.29 dB at 1.94 mm (20 wt% filler) and a broad effective absorption bandwidth (EAB) of 6.60 GHz (11.30–17.90 GHz) at 2.73 mm (30 wt% filler). This exceptional performance is attributed to the engineered heterointerfaces that facilitate multi-path energy dissipation via magneto–dielectric coupling optimized impedance matching, intensive interfacial polarization from abundant hierarchical architectures and the flower-like structure induced multiple scatterings. This study highlights the pivotal role of interfacial engineering in heterostructured absorbers and offers a design paradigm for high-performance EMW-absorbing materials through coordinated component–structure modulation. Graphical abstract The alternative text for this image may have been generated using AI.
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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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JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Zhaorui Li,Simeng Gan,Xiaofeng Huang,Fei Wang,Xin Sun,Kai Li,Ping Ning
Preparation of Highly Crystalline Fe₂O₃-Based Catalyst (WCS600) from Copper Slag. • Thermal Reconstruction Tunes Fe–O Coordination and Oxygen Vacancies in WCS600. • Oxygen vacancies promote nitrate adsorption and activation and construct the Fe–OH working interface. • ICCUS-derived H₂ supply can reduce the NH₃ production cost to below 1.15 $ kg -1 . The synergistic treatment of copper slag valorization and nitrate wastewater remediation represents a critical pathway toward the high–value utilization of metallurgical solid waste and nitrogen resource recovery. This study employs a strategy synergistically coupling thermal reconstruction with surface defect engineering to convert the Fe–containing phases in copper smelting slag into an Fe₂O₃–based electrocatalyst, designated as WCS600. At −0.6 V vs. RHE, WCS600 achieves an NH₃ production rate of 7.16 mg h⁻¹ cm⁻² and a FE NH3 of 91.56%. Characterization and DFT calculations reveal that cathodic polarization induces the electrochemical reconstruction of surface oxygen vacancies, dynamically generating an interface enriched with mixed–valence Fe²⁺/Fe³ ⁺ species and hydroxylated Fe–OH. This interface promotes the directional conversion of nitrogen–containing intermediates, thereby enhancing NH₃ selectivity. In a simulated acidic smelting wastewater system, WCS600 exhibits excellent stability and resistance to interference, with Fe leaching remaining below the safety threshold. Further techno–economic analysis indicates that, under specific scenarios coupling low–carbon hydrogen sources, the NH₃ production cost of WCS600 could be reduced to below 1.15 $ kg⁻¹ . This study provides a theoretical foundation and practical guidance for the synergistic resource–oriented treatment of solid waste and nitrate wastewater, as well as for the development of scalable electrochemical ammonia synthesis. Download: Download high-res image (227KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Sheng Zhong,Bin He,Shuang Wei,Ruirui Wang,Ruirui Zhang,Ruixia Liu
Electrocatalytic glycerol oxidation reaction to produce high-value organic chemicals has research significance for managing the overproduction of glycerol and handling the energy crisis. Herein, a copper-based self-supporting catalytic electrode with a dynamic Fe-O-Cu optimized coordination (Fe-CuO x /CF) was prepared. The oxygen-bridged asymmetric coordination structure (Fe-O-Cu) optimized the electronic configuration and promoted the formation of the crucial intermediate species. After Fe was embedded in the lattice of copper oxides, a remarkable enhancement in the adsorption capacity of OH - and glycerol was confirmed. As a result, Fe-CuO x /CF exhibited an excellent production capacity of formate, with high faradaic efficiency and selectivity values of 93.65 % and 95.10 %. Concurrent production of formate and high purity hydrogen was achieved in the double-electrode flow electrolyzer. This work provides guiding significance for the optimization of the catalytic coordination and the design of high-efficiency transition metal-based catalysts for electrooxidation of biomass platform molecules.
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IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 23
·38685-38692
·
IF 4.3
Shan Tang,Jingcai Xu,Xinqin Lu,Weijie Chen,Hongwei Chen,Bo Hong,Xinqing Wang
Metal-organic frameworks (MOFs) have potential applications in gas sensing due to their abundant porosity and unique surface properties. In this study, Fe2O3 hexagonal spindles (Hgs) derived from MIL-88B(Fe) were successfully prepared using an oil bath method, followed by calcination treatment at an optimized temperature of
$450~^{\circ }$
C. The high-purity porous Fe2O3 Hgs showed excellent acetone gas-sensing performance in the range of 0.4–50-ppm acetone concentration. The Fe2O3 Hgs-450 obtained the high sensing response (Ra/Rg =23,
$\tau _{\text {res}} =17$
s, and
$\tau _{\text {rec}} =2059$
s), excellent selectivity, and stability over 120 days to 10-ppm acetone at an operating temperature of
$220~^{\circ }$
C. The sensing response value was still 1.88 even at 0.4-ppm acetone and the theoretical detection limit (DL) was calculated to reach 3.59-ppb acetone. These excellent acetone gas-sensing properties were attributed to the uniform porous structure, abundant adsorbed oxygen, and small grain size of Fe2O3 Hgs, making them an excellent candidate for screening diabetic patients through exhaled gas analysis.
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Materials Today Chemistry
·
2022
·
IF 7.613
Z. Cheng,H. Yang,Y. Xu,J. Jiang,Q. Xu
Fabrication of active and durable non-noble metal heterogeneous electrocatalysts to settle the relatively slow kinetic process and poor stability during the oxygen evolution reaction (OER) process is of great significance. Herein, we fabricate in-situ 2D Fe-based trimetallic complex spinel oxide nanosheets (FeCoNi)O 4 via a polyethylene glycol-barbituric acid deep eutectic solvent-assisted route. Multiple analytical characterizations illustrate a deep understanding of the structure and composition of (FeCoNi)O 4 , disclosing Fe, Co, and Ni ions occupy both tetrahedrally and octahedrally coordinated positions. Meanwhile, the synergistic actions of preparing multiple-cations substitution and constructing oxygen vacancy activate covalent Fe–O–Co bonds in (FeCoNi)O 4 . Due to the active bimetallic Fe–O–Co sites, enhanced electronic conductivity and unique structure stability, the synthesized 2D (FeCoNi)O 4 nanosheets exhibit excellent OER performance with relatively low overpotential (421 mV for 1000 mA/cm 2 ) and long-term stability (720 mA/cm 2 for 6 h) in alkaline media, which is much better than that of Fe-based bi/monometallic spinel oxides. In-situ Raman spectra and quasi-in-situ X-ray photoelectron spectroscopy results depict that O-bridged Fe–O–Co bimetallic sites promote the formation of μ(O–O) intermediates and undergo the direct O 2 evolution route, thus accelerating OER.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 33
·2316654
·
IF 18.5
Feng Xu,Ming Chen,Yaoxuan Cui,Libin Qian,Jin Wang,Zhao Han,Yanli Lu,Di Wang
The electronic nose aims to emulate the olfactory capabilities of osmatic animals, utilizing olfactory sensing array with different sensing characteristics to perceive odors. However, the separate precursors and preparation methods of sensing materials pose challenges in the fabrication of an olfactory sensing array. In this work, the customization of the surface crystal phase of Sr─Fe─O materials (SFO) is demonstrated through the control of annealing temperature, enabling the simple fabrication of an olfactory sensing array using a single precursor. Significantly, the SFO materials exhibit diverse proportions of surface crystal phases, showcasing varied selective characteristics toward volatile organic compounds (VOCs). The materials also demonstrate remarkable responsiveness, linearity, and response/recovery times. Furthermore, this study unraveles the intricate gas-sensor mechanism through first principle calculations, revealing that Fe spin-down d band center of Sr 3 Fe 2 O 7 , located near the Fermi level, significantly enhances the binding strength of intermediates, leading to a higher response specifically to certain VOCs. Integrating these materials into a unified device, the sensor array quantitatively and discriminatively detected different VOCs. The results indicate that SFO materials hold tremendous potential as a promising and easily manufacturable olfactory material system.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Mingli Yue,Bixian Wang,Jianbo Zhao,Liangzhong Lv,Ying Fu,Fei Ye
Cancer, the world’s second leading killer, has increasing crude incidence rates and faces multiple prevention/control challenges. Curcumin (Cur) has anticancer activity but low bioavailability, restricting its use in cancer therapy. A nanomaterial (Fe₃O₄/PDA@Cur) for targeted curcumin delivery is developed in this work, which has a magnetic Fe 3 O 4 core made by solvothermal synthesis and a polydopamine (PDA) shell made by one-pot synthesis. Results show that drug loading rate reached 40.3 % when the mass ratio of Fe₃O₄/PDA: Cur was 1:3. The hemolysis rate was measured to be 1.24 % in the hemocompatibility test. The complex exhibited good antibacterial efficacy against both Staphylococcus aureus ( S. aureus , MIC 250.0 μg/mL and MBC 500.0 μg/mL), Escherichia coli ( E. coli , MIC 625.0 μg/mL and MBC 1250.0 μg/mL), which was attributed to the properties of the incorporated PDA. The material has good blood compatibility and antibacterial effects, and it effectively prevents secondary infection at the tumor site and red-blood-cell lysis. Notably, at pH 5.0, drug release reached 75.5 % via pH-responsive mechanisms which tumor microenvironment (pH 5.0–6.5), drug release is accelerated in these regions, enabling targeted therapy that minimizes toxicity to normal cells and systemic side effects, thereby enhancing treatment safety. This complex, which possesses both drug delivery and antibacterial properties, holds significant clinical importance for preventing opportunistic infections during tumor treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanzhi Cai,Xue Huang,Laifei Cheng,Yalong Chai,Zixuan Yu,Mingxing Chen,Shaoxiong Ren,Jiaoe Dang
Achieving self-supporting superflexible binder-free composites where all components serve simultaneously as structural backbones and microwave-absorbers is a technical challenge. This study successfully combined several microwave absorbing materials, including Fe 3 O 4 , NiCo-MOF derivatives, and CNTs, into a binder-free self-supporting superflexible Buckypaper in one step through directional pressure filtration. Fe 3 O 4 -CoNi-MOF was in-situ grown on a single CNT to form a magnetic MOF-coated CNT (CNT@MOF), which was then subjected to high-temperature carbonization to obtain a magnetic MOF-derived carbon-coated CNT (CNT@Fe 3 O 4 /CoNi-C). The combination of Fe₃O₄/CoNi-MOF and CNTs simultaneously promotes magnetic loss and dielectric loss, thereby significantly enhancing impedance matching and electromagnetic energy attenuation capabilities. The optimal carbonization temperature for the CNT@Fe 3 O 4 /CoNi-C Buckypaper is 700 ℃, at which the minimum reflection loss (RL min ) is −58.12 dB and the absorption bandwidth is 5.02 GHz. The interweaving of CNTs forms a robust yet superflexible skeleton, while the in-situ growth of Fe₃O₄/CoNi-MOF derivatives on a single CNT enhances the structural stability of the skeleton. The Buckypaper remains intact after repeated 2 mm-radius curling, knotting, 180° bending. Therefore, this study presents new insights into the preparation of self-supporting, superflexible MOF-derived microwave absorption materials.
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