JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 31
·1-22
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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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Journal of Water Process Engineering
·
2024
·
IF 6.3
Shaorong An,Lina Wang,Qiang Jin
The Fe-N-C catalysts featuring abundant FeNx sites activating peroxymonosulfate (PMS) have been considered an attractive approach to water treatment and purification. It was reported that the coordination numbers of FeNx could be precisely controlled by varying the pyrolysis temperature, thereby affecting the catalytic activity . However, almost all Fe-N-C catalysts were prepared through energy-consuming high-temperature pyrolysis strategies, the activation performance and mechanism under low-temperature pyrolysis conditions are still unclear. In this work, three single-atom Fe catalysts (Fe SA -NC-300/500/1000) based on ZIF-8 were synthesized at different pyrolysis temperatures. Results showed that the degradation efficiency of sulfamethoxazole (SMX) in the Fe SA -NC-500/PMS and Fe SA -NC-1000/PMS systems could reach 100 % within 30 min, while only 91.9 % in the Fe SA -NC-300/PMS system. Combined with the turnover frequency (TOF) of the catalysts, it was found that the catalytic activity of Fe SA -NC-500 prepared by low-temperature pyrolysis was close to that of Fe SA -NC-1000, which was superior to many reported Fenton-like catalysts. Mechanism analysis manifested that both radical (·OH, SO 4 − ·, and ·O 2 − ) and nonradical ( 1 O 2 , high-valent Fe-oxo species, and electron transfer) pathways coexisted in the Fe SA -NC/PMS systems. Impressively, the larger production intensity of reactive species occurred in Fe SA -NC-500/PMS and Fe SA -NC-1000/PMS systems. The difference between these Fe SA -NC catalysts in actual printing and dyeing wastewater treatment offered some guidance for wider environmental applications. This work also provided a direction on the design and understanding of green and energy-saving Fe-N-C catalysts.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Chengwu Zhang,Anqi Yang,Bing Qin,Wei Zhao,Chuipeng Kong,Chuanyu Qin
It has been reported that tripolyphosphate (TPP) can effectively enhance the activation of O 2 by Fe(II) to remove organic pollutants in the environment. However, the influence of solution pH on the generation and conversion of reactive oxygen species (ROS) and their degradation of pollutants in the Fe(II)/O 2 /TPP system needs further investigation. In this study, we demonstrated that O 2 •– and •OH were the main ROS responsible for degradation in the system at different pH conditions, and their formation rates were calculated using a steady-state model. Experiments combined with density functional theory (DFT) calculations showed that the p -nitrophenol (PNP) degradation pathway in the Fe(II)/O 2 /TPP system is regulated by solution pH. Specifically, at pH = 3, the existence of Fe(II) in the solution is dominated by [Fe(II)(HTPP) 2 ] 2− , which leads to a rapid conversion from O 2 and HO 2 • to generate •OH, and PNP is primarily oxidatively degraded. However, at pH = 5/7, [Fe(II)(TPP) 2 ] 4− is taking the lead with which O 2 •– is accumulated in the solution due to the slow conversion to •OH in this condition, and the PNP is mainly reductively degraded. This study proposes a new strategy to achieve the targeted oxidative/reductive removal of different types of pollutants by simply varying the solution pH in the Fe(II)/O 2 /TPP system.
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ACS Sensors
·
2025
·
IF 9.1
Chonghui Zhu,Huan Wang,Zhaorui Zhang,Chenshuai Han,Huashuai Hu,Minghui Yang
Food spoilage leads to significant waste and poses serious health risks, yet real-time monitoring solutions remain limited throughout the supply chain and storage. Herein, we develop a Pt/Fe-TiN-based fuel cell gas sensor for highly sensitive and selective detection of hydrogen sulfide (H2S), a key indicator of meat spoilage. Fe doping in TiN effectively modulates the electronic structure of Pt, enhancing H2S sensitivity and mitigating humidity interference. The Pt/Fe-TiN sensor achieves a detection limit of 100 ppb and remains fully operational even at −18 °C. Compared to commercial Pt/C electrodes, it exhibits superior stability, retaining over 97% of its sensitivity after 60 days under high humidity. Furthermore, a real-time H2S monitoring device integrated with a smartphone interface was developed for continuous spoilage detection in meat storage. This work provides a practical, real-time sensing platform for food safety monitoring, contributing to reduced waste and improved supply chain transparency.
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COMPOSITES PART B-ENGINEERING
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2025
·
IF 14.2
Weibin Bai,Jialin Chen,Xinghang Chen,Shijing Zheng,Shuhao Yuan,Rongkun Jian,Yucai Lin
Due to fast response and precise controllability, photothermal responsive shape memory materials have developed into a promising platform for intelligent sensing systems. In this paper, we have developed a multifunctional composite material by combining molecularly-engineered polyurethane matrix with biomass photothermal nanoparticles. The shape memory polyurethane was synthesized using polytetramethylene 2000 as the soft segment, hexamethylene diisocyanate as the hard segment, and 1,4-butanediol/4,4′-dithiodianiline as chain extenders, achieving an optimized structure with coordinated balance between soft and hard segments. The urushiol-iron polymer encapsulated Fe 3 O 4 composite particles (urushiol-Fe particles) prepared through a one-step chelation/oxidation of natural urushiol and green-vitriol, provided outstanding photothermal conversion while maintaining excellent interfacial compatibility. By controlling the nanoparticle content (less than 1 wt%) to optimize interfacial interactions, the composite exhibits enhanced mechanical tensile strength (17.21 MPa), excellent shape memory performance (95.56 % fixation, 97.78 % recovery), and wide-temperature-range shape memory (37–80 °C), along with multifunctionalities including on-demand sterilization (100 % inhibition), rapid photothermal ethanol-assisted self-healing (95.58 % recovery in 30 min), durable light-triggered actuation (1000+ cycles) and precise light triggered shape deformation performance. Furthermore, the designed combination logic device driven by photothermal-environment synergy significantly improved temperature detection accuracy. This study establishes an innovative system for photothermal-responsive intelligent materials while opening new pathways for advanced sensing systems with excellent functionality and reliability. Future research should focus on overcoming thermal inertia-induced response delays and optimizing manufacturing processes to enable real-world applications across diverse fields including smart remote sensing, environmental surveillance, soft robotic systems, and biomedical instrumentation.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zhaobo Wang,Tao Yu,Xiaomao Liu,Jinsheng Li,Xuanwen Liu,Rui Guo
To improve the performance of MIL-100(Fe) in the photo-peroxydisulfate (photo -PDS) degradation system, this study introduced the amino-containing bidentate ligand 5-aminoisophthalic acid (AIA) to simultaneously engineer structural defects and photosensitive sites, thereby synergistically enhancing both photocatalytic activity and metal-mediated catalytic capability. This study synthesized MIL-100(Fe) materials with varying AIA incorporation levels (denoted as M-x %NH₂) and systematically investigated the effects of AIA integration on the catalyst. Degradation experiments were performed in the photo-PDS system using rhodamine B (RhB) as a model pollutant. The results demonstrate that the introduction of AIA induced multiple advantageous effects in the photo-PDS process:1.It enhanced the visible-light absorption capacity;2.Improved the separation efficiency of photogenerated charge carriers;3.Generated defects to increase metal active sites, thereby accelerating PDS activation. Among the samples, M-30 % NH₂ exhibited the optimal performance, achieving nearly complete degradation of RhB within 50 min. The pseudo-first-order rate constant (k) was three times higher than that of unmodified MIL-100(Fe). The catalyst retained approximately 90 % degradation efficiency after five consecutive cycles and demonstrated robust performance across pH 3–9, along with the capability to degrade diverse organic pollutants. Quenching experiments confirmed sulfate radicals (·SO 4 ⁻) and hydroxyl radicals (·OH) as the main active species, and the degradation pathways were elucidated. This study provides foundational insights for modifying MIL-100(Fe) and developing high-efficiency PDS catalysts.
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Nano Energy
·
2021
·
IF 17.881
Rui Qi,Mihai Chu,Wenguang Zhao,Ziwei Chen,Lei Liao,Shisheng Zheng,Xiping Chen,Lei Xie,Tongchao Liu,Yang Ren,Lei Jin,Khalil Amine,Feng Pan,Yinguo Xiao
Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems , on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na 0.65 Li 0.08 Cu 0.08 Fe 0.24 Mn 0.6 O 2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g −1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Ruya Guo,Li Xue,Gaozhe Cai,Wuzhen Qi,Yuanjie Liu,Jianhan Lin
Early screening of Salmonella is of utmost importance to minimize the incidence of related foodborne diseases. Here, we reported an immunosensor to fast detect Salmonella using Fe-MIL-88NH2 metal–organic framework (Fe-MOF) nanocubes to load platinum nanoparticles (PtNPs) for signal amplification and smartphone thermal imaging to monitor the temperature change. The Fe-MOF nanocubes decorated with PtNPs (Fe-MOF/PtNPs) were prepared as peroxidase mimics to catalyze hydrogen peroxide (H2O2) to produce O2. The immune magnetic nanoparticles (MNPs), the target bacteria, and the immune Fe-MOF/PtNPs were first mixed by the three-dimensional (3D) chaotic micromixer and conjugated in the microfluidic chip to form MNP–bacteria–Fe-MOF/PtNPs sandwich complexes. After magnetic separation and washing, H2O2 was injected and decomposed by Fe-MOF/PtNPs on the sandwich complexes to generate O2 in a sealed chamber. The increase in the pressure pushed the preloaded water to react with calcium oxide powder, resulting in the generation of heat, which was measured using the smartphone-based thermal sensor to determine the bacteria. The microfluidic immunosensor could detect Salmonella as low as 93 CFU/mL within 1 h.
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ANALYST
·
2020
·Vol. 146
·期 3
·896-903
·
IF 3.978
Xiaolei Xie,Yufei Wang,Xiaobin Zhou,Junyang Chen,Mengke Wang,Xingguang Su
Single-atom nanozymes have drawn wide attention in bio-sensing for their remarkable merits such as low cost, high stability, and maximum atom utilization. Herein, a colorimetric strategy based on Fe–N–C single-atom nanozymes (Fe/NC-SAs) was established for the detection of alkaline phosphatase (ALP) activity. The Fe/NC-SAs prepared by pyrolysis have excellent peroxidase-like activity and can oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue color product in the presence of hydrogen peroxide (H2O2). When ascorbic acid (AA) is added to the system, the blue color fades, and the absorbance has a linear relationship with the concentration of AA. Alkaline phosphatase (ALP) can catalyze the hydrolysis of ascorbic acid 2-phosphate (AAP) to produce AA. Thus, a strategy based on Fe/NC-SAs for the detection of ALP activity was established, which provided a linear range of 0.1–1.5 U L−1 and a limit of detection as low as 0.05 U L−1. Besides, Fe/NC-SAs showed high stability under harsh conditions. Moreover, an Fe/NC-SA-based assay was successfully validated using human serum samples for ALP determination with satisfactory results, and has broad prospects in the field of biosensing.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 2
·116098
·
IF 7.2
Ruiling Luo,Zhongcheng Yang,Yucheng Wang,Yue Yang,Lanyue Qi,Junwen Qi,Zhigao Zhu,Yujun Zhou,Jiansheng Li
Bisphenol (BPA) poses significant risks to the environment. Application of advanced oxidation processes with membrane filtration systems is an effective approach to pollutants removal and membrane fouling control. Herein, we successfully fabricated a Fe-loaded ZIF-8 hollow fiber carbon microfiltration membrane and applied it to the in-situ electro-Fenton process for BPA removal. The graphitic-N promotes the efficiency of electron transfer and the adsorption capacity of O 2 , while the introduction of pyridinic-N on the membrane enhances the selectivity of 2e - oxygen reduction reaction, facilitating the production of hydroxyl radicals. According to the results, the contact angle and resistance of the membrane were 65° and 33.2 Ω, respectively. The hydrophilicity facilitates a water film formation on the surface of membrane, thus preventing deep membrane pore blockage by pollutants. The good conductivity could accelerate electrochemical reactions and enhance electrostatic repulsion. Therefore, the BPA removal rate was 38.29 % with 0.72 L/(m 2 ·h·bar) flux loss for continuous 4-hour filtration under microfiltration conditions. For the control group without bias, the removal rate at the 4th hour was only 16.8 % with 3.59 L/(m 2 ·h·bar) flux loss, indicating a significant weakening of adsorption effect and severe membrane fouling. This study lays the foundation for the application of electro-Fenton technology in wastewater treatment with membrane as cathode.
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JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Ruobing Wang,Hongli Zheng,Changfu You,Haiming Wang
Chemical looping reforming of methane (CLRM) is a promising technology for syngas production, offering efficient utilization of CH 4 to generate syngas with a desirable H 2 /CO ratio for downstream applications. This study investigated the influence of Ni incorporation in Y-Fe-Al garnet-type oxygen carriers (OCs) in CLRM. The Ni 0.2 -Y-Fe-Al OC demonstrated a pronounced enhancement in performance compared to its undoped counterpart, elevating the methane conversion from 66.6 % to 98.4 % and increasing the syngas yield from 5.79 to 8.38 mmol g −1 at 850 °C. The incorporated Ni species introduced additional active sites for methane activation, enhanced surface basicity, and improved lattice oxygen mobility, which collectively facilitated the selective oxidation of methane to syngas, especially at low temperatures (<850 °C). Cyclic tests confirmed that Ni incorporation enhanced the redox stability and mitigated phase segregation, leading to sustained high reactivity over multiple cycles. In situ DRIFTS analysis verified that the fundamental reaction pathway, proceeding via the -CH 3 →-CH 2 →-CHO intermediates, remained unaltered after Ni addition. This work established that incorporating Ni in garnet-type OCs is an effective strategy for enhancing both redox activity and cyclic stability in CLRM systems.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 24
·期 1
·272
·
IF 6.208
Lei Chen,Yijia Yin,Linjia Jian,Xianglong Han,Xuefeng Zhao,Donghui Wang
Osteogenic and antibacterial abilities are the permanent pursuit of titanium (Ti)-based orthopedic implants. However, it is difficult to strike the right balance between these two properties. It has been proved that an appropriate alkaline microenvironment formed by Ti modified by magnesium–aluminum layered double hydroxides (Mg–Al LDHs) could achieve the selective killing of bacteria and promote osteogenesis. However, the existence of Al induces biosafety concerns. In this study, iron (Fe), an essential trace element in the human body, was used to substitute Al, and a calcinated Mg–Fe LDH film was constructed on Ti. The results showed that a proper local alkaline environment created by the constructed film could enhance the antibacterial and osteogenic properties of the material. In addition, the introduction of Fe promoted the Fenton reaction and could produce reactive oxygen species in the infection environment, which might further strengthen the in vivo bactericidal effect.Keywords:antibacterial;osteogenic;Mg–Fe layered double hydroxides;alkaline microenvironment;Fenton reaction
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