SOLID STATE SCIENCES
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2025
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IF 3.3
Shutian Lin,Xinli Zhang,Yingzhi Chen,Yuanhong Zhong,Gao Cheng,Lin Yu
The Fe-N-C catalyst was synthesized using loofah sponge-derived carbon and applied for peroxymonosulfate (PMS) activation to degrade organic pollutants. The catalyst, featuring highly dispersed single-atom Fe on the N-C framework, showed outstanding activity for phenol degradation across a wide pH range. The incorporation of Fe significantly boosted the catalytic performance, achieving rapid degradation of phenol at 20 mg L −1 within 10 min, using 0.5 mmol L ‒ 1 of PMS and 0.2 g L −1 of catalyst. Electron paramagnetic resonance (EPR) and reactive oxygen quenching experiments identified the singlet oxygen ( 1 O 2 ) and superoxide radical (O 2 •‒ ) as the main reactive oxygen species, with the former playing a key role. It has been demonstrated that the Fe-N x structures were the active sites that facilitated the generation of 1 O 2 , thereby enhancing the catalytic activity of the Fe-N-C materials. The catalyst also effectively addressed pollutants like Rhodamine B and climbazole, indicating its potential for environmental remediation. The synthesis approach for Fe-N-C is applicable to other transition metals, such as Mn, Co, Ni, Cu, and Zn, providing valuable insights for the development of highly efficient and durable M-N-C catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Qisheng Huang,Shaojian Xie,Lei Sheng,Lei Huang,Jia Yan,Zhenxin Chen,Meng Li,Hongguo Zhang
Fluoride pollution is becoming increasingly serious with industrial growth. Controlling fluoride pollution have become important environmental issues of global concern. Transition metal nitrides are excellent CDI electrode materials due to their excellent conductivity and electrochemical stability. In this study, FeN x /C was synthesized as an electrode material for using the capacitive deionization (CDI) technique to achieve the effective removal of fluoride ions from wastewater. Its high specific surface area (463.278 mg/g) and high capacitance (44.29 F/g) were demonstrated and it had a high adsorption capacity of 158.33 mg/g. FeN 3 and FeN 4 were used as the main sites as capacitive deionization for removing fluoride from the water by chemisorption and hydrogen bonding. The higher adsorption energy by density functional calculation also indicated that the existence of Fe-N coordination bond effectively improved its electrosorption capacity. This study is beneficial to provide references and research ideas for removing fluoride in the CDI field.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Hongbing Mao,Huijun Wang,Yanyan Xing,Deyong Wang,Xiujun Cao,Jie Yu,Junya Yan
In this work, a boronic acid decorated mesoporous iron-based metal-organic framework (MIL-100(Fe)-B) nanozyme as an efficient immobilization matrix for glucose oxidase (GOx) was designed and prepared through a facile microwave-assisted metal-ligand-fragment co-assembly strategy. Compared with the unboric acid-modified MIL-100(Fe), boron-doped MIL-100(Fe) exhibited enhanced peroxidase-like activity, which was mainly due to the introduced B causing MIL-100(Fe) defects, accelerating mass transfer, facilitating more active sites for H2O2 decomposition. Besides, the MIL-100(Fe)-B nanozyme possessed sufficient recognition sites for immobilizing glucose oxidase with little enzyme leakage to form a cascade nanozyme with both peroxidase-like and cascade catalytic activities. A colormetric biosensor based on the integrated nanozyme reactor (GOx@MIL-100(Fe)-B) was developed for glucose detection. The proposed cascade biosensor had a linear range of 5-150 μM and a limit of detection (LOD) of 0.97 μM (3.3 δ/S). Interestingly, a portable microfluidic paper-based analytic device (μPAD) biosensor based on the cascade nanoplatform was further fabricated for visualized detection of glucose combined with a ColorPicker App on smartphone. It indicated that the integrated nanozyme GOx@MIL-100(Fe)-B was a promising candidate for glucose detection and provided a potentially analytical avenue for biosensing and other applications.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
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IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
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INORGANIC CHEMISTRY
·
2025
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IF 4.7
Jinchang Zhang,Xuefeng Cheng,Jicai Jiang,Apiladda Pattanateeradetch,Shuai Shi,Chanat Chokejaroenrat,Qingfeng Xu,Jianmei Lu
Selective enrichment of cesium ions (Cs+) at ultralow concentrations is essential for resource recovery and radioactive waste disposal, yet efficient adsorbents are lacking. Herein, we reported a Prussian blue analogue (K2Cu3(Fe(CN)6)2, Cu-PBA) decorated on MXene nanosheets by in situ fabrication, forming a composite material termed PMX, for enhanced adsorption of Cs+ in acidic solutions and seawater. The stable, negatively charged MXene effectively anchors Cu2+ precursors and promotes Cs+ adsorption. The synergistic interaction between MXene and the in situ-synthesized Cu-PBA significantly enhances the adsorption performance and water stability of PMX in both acidic solutions and seawater. PMX achieves rapid adsorption equilibrium within 5 min, with a high adsorption capacity of 408.2 mg/g at pH 1, surpassing conventional adsorbents. Moreover, PMX shows excellent Cs+ selectivity (Kd = 68,361.7 mL/g), cycle stability, and notable anti-irradiation ability, demonstrating superior efficiency in Cs+ enrichment from complex matrices. The adsorption mechanism involves electrostatic attraction and K+/Cs+ ion exchange, facilitated by MXene’s functional groups and the Cu-PBA structure. These findings underscore the excellent potential of PMX as an efficient adsorbent for resource enrichment and the removal of radioactive elements such as Cs+.
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PubMed
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MICROCHEMICAL JOURNAL
·
2024
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IF 4.9
Changchang Li,Yue Zhi,Minnan Zhu,Chengyu Yang,Yayang Tian,Tao Chen,Yuan Zhao,Jie Gao,Linfeng Chen
The development of simple, efficient and low-cost methods for rapid on-site monitoring have always been a challenging topic in the field of analysis. Here, we successfully constructed a selective, sensitive and rapid colorimetric sensor for the sensing of diethylstilbestrol (DES) by using molecular imprinting technology to construct specific recognition sites on the surface of Fe-based metal organic frameworks (Fe-MOF) peroxidase-like nanozyme. The surface of obtained sensor (Fe-MOF@MIP) had abundant channels and imprinted cavities that allowed the substrate to enter and responded with Fe-MOF core to drive the chromogenic reaction of 3,3′,5,5′-tetramethylbenzidine (TMB). When DES was present, it could specifically enter the cavities and obstruct the channels of substrate into the Fe-MOF core, thereby inhibiting the chromogenic reaction. The experimental results demonstrate that the sensor had excellent selectivity, anti-interference and catalytic stability. In the linear range of 0 – 1.67 μ M, the detection limit is as low as 8.43 nM, which is superior to peer sensors. To better adapt to in-situ analysis, we have further developed a rapid analysis method based on photo colorimetry, which performed well in real sample analysis and recovery test with the results consistent with the gas chromatograph-mass spectrometer (GC–MS), demonstrating its great potential for rapid on-site monitoring.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-16
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IF 31.6
Zhang Kaili,Yan Yuefeng,Wang Zhen,Ma Guansheng,Jia Dechang,Huang Xiaoxiao,Zhou Yu
Single-atom Fe–N 4 sites embedded into graphene were successfully synthesized to exert the dielectric properties of graphene.
The absorption mechanisms of metal-nitrogen doping reduced graphene oxide mainly include enhanced dipole polarization, interface polarization, conduction loss and defect-induced polarization.
Excellent reflection loss of − 74.05 dB (2.0 mm) and broad effective absorption bandwidth of 7.05 GHz (1.89 mm, with filler loading only 1 wt%) were obtained.
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MOLECULES
·
2024
·Vol. 29
·期 12
·2868
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IF 4.2
Tingjin Xu,Lu Fan,Zhaokun Xiong,Bo Lai
Fe/Cu bimetallic catalysts have a synergistic effect that can effectively enhance catalytic activity, so Fe/Cu bimetallic catalysts have been extensively studied. However, the efficacy and mechanisms of Fe/Cu bimetallic catalysts’ peroxidation activation have rarely been explored. In this study, Fe/Cu bimetallic materials were fabricated to catalyze different oxidizing agents, including peroxymonosulfate (PMS), peroxydisulfate (PDS), peroxyacetic acid (PAA), and hydrogen peroxide (H2O2), for the degradation of sulfamethoxazole (SMX). The Fe/Cu/oxidant systems exhibited an excellent degradation efficiency of sulfamethoxazole (SMX). In the Fe/Cu/PMS, Fe/Cu/PDS, and Fe/Cu/PAA systems, the main reactive oxygen species (ROS) responsible for SMX degradation were hydroxyl radical (•OH) and singlet oxygen (1O2), while the main ROS was only•OH in the H2O2system. The differences in the surface structure of the materials before and after oxidation were examined, revealing the presence of a large amount of flocculent material on the surface of the oxidized PMS material. Anion experiments and actual body experiments also revealed that the PMS system had a strong anti-interference ability. Finally, a comprehensive comparison concluded that the PMS system was the optimal system among the four oxidation systems. Overall, this work revealed that the PMS oxidant has a better catalytic degradation of SMX compared to other oxidizers for Fe/Cu, that PMS generates more ROS, and that the PMS system has a stronger resistance to interference.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
Bingxin Zhao,Wenyue Jiang,Ziting Li,Peng Zhou,Xiaoshuang Chen,Jinping Wang,Rui Yang,Chunling Zuo
The bifunctional electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) are crucial pivot in water electrolysis territory. In this study, vertically Fe incorporated CoMoP (Fe-CoMoP) nanosheet honeycomb product with super-hydrophilic and aerophobic features was projected and generated through the straightforward hydrothermal technique and phosphatized process. The Fe-CoMoP catalyst exhibits more distinguished intrinsic activity, accessible active sites, effective charge transfer and weak adhesion of gas bubbles. The overpotentials of dual-function Fe-CoMoP are 87.1 mV for HER and 244.4 mV for OER to drive the current density of 10 mA cm −2 . At room temperature, the overall water splitting reaction of Fe-CoMoP as cathode and anode is carried out at 1.54 V to reach 10 mA cm −2 with good stability. Simultaneously, the Fe-CoMoP couple electrolyzer also presents remarkable water splitting activity and durability in simulated industry circumstances of 6 M KOH, 60 °C at 500 mA cm −2 , which are close to practical conditions.
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POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Zhishuo Liu,Yifang Hua,Suqin Liu,Hongfei Li,Xiaoyu Gu,Jun Sun,Sheng Zhang
In this study, a novel approach was employed to enhance the flame retardant efficiency of an intumescent flame retardant (IFR) by growing a layered double hydroxides (LDHs) of Zn/Fe on the surface of melamine polyphosphate (MPP), denoted as Zn/Fe-LDH@MPP (LDHMPP). This modification was carried out via in-situ co-precipitation, and the resulting composite was subsequently applied to polypropylene (PP) in conjunction with piperazine pyrophosphate (PAPP). Under the same proportion and concentration, the PP/16 %LDHIFR formulation achieved a preferred V-0 rating in the UL-94 test. Furthermore, this formulation exhibited an enhanced ability to form a protective char layer, as evidenced by both cone calorimetry tests (CCT) and thermogravimetric analysis (TGA) tests. Additionally, the synergistic effect of Zn/Fe-LDH on flame retardancy was also studied.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shanxin Li,Yijing Sun,Fanjian Meng,Xuzhou Jiang,Hongying Yu
Effective integration of multiple functions into microwave absorbing materials is a future development direction, but still remains a significant challenge. This work fabricated a lightweight, multifunctional aerogel through electrostatic self-assembly, freeze-drying and in-situ pyrolysis process, achieving an in-situ composite of magnetic/dielectric components. The regulated pyrolysis temperature achieves a good balance between abundant nanopores and heterogeneous interfaces, enriched defects, and conductivity. This balance induced a synergy of dielectric loss, magnetic loss, and conduction loss at low frequencies, improving the impedance matching. The aerogel obtains a minimum reflection loss (RL min ) of −65.17 dB in the low-frequency range and a maximum effective absorption bandwidth (EAB max ) of 5.76 GHz. The radar cross section (RCS) simulation confirmed its good stealth performance. In addition, an increase in aerogel loading enhanced its electrical conductivity, resulting in a higher electromagnetic interference (EMI) shielding effectiveness (SE) of 81.83 dB, the specific shielding effectiveness (SSE) up to 359.28 dB·cm 3 /g and the absolute shielding effectiveness (SSE t ) up to 1596.82 dB·cm 2 /g. Beyond microwave absorption and shielding, this aerogel also exhibited good hydrophobicity and thermal insulation. This study provides a new perspective for the development of materials with microwave absorption properties in low-frequency bands and multifunctional properties for broader applications in military, communication, aerospace, and other fields.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2024
·
IF 2.5
Zhangqiao Zhou,Qi Li,Meiqi Wen,Ruilin Zhou,Xian Wang
The coatings play a crucial role in enhancing the performance of soft magnetic composites (SMCs). This study aims to create coatings for Fe-Ni-Mo SMCs using polysilazane (PSZ) as the precursor. The transformation mechanism of the PSZ/resin mixture is studied by analyzing functional groups and chemical bonds at various temperatures. During the self-polymerization process of PSZ at 350 °C, N–H, C = C–H, Si-H bonds, –CH 3 , and Si-CH 3 groups undergo crosslinking reactions to form C–C and Si-N bonds. When the temperature reaches 600 °C, PSZ polymer cleavage, O-Si-C and Si-N-Si bond dominate in the coating. Additionally, PSZ can effectively enhance the heat resistance of silicone resin through its reaction with Si-OH groups, which has a significant effect on increasing the resistivity of SMCs and reducing high frequency core loss. Optimizing the PSZ content to 0.5 wt% enhances the magnetic properties of Fe-Ni-Mo SMCs, resulting in a μ e of 74.0 at 100 kHz and a corresponding core loss ( P cv ) of 547.7 mW/cm 3 at 100 kHz/100 mT. The findings provide valuable insights for optimizing PSZ content to improve magnetic performance in SMCs.
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