TETRAHEDRON
·
2011
·Vol. 67
·期 41
·7909-7912
·
IF 3.011
Wei Lu,Han Jiang,Fangyu Hu,Liming Jiang,Zhiquan Shen
A novel fluorogenic receptor 1 was prepared by the reaction of thiosemicarbazide with 1-naphthaldehyde. Based on in situ-formed 1 –Fe(III) complexes having the specific binding affinity for F − anions, this sensory system allows rapid recognition and quantitative detection of fluoride in neutral aqueous media in an ‘off–on’ fashion. The fluoride measurement method not only exhibits a low detection limit but also has strong anti-interference ability to common coexisting ions, as evidenced by competitive experiments.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Xianjin Qi,Guizhi Yan,Boyu Du,Mengmeng Wang,Yongkui Li
Arsenic (As) contamination is a global problem that requires innovative remediation, this study successfully synthesized a novel MnFe 2 O 4 -Zn/Co ZIFs@MIL-53(Fe) (MFZM) using a solvent method to remove As(V) from contaminated water. The MFZM exhibited a rhomboidal dodecahedron structure with a high specific surface area of 158.93 m 2 /g, which contributed to its exceptional adsorption performance under both acidic and neutral pH conditions. Notably, the adsorption capacity for As(V) reached approximately 599.90 mg/g at an equilibrium concentration of 500 mg/L, surpassing the performance of several previously reported adsorbents. The kinetic modelling results indicated that the adsorption process followed a pseudo-second-order mechanism, suggesting chemisorption as the dominant process. However, the isotherm studies demonstrate favorable single-layer adsorption, with the Langmuir model providing the best fit for the experimental data. The X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS) analysis revealed that the Fe/Mn/Co on the MFZM surface can hydrolyze and generate Fe/Mn/Co-OH groups under pH conditions ranging from 3 to 7, facilitating the formation of stable coordination complexes with As(V). Furthermore, the MFZM provided abundant positively charged adsorption sites that effectively attracted HAsO 4 2− via electrostatic interactions, leading to efficient As(V) removal. These findings underscore the potential of the MFZM as a promising adsorbent for the effective remediation of As-contaminated wastewater, supporting sustainable environmental management.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Mingjuan Fan,Fenglei Wang,Weijian Tang,Qingping Wang,Jiafeng Cao,Maoqin Qiu,Wenming Li,Wentuan Bi
The practical application of direct-ammonia protonic ceramic fuel cells (DA-PCFCs) is constrained by the sluggish decomposition of ammonia and the structural degradation of conventional Ni-based anodes. Herein, a multifunctional anode is developed by depositing a Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6-δ (SFRM) perovskite catalytic layer onto a Ni-BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ cermet. Under operating conditions, this layer enables the in-situ exsolution of uniformly dispersed and sintering-resistant Ru–Fe alloy (RFA) nanoparticles, thereby creating a stable and catalytically active interface. The SFRM-modified single cell achieves peak power densities of 1.33 cm –2 and 1.02 cm –2 at 700 °C in H 2 and NH 3 , respectively, with the NH 3 -fueled performance representing a 15.9 % improvement over the unmodified single cell. Moreover, the cell exhibits excellent durability, operating stably for over 100 h in NH 3 . Combined experimental and density functional theory calculations reveal that the exsolved RFA nanoparticles not only lower the energy barrier for NH 3 dehydrogenation but also, via strong metal-support interaction, regulate interfacial charge transfer and suppress Ni 0 coarsening. This strategy successfully decouples high catalytic activity from long-term stability, providing an effective pathway for durable, high-performance DA-PCFCs.
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Desalination and Water Treatment
·
2026
·
IF 3.4
Hao Li,Minru Su,Chen Shi,Rouyi Wang,Anqi Xu,Xiaolan Shen
High catalytic activity and long-term stability of particle electrodes are key to three-dimensional electro-activated peroxydisulfate (3D-E-PDS). This study developed the Fe-based reduced graphene oxide (Fe/rGO) hydrogel particle electrodes prepared using a low-temperature hydrothermal method, demonstrating a 9.77-fold increase in tetracycline hydrochloride (TCH) degradation rate compared with conventional two-dimensional (2D) E-PDS system. The structural properties and catalytic activities of the Fe/rGO hydrogel particles clearly depended on the iron precursor, with the Fe 3 + -derived hydrogel exhibiting the highest catalytic activity. After systematically optimizing the operational parameters (PDS concentration, current density, particle dosage, initial solution pH, TCH concentration, and agitation rate), the 3D-E-PDS system achieved a TCH degradation efficiency of 94.44% and total organic carbon removal efficiency of 46.62% within 2 h. In water matrices, Cl − promoted TCH degradation, whereas SO 4 2− , PO 4 3− , and especially CO 3 2− inhibited the degradation. Radical quenching experiments identified SO 4 · − , ·OH, 1 O 2 , and ·O 2 − as the primary reactive species. After six cycles, the 3D-E-PDS maintained a TCH degradation efficiency of 82.56%, with a degradation rate 2.56 times higher than that of the 2D-E-PDS system, validating its stability and reusability. Overall, this study establishes a one-step hydrothermal synthesis protocol for Fe/rGO hydrogel particle and demonstrates the efficacy of 3D-E-PDS in TCH degradation.
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Lei Huang,Xue Zou,Ensi Li,Dongmei Wang,Imran Shakir,Xuping Sun,Zhengjun Gong
Advanced oxidation process of inorganic peroxide activation is regarded as an effective and reliable method for antibiotics removal. In this paper, we report on the development of Fe-O-coordinated porous honeycomb carbon nanofiber (Fe-O-HCNF) as a high-performance catalyst for rapid degradation of tetracycline (TC) by activation of peroxymonosulfate (PMS). The effects of Fe-O-HCNF dose, PMS concentration, and initial pH were systematically investigated. The results showed that such Fe-O-HCNF achieved a high TC degradation efficiency of 84.7% within 15 minutes. Notably, complete TC degradation (100%) was achieved within 8 minutes at an low catalyst dosage of 0.08 g/L. The Fe-O-HCNF possessing exceptionally high specific surface area of 691.501 m²g-1 provides abundant adsorption and activation sites for the degradation reaction, while the introduction of iron is essential for the continuous activation of PMS. The electron paramagnetic resonance and quenching experiments results indicated that, in addition to sulfate (•SO4−) and hydroxyl (•OH), both singlet oxygen (1O2) and superoxide (•O2−) contribute to the degradation of TC. More interestingly, the Fe-O-HCNF /PMS system showed almost no interference in the real water matrices and various initial pH conditions. Importantly, no metal ion leaching was detected in the treated effluent, indicating minimal secondary environmental contamination risks from heavy metal leaching.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Wenjuan Luo,Xiunan Cai,Zhongqiu Luo,Chaochao Lai,Qian Long,Xue Yang,Limin Ning,Pingyan Wang,Xiang Zhang,Xin Fu,Xintao Zhou
Developing efficient and cost-effective processes for removing highly toxic As(III) from water is critical for environmental restoration. Herein, an amorphous Fe–Mn composite (A-CSM) rich in oxygen vacancies was synthesized via a one-pot process. Acid etching of a pretreated copper slag product created the chemical conditions that simultaneously enabled the in situ anchoring of MnO x clusters and induced a crystalline-to-amorphous transformation. The resulting strong Fe–O–Mn interfacial coupling drives interfacial electron redistribution, which upshifts the d-band center and thereby endows the material with unique capabilities for O 2 activation and arsenic adsorption. Leveraging abundant oxygen vacancies within the amorphous structure, A-CSM efficiently activates O 2 into •O 2 − radicals to drive spontaneous As(III) oxidation to As(V), while exposed unsaturated sites in amorphous FeO x domains provide rapid adsorption sites for As(V). Consequently, A‑CSM exhibits a broad pH range (3–9), rapid adsorption kinetics (achieving complete removal of 5 mg L −1 As(III) within 30 min, which is 24.7 times faster than its crystalline counterpart, CSM), the q max calculated by Langmuir model is 84 mg g −1 , and good reusability over five consecutive cycles. Mechanistic studies confirmed that the synergy between the acid etching‑induced amorphous structure and oxygen vacancies significantly reduces the O 2 adsorption energy while it upshifts the d‑band center. This effect lowers the energy barrier for As(III) oxidation/adsorption by approximately 48.9%, and substantially enhances •O 2 − generation. Adsorption primarily involves complexation, electrostatic interactions, and hydrogen bonding, which is consistent with a heterogeneous multilayer process as described by the Freundlich isotherm.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Chen Chen,Guo Yan,He Leilei,Liang Ying,Zhang Mingxin,Wang Wenmin,Chen Yuliang,Wu Yuliang,Meng Rui,Huang Weiwei,Yang Fei,Cheng Jun,Yi Xuesong
The development of efficient and cost-effective catalytic systems for antibiotic degradation remains a significant challenge in environmental remediation. Herein, a novel Co/CuFe 2 O 4 composite was synthesized via a sol–gel combustion method to construct a multi-metal synergistic photocatalytic-Fenton-like system for the degradation of oxytetracycline (OTC). Density functional theory (DFT) calculations indicate that the incorporation of Co leads to a more negative material formation energy, suggesting that Co/CuFe 2 O 4 has a more stable electronic structure. This optimized electronic structure enhances the redox cycle (Fe 3+ /Fe 2+ , Cu 2+ /Cu + , and Co 2+ /Co 3+ ), thereby improving the activation efficiency at low concentrations of H 2 O 2 (0.1–6 mmol/L). Under optimal conditions (pH 3, 35 °C, 4 mmol/L H 2 O 2 ), the 13% Co/CuFe 2 O 4 catalyst achieved complete OTC degradation within 60 min, with an 0.1 mmol/L H 2 O 2 utilization rate of 17.81% at neutral pH. Moreover, the catalyst exhibited excellent stability, retaining 87.5% degradation efficiency after five cycles. Radical quenching experiments confirmed that ·OH, h + , and ·O 2 − were the dominant reactive species, while the synergistic effect of multiple metal redox pairs facilitated efficient electron transfer and H 2 O 2 activation. This work provides a promising strategy for designing high-performance Fenton-like catalysts with broad pH adaptability and low oxidant consumption, offering significant potential for the treatment of antibiotic-contaminated wastewater. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yaozu Guo,Junhua You,Wenli Pei,Yingdong Qu,Dong Zhao,Zhengwen Yang
This paper reports a novel chemical method to synthesize Nd-Fe-B magnetic nanoparticles . The fabrication mechanism of the particles have been studied through understanding formation of the corresponding intermediate phases as well as their microstructures after annealing and reduction-diffusion processes as function of the (C 2 H 5 ) 3 NBH 3 content. Nd-Fe-B intermediate phases were composed of small Fe 3 O 4 particles and Nd and Fe microcrystals encapsulated with nitriles . Fe 3 O 4 was reduced by BH 3 − into α-Fe as the (C 2 H 5 ) 3 NBH 3 content increased. After annealing, Nd-Fe-B oxide particles gradually agglomerated as the (C 2 H 5 ) 3 NBH 3 content increased, which affected the particle sizes after the reduction-diffusion step. Mixture of Nd 2 Fe 14 B and H 5 Nd 2 was obtained from precursors synthesized with 1.5 and 2.5 mmol of (C 2 H 5 ) 3 NBH 3 . Magnetic properties of these mixtures demonstrated soft magnetic phase characteristics. Relatively pure Nd 2 Fe 14 B nanoparticles with a coercivity of 5.09 kOe and magnetic energy product (BH max ) of 2.862 MGOe were obtained when (C 2 H 5 ) 3 NBH 3 initial content was 3.5 mmol. Exchange coupling nanoparticles of Nd 2 Fe 14 B, Fe 3 B and Fe 2 B were obtained with the coercivity of 3.787 kOe and (BH) max equal to 4.871 MGOe at (C 2 H 5 ) 3 NBH 3 content of 4.5 mmol.
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Fangfang Ye,Xiaoying Jin,Jiajiang Lin,Zuliang Chen
A nitrogen-doped and CaO-activated pinewood biochar ( N -aPBC) was synthesized. • Closed-loop recycling strategy enables electroplating wastewater treatment. • N -aPBC achieves high Fe 3 ⁺/Cu2⁺ adsorption capacities of 287.40/61.88 mg g⁻1. • N/O functionalities and defects promote Fe 3 ⁺/Cu2⁺ uptake via surface interactions. • Spent adsorbent-derived Fe-Cu-NaB removes 93.64% CIP from swine effluent. The efficient removal and resource recovery of high-concentration heavy metals like Fe 3 ⁺ and Cu 2 ⁺ from electroplating wastewater remains a critical challenge. Herein, a sustainable closed-loop “adsorption-transformation-upcycling” strategy was proposed. Initially, a nitrogen-doped and CaO-activated pinewood biochar ( N -aPBC) was synthesized via synergistic modification. Systematic characterization revealed that N -aPBC features a high specific surface area (188.79 m 2 g⁻ 1 ), a hierarchical porous architecture, and abundant nitrogen-containing functionalities. Adsorption experiments demonstrated superior performance for Fe 3 ⁺ and Cu 2 ⁺, yielding maximum capacities of 287.40 and 61.88 mg g⁻ 1 , respectively. Mechanistic investigations indicated that the adsorption followed the pseudo-second-order kinetic model and Langmuir isotherm, suggesting monolayer chemisorption. The primary removal mechanisms involved surface complexation via N/O-functional groups, coupled with electrostatic attraction and ion exchange. N species and defects tuned surface polarity and electronic structure. Subsequently, the spent adsorbent was calcined to produce a functional material (Fe-Cu-NaB). Electrochemical analyses confirmed that Fe-Cu-NaB exhibited lower charge transfer resistance and enhanced electrocatalytic activity. Notably, Fe-Cu-NaB enhanced the oxidative degradation capacity, achieving high removal rates of 93.64% for ciprofloxacin (CIP) and 65.88% for total organic carbon (TOC) in swine wastewater. This work provides a high-performance adsorbent for heavy metal remediation and establishes a viable pathway for the high-value reutilization of spent adsorbents as efficient catalytic materials. Download: Download high-res image (142KB) Download: Download full-size image
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yue Qian,Xiaopeng Luo,Ying Mao,Haiyang Gu,Lan Zhang,Xiaomin Zhang,Xuejing Shen,Rui Zhu,Zhanjun Wu
Transition metal-modified carbon composites have emerged as promising candidates for electromagnetic wave (EMW) absorption due to their tunable microstructure and tailorable electromagnetic properties. However, the influence of metal species configuration on dielectric loss at the atomic scale remains less understood. In this work, we fabricated three types of M-NC absorbers (M = Fe, Co, and Ni; NC = N-doped carbon) using a unified method that includes templating, pyrolysis, and acid etching. This approach produced samples with similar porous structures, which helped minimize structural differences and isolate the effect of the metal species. Among them, Ni-NC achieved a minimum reflection loss of −39.7 dB at 13.3 GHz with a matching thickness of only 2.0 mm, much better than Fe-NC (−22.5 dB) and Co-NC (−27.3 dB). This superior performance is attributed to the specific metal-N bonding structure, which governs both the interfacial polarization and the electronic structure. Meanwhile, the 3D carbon porous framework promotes impedance matching and extends the EMW propagation path through multiple scattering, collectively enabling superior absorption performance. Radar cross section simulation results confirm the effective EMW attenuation of these composites, particularly Ni-NC, highlighting their potential suitability for stealth applications. This work provides fundamental insights for the rational design of high-performance, lightweight EMW absorbers through precise chemical structure engineering.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Qinbo Cao,Xingguo Huang,Li Guo,Haohua Qin,Lingpan Du,Menglai Wang,Dianwen Liu,Peilun Shen
PS/Fe 2+ /Cu 2+ reagents inhibited PbS flotation with 30 s of reaction. • Cu 2+ raised the SO 4 • − yield in the PS/Fe 2+ /Cu 2+ solution. • SO 4 • − oxidized the PbS surface, producing PbO and SO 4 2− . • Cu 2+ raised the Fe 3+ concentration in solution and improved the Fe 2+ /Fe 3+ cycle. Galena (PbS) depression in PbS–chalcopyrite (CuFeS 2 ) mixture via SO 4 • − radicals generated from persulfate (PS)/Fe 2+ typically requires a high PS concentration (0.15 mol/L) and a prolonged reaction time (10 min). This study employed a combined Cu 2+ /Fe 2+ catalyst to enhance SO 4 • − generation at a lower PS concentration. Flotation tests were conducted to determine optimal PbS treatment conditions using the PS/Fe 2+ /Cu 2+ system. The results showed that effective PbS depression was achieved with a PS concentration of 6.5 × 10 −3 mol/L and a reaction time of only 30 s. The synergistic role of Cu 2+ was investigated using surface analyses, including contact angle tests, XPS, Raman and UV-visible spectra. Contact angle measurements revealed that after 30 s of treatment, the PbS surface angle decreased to 38.2°, whereas the CuFeS 2 surface remained hydrophobic. Oxidation products, including PbO and SO 4 2− , formed on the PbS surface. SO 4 • − and •OH both existed in the system to react with the PbS surface, and SO 4 • − was the major radical species as indicated by the radical quenching tests. UV–visible spectrum results implied that Cu 2+ increased the equilibrium Fe 3+ concentration, thereby facilitating the Fe 2+ /Fe 3+ cycle and sustaining PS activation. The rapid oxidation capacity of the PS/Fe 2+ /Cu 2+ system demonstrates strong potential for industrial application. Download: Download high-res image (202KB) Download: Download full-size image
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·462
·
IF 5.4
Zhao Yunfei,Fang Jiale,Zhang Baofeng,Wang Yan,Wu Lianbin,Pan Qinghua,Zhou Ziyun,Jiang Kezhi
A superhydrophobic magnetic nanomaterial, Fe 3 O 4 @C16&TMS, was synthesized by hexadecylating the surface of the Fe₃O₄ nanoparticles and sealing the residual hydroxyl groups. The nanomaterial exhibits a high specific surface area of 45.3 m²/g, and superhydrophobicity with a water contact angle of 158.11°. The high specific surface area offers numerous adsorption sites, and the superhydrophobic characteristics of the synthesized nanomaterial can selectively enrich non-polar volatile methylsiloxanes (VMSs) through hydrophobic interactions, thereby significantly enhancing extraction efficiency and reducing matrix interference. Notably, no significant decline in performance was observed after 6 consecutive reuse cycles. Based on this material, a rapid and simple method for the determination of VMSs in water was developed using magnetic solid-phase extraction (MSPE) coupled with gas chromatography-mass spectrometry (GC-MS) analysis. The method enabled effective extraction of VMSs from water within 20 min, achieving recoveries ranging from 70.4% to 117.0%. The method limit of quantitation (LOQ) was 0.004 ng/mL, with intra-day precision (RSD) ranging from 0.9% to 3.9%. Analysis of real water samples revealed contamination in all 16 selected water bodies, with five specific VMSs species detected at concentrations ranging from 0.01 to 0.52 ng/mL. In summary, the proposed method enabled rapid and simple determination of VMSs in water samples, demonstrating significant potential for environmental analysis applications. Graphical abstract The alternative text for this image may have been generated using AI.
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PubMed
高影响因子
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