Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Ruifeng Zhang,Jingjing Tang,Jing Yang,Chuanyun Yang,Qiuyan Niu,Gang Wen
Tetracycline (TC) is a widely used antibiotic, which poses a significant threat to aquatic environments. In this study, the backwashing sludge with different Fe/Mn mass ratio was obtained by adjusting the concentration of Fe 2 + and Mn 2+ in the influent water of filters. After dehydrating, drying and thermal treatment, the sludge was prepared as Fe-Mn binary catalysts to activate peroxymonosulfate (PMS) for removing TC from water. The removal performance, influence factors, and the degradation mechanism were investigated. The results indicated the prepared Fe-Mn sludge catalysts could effectively activate PMS to degrade TC and the activity was significantly influenced by the Fe/Mn ratio in the influent water. With Fe/Mn of 1:1 and 6:1, the sludge could be directly used as high activity catalysts; with Fe/Mn of 3:1, thermal treatment at 400 °C was required to enhance the activity. The fluidized-bed experiments showed that the Fe-Mn sludge catalysts had excellent activity stability and the ion leaching experiment indicated that the safe operational pH for the sludge catalysts should be above 5. The identification and quantification of reactive oxygen species proved that Mn was more beneficial to the generation of 1 O 2 , while Fe was more beneficial to the generation of SO 4 •─ and •OH, and TC was primarily degraded by 1 O 2 . Finally, based on the results of LC-MS characterization, the degradation pathway of TC was proposed, and the toxicity of the intermediates was assessed. The results provide new insights into the utilization of the Fe-Mn waste sludge as PMS catalysts for antibiotic removal.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Qi Xue,Tao Hang,Jianghu Liang,Chun-Chao Chen,Yunwen Wu,Huiqin Ling,Ming Li
Memristors have been seen as promising candidates for next-generation nonvolatile memory and neuromorphic computing . Solution-processed memristors can offer many advantages, such as low-cost fabrication, large-area uniformity, and high versatility. However, the high annealing temperature of the solution process and unsatisfactory performance are impeding the advancement of flexible memristors. In this work, the combustion method was proposed to fabricate the Mn-ZnO-based memristor without a high-temperature process on the flexible substrate. The device demonstrates stable bipolar resistive switching behavior with ultralow switching voltage (−0.6 V/0.71 V), high on/off ratio (˃ 2 × 10 3 ), multilevel storage capability, and uniform resistance distribution ( σ / µ = 18%/16%). The flexible device with a bend radius of 10 mm shows no obvious performance degeneration compared with the device in the flat state. Furthermore, tunable repetitively synaptic weight was achieved by the memristor. Synaptic plasticity functions, such as excitatory postsynaptic current, paired-pulse facilitation, and learning/forgetting behaviors, have been emulated. This work provides a simple and feasible strategy for fabricating the flexible high-performance memristor, with the expectation to facilitate the development of flexible electronics.
研究领域:
材料科学
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纳米科技
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电子工程
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神经形态计算
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柔性电子学
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固态物理
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功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhenkai Wang,Yifan Li,Yanfang Su,Sheng-Peng Sun,Xiaoning Wang,Zhangxiong Wu,Winston Duo Wu,Xiao Dong Chen
Catalytic membrane integrating membrane filtration and advanced oxidation in one single-step is promising in addressing emerging micropollutants issue in water, the challenges in catalytic activity and stability still limit their practical application. This study successfully anchored highly stable Fe–Mn bimetallic catalyst (FMBC) in Al 2 O 3 -based microfiltration and ultrafiltration ceramic membranes channel (named as FMBC@Al 2 O 3 -MF or UF) via a novel in situ fabrication strategy. Characterization results revealed that FMBC was anchored on the membrane channel wall of Al 2 O 3 -MF/UF, which enabled boosting Oxone activation to generate sulfate radical and hydroxyl radical at circumneutral pH (e.g., 7.0–9.0) and with great stability. Notably, FMBC@Al 2 O 3 -UF exhibited a remarkable activity and anti-interference capability in actual water matrices, which resulted in efficient degradation of emerging micropollutants such as carbamazepine, crotamiton, diethyltoluamide, gemfibrozil and ibuprofen in lake water and municipal wastewater treatment plant secondary effluent at environmentally relevant concentrations. Moreover, FMBC@Al 2 O 3 -MF/UF also displayed high cleaning efficiency toward natural organic matter (NOM) and effluent organic matter (EfOM) fouling via Oxone activation. Besides, the intermediates of carbamazepine degradation were identified, and most of them had decreased aquatic toxicity based on Ecological Structure Activity Relationship (ECOSAR) prediction. The high activity, stability and environmentally friendly property of the as-prepared FMBC@Al 2 O 3 -MF/UF make them promising application for advanced treatment of emerging micropollutants in water.
研究领域:
环境科学
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水处理技术
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产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
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IF 6.212
Run Yuan,Yihe Qin,Can He,Zichen Wang,Lu Bai,Hong Zhao,Zijian Jiang,Lingyao Meng,Xuwen He
It is important to develop a catalyst that has high catalytic activity and can improve the degradation efficiency of refractory organic pollutants in the catalytic ozonation process. In this study, Fe-Mn-Cu-Ce/Al 2 O 3 was synthesised via impregnation calcination for catalytic ozonation of bio-treated coking wastewater. The physical and chemical characteristics of the catalysts were analysed using X-ray diffraction (XRD), X-ray fluorescence spectrometry (XRF), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller nitrogen adsorption–desorption methods. The effects of catalyst dosage, pH, and reflux ratio on the degradation efficiency of wastewater were examined in laboratory-scale experiments. The chemical oxygen demand (COD) removal rate of bio-treated coking wastewater was estimated to be 52.76 % under optimal conditions. The experiments on the catalytic mechanism demonstrated that the surface hydroxyl formed by the Lewis acid sites on the surface of the catalyst can react with ozone as the active site forming the active oxygen (·OH, ·O 2 – , and 1 O 2 ), thereby efficiently degrading the organic pollutants in coking wastewater. Furthermore, a pilot-scale experiment on the catalytic ozonation of bio-treated coking wastewater was carried out using an Fe-Mn-Cu-Ce/Al 2 O 3 catalyst, while the effects of the initial pollutant concentration, ozone concentration, and gas flow on the COD removal rate were studied on a pilot scale. It was found that the COD removal rate of the wastewater was ∼ 60 % under optimal parameters. After the treatment, the wastewater steadily reached the coking wastewater discharge standard (COD < 80 mg/L), while the operating cost of catalytic ozonation reached ∼ 0.032$/m 3 , thereby paving the way toward economic engineering applications. The COD degradation kinetics in the bio-treated coking wastewater followed pseudo-second-order kinetics. Three-dimensional fluorescence and gas chromatography–mass spectrometry revealed that macromolecular organic pollutants in the bio-treated coking wastewater were greatly degraded. In summary, Fe-Mn-Cu-Ce/Al 2 O 3 exhibited good reusability, high catalytic activity, and low cost and has a wide application prospect in the treatment of coking wastewater.
研究领域:
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yaoyu Yan,Shuchen Sun,Jing Wei,A. Shubo,Faxin Xiao,Ganfeng Tu
Electrolytic manganese residue (EMR), a hazardous solid waste from electrolytic manganese metal (EMM) production, poses serious environmental risks due to its complex mineralogy and heavy metal mobility. However, it also holds potential as a secondary resource. We establish an end-to-end waste-to-materials flowsheet—sulfuric-acid curing → water leaching → impurity removal → one-step conversion—that selectively recovers Mn from EMR and upgrades it to phase-pure, high-value Mn₃O₄ nanomaterials. The effects of curing temperature and acid dosage on the leaching behaviors of Mn, Fe, Al, and Si were systematically investigated. At 240 °C and an acid dosage of 2.5 times the stoichiometric requirement, Mn leaching efficiency reached 95.35 %, while Si leaching remained below 50 % due to silicate encapsulation and gelation. Kinetic modeling using the shrinking core model revealed that Mn dissolution was primarily controlled by product-layer diffusion, with an apparent activation energy of 14–18 kJ·mol −1 . FTIR, XRD, SEM–EDS, and BET analyses showed that acid curing disrupted the dense silicate matrix and increased surface area from 9.4 to 55.6 m 2 ·g −1 . Mn 2+ in the purified leachate was directly precipitated and oxidized using an NH₃·H₂O–H₂O₂–EDTA system, producing uniformly sized Mn₃O₄ nanoparticles. Rather than a stand-alone synthesis, the impurity-tolerant process with defined operating windows is the core contribution, with the Mn₃O₄ product validating this waste-to-value pathway. This integrated route offers a scalable framework for hazardous-waste valorization while clarifying sulfuric-acid-curing transformation and leaching kinetics, advancing sustainable metal recovery.
研究领域:
环境科学与技术
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湿法冶金
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废物资源化
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材料科学
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浸出动力学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
This study successfully synthesized a series of Mn(OH)F hollow structures doped with rare earth elements (Sm, Nd, Ce, and Tb) using a hydrothermal method . A comprehensive analysis was conducted on the influence of these dopant elements on the morphology and gas-sensitive properties of Mn(OH)F. The gas-sensing performance of Mn(OH)F nanomaterials doped with Sm, Nd, Ce, and Tb was extensively investigated at 150℃ for methyl acetate , ethyl acetate , propyl acetate , and butyl acetate . The results demonstrated good gas-sensing capabilities, with responses reaching 2.0, 2.0, 2.0, and 2.5, respectively. Compared to undoped Mn(OH)F nanomaterials , the operating temperature of these sensors was reduced by about 100℃, and the response values were nearly tripled. Exceptional selectivity and stability were also observed. In addition, an in-depth exploration was conducted into the underlying mechanisms behind the enhanced gas response due to rare earth element doping . This study provides strong theoretical support for the development of efficient acetate ester gas sensors, demonstrating broad prospects for their widespread application in the industrial field.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
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IF 4.6
Huakuo Zhou,Peng Li,Yifei Li,Yi Ke,Xia Zhang,Jun Meng
In recent years, most of the studies on nanozymes have focused on improving their catalytic activity and direct synthesis, but this task is still very complex. Bimetallic oxides are particularly popular due to their mixed valence and synergistic effects between different metal ions. In this study, Fe-Mn bimetallic oxide nano-cubes were prepared by fast and effective solvothermal synthesis, and nano-flower-like structures were grown on the surface of Fe-Mn oxide nanocubes via controlled etching. The synthesized Fe-Mn bimetallic oxide nano-flowers (FMBO NFs) have great oxidase-like activity. On this basis, a simple, economical and accurate colorimetric sensor was established by combining 3,3',5,5'-tetramethylbenzidine (TMB). Exposure to L-cysteine (L-Cys) inhibited the catalytic activity of FMBO NFs. As the concentration of L-Cys increased, the absorbance at 652 nm decreased, with a good linear relationship in the range of 0.01-1000 μM, with a limit of detection (LOD) of 3.99 × 10 -11 M, and the detection of L-Cys in the actual sample egg yolk was successfully achieved. This study provides theoretical support for the effective design of bimetallic oxide nanozyme activity, and can guide the development of an accurate detection system for the analysis of L-Cys in food.
研究领域:
纳米材料科学
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生物传感
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食品分析
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
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IF 13
Lili Xu,Jianli Nan,Songxue Han,Zhixuan Yu,Shuangli Wu,Youxing Fang,Shaojun Dong
In nature, active Mn 3+ –ligand complexes produced by laccase catalyzed oxidation can act as the low-molecular mass, diffusible redox mediators to oxidize the phenolic substrates overcoming the limitations of natural enzymes. Learning from the metal–ligand coordination of natural functional units, high-valence Mn metal–organic framework (Mn MOF) is constructed to simulate the catalysis in natural mediator system. Benefiting from the characteristics of nanoscale size, rich metal coordination unsaturated sites, and mixed valence state dominated by Mn(III), Nano Mn(III)-TP exhibits superior laccase-mimicking activity, whose V max (maximal reaction rate) is much higher than that of natural laccase. Referring to natural systems, relevant free radical experiments prove that the material induces the production of active oxygen species with the assistance of carboxylic acid, and active oxygen species further oxidize phenolic substrates. Based on its robust performances, the primary oxidative degradation of an emerging pollutant triclosan (TCS) is creatively applied, an important antiasthmatic medicine terbutaline sulfate (TBT) detection, and the synthesis of non-toxic and black near-natural dyes for dyeing. By simulating the essential mediators of natural enzymatic catalysis, an Mn MOF-based material that demonstrates multiple novel applications is successfully developed, which introduces a new reliable strategy for achieving versatile nature-mimicking catalysis.
研究领域:
催化
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材料科学
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环境化学
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分析化学
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有机合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yanmin Qin,Shihao Zhao,Haoda Wu,Chenxu Sun,Jing Xu,Ming Yang,Ruidan Shi,Haifeng Bao
Transition metal sulfides such as FeS are promising anode materials for lithium-ion batteries (LIBs) due to their high theoretical capacity and natural abundance. However, their practical application is hindered by poor electronic conductivity, severe volume expansion, and irreversible structural degradation. To overcome these limitations, we report a dual-regulation strategy that integrates Mn doping and nitrogen-doped carbon (NC) coating to synergistically enhance both the lattice structure and interface characteristics of FeS. The resulting Mn-FeS/NC composite exhibits anisotropic lattice expansion, with the (102) crystal plane spacing increasing from 0.209 nm to 0.263 nm. Density functional theory (DFT) calculations reveal that Mn doping significantly lowers the Li + insertion/extraction energy barrier. Meanwhile, the NC coating forms a highly conductive and flexible network that buffers volume changes and enhances interfacial stability. Benefiting from this multiscale synergy, Mn-FeS/NC delivers a high initial discharge capacity of 1660.4 mAh g −1 at 0.1 A g −1 with an initial Coulombic efficiency of 75.8 %, and maintains 728.9 mAh g −1 after 600 cycles at 1.0 A g −1 . Even at 5.0 A g −1 , a capacity of 413.6 mAh g −1 is retained. Kinetic analysis confirms a dominant pseudocapacitive behaviour, contributing up to 72.3 % at high scan rates. This study not only provides quantitative insight into the synergistic effect of Mn doping and NC encapsulation, but also offers a viable design strategy for high-performance metal sulfide anodes in next-generation LIBs.
研究领域:
储能
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材料科学
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电化学
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纳米技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Thao Pham Manh,Dinh Son Le,Ky Nguyen Van,Lan Ngo Thi,Tien Phat Doan,Dinh Thao Vu,Tuan Nguyen Van,Thu Hoa Nguyen Thi,Nguyen Vo Anh Duy,Minh Triet Dang,Nguyen To Van
s The present study demonstrates a successful synthesis of manganese-doped nickel cobalt sulfides (Mn-NiCo 2 S 4 ), which deliver marked improvements in electrochemical properties compared to pristine NiCo 2 S 4 . Comprehensive structural, morphological, compositional, surface, and electronic characterizations provide clear insights into the enhanced performance. Specifically, we identify three primary factors contributing to the superior electrochemical behaviors of Mn-NiCo 2 S 4 : ( i ) the appearance of hollow nanorods, which facilitates electrolyte access and improves ionic transport; ( ii ) the synergistic effects arising from the Faradaic reactions, which play a crucial role in boosting the electrochemical performance of Mn-NiCo 2 S 4 compared to the unmodified NiCo 2 S 4 ; and ( iii ) the enhances electronic conductivity from increased electron density and effective charge redistribution due to Mn doping confirmed by density functional theory simulations and experimental observations, leading to reduced internal resistance and improved electrochemical kinetics. Remarkably, Mn-NiCo 2 S 4 achieves an exceptional specific capacity of 470 C g -1 at a current density of 1 A g -1 . Additionally, the Mn-NiCo 2 S 4 //AC asymmetric supercapacitor delivers impressive energy densities ranging from 37.09 to 84.85 Wh kg -1 , corresponding to power densities decreasing from 7.09 to 0.79 kW kg -1 ; maintaining 50.52% capacity retention after 10,000 cycles at 2 mA cm -2 . These results underscore the potential of Mn-NiCo 2 S 4 and related doped materials as next-generation electrodes for advanced, high-performance supercapacitors, paving the way for significant advancements in energy storage technology.
研究领域:
材料科学
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电化学
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纳米技术
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储能
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 16
·3388
·
IF 4.6
Shefeng Li,Pengyi Zhao,Ziyang Liu,Chang Wang,Linling Wang,Siyu Ding
Microwave-assisted processing has shown tremendous promise in accelerating chemical reactions and reducing energy consumption through targeted dielectric heating. This study develops MOF-derived Mn-Co and Ce-Co oxide catalysts for energy-efficient benzene oxidation via microwave catalysis. The MnCo spinel oxides (particularly MnCo11-400) exhibit superior microwave absorption and catalytic activity due to enhanced oxygen mobility and tailored dielectric properties. Microwave irradiation enables rapid benzene mineralization over the MnCo11-400 catalyst, achieving 78% conversion at 30 W and complete conversion at 50 W, demonstrating exceptional energy efficiency at low power inputs. Microwaves significantly lower the reaction temperature compared to conventional thermal catalysis (ΔT = 100–250 °C). Stability tests confirm robustness over repeated power cycling (80% conversion retained after 3 × 1 h on/off cycles). Furthermore, an adsorption–microwave oxidation synergistic strategy is demonstrated: pre-adsorbed low-concentration benzene (1.15 mmol) at ambient temperature undergoes complete mineralization within 20 min under 30 W microwave irradiation. The intermittent microwave operation achieves equivalent benzene removal to continuous thermal processing while significantly reducing energy demand. This work establishes MOF-derived spinel oxides as high-performance microwave catalysts for low-temperature VOC abatement.
研究领域:
催化
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环境化学
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材料科学
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微波化学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yuxi Zhang,Yamin Deng,Jiangkai Xue,Yihan Cheng,Yulun Nie,Kunfu Pi,Yao Du,Xianjun Xie,Jianbo Shi,Yanxin Wang
The environmental fate of arsenic (As) relies substantially on its speciation, which occurs frequently coupled to the redox transformation of manganese. While trivalent manganese (Mn(III)), which is known for its high reactivity, is believed to play a role in As mobilization by iron (oxyhydr)oxides in dynamic aquifers, the exact roles and underlying mechanisms are still poorly understood. Using increasingly complex batch experiments that mimick As-affected aquifer conditions in combination with time-resolved characterization, we demonstrate that Mn(III)-NOM complexes play a crucial role in the manganese-mediated immobilization of As(III) by ferrihydrite and goethite . Under anaerobic condition , Mn(III)-fulvic acid (FA) rapidly oxidized 31.8% of aqueous As(III) and bound both As(III) and As(V). Furthermore, Mn(III)-FA exerted significantly different effects on the adsorption of As by ferrihydrite and goethite. Mn(III)-FA increased the adsorption of As by 6–16% due to the higher affinity of oxidation-produced As(V) for ferrihydrite under circumneutral conditions. In contrast, As adsorption by crystalline goethite was eventually inhibited due to the competitive effect of Mn(III)-FA. To summarize, our results reveal that Mn(III)-NOM complexes play dual roles in As retention by iron oxides , depending on the their crystallization. This highlights the importance of Mn(III) for the fate of As particularly in redox fluctuating groundwater environments.
研究领域:
环境科学
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地球化学
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水文地质学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）