INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Huimei Shan,Huinan Mo,Yunquan Liu,Chunya Zeng,Sanxi Peng,Hongbin Zhan
Graphene oxide chitosan composite (GOCS) is recognized as an environmentally friendly composite adsorbent because of its stability and abundant functional groups to adsorb heavy metals, and Fe-Mn binary oxides (FMBO) have attracted increasing interest due to their high removal capacity of As(III). However, GOCS is often inefficient for heavy metal adsorption and FMBO suffers poor regeneration for As(III) removal. In this study, we have proposed a method of dopping FMBO into GOCS to obtain a recyclable granular adsorbent (Fe/Mn GOCS) for achieving As(III) removal from aqueous solutions. Characterization of BET, SEM-EDS, XRD , FTIR , and XPS are carried out to confirm the formation of Fe/Mn GOCS and As(III) removal mechanism. Batch experiments are conducted to investigate the effects of operational factors (pH, dosage, coexisting ions, etc.), as well as kinetic, isothermal, and thermodynamic processes. Results show that the removal efficiency ( R e ) of As(III) by Fe/Mn GOCS is about 96 %, which is much higher than those of FeGOCS (66 %), MnGOCS (42 %), and GOCS (8 %), and it increases slightly with the increasing molar ratio of Mn and Fe. This is because amorphous Fe (hydro)oxides (mainly in the form of ferrihydrite) complexation with As(III) is the major mechanism to remove As(III) from aqueous solutions, and it is accompanied by As(III) oxidation mediated by Mn oxides and the complexation of As(III) with oxygen-containing functional groups of GOCS. Charge interaction plays a weaker role in As(III) adsorption, therefore R e is persistently high over a wide range of pH values of 3–10. But the coexisting PO 4 3− can greatly decrease R e by 24.11 %. As(III) adsorption on Fe/Mn GOCS is endothermic and its kinetic process is controlled by pseudo-second-order with a determination coefficient of 0.95. Fitted by the Langmuir isotherm, the maximum adsorption capacity is 108.89 mg/g at 25 °C. After four times regeneration, there is only a slight decrease of <10 % for the R e value. Column adsorption experiments show that Fe/Mn GOCS can effectively reduce As(III) concentration from 10 mg/L to <10 μg/L. This study provides new insights into binary polymer composite modified by binary metal oxides to efficiently remove heavy metals from aquatic environments.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
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
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
·
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 FOOD COMPOSITION AND ANALYSIS
·
2025
·
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Baicheng Yuan,Xinyi Huang,Shaojinlin Yang,Yi Yang,Zhihong Lin,Raphael Semiat,J. Paul Chen
Heavy metal contamination has become one of the greatest global environmental problems. In this study, a magnetic calcium-alginate hydrogel-sphere encapsulated with Fe–Mn–Zr ternary-metal composite (MCHETC) was prepared through a combined co-precipitation and extrusion approach and used for the adsorption of heavy metals in aqueous solutions. The active sites were dispersed in the MCHETC, which can be separated by the magnetic force for the ease in operation. Above 80% of ultimate adsorption was completed at a contact time of 5 h. The copper uptake history was well described by the intraparticle surface diffusion model, suggesting a multi-step process for the adsorption. The optimum pH for adsorption was 4; the maximum adsorption capacity was 103.1 mg-Cu/g. The adsorption capability well remained after the 5 adsorption–desorption cycles and the copper could be recovered. Furthermore, the adsorbent performed well in the nature water spiked with copper ions. The mechanism studies illustrated that the adsorption was mainly controlled by the ion-exchange reaction. This study demonstrated that the MCHETC adsorption technology may be used for heavy metal removal and recovery with higher efficacy.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2014
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IF 2.063
Jianrong Li,Jinsheng Chen,Yanke Yu,Chi He
The Fe–Mn–Ce/CP catalyst prepared by the incipient-wetness impregnation method was investigated for elemental mercury (Hg 0 ) removal in simulated coal-fired flue gas . The incorporation of Fe could remarkably enhance the SO 2 -resistance of Fe–Mn–Ce/CP catalyst at low temperature, and the existence of water vapor had negative impact on Hg 0 removal efficiency. More than 95% of Hg 0 could be removed at 100 °C under the conditions of 60 ppm HCl, 3% O 2 ( v/v ), 5% H 2 O ( v/v ) and 400 ppm SO 2 . Hg-TPD results indicated that Hg 0 adsorption amount decreased after the addition of H 2 O or SO 2 . The XPS results revealed that the incorporation of Fe could enhance the contents of high valence Mn x + (i.e., Mn 3+ /Mn 4+ ) and Ce 3+ species in the composite catalysts, which are favorable for the oxidation process of elemental mercury. The surface characteristics were not the primary factor determining the catalytic activity . Overall, the catalytic performance of the Fe–Mn–Ce/CP catalyst was closely related to the Fe 3+ state, high ratios of (Mn 4+ + Mn 3+ )/Mn 2+ and high content of not fully coordinated cerium species.
研究领域:
环境催化
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大气污染防治
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能源化学工程
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材料科学与工程
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表面化学
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烟气净化技术
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Zhijie Jing,Peng Xu,Ling Wang,Rou Liang,Chi Pang
In this work, ultrasonic-assisted laser cladding technology was employed to fabricate shape memory alloy (SMA) coatings composed of Fe-Mn-Si-Cr-Ni on the surface of 304 stainless steel. Both experimental and simulated results unequivocally demonstrate a substantial improvement in both microhardness and wear resistance of the metal surface. Subsequently, a superhydrophobic coating with an “armor-like” structure was comprehensively prepared by integrating femtosecond laser (FSL) and nano SiO 2 spray-coating techniques. The creation of this microstructure on the coating surface efficiently facilitated the high-efficiency embedding of nano SiO 2 particles. Notably, the modified SMA coating exhibited stable superhydrophobic properties and exceptional corrosion resistance. This research not only provides novel approaches and methods for the preparation and modification of Fe-based memory alloy coatings but also highlights potential applications in the corrosion-resistant field. The work offers valuable insights for researchers in the field of materials science, emphasizing the synergistic effects of ultrasound-assisted laser cladding technology, femtosecond laser, and nano SiO 2 spraying techniques. It provides robust support for the development of new functional coatings.
研究领域:
材料科学
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表面工程
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腐蚀科学
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激光技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Danlei Qiao,Yixuan Zhang,Chang Su,Guoqiang Liu,Qingxiang Wang,Lei Wen
Al-doped Fe-Mn and Ni-Mn based materials with P2-type layered structure has been synthesized and tested as a positive electrode material for rechargeable sodium batteries. The modification mechanisms of Al doping in Fe-Mn and Ni-Mn based materials have been discussed. The synthesized Al-doped Ni-Mn based material Na 0.67 Mn 0.8 Ni 0.16 Al 0.04 O 2 delivers a reversible capacity of 135.1 mAh g −1 , which corresponds to 92.1% of the initial capacity with excellent cyclability for 200 cycles. What’s more, it can still remain a capacity of 96.2 mAh g −1 at a current density of 2000 mA g −1 . When the voltage range increase to 1.5 – 4.3 V, its initial discharge capacity can reach 190.3 mAh g −1 .
研究领域:
材料科学
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电化学
·
能量存储
✓ 已验证
DOI
高影响因子
NMR IN BIOMEDICINE
·
2025
·Vol. 38
·期 9
·e70116
·
IF 2.7
Fei-Xiang Hu,Deng-Deng Liu,Xiao-Wen Ma,Pu-Yeh Wu,Wei-Jun Peng,Dan Wang,Tong Tong
This study aims to design and evaluate a two-dimensional Ti 3 C 2 -MXene contrast agent, codoped with iron and manganese, with the aim of achieving T 1 /T 2 dual-mode magnetic resonance imaging contrast, and to investigate its effect on Chemical Exchange Saturation Transfer (CEST) contrast agents. Single-layer Ti 3 C 2 was synthesized via the HCL/LiF etching technique, with the flake size subsequently tailored and the hydroxylated surface modified through a hydrothermal process. Fe 3 O 4 nanoparticles and MnO 2 nanosheets were integrated onto the two-dimensional Ti 3 C 2 -MXene surface using an in situ doping approach, and the final modification was achieved with carboxymethyl chitosan. Various characterization techniques were employed to assess the physical and chemical properties of the probe, which were then combined with a CEST contrast agent to investigate the mechanisms of multimodal magnetic resonance imaging and in vitro photothermal effects. Upon integrating the multi-modal molecular probe with Ioversol for imaging purposes, at a magnetic field strength of B 1 = 1.25 μT and with a molecular probe concentration of 0.5 mg/mL, the CEST signal from Ioversol is almost entirely suppressed. This allows for the successful identification of a distinct concentration range where both contrast agents can coexist. In vitro photothermal studies on MXene codoped with iron and manganese have shown that the composite molecular probe exhibits excellent photothermal efficiency. The method combining complex nanoprobes with CEST contrast agents successfully achieved simultaneous imaging of both contrast agents. In vitro MRI experiments successfully obtained distinguishable concentration ranges for both, with changes in CEST signals reflecting the concentration variations of the complex molecular probes, which also exhibit good photothermal therapy (PTT) capabilities.
研究领域:
纳米材料
·
磁共振成像
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对比剂
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多模态成像
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光热治疗
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2022
·
IF 9.794
Yixuan Zhang,Guoqiang Liu,Chang Su,Guangyin Liu,Hongda Sun,Danlei Qiao,Lei Wen
This work focuses on the improvement on the electrochemical performances of Fe–Mn based oxides as cathode for sodium ion batteries by doping Cu and F elements. The synthesized doped-compounds exhibit extremely excellent electrochemical performance. For instance, it's initial discharge capacity can reach 195.6 mAh g −1 at a current density of 10 mA g −1 . Meanwhile, after 200 cycles at 200 mA g −1 , it still remains a capacity of 124.1 mAh g −1 , 87.8% of the initial capacity of 141.3 mAh g −1 . More significantly, it can deliver a high capacity of 106.4 mAh g −1 at a high current density of 1000 mA g −1 . It is found that F/Cu co-substitution obviously improve the discharge capacity and cycle stability of Fe–Mn based oxide especially at higher current densities. Doping Cu and F elements has influence on the structure and morphology of the material, which results in the improvement of charge-discharge characteristics.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Kunlun Yang,Jiasheng Zhou,Zimo Lou,Xurui Zhou,Yuanli Liu,Yizhou Li,Shams Ali Baig,Xinhua Xu
Fe-Mn binary oxides (FMBO) with different Fe/Mn molar ratios were synthesized to investigate the influence of the changed iron oxides forms and the manganese oxide on the removal efficacy of Sb(V) from water under neutral pH. The characterization tests by electron microscopy and X-ray diffraction spectroscopy showed that FMBO gradually changed from granular to aciculiform or fibrous structure and their crystalline degree increased with the decreasing Mn content. The ferric oxides in FMBO transformed from 2-L ferrihydrite-like substance with amorphous state to goethite or lepidocrocite with high crystalline as the amount of added Mn reduced during the preparation. The Sb(V) adsorption rates and capacities of FMBO both decreased and the influence of pH on the Sb(V) removal became greater with the decreasing Mn oxide content. All the results indicated that the addition of Mn could greatly improve the Sb(V) removal performance of FMBO through promoting the formation and preventing the transformation of amorphous ferric oxide in FMBO during the preparation, whose Sb(V) adsorption ability was confirmed to be stronger than that of goethite or lepidocrocite. Further exploration indicated the complexation reaction between Sb(V) and amorphous ferric oxide played a key role in Sb(V) adsorption by FMBO. Meanwhile, FMBO with a Fe/Mn molar ratio of 3:1 (FMBO 3 ) exhibited excellent regeneration performance and the amorphous iron oxide in FMBO 3 gradually transformed into crystalline iron oxide during the consecutive recycling.
研究领域:
环境科学
·
水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Qingtao Zeng,Bingjie Zhang,Shengzhi Jiao,Mingyue Gao,Ruyu Li,Haiyan Xiao,Longgang Wang
The emergence of nanozymes based on metal-organic frameworks has successfully addressed some limitations of natural enzymes. ZIF-8 is a framework with high pore rate consisting of Zn 2+ and 2-methylimidazole, but its catalytic activity is limited. In this study, a new metal organic framework named ZIF-8 (FM) was prepared by doping iron and manganese in ZIF-8, which exhibited enhanced catalytic performance. ZIF-8(FM) showed the peroxidase-like (POD-like) activity by oxidizing chromogenic substrates and was capable of colorimetric detection of dopamine in actual samples. In addition, in order to improve the photothermal conversion efficiency, ZIF-8(FM) was wrapped with polydopamine (PDA) to prepare ZIF-8(FM)@PDA. The antibacterial experiments of Escherichia coli and Staphylococcus aureus showed that ZIF-8(FM)@PDA had strong antibacterial effect. Nanomaterials based on ZIF-8(FM) have great potential in dopamine detection and effective photothermal antibacterial treatment.
研究领域:
纳米技术
·
生物分析化学
·
材料科学
·
酶模拟
·
抗菌治疗
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）