SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Iwei Wang,Hailiang Nie,Yongliang Yan,Manyi Cai,Hui Zhou,Yongqing Xu,Yi Xing,Hongzhi Ma
Reconstructing dual functional materials (DFMs) from industrial waste such as steel slag offers a sustainable approach to mitigate environmental pollution while valorizing hazardous byproducts. Although the steel slag is rich in calcium and iron, its direct use is hindered by the formation of inactive solid solutions (e.g., Ca 2 Fe 2 O 5 , Ca 2 SiO 4 ), limiting CO 2 capture and conversion performance. In this study, we reconstruct steel slag into a high-performance DFM composed of CaO (adsorptive phase) and FeOx (catalytic phase) for integrated CO 2 capture and utilization (ICCU). The optimized DFM achieves a CO 2 uptake of 9.15 mmol g −1 , a CO yield of 7.80 mmol g −1 , 87 % CO 2 conversion, and 100 % CO selectivity at 650 °C, substantially outperforming the raw slag. Moreover, the DFM maintains outstanding cyclic stability over 10 cycles, with CO 2 uptake ranging from 8.25 to 10.38 mmol g −1 and CO yield from 6.90 to 8.25 mmol g −1 . In-situ XRD and DRIFTS analyses reveal a dual Fe-phase looping mechanism (Fe/FeO and Fe/Ca 2 Fe 2 O 5 ), and a formate-mediated hydrogenation pathway during in-situ CO 2 conversion. This work highlights the untapped potential of industrial waste for developing efficient, sustainable materials for integrated CO 2 capture and utilization.
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高影响因子
IONICS
·
2025
·
IF 2.6
Liu Dongni,Guo Lichi,Duan Ruochen,Zhang Shengwei,Li Mingying
Microbial fuel cells (MFCs) represent an emerging energy technology that generates electricity through microbial-organic interactions, with the anode serving as a critical component for wastewater-to-electron conversion. This study focuses on developing porous iron-nickel (Fe–Ni) alloys as potential anodes for MFCs, employing electrodeposition to fabricate these anodes with systematically varied Fe/Ni ratios. Through intrinsic electrochemical performance screening, the work aims to achieve composition optimization for high-performance microbial fuel cell anodes. Multi-dimensional analysis integrating linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization was conducted to establish structure–activity relationships and synergistic catalytic mechanisms of the alloys. Key findings reveal that compositional optimization profoundly impacts the performance of these potential anodes: the Fe 7 Ni 3 alloy exhibited significantly superior electrochemical activity compared to pure Ni, characterized by dramatically enhanced peak current density, and improved charge storage capacity. Furthermore, Fe 7 Ni 3 demonstrated minimal charge transfer resistance and excellent reaction kinetics. These results validate that bulk composition engineering of porous Fe 7 Ni 3 offers a highly promising strategy for developing potential anode materials for high-performance MFCs, effectively addressing the stability-activity trade-off inherent in conventional surface-modified anodes. This work provides a composition-driven design paradigm for bioelectrochemical systems, paving the way for future scale-up studies focusing on long-term stability and integration into wastewater treatment modules. Graphical abstract
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ACS Nano
·
2025
·
IF 16
Huangxu Li,Xu Wang,Fangyan Liu,Yulun Wu,Jingqiang Zheng,Zezhou Lin,Tiancheng Liu,Jin Xiao,Jianzhong Jiang,Haitao Huang
Fe- and Mn-based polyanionic electrode materials are important cathode materials for sodium-ion batteries (SIBs) due to their low cost. However, due to the low redox potential of Fe2+/3+ and the notorious Jahn–Teller (JT) effect, severe lattice distortion that is associated with Mn2+/3+ redox hinders Fe and Mn redox activation, leading to inadequate cycling stability and rate performance. Here, we discover both high Mn2+/3+ and Fe2+/3+ redox activation in a Na4Mn1.5Fe1.5(PO4)2(P2O7) (NMFPP) material. It is revealed that the substitution of Mn reduces the Fe–O bond covalency, elevating the Fe2+/3+ redox potential to improve the energy density. Furthermore, the JT effect is accompanied by Mn eg orbital splitting, with the dx2–y2 and dz2 orbitals being positioned at the top of the valence band and the bottom of the conduction band, respectively, which primary contributes to reduce the material band gap and facilitate electron transfer. Experimental and theoretical studies discover an anisotropic lattice distortion behavior, which enlarges Na+ diffusion pathways, lowering diffusion energy barriers and enabling rapid Na+ migration. As a consequence, high Fe–Mn redox activity is achieved and the NMFPP demonstrates enhanced energy density, rate performance, and exceptional cycling stability for sodium storage. These findings prove that the JT effect and lattice distortion could synergistically make positive impacts on transition-metal redox activation, which is informative for the design of high-performance electrode materials.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
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IF 3.442
Deqiang Feng,Jie He,Lingcheng Zheng,Wenjun Jiang,Ce Zhang,Long Li,Jian Song,Wei Yao
Developing novel catalysts and catalysis processes are highly attractive in environmental protection and energy utilization. Photocatalysis-Fenton combinational process is an environmentally friendly technology and has broad application prospects. In this work, thin Fe@α-Fe 2 O 3 nanosheets with thickness of 2–5 nm were designed by oxidation of Fe metal nanostructure synthesized using a modified solution reaction method. The nanosheet structure with thin thickness has short diffusion distance for the photogenerated carriers and prolongs the carriers' life. Simultaneously, the presence of Fe can reduce the resistance of system and further promote the transport and transfer of photogenerated carriers from the bulk to the surface, causing less carrier recombination and better photocatalytic performance. What's more, the Fe@α-Fe 2 O 3 composite can induce the Fenton-like reaction to generate active • OH radicals, which significantly improve the degradation rate . The synergistic effect of photocatalysis and Fenton processes makes the system show an enhanced photodegradation performance: 96.5% of RhB is degraded after 60 min visible light irradiation , especially, 84.3% of RhB is degraded within the first 10 min, which are much higher than that of the pure α-Fe 2 O 3 sample. This work demonstrates that the conjunction of photocatalysis and Fenton processes based on the Fe@α-Fe 2 O 3 nanosheets provides a potential application for pollutants degradation.
研究领域:
环境化学
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材料科学
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催化化学
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纳米科技
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物理化学
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123857
·
IF 7.5
Weitian Yang,Ning Gan,Jiahao Yu,Siyi Zhao,Hao Yi,Ting Guo,Zuoping Zhao
The efficient removal of nanoplastics from aquatic environments remained a critical environmental challenge. Herein, MIL-88A(Fe) was employed as the precursor to fabricate a series of magnetic iron oxide/carbon composites (M-T, M = MIL-88A(Fe), T = 300–800 °C) via controlled pyrolysis. Among them, the optimized M-600 preserved a spindle–like morphology, with superparamagnetic Fe 3 O 4 nanoparticles uniformly embedded in the carbon matrix. M-600 exhibited exceptional adsorption performance with excellent magnetic separability, achieving 97.46% removal efficiency for polystyrene nanoplastics (PSNPs) (pH=7, 0.3 g·L −1 , 25 °C). It worked within the pH range of 2.0–7.0. The efficiency was 63.97% after five cycles, and the maximum adsorption capacity was 69.97 mg·g −1 . The adsorption kinetics followed the pseudo-first-order model, while the adsorption isotherm was well fitted by the Sips model. Its favorable wettability facilitates interfacial contact, and the efficient capture of PSNPs was dominated by electrostatic attraction and further strengthened by π–π stacking interactions. Overall, this study provides a technically reliable and promising strategy for nanoplastic removal.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122734
·
IF 7.5
Zhenda Liang,Jiangpeng Li,Jian Liu,Yijun Pang,Li Zhou,Bing Yan
Cephalosporins are widely used β -lactam antibiotics frequently detected in aquatic environments, posing risks to ecosystem health and contribute to the dissemination of antibiotic resistance. Manganese dioxide (MnO 2 ) has attracted considerable attention as a low-cost oxidant for cephalosporin degradation. However, its performance is severely limited under neutral and alkaline conditions. Here, we demonstrate that defect-rich ε -MnO 2 achieved over 60% removal of eight representative cephalosporins at pH 7.0 through the combined contributions of Mn redox reactions and oxygen-vacancy-mediated reactive oxygen species (ROS) pathways. Fe doping further increased surface oxygen-vacancy density and catalytic activity, producing Fe- ε -MnO 2 with boosted degradation performance across a broad pH range (3.0–11.0). Using ceftriaxone as a model compound, mechanistic investigations revealed that singlet oxygen ( 1 O 2 ) dominated under neutral conditions, whereas hydroxyl radicals (•OH) became increasingly important under alkaline conditions, compensating for reduced lattice-mediated oxidation and partially suppressed 1 O 2 production. To facilitate catalyst recovery and practical application, Fe- ε -MnO 2 was immobilized in situ onto a commercial melamine sponge, forming a stable composite with effective performance in diverse real water matrices. Toxicity assays confirmed substantial detoxification of ceftriaxone after treatment. Overall, this study demonstrates that defect-rich MnO 2 combined with Fe doping provides an effective strategy for enhancing antibiotic degradation and expanding catalytic activity across a wide pH range.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Fen Liu,Wei Xiang,Chen Wang,Yongchun Zhao,Tao Zhou,Mingjie Huang,Xiaohui Wu
High-concentration glyphosate (Gly) wastewater presents a formidable remediation challenge due to its recalcitrance and the inherent risk of generating toxic intermediates like aminomethylphosphonic acid (AMPA). Herein, we report a facile “waste-treats-waste” strategy utilizing a self-accelerated Fe(II)/O 2 system that operates efficiently under neutral pH, effectively circumventing the acidic constraints of traditional Fenton processes. This system achieved a 57% Gly removal efficiency (initial concentration 0.5 g/L) within 60 min, with a kinetic rate constant ( k obs = 0.029 min −1 ) significantly outperforming conventional oxidation technologies. Mechanistic investigations reveal that Gly acts as a suicide ligand, forming an inner-sphere Fe(II)-Gly complex that lowers the Gibbs free energy barrier, thereby rendering O 2 activation thermodynamically favorable. The degradation proceeds via a dual-pathway mechanism, synergizing hydroxyl radical (•OH) attack (∼40%) with a dominant intramolecular ligand-to-metal charge transfer (LMCT) process (∼60%). Crucially, density functional theory (DFT) calculations elucidate that Fe(III) coordination induces a regioselective weakening of the C–N bond adjacent to the phosphonate group. This steric and electronic modulation steers the reaction pathway toward the preferential formation of benign glycine, successfully suppressing the generation of highly toxic AMPA. Bioassays using Tetrahymena thermophila confirmed that this glycine-selective pathway optimization significantly mitigates the acute toxicity of the effluent, validating the system as a sustainable and eco-safe solution for herbicide wastewater treatment.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Huiwen Tang,Jinquan Wan,Yan Wang
This study proposes a strategy for constructing catalysts based on carbon nanotube (CNT)-regulated pore structures. By coating CNTs onto the outer surface of a metal-organic framework, a series of composite catalysts (PCC-x) were successfully prepared. The introduction of CNTs not only optimized the pore environment of the catalyst, but also established continuous electron-transfer pathways, thereby promoting interfacial charge transfer and peroxymonosulfate (PMS) activation. Under the conditions of 0.6 g/L catalyst, 2 mmol/L PMS, and 10 mg/L 2,4,6-trichlorophenol (2,4,6-TCP), PCC-5 exhibited the best catalytic performance, achieving a removal efficiency of 95.1% for 2,4,6-TCP. The corresponding apparent rate constant is 1.75 times higher than that of the non-composite catalyst (NPC). Electrochemical impedance spectroscopy showed that the charge-transfer resistance of PCC-5 was 418.8 Ω, which was 17.2% lower than that of NPC (506.0 Ω), confirming that CNT incorporation effectively promoted interfacial electron transfer and thereby enhanced the catalytic performance. This study provides a new strategy for designing CNT-modified catalysts for the efficient and stable removal of phenolic pollutants.
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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.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yuan-li Wang,Tong-hui Yang,Song Yue,Hang-bo Zheng,Xiao-pan Liu,Peng-zhao Gao,Hang Qin,Han-ning Xiao
Composition optimization, structural design, and introduction of external magnetic fields into the catalytic process can remarkably improve the oxygen evolution reaction (OER) performance of a catalyst. NiFe2O4@(Ni, Fe)S/P materials with a heterogeneous core–shell structure were prepared by the sulfide/phosphorus method based on spinel-structured NiFe2O4 nanomicrospheres. After the sulfide/phosphorus treatment, not only the intrinsic activity of the material and the active surface area were increased but also the charge transfer resistance was reduced due to the internal electric field. The overpotential of NiFe2O4@(Ni, Fe)P at 10 mA cm–2 (iR correction), Tafel slope, and charge transfer resistance were 261 mV, 42 mV dec–1, and 3.163 Ω, respectively. With an alternating magnetic field, the overpotential of NiFe2O4@(Ni, Fe)P at 10 mA cm–2 (without iR correction) declined by 45.5% from 323 mV (0 mT) to 176 mV (4.320 mT). Such enhancement of performance is primarily accounted for the enrichment of the reactive ion OH– on the electrode surface induced by the inductive electric potential derived from the Faraday induction effect of the AMF. This condition increased the electrode potential and thus the charge transfer rate on the one hand and weakened the diffusion of the active substance from the electrolyte to the electrode surface on the other hand. The OER process was dominantly controlled by the charge transfer process under low current conditions. A fast charge transfer rate boosted the OER performance of the catalyst. At high currents, diffusion exerted a significant effect on the OER process and low OH– diffusion rates would lead to a decrease in the OER performance of the catalyst.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Dazhong Yang,Manyu Shi,Juan Zhang,Atsushi Sasaki,Masatoshi Endo
Arsenic-contaminated red mud (As-RM) is a hazardous waste with limited recycling approaches. Generally, through reductive roasting and magnetic separation, RM could be transformed into Fe-rich concentrate for Fe resource recovery. However, due to the poor thermostabilization of As species, reductive roasting of As-RM would cause severe As volatilization pollution together with high As leaching risks from heated residue. Herein, a novel johnbaumite-based As thermostabilization strategy is developed for clean Fe resources recycling from As-RM. We found that in the presence of Ca(OH) 2 , the As species in As-RM could be immobilized as thermostable and insoluble johnbaumite (Ca 5 (AsO 4 ) 3 OH) at 900 °C, effectively enhancing the As thermostability and insolubility. Introducing 1.5% Ca(OH) 2 into As-RM suppressed the As volatilization ratio from 60.3% to 15.7% during reductive roasting. Meanwhile, the As leaching concentration of the reduced residue was reduced to < 100 µg/L, thus satisfying the Japanese wastewater discharge standard. A concentrate with approximately 67.5% total iron grade was obtained from As-RM through this clean reductive roasting and magnetic separation. Overall, the approach introduced in this work effectively reduces the As diffusion pollution deriving from As-RM thermal reduction, which could contribute to hazardous As-RM reutilization, clean Fe resources recovery, and As pollution mitigation.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Siyu Gui,Weiwei Tang,Zhihao Huang,Xinchen Wang,Siyin Gui,Xiang Gao,Duncheng Xiao,Liming Tao,Zhengxuan Jiang,Xianwen Wang
Diabetic retinopathy (DR) is the most prevalent type of retinal vasculopathy and the most widespread cause of preventable blindness in adults. Excessive increases in reactive oxygen species (ROS) and vascular endothelial growth factor are major initiators and drivers of DR progression, respectively. However, current DR treatment options remain limited, particularly for early DR. Nanotechnology-mediated antioxidant strategies are gaining increasing popularity to treat ocular diseases. Quercetin has excellent ROS scavenging efficiency but poor stability and low bioavailability in physiological environments. In this study, ultrasmall Fe-Quer nanozymes (NZs) formed by coupling quercetin with low-toxic iron ions are reported that can mimic the activities of three important antioxidant enzymes, superoxide dismutase, catalase, and peroxidase, thereby exhibiting excellent water dispersion and efficient ROS scavenging ability. In vitro and in vivo assays validate the effects of Fe-Quer NZs against inflammation, oxidative stress damage, microvascular leakage, and angiogenesis, particularly their vascular protective effect in early DR. Transcriptomic analysis further reveals a potential multitarget-specific therapeutic mechanism of Fe-Quer NZs against DR. These observations open avenues for Fe-Quer NZs, composed of molecules of a natural product and metal ions with artificial NZ activity, as microvascular protective agents for DR and other ROS-related diseases.
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