JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Bin Liu,Danjing Lu,Tianliang Zhang,Yixun Shen,Zhen Qiu,Xin Mao,Ruoxi Wu
Landfill leachate, with its high concentrations of persistent organic pollutants, salts, heavy metals, and emerging contaminants, presents significant environmental challenges. This study investigated the combination of dielectric barrier discharge (DBD) and ferrate (Fe(VI)) pretreatment technology in landfill leachate treatment, focusing on its effectiveness in enhancing oxidation performance and mitigating membrane fouling. The results indicated that after DBD/Fe(VI) treatment, TOC and UV 254 removal efficiencies increased by 44 % and 67 %, respectively. Additionally, the DBD/Fe(VI) system excelled in removing fluorescent substances and high molecular weight organic compounds, thereby reducing the formation of the cake layer on the nanofiltration membrane. This system enhanced oxidation performance through the synergistic production of reactive intermediates, with Fe(V)/Fe(IV) and •OH being the main active species, O 2 •- , and 1 O 2 also contributing significantly. The degradation pathway of perfluorooctanoic acid was investigated by utilizing it as the representative pollutant. Compared to the raw landfill leachate system, the DBD/Fe(VI) increased membrane flux by 104 %, while reducing reversible and irreversible fouling resistances by 67 % and 75 %, respectively. Furthermore, the advantages and practical application potential of the DBD/Fe(VI) system were evaluated from energy consumption, economic cost, and carbon dioxide emissions. The study offers an innovative method for landfill leachate treatment and fouling mitigation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dingdiao Mo,Jiaxing Zhang,Guoxiang Chen,Zihao Huang,Xiangao Liu,Weitong Cai,Jie Cui,Wei Su
The electrodeposition method is commonly used for fabricating water splitting catalysts. Traditional methods assume a static precursor solution, ignoring the effects of solution dynamics. We theorized that stirring the solution during electrodeposition could improve mass transfer and current distribution, thereby enhancing electrochemical kinetics and nucleation. Consequently, we developed a novel electrodeposition technique to synthesize Fe-doped NiSe, an effective catalyst for alkaline water hydrolysis, demonstrating exceptional performance and stability. This catalyst notably decreases the overpotentials for OER and HER to 185/266 mV and 101/271 mV at 10 and 300 mA cm −2 , respectively. At the same time, the overall water splitting system comprising this catalyst requires only a low potential of 1.48 V to stably catalyze water splitting for over 60 hours. Electrochemical tests indicate that stirred deposition endows the catalyst with a larger electrochemically active area. In-situ Raman spectroscopy reveals NiOOH as an active phase, and Fe doping facilitates NiOOH formation at lower overpotentials, enhancing OER performance. First-principles calculations suggest that Fe doping optimizes the rate-determining step, lowers the activation energy for the OER process, and boosts conductivity. This study presents a method to improve OER efficiency in Ni-based catalysts, offering insights into mechanism control.
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MICROBIAL PATHOGENESIS
·
2025
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IF 3.5
Qiaowen Wang,Xiao Huang,Dingjun Wang,Biying Zhong,Mengyuan Xu,Li Liu,Tiantian Liu
Background Multidrug-resistant Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) are emerging in large numbers, while the rapid development of antimicrobial nanomaterials offers new opportunities to combat bacterial infections and antimicrobial resistance. Objectives We employed the nanomaterial MIL-101(Fe) as a carrier loaded with Patchouli alcohol (PA) to form the complex MIL-101(Fe)-PA. and to investigate the inhibitory activity of MIL-101(Fe)-PA against S. aureus and E. coli . Methods According to the literature,we prepared MIL-101(Fe)-PA by solvent method. Characterization of MIL-101(Fe)-PA was carried out using scanning electron microscopy(SEM), Fourier transform infrared(FT-IR) spectroscopy,X-ray diffractometer (XRD) and Brunauer-Emmett-Teller (BET) adsorption analysis. In the bacteriostatic experiments,its bacteriostatic effect was investigated by Minimal inhibitory concentration (MIC) experiments, cell proliferation,and growth curves of bacteria. Then its cytotoxicity was explored by cytotoxicity experiments. Results The characterization results indicated that we successfully prepared the complex MIL-101(Fe)-PA,which showed significant bacteriostatic effects against S. aureus and E. coli at 2 mg/mL. The inhibitory effect was stronger than that of MIL-101(Fe) as well as PA. Conclusion It shows that MIL-101(Fe)-PA has excellent inhibitory effect on S. aureus and E. coli.
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Journal of Water Process Engineering
·
2024
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IF 6.3
Long Fang,Xi Zheng,Ruina Yuan,Tianyuan Xu,Minwang Laipan,Yijun Cao,Yaowen Xing,Xiahui Gui
Persulfate (PS)-based advanced oxidation process is an excellent technology for removing organic pollutants. Herein, an Al-Fe‑carbon hybrid composite (AlFeOH/CS) by hybridizing bimetal Al-Fe and carbon sphere was synthesized and its ability to activate PS was evaluated. Within 120 min reaction in the presence of PS, 70 % of aniline was removed by FeOH/CS, while >99.9 % of aniline was degraded by AlFeOH/CS. Moreover, AlFeOH/CS exhibited wide pH applicability, relatively high resistance to inorganic anions, and strong stability for PS activation. Electron paramagnetic resonance (EPR) and quenching tests revealed that aniline degradation in the AlFeOH/CS/PS system occurred via a radical pathway, with O 2 − the dominant reactive oxygen species. The enhanced photocatalytic activity of AlFeOH/CS was attributed to: Al doping could 1) increase the specific surface area and porosity, exposing more active sites, 2) facilitate electron transfer from Fe atoms to PS, and 3) enhance the generation of carbon-centered persistent free radicals (PFRs). Depending on the carbon-centered PFRs, carbonyl functional groups, sp 2 and sp 3 -hybridized carbon, and Fe/Al hydroxides on AlFeOH/CS, PS was effectively activated to produce free radicals for aniline degradation. These findings provide new insights into the design of functional hydrothermal carbonaceous material with high stability and PS activation efficiency for removing organic contaminants.
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SOLID STATE SCIENCES
·
2024
·
IF 3.4
Zhan Tian,He Wang,Guoqiang Li,Hongrui Jia,Guoxin Zhang
NiFe 2 O 4 has emerged as an efficient oxygen evolution reaction (OER) electrocatalyst, with outstanding stability in alkaline media and excellent redox properties. In order to further improve the catalytic performance, thinly-walled NiFe 2 O 4 nanotubes (NiFe 2 O 4 -NTs), efficiently derivable from Ni, Fe, N-codoped carbon nanofibers, were innovatively synthesized through a sequential route combing hydrothermal, electrospinning, and high-temperature sintering in this work. The NiFe 2 O 4 -NTs possess large diameter of around 120 nm and their thickness of the tube wall is only about 10 nm. The surface properties of NiFe 2 O 4 can be adjusted by forming the Ni-N/Fe-N bonds. Excitingly, largely exposed active surface area and boosted catalytic reaction kinetics toward oxygen evolution reaction are realized. The required overpotential to deliver 10 mA cm −2 is only 331 mV, accompanied with favorable Tafel slope of only 51.8 mV dec −1 , small charge transfer resistance, and superior reaction stability.
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Carbon Energy
·
2025
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IF 24.2
Zhao Sun,Kun Lei,Louise R. Smith,Nicholas F. Dummer,Richard J. Lewis,Haifeng Qi,Kieran J. Aggett,Stuart H. Taylor,Zhiqiang Sun,Graham J. Hutchings
Advanced oxygen carrier plays a pivotal role in various chemical looping processes, such as CO 2 splitting. However, oxygen carriers have been restricted by deactivation and inferior oxygen transferability at low temperatures. Herein, we design an Fe–O v –Ce–triggered phase-reversible CeO 2− x ·Fe·CaO ↔ CeO 2 ·Ca 2 Fe 2 O 5 oxygen carrier with strong electron-donating ability, which activates CO 2 at low temperatures and promotes oxygen transformation. Results reveal that the maximum CO 2 conversion and CO yield obtained with 50 mol% CeO 2− x ·Fe·CaO are, respectively, 426% and 53.6 times higher than those of Fe·CaO at 700°C. This unique multiphase material also retains exceptional redox durability, with no obvious deactivation after 100 splitting cycles. The addition of Ce promotes the formation of the Fe–O v –Ce structure, which acts as an activator, triggers CO 2 splitting, and lowers the energy barrier of C═O dissociation. The metallic Fe plays a role in consuming O 2− lattice transformed from Fe–O v –Ce, whereas CaO acts as a structure promoter that enables phase-reversible Fe 0 ↔ Fe 3+ looping.
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Energy & Environmental Science
·
2024
·Vol. 17
·期 20
·7958-7968
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IF 32.4
Yaoshen Niu,Zilin Hu,Huican Mao,Lin Zhou,Liguang Wang,Xiaobing Lou,Bo Zhang,Dongdong Xiao,Yang Yang,Feixiang Ding,Xiaohui Rong,Juping Xu,Wen Yin,Nian Zhang,Zhiwei Li,Yaxiang Lu,Bingwen Hu,Jun Lu,Ju Li,Yong-Sheng Hu
Na-ion batteries (NIBs) are emerging as a promising alternative to Li-ion batteries (LIBs). To align with sustainability principles, the design of electrode materials must incorporate considerations for abundant and environmentally friendly elements, such as redox-active Fe. Despite its appeal, the enduring challenge of Fe migration in layered cathodes remains inadequately addressed over decades. Here, we propose a “seat-squatting” strategy via Li-substitution to fundamentally suppress Fe migration. Li is strategically introduced to migrate first, occupying available migration sites without inducing structural damage and effectively raising the activation energy for Fe migration. Experimental and theoretical validation using O3-Na0.83Li0.17Fe0.33Mn0.5O2 (NaLFM) demonstrates a robust suppression of irreversible Fe migration. As a result, the NaLFM cathode delivers enhanced structural and electrochemical cycling stability. This work illustrates a compelling strategy to curb irreversible Fe migration in NIBs, offering a pathway for the development of stable and cost-effective layered oxides based on Fe redox centers.
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Nano Energy
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2021
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IF 17.881
Rui Qi,Mihai Chu,Wenguang Zhao,Ziwei Chen,Lei Liao,Shisheng Zheng,Xiping Chen,Lei Xie,Tongchao Liu,Yang Ren,Lei Jin,Khalil Amine,Feng Pan,Yinguo Xiao
Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems , on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na 0.65 Li 0.08 Cu 0.08 Fe 0.24 Mn 0.6 O 2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g −1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
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Water Reuse
·
2024
·Vol. 14
·期 1
·39-50
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IF 4.3
Huang Yiru,Li Youyou,Zhong Qingwei,Luo Chen
View large Download slide View large Download slide Close modal Metal-organic framework (MOF) materials, characterized by their porosity and large specific surface areas, exhibit excellent adsorption properties. With the aim of removing Te(IV) from environmental aquatic systems, this study is the first to propose the use of MIL-100(Fe). The material reveals a strong adsorption capacity for Te(IV), with maximum adsorption of 531.9 mg/g, superior to other adsorbent materials. Adsorption isotherm and kinetic models indicate that the adsorption process primarily involves monolayer chemical adsorption. According to the thermodynamic parameters, the adsorption reaction is endothermic. The experiment individually examined factors affecting the material's adsorption performance, including adsorbent dose, initial concentration of Te(IV), pH, adsorption time, and coexisting ions. Even under high ion strength conditions and high concentrations of coexisting ions, the material's adsorption efficiency for Te(IV) still reached over 94%. The material has been successfully applied to remove Te(IV) from lake water, river water, and seawater, yielding satisfactory results. Due to the high salinity and ionic strength of the solution, the removal efficiency of Te(IV) in the seawater matrix was slightly lower than that in freshwater (river and lake water). Thus, this material shows promise for the removal of Te(IV) from complex aquatic systems. MIL-100(Fe) was prepared and characterized. The Te(IV) can be adsorbed by MIL-100(Fe) effectively, and the adsorption process was primarily a monolayer chemical adsorption and an endothermic reaction. The Te(IV) can be removed effectively in environmental water supplies by MIL-100(Fe).
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Siyuan Zhu,Jun Ke,Zhongnan Chen,Zhaoyang Yan,Lulu Zhao,Xinhong Qiu
Secondary aluminum dross (SAD) as a hazardous waste has been widely studied on recycling by acid leaching process, but residues accounting for approximately 50 wt% of SAD are still produced and rarely reused. In this study, residues from secondary aluminum dross are retrieved to fabricate Fe-based acidized aluminum ash sludge (FAS) heterojunction catalyst for photocatalytic degrading tetracycline hydrochloride under visible light, which does not only reduce resource utilization cost of SAD, but also realize efficient wastewater treatment by clean photocatalytic technique. Firstly, acidized sludge was obtained from SAD via an acid leaching and then utilized to fabricate FAS by calcination method. From the results of characterizations, BaFeO 3-x and Fe 2 O 3 were demonstrated to be deposited on the surface of acidized sludge, resulting in the successful formation of FAS heterojunction catalyst. As a result, the FAS exhibits an excellent performance in the removal of tetracycline hydrochloride (TCH), reaching to 92.2 % within 150 min under dark adsorption and visible light excitation. To further broaden the application of FAS in actual circumstance, the degradation of mixed dye in wastewater and actual medical wastewater were conducted over the optimal sample of FAS. After four cycles, the removal ability remained at 86.0 %, which shows the exceptional stability.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Li Long,Xuechun Wang,Heyun Fu,Xiaolei Qu,Shourong Zheng,Zhaoyi Xu
Iron-based materials are effective for the reductive removal of the disinfection byproduct bromate in water, while the construction of highly stable and active Fe-based materials with wide pH adaptability remains greatly challenging. In this study, highly dispersed iron phosphide-decorated porous carbon (Fe2P(x)@P(z)NC-y) was prepared via the thermal hydrolysis of Fe@ZIF-8, followed by phosphorus doping (P-doping) and pyrolysis. The reduction performances of Fe2P(x)@P(z)NC-y for bromate reduction were evaluated. Characterization results showed that the Fe, P, and N elements were homogeneously distributed in the carbonaceous matrix. P-doping regulated the coordination environment of Fe atoms and enhanced the conductivity, porosity, and wettability of the carbonaceous matrix. As a result, Fe2P(x)@P(1.0)NC-950 exhibited enhanced reactivity and stability with an intrinsic reduction kinetic constant (kint) 1.53–1.85 times higher than Fe(x)@NC-950 without P-doping. Furthermore, Fe2P(0.125)@P(1.0)NC-950 displayed superior reduction efficiency and prominent stability with very low Fe leaching (4.53–22.98 μg L–1) in a wide pH range of 4.0–10.0. The used Fe2P(0.125)@P(1.0)NC-950 could be regenerated by phosphating, and the regenerated Fe2P(0.125)@P(1.0)NC-950 maintained 85% of its primary reduction activity after five reuse cycles. The study clearly demonstrates that Fe2P-decorated porous carbon can be applied as a robust and stable Fe-based material in aqueous bromate reduction.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Chen Tiantian,Zhang Ganbing,Sun Hongwei,Hua Yetong,Yang Shu,Zhou Dandan,Di Haoxin,Xiong Yiling,Hou Shenghuai,Xu Hui,Zhang Lizhi
The microenvironment regulation of Fe-N 4 single atom catalysts (SACs) critically governs peroxymonosulfate (PMS) activation. Although conventional heteroatom substitution in primary coordination enhances activity, it disrupts Fe-N 4 symmetry and compromises stability. Herein, we propose oxygen doping in the secondary coordination shell to construct Fe-N 4 -C 6 O 2 SAC, which amplifies the localized electric field while preserving the pristine coordination symmetry, thus trading off its activity and stability. This approach suppresses Fe-N bond structural deformation (bond amplitude reduced from 0.875–3.175 Å to 0.925–2.975 Å) during PMS activation by lowering Fe center electron density to strengthen Fe-N bond, achieving extended catalytic durability (>240 h). Simultaneously, the weakened coordination field lowers the Fe=O σ* orbital energy, promoting electrophilic σ-attack of high-valent iron-oxo towards bisphenol A, and increasing its degradation rate by 41.6-fold. This work demonstrates secondary coordination engineering as a viable strategy to resolve the activity-stability trade-off in SAC design, offering promising perspectives for developing environmental catalysts.
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