Journal of Cleaner Production
·
2023
·
IF 11.1
Shu Wang,Nanqi Ren,Danhui Liang,Jifei Chang,Xin Wang,Jiaguo Yan,Xiang Cheng,Lili Dong,Nan Li
Vivianite is an important bio-induced product of dissimilated iron reduction (DIR), which exists widely in activated sludge and digested sludge of wastewater treatment plants (WWTPs). Extracellular polymeric substances (EPS) surrounding dissimilatory iron-reducing bacteria (DIRB) were reported to be transient media for microbial extracellular electron transfer (EET) and DIR. However, what happens when a layer of EPS envelops microbial cells during vivianite recovery? This study tried to assess the relationship between iron reduction and electron transfer by stripping EPS layer-by-layer, then clarified the delamination of different EPS layers on the performance of vivianite recovery. After stripping total EPS (PC-EPS batches) of DIRB, the Fe (III) reduction efficiencies ( R Fe ), Fe (III) reduction rate ( V Fe ), and vivianite formation efficiency ( R V ) decreased by 33%, 37%, and 30%, respectively. Tightly bound-EPS (TB-EPS) was confirmed to play a crucial role in vivianite formation, which contributed 28–51% to vivianite recovery and 34–55% to iron reduction. Electronic shuttle substances were contained in TB-EPS, which enhanced the EET rate and efficiency between cells and Fe (III). The polysaccharide content of TB-EPS was positively related to adhesiveness between cells and mineral, as well as the iron reduction efficiency. Furthermore, redox proteins (PpcA, OmcB) were embedded in EPS, which shortened the distance of electron hopping to across the EPS layer and further accelerated vivianite recovery from wastewater. Long-term operation of anaerobic reactors confirmed that TB-EPS played critical roles in bio-induced vivianite formation.
研究领域:
环境科学
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微生物学
·
污水处理
·
生物地球化学
✓ 已验证
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Jiaxing Ban,Barbara Lothenbach,John L. Provis,George Dan Miron,Zeyu Zhou,Dengquan Wang,Sergey V. Churakov,Bin Ma
Hydrotalcite-group layered double hydroxide (LDH) phases are important in many technical and geological contexts, and in applications ranging from environmental processes to catalysts to cements. This study systematically investigates the roles of Fe in LDH structures across varying pH conditions relevant to concrete environments, combining laboratory-based characterization, synchrotron-based techniques, and thermodynamic modeling. Elevated pH enhances Fe incorporation into the LDH phase, while suppressing ferrihydrite formation. At pH > 11, partial LDH dissolution is observed. Thermodynamic modeling and diffractometry reveal the transformation mechanism: control of the initial pH increases promotes Al(III) and Fe(III) uptake into LDH structures, while further alkalinization (pH > 11) triggers selective Al(III) dissolution, thereby increasing the M 2+ /M 3+ ratio and altering unit cell parameters. These findings elucidate the dynamics between Fe(III) incorporation in LDH and ferrihydrite precipitation, governed by pH-dependent solubility and charge-balance constraints.
研究领域:
无机化学
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材料科学
·
环境地球化学
·
水泥化学
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 40
·46723
·
IF 1.901
Wan Xu,Bin Liu,Xiaobo Cai,Mohan Zhang,Xing-Hong Zhang,Peilin Yu
Polyurethane (PU) is widely used in biomedical applications owing to its excellent physical and chemical properties. As an isocyanate-free PU material, fluorescent poly(hydroxyurethane) (FPHU) is synthesized from the addition of the cyclic carbonates with amines rather than the toxic isocyanate with diols, which reduces the possible injury to the human due to trace amounts of the isocyanate residues. Herein, we report the biocompatibility of a FPHU that can be synthesized from carbon dioxide, bisepoxides, and diamine in tandem. Of unique, FPHU exhibits a strong blue fluorescence and is selectively sensitive to Fe 3+ with a detection limit of 4.56 μ M . The overall results of the methylthiazolyldiphenyl-tetrazolium, cytokine release, and hemolysis assays for FPHU indicates that FPHU has much lower cytotoxicity and immunotoxicity compared with the traditional isocyanate PU, as well as a good blood compatibility with less than 5% hemolysis rate. Therefore, FPHU presents as a kind of safer PU and can be prospectively applied in medical materials.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2026
·
IF 3
F.F. Yan,S.L. Zhang,T. Li,T.T. Zhang,H.Y. Dai
This study focuses on the regulatory effects of structural evolution and vacancy defects induced by Fe-ion substitution at the Mn site on the physical properties of gadolinium manganite (GdMnO 3 ) materials synthesized via the solid-phase reaction method. The single-phase structure of synthesized GdMn 1- x Fe x O 3 ceramics was confirmed by X-ray diffraction (XRD) and Raman analyses, and lattice deformation due to the substitution of Mn ions with Fe ions in GdMnO 3 was observed. X-ray photon spectroscopy (XPS) results confirmed the presence of Fe 2+ /Fe 3+ and Mn 4+ /Mn 3+ in the GdMn 1- x Fe x O 3 samples, and their mutual interactions led to changes in their relative concentrations. Positron annihilation spectroscopy results indicated that Fe 3+ substitution significantly influences the size and concentration of vacancy defects in the GdMn 1- x Fe x O 3 system. Temperature and magnetic field dependent magnetization measurements revealed that Fe-ion substitution could improve the magnetic properties of GdMnO 3 . Compared with the magnetic moment contribution from Fe ions, the double-exchange interaction between Mn 3+ and Mn 4+ ions, cation vacancies, and lattice distortion caused by Fe ion substitution exerted more dominant influence on the magnetic properties of GdMnO 3 . These results demonstrate that the introduction of vacancy defects and the conversion of Mn 3+ to Mn 4+ represent an effective strategy for optimizing the properties of the GdMnO 3 system.
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DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 11
·700
·
IF 4.8
Wenqi Gao,Yuan Meng,Xinran Zhang,Liqiang Liu,Yunjie Zhang,Jin Zhou,Zifei Sun
Iron-based carbon nanofibers (Fe-CNFs) have garnered significant attention due to their promising applications as functional materials or precursors in the field of catalysis, energy storage, and electromagnetic interference shielding. In this work, electrospun Fe3O4-CNFs were reduced under a H2/Ar atmosphere to obtain Fe-CNFs, and the reduction temperature and holding time were systematically optimized. Notably, a pronounced carbon gasification phenomenon was observed at elevated temperatures (>550 °C), leading to a complete consumption of the carbon matrix. The underlying mechanism was explored using temperature-programmed reduction with mass spectrometry (TPR-MS) and density functional theory (DFT) calculations. The results suggest that the carbon gasification during the H2reduction process is primarily driven by the carbon-water reaction, which can be catalyzed by the in situ-formed Fe nanoparticles. As the temperature increases, various reactions—including hydrogen dissociation, H2spillover, carbon-water reaction, and Boudouard reaction—may progressively consume the carbon framework, ultimately leading to structural collapse and complete material loss. This study elucidates the underlying mechanism of carbon-water reaction and provides practical guidance for the optimization of synthesis parameters, thereby enhancing the yield and structural integrity of free-standing Fe-CNFs for their application in catalysis and energy storage-related fields.
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DOI
PubMed
高影响因子
Cancer Nanotechnology
·
2025
·
IF 4.8
Zhou Youwei,Cheng Sheng,Shu Lei,He Wenzhu,Chen Ying,Wang Yan,Li Xuqing,Wei Zhaolian
Objective The targets and active components that affect the prognosis of cervical cancer remain unclear. Methods Three microarray datasets were collected for differentially expressed genes (DEGs) screening. The pathway, function, protein interaction and prognosis were analysed. The active components, related targets, the active ingredient-target gene network were conducted. The protein expression of the hub gene was validated through immunohistochemistry and Nanodrugs Que-Fe NDs were prepared and validated by in vitro cellular functionalization experiment. Results 162 upregulated and 145 downregulated DEGs were screened out, including 10 hub genes, which were mainly clustered in DNA replication, cell division, proliferation, and cycle. The results of active ingredient-target gene network showed that the traditional Chinese medicine quercetin has the potential therapeutic effect on cervical cancer via targeting PCNA. Experiments focused on cellular functionalization demonstrated that the synthesized Que-Fe nanodots (NDs) were capable of decreasing the levels of proliferating cell nuclear antigen (PCNA) expression and suppressing the in vitro proliferation of HeLa cells. Conclusion The growth of cervical cancer HeLa cells was suppressed in vitro by Que-Fe NDs. This finding indicates a promising novel therapeutic target that warrants additional investigation.
研究领域:
肿瘤学
·
纳米医学
·
分子生物学
·
生物信息学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Junhui Li,Hanjie Chen,Hongling Bu,Yanfu Wei,Meiqing Chen,Wenpo Xu,Xiangying Hao,Peng Yuan
The interaction between divalent iron (Fe(II)) and humic substances (HS) is crucial for geochemical cycles in terrestrial and aquatic environments, influencing soil phosphorus (P) cycling and aquatic eutrophication. However, the impact of Fe(II)-HS interactions on P sequestration remains unclear. This research employed controlled lab experiments and advanced characterization techniques, such as X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM), to study the mechanisms of P fixation by Fe(II)-HS complexes under neutral pH and anaerobic conditions. Results indicate that Fe(II) availability is crucial for P fixation, more so than HS content. Elevated Fe/P ratios boost P removal by encouraging vivianite formation, even in the presence of HS, reducing dissolved P to below 0.3 mg/L at Fe/P of 2.2. HS primarily hinders P adsorption through competitive ligand exchange. Solution pH also impacts P fixation, with higher pH levels (≥7) enhancing P immobilization. While HS binds Fe(II) and prevents hydrolysis, Fe(II) hydrolysis products like Fe(OH) 2 /Fe(OH) 3 − can co-precipitate and remove P. XRD analysis indicated vivianite crystals form at pH 7, but their diffraction peak intensity decreases under acidic or alkaline conditions, with formation controlled by Fe species and HS. The potential pathways of P in the Fe(II)-HS system include P combining with Fe(II) to form vivianite, P combining with HS to form HS-P composites, and P combining with Fe(II)-OM species to form carbon-containing vivianite. These insights improve understanding of the Fe-C-P biogeochemical cycle and P mobility in natural environments.
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产品关联
DOI
高影响因子
CHINESE PHYSICS LETTERS
·
2024
·Vol. 41
·期 12
·128401
·
IF 3.5
Xi Wen,Yang Qin,Yu Hao,Geng Chang,Kai Huang,Ming Lei,Xiaojun Shen,Yong He,Xuchao Pan,Yufeng Wu
Electromagnetic wave-absorbing materials play a crucial role in modern electronics, particularly in stealth and communication technologies. Carbon-based materials demonstrate considerable potential for the development and use of effective wave-absorbing substances, attributed to their complex structure, lightweight nature, excellent corrosion resistance, and affordability. Notably, nitrogen-doped carbon-based two-dimensional (2D) materials exhibit a more pronounced depletion effect on electromagnetic waves owing to their increased specific surface area and numerous polarization states. This article presents the successful synthesis of nitrogen-doped carbon (NC) 2D flakes using a hydrothermal method. In addition, single Fe atoms were successfully incorporated onto their surfaces, forming Fe@NC. The wave-absorbing capabilities of the Fe@NC samples were considerably improved, achieving a minimum reflection loss (RLmin) of −69.22 dB at 11.48 GHz and an effective absorption bandwidth of 5.79 GHz. The enhancement in electromagnetic wave absorption is attributed to the synergistic effects of magnetic loss, relaxation processes, dipole polarization, and electrical conduction loss. The successful synthesis of Fe@NC opens up new avenues for the development of atomically dispersed wave-absorbing materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Lang Wang,Yonghang Zhang,Linxiang Zhou,Guangtao Luo,Zhiwei Meng,Haodong Jin,Enze Zhu,Mingli Xu
The cathode's oxygen reduction reaction (ORR) plays a crucial role in a variety of fuel cells. Developing affordable and efficient non-precious electrocatalysts for the ORR poses a major hurdle in the realm of electrochemical energy technologies. This work presents a transition metal-based catalyst, Fe-ONC, in which Fe is loaded in an oxygen-enriched nitrogen-doped carbon (NC) material. Oxygen enrichment of the catalyst was achieved by a pre-oxidation strategy. The XPS analysis reveals that Fe-ONC exhibits a higher abundance of oxidized species. The Fe of Fe-ONC exists in the form of Fe 3 O 4 particles and Fe-N x , respectively, which are uniformly distributed in the NC. The even spread of iron sites and the plentiful presence of oxygen-rich species are key factors in the superior ORR efficiency of Fe-ONC. Fe-ONC's half-wave potential (E 1/2 ) in an alkaline environment (0.1 M KOH) stands at 0.891 V, markedly surpassing the standard commercial Pt/C value (0.840 V). Additionally, Fe-ONC demonstrated enhanced longevity and resistance to ethanol in comparison to commercially available Pt/C. Fe-ONC's outstanding efficacy highlights its potential as an alternative to precious metal catalysts. The document outlines a plan for creating ORR catalytic materials that are sustainable, economical, and efficient.
研究领域:
材料科学
·
电化学能源技术
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Zedi He,Qiongfang Wang,Pinhua Rao,Lei Dong,Min Zhang,Xin Zhang,Naiyun Gao,Jing Deng
The use of antibiotics has become an indispensable part of the production and life of human society. Among them, sulfonamide antibiotics widely used in humans and animals are considered to be one of the most crucial antibiotics. However, antibiotics are difficult to degrade naturally, leading to an accumulation in the environment and a potential hazard to human health. In this paper, WS 2 as a co-catalyst could reduce trace Fe(III) to Fe(II) which exhibited a great activating ability to PS through the exposed W(IV) active sites, and formed the Fe(III)/Fe(II) cycle to degrade sulfachloropyridazine (SCP) continuously. This paper systematically discussed the degradation of SCP under different conditions in the PS/WS 2 /Fe(III) system, including the amount of WS 2 , Fe(III) concentration, PS concentration, initial pH, natural organic matter (NOM) and common anions ( NO 3 − , Cl − , HCO 3 − , HPO 4 2− and H 2 PO 4 − ). The experimental results showed that PS/WS 2 /Fe(III) system possessed a strong degradation ability for SCP in a wide pH range. NO 3 − and Cl − could promote the degradation of SCP a little. HCO 3 − , HPO 4 2− and H 2 PO 4 − could significantly inhibit the degradation of SCP. The main types of free radicals that degraded SCP were explored. In addition, the stability and reusability of WS 2 were examined, and two possible degradation pathways of SCP were proposed.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
TURKISH JOURNAL OF CHEMISTRY
·
2022
·Vol. 41
·期 6
·944-954
·
IF 1.151
YUAN XIAOTONG,QIN DAWEI,QIAO MIN,LIU GANG,LI HONGXIN,NIU XIA
The objective of the current effort was to determine the efficacy of Fe(II)-montmorillonite (Fe(II)-MMT) as an adjuvant for specific targeted adsorption of phosphate. Specifically, Fe(II)-MMT was studied to combat hyperphosphatemia and anemia arising from chronic renal failure. The adsorption of phosphate over time, pH, and initial concentration was studied. The systems were characterized by X-ray diffraction (XRD), Raman, and zeta potential. The experimental results demonstrated the adsorption time was set to 140 min to achieve maximum adsorption efficiency. It was thus found that the maximum adsorption was at pH 3.0. In addition, it reached equilibrium when the initial phosphate concentration was at 60 mg/L while the maximum adsorption capacity was 5.75 mg of phosphate/g of Fe(II)-MMT. On the other hand, adsorption isotherms showed that the Langmuir model was better than the Freundlich model. This means that the adsorption of the phosphate on Fe(II)-montmorillonites was monolayer adsorption, and the phosphate was successfully adsorbed either onto the surface or intercalated within interlayer volume. Live experiments supported the ability of Fe (II)-MMT to control hyperphosphatemia and treat chronic renal failure.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2026
·
IF 15.7
Shen Shiji,Wu Zhenduo,Liu Xiaoye,Lan Si,Wang Chengwei
With increasingly stringent application environments, there is a growing demand for designing and fabricating of promising structural materials. Conventional metallurgical methods typically struggle to produce positive mixing enthalpy alloys with uniform microstructures and consistent properties due to mutual immiscibility and uncontrollable segregation during solidification. To this end, we employ a bottom-up approach to fabricate Cu-50 vol% Fe 55 Cr 25 Mo 16 B 2 C 2 positive mixing enthalpy composites, utilizing ultrafast high-temperature sintering and instantaneous quenching. The method effectively prevents liquid segregation during the molten state and allows precise control over the size and distribution of the two phases. In addition, incorporated metallic glass particles as the hard phase additives, which can quickly form the localized multi-phase nanocrystals and establish a robust interlocking structure with pure copper during rapid sintering. Upon rapid quenching, the two phases solidify with a tight and conformal interface, while the elemental cross-diffusion and phase separation are mitigated. The mechanical tensile strength of the resulting composite is approximately 8 times greater than that of pure Cu. The wear resistance improves by 40-50 times, and the Vickers hardness increases by a factor of 10. The innovative sintering method provides a feasible pathway for developing and manufacturing of positive mixing enthalpy composite materials.
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DOI
PubMed
高影响因子
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