Small
·
2020
·Vol. 16
·期 22
·2000870
·
IF 11.459
Kezhong Lv,Pengfei Wang,Chao Wang,Zihan Shen,Zhenda Lu,Huigang Zhang,Mingbo Zheng,Ping He,Haoshen Zhou
Lithium–sulfur batteries, as one of promising next-generation energy storage devices, hold great potential to meet the demands of electric vehicles and grids due to their high specific energy. However, the sluggish kinetics and the inevitable “shuttle effect” severely limit the practical application of this technology. Recently, design of composite cathode with effective catalysts has been reported as an essential way to overcome these issues. In this work, oxygen-deficient ferric oxide (Fe 2 O 3− x ), prepared by lithiothermic reduction, is used as a low-cost and effective cathodic catalyst. By introducing a small amount of Fe 2 O 3− x into the cathode, the battery can deliver a high capacity of 512 mAh g −1 over 500 cycles at 4 C, with a capacity fade rate of 0.049% per cycle. In addition, a self-supporting porous S@KB/Fe 2 O 3− x cathode with a high sulfur loading of 12.73 mg cm −2 is prepared by freeze-drying, which can achieve a high areal capacity of 12.24 mAh cm −2 at 0.05 C. Both the calculative and experimental results demonstrate that the Fe 2 O 3− x has a strong adsorption toward soluble polysulfides and can accelerate their subsequent conversion to insoluble products. As a result, this work provides a low-cost and effective catalyst candidate for the practical application of lithium–sulfur batteries.
研究领域:
电化学
·
能源材料
·
纳米催化
·
储能技术
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 2
·1731-1736
·
IF 2.986
Jingbo Yu,Qian Zhang,Yi Gu,Anxian Lu
In this study, phosphate glasses embedded with Fe 2 O 3 quantum dots were prepared via a conventional melt quenching technology with further heat treatment. The effect of Fe 2 O 3 content on the structural, optical and magneto-optical properties was investigated. The results showed that the addition of Fe 2 O 3 had no obvious influence on the structure units that built up the host glass and the amorphous nature of glass. In the glass matrix , the existence of Fe 2 O 3 quantum dots was confirmed by high resolution transmission electron microscope . Meanwhile, optical study clearly demonstrated a red shift in optical cut-off wavelength resulted from the size quantization effect. The highest Verdet constant (22.33°/T-cm) was measured for the glass containing 1 mol% Fe 2 O 3 , which was ~ 7 times higher than that of the glass matrix. As the increment of Fe 2 O 3 contents, a phase evolution of Fe 2 O 3 quantum dots from amorphous phase to γ-Fe 2 O 3 phase was recorded due to the Ostwald Ripening effect. Interestingly, a concentration quenching phenomenon in Verdet constant was observed along with the phase evolution of Fe 2 O 3 quantum dots. When the content of Fe 2 O 3 is up to 2 mol%, the glass exhibited paramagnetism with the Verdet constant of − 2.833°/T-cm. This finding can provide a new idea for the development of quantum dot embedded magneto-optical glass.
研究领域:
材料科学
·
磁光材料
·
纳米材料
·
无机非金属材料
·
光学玻璃
·
凝聚态物理
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yan Wang,Tengfei Deng
A series of ferrite ceramics with the chemical formula Fe(Cr x Fe 2− x )O 4 ( x = 1.5, 1.6, 1.7, 1.8, 1.9) were synthesized using the solid-state reaction method. Rietveld refinement of the x-ray diffraction patterns confirmed the formation of a pure cubic spinel structure, with the lattice parameters decreasing as the Cr 3+ content ( x ) increased. Raman spectroscopy revealed the splitting of the A 1 g ${{{\mathrm{A}}}_{1{\mathrm{g}}}}$ vibrational mode into two distinct bands at 670 and 710 cm −1 that were attributed to the symmetric stretching vibrations of Fe 2+ –O and Fe 3+ –O bonds, respectively. This supports a mixed spinel-type cation distribution in which Cr 3+ and a fraction of Fe 2+ ions occupy octahedral sites, whereas Fe 3+ and the remaining Fe 2+ ions occupy tetrahedral sites. With increasing chromium content, the dielectric constant and loss tangent both decreased. Magnetic measurements showed a reduction in the remnant magnetization and coercivity. Furthermore, the samples demonstrate behavior that tends toward a superparamagnetic response. This study systematically established the relationship between the Cr/Fe ratio and the resulting structural, dielectric, and magnetic properties, underscoring the important role played by cation distribution in tuning the material properties of these ferrite ceramics.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Dongyun Que,Zihan Li,Fan Chen,Youwei Zeng,Junchi Liu,Yuyuan Yao
Designing highly efficient iron-based catalysts with adsorption and degradation of pollutants is a great challenge in the field of environmental remediation. Herein, a dual strategy of anchoring-separation was adopted to prepare novel iron-based nitrogen doped porous carbon catalysts (Fe-pNC). Arginine was innovatively selected as the anchoring agent to coordinate with Fe 3+ and even form oligomers with glucose, which was conducive to the dispersion of iron species during high-temperature pyrolysis. Fe-pNC achieved high iron loading of 16.48 wt% and large specific surface area of 480.19 m 2 /g. The Freundlich model determined a maximum SMX adsorption capacity (Qm) of 82.38 mg/g for Fe-pNC, surpassing most of recently reported SMX adsorbents. Interestingly, even after multiple PMS regenerations, Fe-pNC still exhibited excellent adsorption performance. Surprisingly, Fe-pNC exhibited better adsorption performance at low temperature, achieving 90.58 % adsorption rate at 0 °C. More importantly, the Fe-pNC/PMS system achieved 99.11 % SMX removal in 15 min with a superior apparent rate constant (k obs ) of 0.54 min −1 . Of particular significance, Cl − markedly enhanced the catalytic efficacy of the Fe-pNC for SMX removal, remarkably enhancing the catalytic degradation performance even at high concentrations. Quenching experiments combined with electron paramagnetic resonance (EPR) detections demonstrated that single-linear oxygen 1 O 2 ) and superoxide radicals (O 2 •− ) were the major reactive oxygen species (ROSs). This study provides a significant guidance into developing efficient iron-based catalysts for adsorption and removal of organic pollutants.
✓ 已验证
产品关联
DOI
高影响因子
AQUACULTURE
·
2025
·
IF 3.9
Peng-Cheng Xu,Hua Zheng,Nermeen Abu-Elala,Zhi Luo,Chong-Chao Zhong,Hong Yang,Xiao-Ying Tan
This research aimed to investigate the effects of five dietary iron sources on growth performance, feed utilization, appetite regulation, antioxidant capacity, endoplasmic reticulum (ER) stress and inflammatory response in the intestine of yellow catfish Pelteobagrus fulvidraco . The experimental diets were formulated with five iron sources, including ferrous sulfate (FeSO 4 ), ferrous bisglycinate (Fe-Gly), ferrous chloride (FeCl 2 ), ferric citrate (Fe-CA) and ferric oxide nanoparticles (Fe 2 O 3 NPs). Yellow catfish (initial body weight: 2.50 ± 0.01 g/fish, mean ± SEM) were fed the experimental diets for 10 weeks. Fish fed the diets with Fe-Gly and Fe 2 O 3 NPs supplementation displayed better growth performance, iron bioavailability, food intake and higher expression of appetite-related genes. Compared to inorganic iron (FeSO 4 and FeCl 2 ) and Fe 2 O 3 NPs, organic iron (Fe-Gly and Fe-CA) exhibited improved intestinal histology, upregulated expression of tight junction-related genes and enhanced antioxidant capacity. Dietary Fe 2 O 3 NPs addition damaged the intestinal antioxidation capacity of yellow catfish by down-regulating the expression and activities of related antioxidant enzymes. Besides, fish fed the Fe 2 O 3 NPs diet also showed higher mRNA and protein levels of ER stress-and inflammation-related genes. Given the above findings, Fe-Gly seems to be a better iron additive for its benefits on growth performance and intestinal health to other iron sources.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bohan Zheng,Guangxu Yin,Shuang Yang,Lvping Fu,Meijie Zhang,Ao Huang,Huazhi Gu
Typically, advanced solar absorber coatings containing chromium (Cr) achieve high solar absorption efficiencies. However, large-scale applications raise concerns regarding the safety and cost due to the potential toxicity of Cr. This study develops a Cr-free (Fe x Co 0.25 Mn 0.25 Cu 0.25 ) 3 O 4 spinel coating based on tuning Fe content, which exhibits enhanced solar absorption and thermal stability. As Fe content increases, a single spinel structure is stabilized, accompanied by lattice expansion. Meanwhile, the covalent competition among cations at the tetrahedral sites in the structure is enhanced, facilitating the migration of Co and Mn ions from tetrahedral to octahedral sites. This process alters the valence distribution and lattice symmetry, leading to a reduction in oxygen vacancies (O V ) and an increase in the bandgap. Consequently, the solar absorptance was enhanced from 90.6 % to 93.2 % by decreasing Fe content in the single spinel structure, while infrared emissivity exhibits a significant increase in emissivity at 2.5–7.8 μm. After 60 thermal cycles at 750 °C, the (Fe 0.25 Co 0.25 Mn 0.25 Cu 0.25 ) 3 O 4 coating exhibits improved solar absorptance (94.9 %) and reduced thermal emissivity (90.2 %), ultimately enhancing the thermal efficiency to 89.3 %. This work provides a new option for Cr-free solar absorption coatings with tailored performance in high-temperature concentrated solar power (CSP) systems.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Weiwei Wang,Xueying Jia,Yuhao Zhang,Bing Qin,Ying Wang,Chenyu Yang,Qinghua Liu
Li 5 FeO 4 (LFO), an ideal cathode prelithiation additive for lithium-ion batteries, has attracted significant interest because of its extremely high capacity, suitable voltage window, and environmental friendliness. However, the solid-phase synthesis process of LFO is not clear and suffers from the exorbitant cost of Li 2 O, making finding an alternative lithium source for improving cost-effectiveness in industrial production crucial. In this study, LFO materials were synthesized via a solid-phase sintering method involving two types of lithium sources. Utilizing in-situ X-ray diffraction and X-ray absorption fine structure spectroscopy, the evolution mechanism of solid-phase synthesis was elucidated. In particular, a low-temperature plateau was determined for the synthesis process employing LiOH as the lithium source. Compared with Li 2 O-derived O-LFO, the as-obtained prelithiation additive H-LFO achieved an ∼69.7% cost reduction with satisfactory initial charge capacity, energy density and cycling stability in industrial-scale applications. This work provides a practical solution for promoting prelithiation technology and reducing the preparation cost of prelithiation additives.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Chenyang Jing,Da Bi,Hao Yan,Yangyang Pan,Donald B. Dingwell,Wenjia Song
Airborne particles such as sand, dust, and volcanic ash pose a severe threat to the reliability of thermal barrier coatings (TBCs) in jet engines. Upon ingestion into engines, these silicate-rich particles melt and form deposits that undergo complex spreading and adhesion dynamics on coating surfaces, ultimately leading to coating degradation. To simplify the reproducibility and comparability of experimental studies synthetic calcium–magnesium–alumino–silicate (CMAS) particles are commonly employed as simulants. Here, high-temperature deposition experiments have revealed that partially molten droplets (containing solid inclusions), exhibit heterogeneous spreading morphologies beyond classical viscous flow. A compound droplet model integrating heat transfer and spreading dynamics has been developed to describe quantitatively the deposition behavior of such partially molten particles. A physics-informed machine learning model, trained on 105 experimental cases was developed and has demonstrated superior predictive performance, with support vector regression achieving the highest accuracy (R 2 ≈ 0.71, RMSE ≈ 0.13). This combined experimental–computational strategy establishes a robust predictive paradigm linking natural threats (sand, dust, volcanic ash) with CMAS simulants, providing mechanistic insights into and mitigation strategies for CMAS-related degradation to enhance the operational reliability of aeroengines.
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Guangyao Yang,Bingjie Liu,Shiyuan Xie,Yongqing Xu,Jingbo Jia,Hui Zhou,Dongwu Chang,Changfu You,Haiming Wang,Junfu Lyu
Biomass chemical looping gasification (BCLG) demonstrates great potential to help address global environmental issues and green energy demands. Yet it remains a challenge to develop novel oxygen carriers (OCs) in BCLG to break the trade-off between the biomass conversion and syngas selectivity with high syngas yield. In this study, Sr–Fe OCs labelled as S3F2, S4F2, and S5F2, containing primarily of Ruddlesden–Popper (R-P) layered perovskite structured Sr 3 Fe 2 O 7-x , were synthesized. Sr 3 Fe 2 O 7-x thermodynamically favors the selective formation of CO over CO 2 , conferring its inherently high CO selectivity. Both the interstitial oxygen and lattice oxygen were found to contribute to the gasification process, which presented enhanced activity and oxygen uncoupling characteristic. The excessive Sr incorporation in S4F2 and S5F2 further increased the oxygen vacancies of Sr 3 Fe 2 O 7-x , and caused a much higher oxygen mobility and oxygen release capacity (S5F2 > S4F2 > S3F2). Additional Sr in S5F2 formed Sr(OH) 2 ·H 2 O on Sr 3 Fe 2 O 7-x surface, which acted as additional oxygen source for gasification and also suppressed the overoxidation of syngas product on the surface. These combined features enabled the most favorable performance of S5F2 with a carbon conversion of 91%, CO selectivity of 94%, and syngas yield of 1208 mL/g at 900 °C, much higher than the Fe 2 O 3 benchmark (77.8%, 59.8%, and 557.9 mL/g, respectively).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Zhuang Sun,Kai Dong,Guangsuo Yu,Fuchen Wang,Lu Ding
Chemical looping hydrogen production (CLHP) offers a promising route for continuous high-purity H 2 generation with integrated carbon capture. Fe 2 O 3 is a commonly used oxygen carrier (OC) in CLHP but is limited by moderate reactivity and low stability. Employing ionic conductor as OC support has been proposed to overcome these limitations, yet the underlying mechanisms, particularly the OC-support interactions, remain unclear. Here, we investigated CaTiO 3 as a model support and Al 2 O 3 as a reference to elucidate the origins of enhanced performances. The CaTiO 3 -Fe 2 O 3 composite exhibited a substantially high reduction rate (~4 times), significantly increased H 2 yield (50% ~ 280%), and enhanced stability over multi redox cycles compared to the reference, comparable to Fe 2 O 3 supported on well-established ionic conductors. The improved performance is ascribed to increased oxide ion mobility within the bulk Fe 2 O 3 . DFT calculations revealed that the oxide ion mobility was synergistically driven by low-concentration Ti doping and CaTiO 3 induced tensile strain.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shuanglan Cheng,Shujie Bai,Xianbao Xu,Xia Gu,Xu Duan,Haowen Duan,Xiang Li,Gang Xue,Francisco Jesús Fernández-Morales,Jacek Makinia
The establishment of a bacterial-fungal system provides a promising route for medium-chain fatty acid production from food waste using endogenous electron donors (ED). However, its broader application has been limited by restricted electron transfer between bacteria and fungi. In this study, ferric oxide was incorporated to enhance caproate production from food wastes (FW). The findings reveal that 5 g/L ferric oxide addition resulted in 1.3 times increase in the caproate production than the control. The endogenous ethanol production reached 10.6 ± 1.2 g COD/L, which was further indicated as the dominant ED by linear analysis. Mechanistic analysis revealed that ferric oxide improved the fermentation environment by lowering pH, stimulating dissimilatory iron reduction, enhancing extracellular polymeric substance secretion, and increasing electron transport system activity. Furthermore, ferric oxide supplementation promoted the enrichment of the caproate-producing bacterium Caproiciproducens , with its relative abundance increasing by 5.28-fold compared to the control. Candida was identified as the dominant ethanol-producing yeast. Metagenomic analysis indicated that ferric oxide primarily increased the abundances of genes associated with the reverse β -oxidation pathway and extracellular electron transfer. This study elucidates the mechanism by which ferric oxide enhances bacterial-fungal synergy and electron transfer to drive endogenous ethanol-driven chain elongation, providing a feasible strategy for the valorization of organic waste.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Tong Yu,Junyu Zhao,Jie Zhang,Qian Li,Tangze Deng,Jinwei Chen,Gang Wang,Ruilin Wang
Vanadium phosphorus oxide (VPO) is regarded as the most efficient catalyst for the selective oxidation of n- butane towards maleic anhydride (MA). However, to a certain extent, its industrial applications are restricted by the “trade-off” effect between n -butane conversion and MA selectivity. Here, an iron phosphorus oxide (FePO) catalyst was synthesized using a modified molten salt method and characterized. The optimum Fe 0.25 PO catalyst achieved considerable catalytic performance with n -butane conversion of 59.77 %, MA selectivity of 59.07 %, and MA yield of 35.31 %. Various characterizations revealed the relationship between the catalytic performance and physicochemical properties such as the crystal structure, surface P/Fe ratio, oxygen species, and surface acidity. The results indicated that the ordered Fe(PO 3 ) 3 structure was the primary active phase for the Fe 0.25 PO catalysts, in which the abundant exposure of Fe 3+ sites and active oxygen species contributed to improving the reactivity and n -butane conversion. In addition, acid sites distribution, Lat-O/Sur-O, Fe 3+ /Fe 2+ , P/Fe, and O/Fe are critical factors for determining the activity and MA selectivity. The exploration of FePO catalysts offers a guideline for the development of high-performance catalysts to replace VPO for n -butane selective oxidation to MA.
✓ 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）