Journal of Energy Storage
·
2025
·
IF 9.8
Haiquan Zhang,Fuge Wang,Susu He,Bozhou Cao,Qiadong Yao,Ning Wang
Smart phase change materials (PCMs) have been carefully engineered using cutting-edge manufacturing techniques to meet specific application requirements. A multifunctional phase change composite has been developed by combining polyethylene glycol (PEG2000) binary eutectic, sodium stearate (NaR) micro−/nano-medium, and iron powder as raw materials. The binary eutectic PCM provides the composite with plasticity at room temperature. The addition of an appropriate amount of sodium stearate enhances the dispersibility of high-density iron powder (7.86 g cm −3 ) within the PCM, without altering the intrinsic morphology of the binary eutectic (1.27 g cm −3 ) before or after melting. As a result, the functional composite exhibits several attractive properties, including morphology switchability under external forces, temperature, and magnetic fields, asymmetric transmission of electrical signals in temperature gradients, efficient photo-thermal conversion, and excellent thermal storage performance. This self-prepared functional composite holds great potential for applications in drug delivery, morphology control in confined spaces, temperature management in building materials and electronic components, as well as electrical signal transmission across varying temperatures.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Pengtao Cai,Tong Chen,Mingxiu Zhan,Xiaojun Ma,Masaki Takaoka,Chen Sun,Xiaodong Li
Global concern over per- and polyfluoroalkyl substances (PFASs), especially perfluorooctane sulfonate (PFOS), disposal prompts the search for effective degradation methods. Subcritical water hydrothermal treatment shows promise but suffers from unclear degradation pathways, hindering engineering application design due to unknown intermediate products. This study introduces Fe-based amorphous alloy to enhance the subcritical water hydrothermal degradation of PFOS, achieving a degradation rate of approximately 85 % under optimized conditions of 325 °C and 1 M sodium bicarbonate (NaHCO₃), compared to 56 % without the alloy. Analysis of liquid and gas-phase products, along with identification of potential intermediate products, led to proposing a reaction pathway for Fe-based amorphous alloy-enhanced subcritical water hydrothermal PFOS degradation. Additionally, the distribution of fluorine in PFOS was determined by fluorine-19 nuclear magnetic resonance ( 19 F NMR), and the energy changes of key degradation steps were calculated based on DFT, which provided concrete evidence for the degradation process and verified the mechanism of subcritical hydrothermal degradation of PFOS enhanced by Fe-based amorphous alloys. Most importantly, the Fe-based amorphous alloy demonstrated effectiveness upon repeated use after water washing. These results endorse its potential as a PFOS degradation catalyst.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Longfei Xia,RiSheng Li,Menglin Yao,Xu Deng,Wen Sun,Miaomiao Du
In this study, micron Zero-valent Iron (mZVI), an affordable and well-dispersible reducing agent, was investigated for its potential application in removing Sb(V) from wastewater. Since Sb(V) primarily exists as Sb(OH) 6 - in aqueous solutions, the lower the pH, the more effective mZVI is in removing Sb(V). At a pH level of 3, mZVI (1.0 g/L) was able to remove more than 99 % of Sb(V) (20 mg/L) from the wastewater. The study also compared the influence of cations and anions on mZVI and found that anions had a greater impact on the material's performance. The paper further examined the impact of different heavy metal ions on mZVI and determined that the adsorption capacity of mZVI towards these ions follows the order of their reducing ability. Summarizing the removal mechanism of Sb(V) by mZVI, it was found that both adsorption and redox reactions played crucial roles and Sb(V) is ultimately removed from water through coprecipitation by combining with Fe-O on the mZVI surface. Theoretically, the maximum adsorption capacity of the mZVI material used in this study could reach 21.60 mg/g for Sb(V). This makes mZVI a promising environmental adsorption material and a potential solution for treating water pollution caused by antimony mining.
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ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Fei Hu,Kaihui Liu,Yunyun Zhang,Shuhao Zhao,Tianyi Zhang,Cuiping Yao,Xing Lv,Jing Wang,Xiaolong Liu,Niancai Peng
Infectious diseases, especially respiratory infections, have been significant threats to human health. Therefore, it is essential to develop rapid, portable, and highly sensitive diagnostic methods for their control. Herein, a short-time preamplified, one-pot clustered regularly interspaced short palindromic repeats (CRISPR) nucleic acid detection method (SPOC) is developed by combining the rapid recombinase polymerase amplification (RPA) with CRISPR-Cas12a to reduce the mutual interference and achieve facile and rapid molecular diagnosis. SPOC can reduce the detection time and stably detect up to 1 copy/μL of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA without affecting the detection sensitivity. A highly sensitive one-pot assay integrated with reverse transcription RPA is achieved by wrapping paraffin with a specific melting point on the lyophilized CRISPR reagent surface. A self-heating pack is designed based on thermodynamic principles to melt the paraffin and release CRISPR reagents, enabling low-cost and time-saving detection. Notably, the designed system, coupled with RNA extraction-free technology, can achieve “sample-in-answer-out” detection of the SARS-CoV-2 Orf1ab gene within 22 min using smartphone imaging. The developed assay is validated on 12 clinical samples, and the results 100% correlate with real-time polymerase chain reaction. SPOC is time-saving, is easy to operate, and can eliminate centrifugal and complex hardware devices, satisfying the demand for point-of-care diagnostics in resource-constrained settings.
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Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Pen Luo,Zhengjie Chen,Xiuhua Chen,Wenhui Ma,Xiaowei Gan,Rui Xie
Sulfur in petroleum coke poses significant environmental risks and damages equipment and carbon products, making its removal essential. This study presents a method for the desulfurization and modification of high-sulfur petroleum coke through catalytic roasting with reduced iron powder. The experimental results indicated that with a petroleum coke particle size of 75–58 μm, an iron powder-to-petroleum coke mass ratio of 50 %, and roasting at 1400 °C for 1 h, the desulfurization rate reached 87.93 %, reducing the sulfur content to 0.91 wt%, with a product recovery rate of 80.82 %. A series of characterizations of petroleum coke products before and after desulfurization were conducted, revealing that both the desulfurization efficiency and the graphitization performance of petroleum coke were significantly enhanced by the addition of iron powder. Additionally, density functional theory calculations for the pyrolysis of benzothiophene showed that the energy barrier for the pyrolysis process was reduced in the presence of Fe catalysis, theoretically confirming the desulfurization mechanism. The resulting low-sulfur petroleum coke products can serve as raw materials for graphite preparation.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 39
·16015-16024
·
IF 5.7
Jiawen Hu,Linwen Jiang,Hang Liu,Jiawei Jin,Lei Jia,Anhua Wu,Xiaofeng Zhang
Further enhancing the effective absorption bandwidth (EAB) and the harsh-environment stability of high-entropy alloy (HEA) electromagnetic-wave absorbing (EMA) materials is of great practical significance and broad application prospects. A new type of sulfur (S)-dissolved HEA EMA material was developed in this work. The flaky FeCoNiCuSx (x = 0, 0.05, 0.10, 0.20) HEAs were successfully prepared by a mechanochemical process. The phase structure, magnetic properties, corrosion resistance, oxidation resistance and EMA performances of the FeCoNiCuSx HEAs were investigated in detail and it was found that the introduction of S significantly optimized the impedance matching and achieved excellent EMA performances. The results showed that S10 (FeCoNiCuS0.10) had a minimum reflection loss (RL) of −65.20 dB and a wide EAB of 6.89 GHz. And the S20 (FeCoNiCuS0.20) achieved an ultra-wide EAB of 7.00 GHz and an RL of −55.40 dB in the C-band. In addition, the FeCoNiCuSx HEAs also exhibited excellent corrosion resistance. This work not only demonstrated the potential application of S-dissolved HEAs in the EMA field in harsh environments, but also provided new ideas for optimizing the electromagnetic impedance matching of HEAs.
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ACS Nano
·
2025
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IF 16
Junjie Ding,Wenjun Lv,Hanwen Wang,Weixiao Lin,Wenjun Cui,Wen Zhao,Gustaaf Van Tendeloo,Xiahan Sang
Room-temperature multiferroic BiFeO3 (BFO) is a promising candidate for next-generation memory and spintronic devices, but its synthesis is hindered by metastability and complex phase evolution pathways. Achieving atomic-scale control over these pathways is critical for unlocking BFO’s functional potential. Here, we integrate atomic-resolution scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy and density functional theory to dissect the BFO formation mechanism using annealed Bi/Fe thin-film model systems. We identified the key intermediate phases: Bi-doped α-Fe2O3 and a metastable Aurivillius phase, Bi2FeO6. Our investigation reveals three distinct reaction pathways governed by topochemical constraints: (1) Bi substitution into α-Fe2O3, forming BFO via cation exchange while retaining the oxygen sublattice; (2) Fe incorporation into Bi2O3, driving the layered Bi2FeO6 growth; and (3) transformation of the existing BFO into Bi2FeO6 through Fe out-diffusion and structural rearrangement at the interfaces. These findings provide an atomistic insight into the BFO formation mechanism, demonstrating how topochemical principles and diffusion dynamics dictate the phase evolution.
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JOURNAL OF FOOD BIOCHEMISTRY
·
2025
·Vol. 2025
·期 1
·8616106
·
IF 4.2
Chen Chen,Zengrong Ye,Jianan Li,Na Liu,Bo Wang,Guoying Zhou
Rheum tanguticum petiole juice, widely consumed in Tibet as both a vegetable and an herb, exhibits varying chemical compositions depending on the production methods. This study aims to identify the bioactive components in raw juice using ultra-performance liquid chromatography–quadrupole time-of-flight tandem mass spectrometry (UPLC–QTOF–MS–MS) and analyze their antidiabetic properties through network pharmacology. In addition, the effects of the three types of membrane clarification were evaluated. A total of 36 compounds were identified, and a components–targets–pathways–disease network was constructed for diabetes treatment. Among the membranes tested, the 0.2 μm microfiltration membrane exhibited the highest permeate flux and retained significant amounts of total flavonoids, phenolics, and proanthocyanidins, making it the optimal choice for juice clarification. These findings lay the groundwork for the industrial processing and utilization of R . tanguticum petiole juice in China.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yabin Zhang,Wenguang Zhang,Houxiang Yin,Yanlin Wang,Bingbing Wang,Lishuai Zong,Jinyan Wang,Xigao Jian
The robust human–machine interaction systems of the aerospace industry necessitate the development of thermal resistant wave-transparent composites, with a pivotal focus on organic resin matrix. However, enhancing the heat resistance of such materials while preserving other critical attributes has been a formidable challenge. In this study, a novel designed strategy of a dual-curing functional phosphorus-based phthalonitrile monomer (P-ALK-PN) has been proposed. The optimized curing temperatures for intra- or intermolecular Diels-Alder reactions of alkynyl groups and polyaddition reaction of cyano groups resulted in a homogeneous and highly crosslinked N-enriched phthalonitrile system. After curing at 450 °C, the resin, namely P-ALK-PN-450 °C, demonstrated exceptional thermal stability ( T 5% = 644 °C), thermo-oxidative stability ( T 5% = 554 °C), and char yield at 800 °C (90.7 % in N 2 and 67.5 % in air). Their quartz fiber reinforced composites (P-ALK-PN/QFs) were subsequently fabricated by the hot-pressing process. Upon post-curing at 420 °C, P-ALK-PN-420 °C/QF displayed elevated glass transition temperature (550 °C), flexural strength (319 MPa), and relatively low dielectric properties with a dielectric constant (D k ) of approximately 4.2 and a dissipation factor (D f ) less than 0.02 across a wide temperature ranging from 25 °C to 600 °C. Especially, it exhibited excellent flame retardancy (only a 6.7 % weight loss at ambient temperatures exceeding 1300 °C for 200 s) as well, stemming from release of eco-friendly inert gases (NH 3 ) and formation of a graphitized protective layer during pyrolysis. These promising results highlight the potential applications of P-ALK-PN resins in aerospace and high-performance engineering fields.
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BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Anqi Wang,Zishu Zheng,Jun Hou,Xiaozhi Wang,Jun Wu
Zero-valent iron (ZVI) has been widely used in Fenton-like reactions but is easily passivated during pollutant degradation. Lactobacillus acidophilus (a type of lactic acid bacteria (LAB)) is capable of producing lactic acid (LA) and H 2 O 2 under anoxic and oxic conditions, respectively. Thus, it inspires us to build a green recycling system that couples LAB with ZVI (LAB-ZVI) to degrade p-Nitrophenol (p-NP) in an alternated anoxic–oxic system. LAB significantly improve the reactivity of ZVI and achieves long-term stable removal of p-NP. In the anoxic environment, p-NP is reduced to p-Aminophenol (p-AP) by LAB-ZVI, and p-AP is subsequently degraded into smaller molecular structures. The complexation between LA and Fe(Ⅱ/Ⅲ) not only creates a potential difference (ψ) to facilitate the formation of reactive oxygen species (ROS) but also reduces intracellular ROS in LAB. ZVI promotes extracellular production of •OH but extracellular ROS attack does not necessarily lead to cell death. ZVI enhances the secretion of supernatant fluid, thereby improving the •OH scavenging ability of LAB. Additionally, ZVI positively affects the activity of several antioxidant enzymes through the release of Fe(Ⅱ/Ⅲ). Moreover, extracellular polymeric substances (EPS) can slow down the oxidation process by regulating antioxidant enzymes. Overall, this study provides an environmentally friendly scientific guidance for the application of ZVI.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Nan Li,Haibo Liu,Bin Yang,Bo Xie,Yangtao Wu,Lingjun Bu,Shiqing Zhou
This study establishes a manganese-activated ferrate (Mn(II)/Fe(VI)) process for autonomous Microcystis aeruginosa removal, addressing the critical challenge of additive dependency and secondary pollution in conventional algal control strategies. System performance was critically governed by Mn/Fe stoichiometric ratios and total oxidant dosages, with near-complete algal elimination (>98 %) achieved at Mn/Fe = 1:1 (≥200 μM total dosage) while maintaining cell integrity. TOC analysis revealed dosage-dependent control over cellular lysis and intracellular organic matter (IOM) releasing. Spectroscopic characterization demonstrated process efficacy in degrading dissolved organics through decreased UV 254 absorbance (unsaturation reduction), declining SUVA (aromaticity loss), and elevated E2/E3 ratios (molecular weight reduction). Comparative analyses identified dissolved organic carbon as a more sensitive cellular stress indicator than K + release, attributed to MnO 2 adsorptive sequestration of released intracellular constituents. Mechanistic investigations revealed dual role of Mn(II) that rapid surface accumulation provided oxidative protection, while subsequent Fe(VI)-driven MnO x formation enabled floc growth through particle bridging. Water matrix effects followed valence-specific modulation, where divalent cations (Ca 2+ /Mg 2+ ) enhanced removal via charge screening, and excessive monovalent ions (Na + /NH 4 + ) impaired efficiency through ionic strength interference. This work pioneers a green oxidation-coagulation synergy that eliminates supplemental additives, offering a sustainable paradigm for mitigating cell rupture and IOM release in algae-laden water treatment.
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INTERMETALLICS
·
2025
·
IF 4.8
Liangcai Du,Xiaoqing Liu,Qianqian Kong,Lichao Gong,Zhenhua Yao
Understanding the intricate phase transformations and their impact on the mechanical properties holds paramount importance in developing high entropy alloys (HEAs) with ideal properties, yet it remains challenging and underexplored. In this study, a series of novel CrFeMnNi (2-x) Ti x (x = 0, 0.5, 1, and 1.5 at.%) HEAs were meticulously designed based on the established Valence Electron Concentration (VEC) rule, with the VEC values systematically varied as the atomic composition (Ni, Ti) changed. The microstructure, phase transformation behavior, mechanical properties, and strengthening mechanisms were systematically investigated. We found that the HEA powders exhibited phase behavior consistent with the VEC rules. The spark plasma sintered (SPSed) HEA bulk samples exhibited a phase transformation attributed to the precipitation of Cr and Mn within the matrix, resulting in the formation of the σ phase. Quantitative calculation of the strengthening mechanisms revealed that grain boundary strengthening and precipitation strengthening were the primary contributors to the high strength of the HEA bulk samples. These findings not only advance the utilization of the VEC rules in HEA material design but also contribute to the understanding of the phase behavior and mechanical properties of HEAs, facilitating the design of high performance HEAs.
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