JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yuanxi Guo,Xinxin Zhang,Hehe Wei,Hai-tao Yu,Ying Xie
High-entropy oxides (HEOs) exhibit excellent structural stability, and the synergistic effects among their constituent elements contribute to performance enhancement, providing vast opportunities for designing novel and efficient electrocatalysts. Utilizing four common transition metals such as Fe, Co, Ni, and Cr as the base and introducing a fifth metal, M (M = Mg, Mn, Zn, and Cu), with different outer electron shells, relevant high-entropy oxides with varying sizes were successfully synthesized via the hydrothermal method. Among all considered samples, FCNCMg, with the smallest particle size, possessed a much larger specific surface area, leading to the exposure of more active sites and thus favoring an improvement of the OER performance. The introduction of the fifth metal induced a redistribution of charges among Fe, Co, Ni, and Cr within the catalyst, resulting in different oxidation states for these metals. Mg addition led the XPS peaks of Fe/Ni and Cr/Co elements to shift towards lower and higher binding energies, respectively. This dynamic compensation effect between metal ions synergistically promoted their OER performance. In alkaline environments, FCNCMg exhibited the best OER performance, with an overpotential of 278 mV at 10 mA cm −2 and a Tafel slope of 49.90 mV dec −1 . Moreover, it demonstrated excellent stability, achieving 50 h at 10 mA cm −2 and 20 h at 50 mA cm −2 . This study, by controlling the composition of HEOs, explored the impact of particle size and synergistic effects on their performance, offering new insights for design and optimization of relevant high-performance HEOs.
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高影响因子
TALANTA
·
2024
·
IF 5.6
Shanshan Zhou,Jialin Li,Jun Zeng,Yuewen Huang,Bin Wang
This study developed a novel organic-inorganic hybrid composite, shortly as GO-PEG-LDHs, by self-assembly of exfoliated Mg–Al layer double hydroxide (LDHs) on the polyethylene glycol (PEG) grafted graphene oxide (GO) to achieve the selective adsorption of hemoglobin (Hb). The prepared GO-PEG-LDHs has a hierarchical structure with a homogeneous loading of exfoliated LDHs nano-sheets on its surface. The adsorption test reveals that GO-PEG-LDHs exhibits an adsorption efficiency of 95.03% for Hb and 3.45% for bovine serum albumin (BSA). The adsorption of Hb follows the Langmuir model, with an ultrahigh adsorption capacity of 55248.6 mg/g, which is higher than any previously reported materials. Meanwhile, the adsorbed Hb can be efficiently recovered through elution with a 50 mM Tris-HCl buffer, with an elution efficiency of 80.77%. Circular dichroism (CD) spectra indicate no conformational change for Hb during the process of adsorption/desorption. Furthermore, the composite demonstrates the ability to selectively isolate Hb in the presence of interfering protein BSA, indicating its potential for practical applications.
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高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Chang Su,Guoqiang Liu,Qiang Sun,Lei Wen,Zeyu Chen,Meiju Zhao
The series P2-type Mn–Fe-based layered oxide materials (Na2/3MnxFe1–xO2) for sodium-ion batteries are regarded as potential commercial cathode materials due to their high specific capacity and low cost. However, the P2-type layered oxide cannot avoid some phase transformation during the charge–discharge process, which results in poor structural reversibility and low-capacity retention. Moreover, a high capacity usually means more insertion/extraction of Na+, which results in large changes in the lattice volume and poor cycling stability. Herein, a new strategy containing oxygen vacancies and Mg substitution is designed to obtain high-performance sodium storage of Mn–Fe-based layered oxide. The P′2-type Na0.67Mn0.85Fe0.1Mg0.05O2−δ (Ovs & Mg-sub) cathode material is synthesized by the above-mentioned dual-modification strategy. The effect of oxygen vacancies and Mg substitution on the structural evolution during the charge–discharge process is further investigated by in situ X-ray diffraction techniques. It demonstrates that Ovs & Mg-sub has reversible structural transformation and smaller lattice volume changes, thus further exhibiting prominent electrochemical properties. The initial discharge specific capacity reaches 190.2 mAh g–1 at a current density of 20 mA g–1 and remains at 152.9 mAh g–1 at a current density of 100 mA g–1 after 100 cycles. In addition, it has a superior rate capability of 88.9 mAh g–1 at a current density of 2000 mA g–1.
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Nanomaterials
·
2018
·Vol. 8
·期 2
·113
·
IF 3.504
Lijun Wang,Yusen Wang,Xiaoxia Wang,Xiaolan Feng,Xiao Ye,Jie Fu
Layered double hydroxides (LDHs) have been widely used as an important subset of solid base catalysts. However, developing low-cost, small-sized LDH nanoparticles with enhanced surface catalytic sites remains a challenge. In this work, silica aerogel (SA)-supported, small-sized Mg–Al LDH nanosheets were successfully prepared by one-pot coprecipitation of Mg and Al ions in an alkaline suspension of crushed silica aerogel. The supported LDH nanosheets were uniformly dispersed in the SA substrate with the smallest average radial diameter of 19.2 nm and the thinnest average thickness of 3.2 nm, both dimensions being significantly less than those of the vast majority of LDH nanoparticles reported. The SA/LDH composites also showed large pore volume (up to 1.3 cm3·g) and pore diameter (>9 nm), and therefore allow efficient access of reactants to the edge catalytic sites of LDH nanosheets. In a base-catalyzed Henry reaction of benzaldehyde with nitromethane, the SA/LDH catalysts showed high reactant conversions and favorable stability in 6 successive cycles of reactions. The low cost of the SA carrier and LDH precursors, easy preparation method, and excellent catalytic properties make these SA/LDH composites a competitive example of solid-base catalysts.Keywords:layered double hydroxides;nanocatalysts;mesoporous silica;support;solid base
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuan Zeng,Yuanyuan Wang,Linyao Ke,Qiuhao Wu,Xiaojie Tian,Liangliang Fan,Kirk Cobb,Yuhuan Liu,Roger Ruan,Yunpu Wang
The pyrolysis of metal soaps to produce hydrocarbon rich fuel has been studied extensively. However, the combined effects of microwave radiation and metal ion types on hydrocarbon production have not been addressed. In this study, the microwave and conventional pyrolysis experiments were conducted on five metal soaps (Li soap, Na soap, K soap, Ca soap, Mg soap). The results demonstrated that the metal ions at the carboxyl end of the soap enhanced the polarity of the reactants, leading to a rapid increase in temperature under microwave conditions. With the ion radius increasing, the heating rate increased gradually. Compared with conventional pyrolysis, microwave pyrolysis exhibited a more rapid heating rate, a higher degree of carbon chain fracture, and a greater abundance of small olefin compounds, which promoted aromatization reaction and the release of CO, H 2 and CH 4 . In addition, the composition of the pyrolysis products derived from different metal soaps is affected by the characteristics of metal ions. As the radius of metal ions increased, the oxygen content in the liquid products decreased gradually, while the carbon content increased. The strengthening effect of microwave was further analyzed. With the increase in the radius of metal ions, the strengthening effect of microwaves on olefins formation was gradually weakened, while the inhibiting effect on alkanes formation was gradually enhanced. The structure of carboxylate network is affected by the radius of metal ions, which results in the regular change of the strengthening effect of microwave on olefins and other products. This study is highly significant in guiding the pyrolysis of soapstock waste to prepare olefins and alkanes with high efficiency and low energy consumption.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Luhui Zhang,Jiajia Fan,Lin Ding,Peng Zhang,Jiandong Ye,Teliang Lu
Rapid induction of angiogenesis is crucial for the treatment of large bone defects and accelerating the material-mediated bone defect repair process. In this study, we employed a negative pressure infiltration method to coat the surface of porous BCP scaffolds with dopamine-modified hyaluronic acid (HA-DA) hydrogel and magnesium-doped calcium silicate (Mg-CS). In vitro results demonstrated that HA-DA hydrogel coating with an appropriate degree of dopamine grafting significantly improved the in vitro angiogenic activity of BCP scaffolds without affecting their osteogenic activity. The Mg-CS coating, heat-treated to ensure good combination with the BCP matrix, could sustainably release angiogenic silicon ions and osteogenic magnesium ions. Results from rat cranial defect repair showed that the implanted BCP@HA-DA-2 and BCP@10 Mg-CS scaffolds further accelerated the occurrence and development of neovascularization at the defect site, facilitating new bone formation. Among them, BCP@10 Mg-CS scaffold exhibited the best bone defect repair effect and has the potential for clinical application.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenliang Zhang,Shuyi Li,Dongsong Wei,Yafei Shi,Ting Lu,Zhen Zhang,Zhiwu Han,Yan Liu
Poor corrosion resistance limits the application of Mg alloy and it is meaningful to explore a surface coating technology for ultra-long-term corrosion protection of Mg alloy. Superhydrophobic surface (SHS) and smooth liquid-injected porous surface (SLIPS) have shown important application value in the field of Mg alloy corrosion protection. However, the unstable special interface of air layer or lubricant cannot act as stable corrosion barrier for the long term. Inspired by frog skin, a bionic fluorine-free multifunctional slippery coating (MSC) is prepared by one-step spraying a mixture of epoxy resin, silicone oil, modified nano TiO 2 and modified micron mica powder. MSC exhibits a microstructure similar to frog skin, excellent slippery (sliding angle ∼ 3°) and strong lubricant retention. Different from anticorrosion mechanism of SHS and SLIPS by their special interface, MSC, storing silicone oil on the surface and inside the coating, demonstrates ultra-long-term anticorrosion to Mg alloy (both neutral salt spray and 3.5 wt% NaCl solution immersion for 60 days) due to excellent barrier effect throughout coating, and the scratch defect area of MSC is not significantly eroded after 14 days of salt spray. Moreover, MSC exhibits excellent static/dynamic anti-icing ability and low ice adhesion in a −20℃ environment, outstanding adhesion (level 4B), high hardness (3H), antibacterial (>94 %), antifouling, chemical stability and resistance to boiling water, ice water and UV radiation. All these excellent properties can promote the application of Mg alloy in a wider range of fields.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayu Feng,Ruoxu Liu,Xuejin Yang,Shuo Cui,Rui Cao,Ping Ning,Fang Wang,Zibin Pan,Lijuan Jia
Efficient removal of the highly toxic gas phosphine (PH 3 ) from various exhaust gases is a major challenge. To address this, we developed a cost-effective NiO/TiO 2 adsorbent (Ni X /TiO 2 ) via facile impregnation, achieving efficient anaerobic PH 3 removal at a low temperature (350 °C) with an exceptional breakthrough capacity of 232.23 mg(PH 3 ) g −1 . Characterization revealed that superior performance stems from abundant surface basic sites, developed porosity, and strong NiO-TiO 2 interfacial interactions promoting PH 3 adsorption and dissociation. During PH 3 capture, phosphorus incorporation transforms active NiO into Ni 2 P species, leading to adsorbent deactivation. Crucially, recognizing the photocatalytic potential of both TiO 2 and Ni 2 P, we repurposed the spent adsorbent as a Ni 2 P/TiO 2 heterojunction photocatalyst. Proof-of-concept experiments demonstrated its high efficacy in visible-light-driven wastewater treatment, achieving 91 % degradation of malachite green (MG). This work advances PH 3 purification technology while establishing a sustainable circular economy strategy via repurposing deactivated adsorbents into photocatalysts, aligning with resource conservation and recycling.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Haoran Jiang,Yong Hu,Wu Xu,Ziwen Dong,Song Kong
Cellulose-based paper, widely used in cultural heritage preservation and art, suffers from inherent flammability. Conventional phosphorus-based flame retardants, derived from depleting phosphate ores, necessitate sustainable alternatives. This study introduces an innovative layer-by-layer assembly strategy to fabricate biomass-derived MH-P@Mn and MH-P@Ni core-shell flame retardants. Phytic acid, a biogenic phosphorus source, chelates metal ions (Mn 2+ /Ni 2+ ) to form stable coatings on magnesium hydroxide. When applied to cellulose paper, these materials exhibit superior flame-retardant performance compared to commercial phosphorus-based counterparts, particularly at medium-to-high loadings. Mechanistically, they enhance inert gas emission during pyrolysis, delaying thermal degradation. The mild, rapid synthesis enables development of eco-friendly, multifunctional cellulose paper with enhanced fire resistance and sustainable phosphorus utilization, promising diverse applications.
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高影响因子
CORROSION SCIENCE
·
2025
·
IF 8.5
Muhammad Mubeen,Mubashar Mahmood,Mohammad Tabish,Yiqian Lv,Salman Khalid,Wanling Wang,Muhammad Jawad,Jingmao Zhao,Baomin Fan,Ghulam Yasin
Zn-Al-Mg-coated steel (ZM-steel) confronts significant considerable challenges from over-film degradation and under-film metallic dissolution, compromising its durability under extreme weathering conditions. This research presented an intelligent coating system incorporating guanine-loaded melamine resin spheres (Gua-MRS) hybridized with MoS 2 nanosheets, engineered to deliver functional corrosion protection for ZM-steel. Gua-MRS@MoS 2 nanohybrid offered a dual-functional approach: MRS@MoS 2 provided robust electrochemical shielding and barrier properties within epoxy matrix, while corrosion-triggered release of guanine - at low pH and/or in NaCl environment imparted exceptional self-healing capabilities. This process formed a uniform precipitation film over ZM-steel surface, effectively combating aggressive corrosive species. The integration of this hierarchical heterostructure not only enhanced structural integrity but also improved the coating's corrosion resistance and thermal stability. These advancements position the coating as an innovative and sustainable solution for engineering applications in the automotive and marine industries. The intercomponent synergy of Gua-MRS@MoS 2 system opens new pathways for the development of high-performance, eco-friendly coatings.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 10
·1-14
·
IF 2.8
Sun Yue,Sun Ruijin,Wang Wenxu,Wang Mengmeng,Li Weidong,Wen Pengcong,Zhang Dongyun
The complex phase transition of O3-type NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) during charge/discharge process results in limited cycling stability and rate performance, significantly impeding its application in sodium-ion batteries. In this study, a series of NaNi 1/3-x Fe 1/3 Mn 1/3 Mg x O 2 ( x = 0, 0.03, 0.05) samples with varying concentrations of Mg substitution were synthesized using the solid-state method. The impact of Mg substitution on the crystal structure and the element ratio were investigated by XRD and ICP. It was found that Mg substitution not only reduces the content of Mn 3+ to suppress the Jahn–Teller effect in the material but also broadens the voltage range (from 3.3 V → 4.0 V → 2.74 V) of the pure P3 phase compared to the NFM (from 3.48 V → 4.0 V → 2.85 V), which significantly improve cycling performance. In addition, the DFT calculations indicate that the bandgap reduction and the electronic conductivity enhancement occur after Mg substitution, which results in significant improvement in rate performance. After 200 cycles at 1C, the NFM-Mg0.03 sample maintained a discharge-specific capacity as high as 104 mAhg −1 with a capacity retention rate reaching up to 87.5%. The discharge-specific capacity increases from 99.7 mAhg −1 (NFM) to 114.5 mAhg −1 (NFM-Mg0.03) at 2 C. Therefore, Mg substitution effectively improves the electrochemical performance and shows great potential for large-scale energy storage applications.
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POLYMER COMPOSITES
·
2025
·
IF 4.7
Heping Zhang,Wenpu Zhang,Mingwei Hu,Yiqi Tang,Gongcheng Xu,Xinghui Hou,Ying Zhou
Ethylene Vinyl Acetate (EVA) has been widely used in various industries for its excellent flexibility and corrosion resistance. However, its high flammability poses significant safety risks, necessitating the incorporation of flame-retardants to improve its fire resistance. This study focuses on the wet surface modification of magnesium hydroxide (MH) using n-octyl triethoxysilane (OTES). The hydrolysis products of OTES react with the OH on the MH surface to form Si O Mg bonds, thereby enhancing the surface hydrophobicity and compatibility with EVA. MMH was incorporated into EVA, and the resulting composites were characterized using XRD, SEM, TG, BET, FT-IR, and XPS. The optimal modification conditions were achieved with an OTES dosage of 3 wt% at 45 °C for 60 min, yielding a contact angle of 142°, an activation index of 98.12%, and an oil absorption rate of 43 mL/100 g. The EVA/MMH composites demonstrated superior thermal stability and flame retardancy compared to unmodified EVA. Specifically, the limiting oxygen index (LOI) of EVA/MMH-55 reached 34.9%, and it achieved a UL-94 V-0 rating, indicating excellent self-extinguishing properties. This study provides a novel approach for the surface modification of MH, offering a practical solution to enhance the flame retardancy and thermal stability of EVA composites. Highlights Hydrophobic MMH is obtained by wet surface coating modification of MH by OTES. Contact angle of MMH is 142° under optimal modification conditions (60 min, 45 °C and 3 wt%) The chemical reaction process between OTES and the MH surface has been analyzed, revealing the mechanism by which the Si OH groups on OTES react with the OH groups on the MH surface to form Si O Mg bonds, which intertwine to form a hydrophobic layer. The specific surface area of MMH is reduced, and it has good compatibility with EVA resin. The LOI of EVA/MMH-55 is 34.9%, making it a nonflammable material.
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