MINERALS ENGINEERING
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2025
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IF 5
Qiuyue Sheng,Zhen Li,Wenjing Feng,Yuxuan Yang,Zhanglei Zhu,Ningning Zhang,Wanzhong Yin
As one of the main copper oxide minerals, the strong surface hydrophilicity induces the low recovery of malachite and decreases the utilization efficiency of copper metal. In this work, the interface hydration structure of malachite and regulation mechanism by bis(2-ethylhexyl)phosphate (D2EHPA) were revealed via density functional theory (DFT) calculations, molecular dynamics (MD) simulations, X-ray photoelectron spectroscopy (XPS) analysis, contact angle and Zeta potential measurements. Flotation tests and contact angle measurements showed that D2EHPA exhibited excellent concentration selectivity for malachite against muscovite and quartz, enhanced the malachite recovery to 90.65 % with the dosage of 50 mg/L at pH 7.0, and the contact angle of malachite increased from 23.0° to 111°. Zeta potential analysis confirmed the selective adsorption of D2EHPA on malachite surface, electrostatic attraction occurred between D2EHPA and malachite surface when pH < 8.0. XPS analysis and DFT calculations further confirmed the adsorption of D2EHPA on malachite surface. Moreover, the adsorption of D2EHPA mainly via the chemical bonding between O1 (P=O), O2 (P-OH) and the Cu on malachite surface. MD simulations revealed that the average D2EHPA molecule interaction energy with malachite (−2 0 1) surface was −36.522 kJ/mol, increased the interaction energy of H 2 O on malachite (−2 0 1) surface from −1.293 kJ/mol to −0.824 kJ/mol, decreased the number density of H 2 O molecule towards malachite (−2 0 1) surface from 0.18 Å -3 to 0.12 Å -3 , induced hydrophobicity of malachite surface.
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高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Liwen Fu,Fen Jiao,Qian Wei,Zheyi Zhang,Pan Gong,Chenyu Fan,Tao Wei
In the present investigation, ethyl xanthate (SEX) was initially utilized as a collector, revealing a marked decrease in the flotation recovery of pyrrhotite attributable to surface coverage by serpentine slimes. To overcome this challenge, three polystyrene nanoparticle collectors—namely PS, PS-VI, and PS-MVT—were synthesized through emulsion polymerization. Flotation experiments demonstrated that all three nanoparticle effectively mitigated the detrimental impact of serpentine coating on pyrrhotite flotation, with PS-VI exhibiting the most pronounced performance. Subsequent analyses involving adsorption capacity measurements, scanning electron microscopy (SEM), and fourier transform infrared spectroscopy (FT-IR) were conducted to elucidate the adsorption behavior of PS-VI on pyrrhotite surfaces. Findings indicated that, in the presence of serpentine coatings, the positively charged PS-VI nanoparticles diminished the extent of serpentine coverage and adsorbed within the interstices of the serpentine layer via a combination of electrostatic and chemical adsorption mechanisms. Bubble collision experiment shown that this adsorption behavior facilitated the formation of the three-phase contact line (TPCL) on pyrrhotite surfaces, thereby enhancing the recovery of pyrrhotite compromised by serpentine coatings while concurrently reducing the entrainment of serpentine.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Ziwen Shi,Ciyang Zhang,Jiayi Shan,Fei Ying,Keren Lu,Qingli Hao,Mingzhu Xia,Xifeng Xia,Wu Lei
Considering the massive damage and substantial economic losses caused by metal corrosion, it is extremely urgent for researchers to develop more high-performance anti-corrosion coatings. Herein, an intelligent anti-corrosion epoxy coating system integrating active protection and fluorescence self-monitoring capabilities has been developed. This system utilizes mussel-inspired boron nitride nanosheets (BNNS) as multifunctional nanocontainers loaded with rhodamine hydrazide (R1) fluorescent probes. The mesoporous polydopamine (mPDA) modification improves the dispersibility of BNNS, and the prepared nanocontainer on this basis combines the excellent barrier performance of BNNS itself and the corrosion inhibition effect of mPDA and R1, enhancing the long-term anti-corrosion performance of the coatings. EIS test demonstrated that after 60 days of immersion in a 3.5 wt% NaCl solution, the BNNS-mPDA@R1 coating exhibited an impedance modulus of 7.75 × 10 10 Ω·cm 2 . Furthermore, the R1 probe generates a fluorescence signal by capturing the iron ions generated during early corrosion, enabling in situ self-detection of corrosion. The chelation-enhanced fluorescence(CHEF) mechanism of R1 for iron ions was verified through solid/liquid fluorescence spectra and quantum efficiency tests, demonstrating that R1 exhibits outstanding fluorescence-based self-monitoring capabilities, enabling in situ visualization and early-stage warning of coating degradation. In summary, this study provides novel insights into the design of multifunctional epoxy coatings that simultaneously achieve corrosion protection and self-warning, effectively promoting the development of the multifunctional coatings.
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高影响因子
MINERALS ENGINEERING
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2025
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IF 5
Xiaoju Li,Junxia Yu,Peng hui Zhang,Xue fen Liu,Yun Wu,Zhenyue Zhang,Xiaodi Li,Chunqiao Xiao,Ruan Chi
In-situ leaching with (NH 4 ) 2 SO 4 is widely employed for rare earth the separation and extraction, yet residual ammonium salts readily adsorb onto clay minerals and are prone to elution, threatening aquatic systems. Conventional ammonium removal induces clay swelling upon water absorption, resulting in poor ore permeability and slope instability. This study investigates a K/Mg/Na ternary compound eluent designed to suppress tailings expansion during ammonium removal and clarifies its inhibitory mechanism. Compared with single or binary eluents, the ternary formulation exhibited superior ammonium removal, and the optimized composition (0.1 mol/L, ratio 5:6:4) markedly improved ore body stability. The eluent reduced the zeta potential of clay minerals from −13.2 mV to nearly 0 mV, thereby diminishing electrostatic repulsion. Under identical conditions, tailings treated with the compound exhibited 61.3 % less expansion than untreated controls or samples exposed to conventional leaching agents. Mechanistic analysis indicates that the ternary eluent neutralizes surface charges, compresses the electric double layer, and mitigates inter-crystalline repulsion within clay minerals, stabilizing hydration and suppressing expansion. This approach improves the ammonium leaching efficiency, mitigates environmental risks, and strengthens mining safety.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Chencheng Lv,Xiaoye Bi,Yunpeng Wang,Dong Xue,Zexiong Li,Tianyang Li,Tao Zhao
Superhydrophobic textiles attract significant interest for diverse applications. However, silane coupling agents and polydimethylsiloxane utilized in hydrophobic textiles exhibit limited applicability, poor hand feel, inadequate moisture and air permeability, along with environmental and health concerns. To broaden the applicability and enhance the safety of hydrophobic agents, this work synthesizes Alkyl bis(diaryl)diazomethanes. Upon thermal activation, the bis(diaryl)diazene groups generate highly reactive carbene intermediates that react with X-H bonds (X = C, O, N) in cotton, polymer and silk fibers to form stable C-X bonds (X = C, O, N), resulting in a hydrophobic coating on the fiber surface. Concurrently, the dual-carbene design increases reactive sites on the fiber surface, enhancing binding affinity. The introduction of long-chain alkyl groups replaces fluorine-containing and silicon-containing groups to reduce the fiber surface energy. Furthermore, Alkyl bis(diaryl)diazomethane is observed to undergo agglomeration during processing and self-crosslink into nanostructures on the fiber surface, consequently enhancing the roughness of the hydrophobic coatings on the fiber surface. The modified fabrics exhibited water contact angles (WCA) >150° and sliding angles (SA) <10°, confirming superhydrophobic. While retaining the original hand feel, moisture and air permeability, the modified fabrics exhibited exceptional soap washing fastness, rubbing resistance, chemical stability, superior anti-fouling properties, and self-cleaning functionality, along with enhanced mechanical properties. This modification strategy exhibits substantial market potential in the hydrophobic textiles sector.
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Haoyuan Fan,Jie Cheng,Ru Bai,Ning Li,Li Wang
Conventional self-healing anti-corrosion coatings face limitations in corrosion inhibitor release kinetics, triggering conditions, and inhibition efficiency, which compromise their protective effectiveness for magnesium alloys. In this study, we developed a novel dual-functional PEO/EP@PIN composite coating with salt-responsive self-healing properties. The coating system innovatively combines a plasma electrolytic oxidation (PEO) interlayer with an epoxy (EP) topcoat embedded with polyaniline (PANI) microcapsules containing 1-decyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (IN) ionic liquid corrosion inhibitor. The PANI microcapsules enable rapid Na + -triggered inhibitor release in high-salinity environments, while the PEO layer ensures robust interfacial adhesion to the Mg substrate. Electrochemical tests demonstrated that the coating achieves an ultralow corrosion current density of 6.26 × 10 −11 A·cm −2 , representing a 7-order-of-magnitude reduction compared to bare Mg alloy, while maintaining a high impedance modulus of 8.97 Ω·cm 2 after 30 days of immersion in 5.0 wt% NaCl solution. Scratch-healing experiments and XPS analysis revealed that the released IN inhibitor forms Mg-N/S chemical bonds with the substrate and generates hydrolyzed Mg(OH)₂ barrier phases, effectively blocking corrosive media penetration. This work elucidates the salt-responsive and self-healing mechanisms of the coating, providing new insights for developing smart anti-corrosion coatings for magnesium alloys.
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Wei Zhang,Lianfeng Wu,Shuxue Zhou
MXenes have attracted significant attention due to their unique properties, including antibacterial property and electrical conductivity. However, the antibacterial performance of MXenes-based coatings strongly depends on their superficial distribution. In this study, Ti 3 C 2 nanosheets were modified with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium (QAS) and further incorporated into waterborne epoxy coatings. Influence of modifier ratio on the distribution of QAS-modified Ti 3 C 2 nanosheets (Q-Ti 3 C 2 ) in coatings as well as on the antibacterial/antistatic performance of coatings was investigated. Appropriate amount of QAS (i.e., 10 %) for modification was critical to achieve high antibacterial performance at low content of Ti 3 C 2 nanosheets. The Q-Ti 3 C 2 embedded coating could get 99.4 % inhibition against E. coil and 100 % against S. aureus at 0.5 wt% loading. In contrast, the coating with unmodified Ti 3 C 2 only exhibited antibacterial rate of 85.3 % and 87.4 % for E. coil and S. aureus , respectively. The prominent antibacterial performance of Q-Ti 3 C 2 based coatings mainly results from the enriched residence of Ti 3 C 2 nanosheets at the upper layer of coatings and partially from the intrinsic antibacterial property of QAS. Additionally, the superficial distribution of Ti 3 C 2 nanosheets endowed the coatings with low surface resistance of 1.8 × 10 9 Ω, thereby conferring antistatic properties, and hence, facilitating antibacterial durability, even if the coating contains as low as 1 wt% Q-Ti 3 C 2 nanosheets. The nanocomposite coatings also exhibited better adhesion and high pencil hardness.
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高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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2025
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IF 5.8
Dahao Ji,Abdulaziz Alasiri,Yuefeng Zhang,Xiong Zheng
To overcome the critical limitations of conventional phase change composites (PCCs)—including low thermal anisotropy, phase change material (PCM) leakage, and inefficient photo-thermal conversion—we develop a hierarchically engineered PCC by integrating chitosan (CS) aerogel, unidirectionally aligned carbon fibers (CFs), and polyethylene glycol (PEG2000). The CS aerogel matrix suppresses PEG leakage via hydrogen-bonding networks while enabling directional CF alignment, achieving record axial thermal conductivity (6.61 W·m⁻¹·K⁻¹) and exceptional anisotropy (ratio: 11.9). Despite reduced PEG loading with CF content, the composites retain high latent heat (136.6 kJ·kg⁻¹ at 15 wt% CFs) and mechanical robustness. The aligned CF network synergistically enhances broadband solar absorption and directional heat transfer, enabling ultrahigh solar-thermal efficiency (98.5 % at 3.0 sun irradiation). Remarkably, the system exhibits excellent cyclic stability and outdoor operational reliability. This work establishes a scalable paradigm for sustainable thermal energy storage by concurrently resolving the trade-offs among PCM encapsulation, anisotropic thermal management, and photo-thermal conversion.
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高影响因子
FUEL
·
2025
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IF 7.5
Wenji Liang,Junwei Shi,Zhenhua Qin,Jinguang Cai,Yun He,Jianfen Li
Exploring efficient and durable non-noble metal catalysts toward oxygen reduction/evolution reaction (ORR/OER) is of practical significance in advancing Zn-air batteries. Herein, we introduce a three-dimensional (3D) bifunctional electrocatalyst (Fe/Ni@NSC) consisting of N, S-dual doped mesoporous carbon nanosheets/carbon nanotubes embedded with abundant FeS/FeNi nanoparticles and Fe/Ni-N x sites by integrating rod-like ZIF-L@S-g-C 3 N 4 with Fe/Ni-phen complex and subsequent pyrolysis. The 3D structure not only offers a high surface area for active sites but also accelerates O 2 transport/charge transfer. Leveraging the synergistic effect of the 3D porous carbon network and multiple active sites, Fe/Ni@NSC exhibited outstanding activities in both ORR (half-wave potential, 0.868 V) and OER (overpotential, 317 mV at 10 mA cm −2 ), indicating a low potential gap of 0.679 V, outperforming the Pt/C + RuO 2 benchmarks (0.695 V). The Zn-air batteries based on Fe/Ni@NSC achieved a promising open circuit voltage (1.47 V), peak power density (172.59 mW cm −2 ), as well as long-term cycling stability (370 h). Furthermore, density functional theory (DFT) calculations also demonstrated that the interfacial electronic interaction between FeS and FeNi effectively boosted the bifunctional catalytic performance for ORR/OER. This study lays the foundation for designing low-cost and efficient 3D structure non-noble metal catalysts for more energy conversion and storage devices.
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DOI
高影响因子
FUEL
·
2025
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IF 7.5
Yang Zheng,Wei Su,Hualong Zhou,Jiaqing Wang,Wenbo Zhang,Yi Xing
To address the problems of difficult degradation of Chlorinated volatile organic compounds (CVOCs) and easy deactivation of catalysts by chlorine poisoning, o-Dichlorobenzene ( o- DCB) was used as a model pollutant, and a shape size-tunable CeCoOx catalyst was designed by Prussian blue analogue (PBA) derivatization, and the nucleation rate of the precursor was controlled by regulating the amount of Polyvinyl pyrrolidone (PVP) added (0–15 g), so that the CC-PVP y catalysts with hexagonal bipyramidal to lamellar gradient structures were successfully prepared, and their structure-efficacy relationship and mechanism were systematically elucidated. The results showed that the appropriate amount of PVP could optimize the crystallinity and size uniformity of the precursor, and the resulting CC-PVP 1 catalyst showed a complete hexagonal bipyramidal structure with maximum specific surface area and pore volume, and the surface was enriched with highly active Co 3+ species and adsorbed oxygen. Mechanistic studies have shown that chlorine poisoning mainly occurs through Cl - occupying the oxygen vacancies, leading to a decrease in the crystallinity of the catalyst, a collapse of the pore structure, a weakening of the redox capacity and a decrease in the number of acid sites. CC-PVP 1 significantly delayed the deactivation by reducing the amount of Cl deposited on the catalyst surface due to its high structural integrity. This study deepens the understanding of the catalytic combustion mechanism of CVOCs and provides a feasible strategy for the development of efficient chlorine-resistant catalysts.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Yichong Song,Yuheng Zhang,Zengkun Li,Junlei Wang,Zhonglin Du,Yao Wang,Qiao Wang,Jun Li,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Cyanate Ester Resins (CERs) are widely recognized for their excellent thermal stability and chemical resistance. However, their brittleness and high curing temperature limit their applications in key areas. To overcome these critical problems, this study investigates the enhancement of europium (Eu 3+ )-induced polystyrene- co -polyacrylic acid nano-aggregates (EIPAs) on the mechanical properties of EIPAs-doped bisphenol F dicyanate resin (EIPAs/F-CER). This modified F-CER exhibits significant improvements in tensile strength and flexural strength at the optimized concentration of 0.8 wt% EIPAs, corresponding to increases of 102.93 % and 121.72 %. At the same time, the thermal stability of this hybrid EIPAs/F-CER increases from 403.89 °C to 412.67 °C. Moreover, the photoluminescence property of the doped F-CER is optimally generated at 0.8 wt% EIPAs content, demonstrating excellent red emission at 612 nm. Therefore, the distinguished innovations of this work are (1) simultaneous enhancement of both mechanical properties and thermal stability, and (2) accompanying excellent red luminescence for potential temperature sensing. These achieved important results indicate that EIPAs are more effective in the mechanical enhancement of F-CER and capable of generating excellent luminescence and thermally stable flexible hybrid materials.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2025
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IF 6.3
Peng Gong,Xiangyu Xu,Weiguo Chen,Fei Liu,Pan Guo
This study reports a novel strategy to fabricate phase change composites (PCCs) by integrating polydopamine (PDA)-modified ultrafine silicon carbide (SiC) with copper nanosheets (CuNSs) in paraffin wax (PW). The PDA coating (10–20 nm) on SiC forms a conjugated aromatic layer for enhanced solar-light absorption, while two-dimensional CuNSs construct a continuous thermal-conductive network.” The results show that the thermal conductivity of the optimized PCCs reaches 3.9 W m −1 K −1 (16.3-fold improvement over pure PW), and the solar-thermal conversion efficiency achieves 88.9 % due to the synergistic effect of PDA's light absorption and CuNSs' localized surface plasmon resonance. Additionally, the mass retention rate of PCCs at 80 °C is 99.5 %, demonstrating excellent shape stability. This work provides a multi-functional strategy for improving energy storage performance, holding potential for applications in solar-integrated building systems and thermal management.
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高影响因子
危险品化学品经营许可证（带存储）