Nanomaterials
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2026
·Vol. 16
·期 16
·1028
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IF 4.8
Wei Zhou,Haseeb Ur Rehman,Zeming Wang,Oleksandr Ivasenko
Graphite-based nanocomposites with nitrogen-rich covalent two-dimensional materials are promising for energy, catalytic and sensing applications, but their controlled construction remains challenging because both graphite and many covalent 2D materials consist of stacked sheets that are difficult to integrate homogeneously without prior exfoliation, dispersion, mixing, and restacking. Here, we explore a solvent-free strategy that uses melamine-confined graphite as a preorganized precursor for chemical transformations between graphene layers. We demonstrate that intercalated melamine can undergo reaction pathways analogous to those of bulk melamine, enabling not only the previously reported formation of graphite/g-C3N4composites but also the construction of a new graphite/melem composite. The same concept is further extended to multicomponent solid-state reactions by introducing pyromellitic dianhydride, enabling the formation of new graphite/polyimide-linked two-dimensional material composites from either melamine or melem precursors. Comparison of one-pot and stepwise routes shows that precursor preorganization within graphite improves framework preservation, structural continuity, and morphological homogeneity. Overall, this work presents graphite interlayers as confined reaction environments for transforming simple nitrogen-rich molecules into integrated graphite/2D-material composites, providing a scalable platform for exploring solid-state chemistry and hybrid material synthesis between graphene layers.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 4.4
Jiao Yang,Wu Pei,Cheng Li,Yao Cheng
Given the flammability of epoxy resin (EP), enhancing its fire safety is crucial. Therefore, designing an additive flame retardant with highly effective flame-retardant properties is particularly important. This experiment designed three metal-modified P-N synergistic flame retardants (A–M–Mg, A–M–Cu, A–M–Zn), which were incorporated into EP at a fixed proportion (20 wt%) to prepare composite flame-retardant systems. After adding three different metal-modified flame retardants, the limiting oxygen index (LOI) of the EP increased from 21.0 to 29.6%, 28.8 and 27.2%. UL-94 flammability ratings achieved V-0, V-1 and V-2 classifications. This demonstrates that flame retardants modified with magnesium exhibit superior flame retardancy compared to those modified with copper and zinc. Compared to pure EP, testing with a cone calorimeter revealed reductions of 70.3, 72.7 and 67.2% in total heat release, peak heat release rate and total smoke volume. The reduction of pyrolysis products during combustion, combined with the selective catalytic effect of metallic magnesium and P-N synergistic flame retardancy, collectively promotes the formation of a dense and stable char layer. This significantly enhances the flame retardancy and safety of EP. Additionally, A–M–Mg exhibits good compatibility and strong interfacial interactions with EP, but its particle size and distribution adversely affect the mechanical properties of EP. In summary, this study provides a simple and effective strategy for preparing EP composites with outstanding flame-retardant properties, aiming to address fire safety concerns across various industrial sectors. Graphical abstract The alternative text for this image may have been generated using AI.
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LANGMUIR
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2026
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IF 4.4
Ruiyv Bai,Weian Huang,Zengbao Wang,Fuhao Zhao,Lixin Zhu,Weidong Wang,Yvqing Zhu
A novel melamine-derived quaternary ammonium salt corrosion inhibitor (Me-B) was synthesized using melamine and benzyl bromide as raw materials. Systematic evaluation of its corrosion inhibition performance for N80 carbon steel in a 15 wt % HCl solution was conducted via weight loss measurements and electrochemical techniques. Experimental results demonstrate that Me-B exhibits outstanding performance. At 363 K, the addition of 0.1 wt % Me-B significantly reduced the corrosion rate of N80 steel from 1,258.36 g·m–2·h–1 to 19.75 g·m–2·h–1, corresponding to an inhibition efficiency of 98.4%. Even at elevated temperatures up to 383 K, Me-B retained measurable corrosion inhibition capability. Adsorption of Me-B on the N80 steel surface follows a mixed physical-chemical mechanism consistent with the Langmuir adsorption model, which elevates the energy barrier for corrosion reactions and impedes their progression. Theoretical calculations elucidated the inhibition mechanisms of both neutral Me-B and protonated Me-B (Me-BH+), revealing that Me-BH+ possesses superior reactivity and enhanced adsorption affinity toward the metal surface compared to neutral Me-B. This facilitates the formation of a compact protective film that effectively blocks corrosive medium penetration, thereby mitigating acid-induced metal corrosion.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 2
·143
·
IF 4.5
Yifei Gao,Shuai Li,Min Jiang,Cheng Chen,Francis Verpoort
The efficient conversion of CO2into valuable chemicals using highly efficient, environmentally friendly, and renewable heterogeneous catalysts is paramount for the progression of a carbon circular economy. In pursuit of this goal, this study introduces a metal-free, scalable melamine-based organic polymer catalyst designed to integrate CO2adsorption with customizable functional properties. Employing both solid-state thermal synthesis (SST) and hydrothermal methods, we synthesized three amine-based hydrogen bond donor catalysts, thereby balancing environmentally conscious practices with scalable synthesis: MCA, a high-nitrogen-content polymer derived from trichlorocyanuric acid; MCA-SST; and MTAB, a triazine-trichlorocyanuric acid polymer. Under mild conditions (100 °C, 0.1 MPa, 24 h), MCA demonstrated superior catalytic performance in the CO2cycloaddition of epichlorohydrin, achieving a 99% conversion rate, significantly surpassing MCA-SST (60%) and MTAB (78%). MCA’s high specific surface area and structural integrity facilitate efficient catalysis under mild conditions, and it retains 79% of its initial activity after five cycles, indicating exceptional stability. These results suggest that while the incorporation of secondary amines and increased nitrogen content generally promote the reaction, densely packed adjacent secondary amine linkages can induce repulsion between nitrogen atoms, thereby weakening active sites and reducing catalytic activity. Consequently, this study not only presents MCA as a novel metal-free catalyst exhibiting remarkable performance in catalyzing CO2cycloaddition under ambient pressure and mild conditions, but also elucidates the structure–activity relationship between secondary amine density and catalytic activity. This work provides a deeper mechanistic understanding and offers a theoretical foundation for future rational catalyst design.
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APPLIED THERMAL ENGINEERING
·
2026
·
IF 7.5
Zixiong Zhou,Kexin Liu,Yueyu Zeng,Xinxi Li,Zikai Guo,Peihui Chen,Hongli Liu,Shuyao Li,Qiqiu Huang,Zhonghao Rao
One-pot synthesis has coupled epoxy curing, phase matrix and intrinsic flame retardancy. • Phosphoric acid is benefit for curing, framework crosslinking and flame retardancy. • Melamine is crosslinked P N synergistic flame-retardant skeleton among composite. • Flame-retardant skeleton and expandable graphite form continuous conductive heat pathways. • This composite enables cooling and prevent localized thermal-abuse in battery module. Organic phase-change materials (PCMs) are pivotal for passive battery thermal management, but their deployment is hindered by intrinsic flammability, molten leakage, and low thermal conductivity. The conventional flame-retardant CPCMs typically suffer from a functionally segregated architecture, while the PCM, support matrix, flame retardants, and fillers are physically blended. This often leads to compromised interfacial compatibility and trade-offs among thermal storage, mechanical stability, and fire safety. Herein, we have proposed a novel intrinsically flame-retardant CPCM via a one-pot, structurally integrated designation. Phosphoric acid serves a multifunctional role, replacing the conventional curing agent to initiate epoxy ring-opening, facilitating the covalent tethering of PEG2000, and constructing phosphorus-rich networks. Subsequent incorporation of Epoxy A, phosphate and melamine (APM) occurs fireproof framework, enabling P N synergistic flame retardancy. Expandable graphite is integrated to establish efficient thermal highways. This design ensures that the APM framework concurrently addresses PEG immobilization, structural reinforcement and flame-retardant properties. The optimized composite of PAPM3 with 12.34% MA exhibits exceptional durability, retaining 99.54% of its mass after aging at 150 °C for 5 h. Its thermal conductivity reaches to 1.153 W·m −1 ·K −1 , representing a 33.3% enhancement over controls. Benefiting from the condensed-phase charring and gas-phase dilution effects, PAPM3 achieves a UL94 V-0 rating and an LOI of 26.10%, with a 37.18% reduction in PHRR compared to PABM. In battery module tests, PAPM3 maintains the peak temperature below 48.08 °C and the maximum temperature difference within 7.77 °C under 3C discharge. Especially, under simulated localized thermal abusing condition, PAPM3 mitigates localized heat accumulation and delays thermal propagation. This research provides an efficient strategy to harmonize high temperature stability and fire proof safety for advanced battery thermal management systems.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yunxin Ai,Zhaoqi Zhu,Weijun Liu,Hanxue Sun,Jiyan Li,Rui Jiao,An Li
Developing high-performance materials with wave-absorbing, flame-retardant, and heat-insulating properties is strategically crucial for safety protection and functional optimization in aerospace, electronic information, and construction. In this study, carbonaceous microspheres served as templates for preparing inorganic multi-shell hollow spheres (MHS) via simple hydrothermal and calcination processes. AHP-MA@MHS was then synthesized by incorporating aluminum dihydrogen phosphate (AHP) and melamine (MA) into MHS at a controlled ratio of 4:1. When introduced into epoxy resin, results indicate that the resulting composite (AHP-MA@MHS-EP) exhibits excellent thermal insulation performance, with its thermal conductivity reduced to 0.0238 W m −1 K −1 . Flame retardancy was evaluated via the Limiting Oxygen Index (LOI) test, Vertical Flame Test (UL-94), and Cone Calorimeter (CC) test. Test results indicate that AHP-MA@MHS-EP exhibits excellent flame retardancy, with an enhanced LOI value of 27.7 and a V-0 classification in the UL-94 test. Additionally, its peak heat release rate (PHRR) is 524.12 kW m −2 , representing a 38.86 % reduction compared to that of pure EP. Meanwhile, the vector network analyzer indicates that the inclusion of AHP-MA@MHS endows the material with good wave-absorbing performance in the low-frequency band (−35.1 dB). Consequently, the prepared AHP-MA@MHS-EP holds great potential for applications requiring both wave absorption and heat-insulating flame retardancy.
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高影响因子
Materials Today Sustainability
·
2025
·
IF 7.9
Bing Liu,Qiushi Sun,Meng Sun,Shuang Liu,Hao Wu
As the need for enhanced energy efficiency and the use of renewable energy increases, polyethylene glycol (PEG), a crucial element in phase change materials (PCMs), has gained considerable focus in the areas of temperature control and energy storage. Nevertheless, PEG faces leakage and undesired light absorption problems in practical applications. In this study, melamine foam (MF) is utilized as an encapsulation material in an attempt to tackle the leakage problem. ZIF-67 is incorporated onto MF by in situ growth, followed by high-temperature carbonization to prepare a hierarchical porous carbon, which further enhances the absorbance of phase change composite (PCC). The crystallization of the prepared PCCs is in the range of 157.9-170.3 J/g. The photo-thermal conversion rate of PCC is 92.65%, and the thermal conductivity is 0.38 W/(m∙K). In conclusion, the problems of PEG leakage and low light absorption were solved by carbonized porous encapsulation technique and in situ growth of ZIF-67, which enhanced the solar-thermal energy conversion of storage and PCCs.
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Science China-Materials
·
2020
·Vol. 64
·期 5
·1150-1158
·
IF 6.098
Chen Jing,Pan Anqiang,Zhang Wenchao,Cao Xinxin,Lu Rou,Liang Shuquan,Cao Guozhong
Noble metal-free electrocatalysts with high activity are highly desirable for the large-scale application of hydrogen evolution reaction (HER). Mo 2 C-based nanomaterials have been proved as a promising alternative to noble metal-based electrocatalysts owing to the Pt-resembled d-band density and optimal intermediates-adsorption properties. However, the aggregation and excessive growth of crystals often occur during their high-temperature synthesis procedure, leading to low catalytic utilization. In this study, the ultrafine Mo 2 C/Mo 2 N heterostructure with large surface and interface confined in the N-doped carbon nanofibers (N-CNFs) was obtained by a melamine-assisted method. The synergistic effect of Mo 2 C/Mo 2 N heterostructure and plenty active sites exposed on the surface of ultrafine nanocrystals improves the electrocatalytic activity. Meanwhile, the N-CNFs ensure fast charge transfer and high structural stability during reactions. Moreover, the in-situ synthesis method strengthens the interfacial coupling interactions between Mo 2 C/Mo 2 N heterostructure and N-CNFs, further enhancing the electronic conductivity and electrocatalytic activity. Owing to these advantages, Mo 2 C/Mo 2 N@N-CNFs exhibit excellent HER performance with a low overpotential of 75 mV at a current density of 10 mV cm −2 in alkaline solution, superior to the single phased Mo 2 C counterpart and recently reported Mo 2 C/Mo 2 N based catalysts. This study highlights a new effective strategy to design efficient electrocatalysts via integrating heterostructure, nanostructure and carbon modification.
研究领域:
材料科学
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电化学
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纳米技术
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能量转换
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催化
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高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Jinjie Xu,Yuehong Pang,Zhuying Yan,Xiaofang Shen
Glyphosate, a widely used herbicide, is prone to residue in the environment that may cause harm to humans. In this work, titanium ion-modified melamine foams (MF/PDA/Ti 4+ ) were prepared as sorbents to achieve rapid extraction of glyphosate by pipette-tip solid-phase extraction (PTSPE). The MF/PDA/Ti 4+ was characterized by SEM, EDS, XPS, and TGA, and its adsorption properties were evaluated by adsorption kinetics and isotherm experiments. The porous structure and good mechanical properties of MF made the MF/PDA/Ti 4+ fill into the pipette-tip easily and could achieve low back pressure. The developed PTSPE method showcased short extraction time (<2 min) for glyphosate and the limits of detection (LOD, 3σ/k) was 4.9 μg/L. It was applied in aqueous samples (tap water, lake water, tea drink, and orange juice) with recoveries ranging from 82.8 % to 108.2 % and the relative standard deviation (RSD, n = 3) was less than 7.7 %, demonstrating broad perspectives on the extraction of glyphosate from the aquatic and terrestrial environment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Heng Zhao,Xiaolin Ma,Mingjie Lu,Fengting He,Feifei Lin,Yang Zhang,Jinqiang Zhang,Pei Dong,Chaocheng Zhao,Hongqi Sun
In this work, a melamine foam derived nitrogen (N) and boron (B) co-doped metal-free electrode was prepared by accessible method and applied in heterogeneous electro-Fenton (EF) system. Overcoming the metal ion leaching and harsh operating conditions of most transition metal electrodes, the prepared metal-free electrode (NB/CF 40 ) possessed an excellent EF performance for degradation of metronidazole (MTZ) in a wide range of pH (3–11), maintaining great reusability even after ten runs with higher mineralized current efficiency (MCE) and lower energy consumption (EC). Significantly, the NB/CF 40 has excellent decontamination performance for actual wastewater containing MTZ analyzed by quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) and three-dimensional excitation-emission matrix fluorescence spectra (3D EEMs). According to experimental results, characterization analysis and density functional theory (DFT) calculations, EF reaction mechanism by NB/CF 40 cathode was proposed, in which the active sites of B C C C-graphitic N and B C C C-pyridinic N configurations contributed to the improvement of EF performance by affecting the charge density of nearby carbon framework, adsorption of O 2 , and desorption of *OOH. This work offers a new idea for the remediation of wastewater by the efficient metal-free EF system in a wide pH range.
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高影响因子
ACS ES&T Engineering
·
2023
·
IF 7.1
Junna Yan,Mengyu Ma,Keyi Liu,Yang Bao,Feihu Li
Efficient removal and recovery of phosphorus (P) from wastewater is critical for addressing both phosphate rock depletion and eutrophication-related deterioration of surface water quality. Herein, we present a promising platform approach integrating cerium-doped NH2-MIL-101(Fe) with melamine sponge (MS) scaffolds for rapid and high-efficiency recovery of P from wastewater. The as-prepared MIL-101@sponge composites (denoted as MIL-101@CS, MIL-101@PVDF, and MIL-101@SDBS, respectively) are featured by flexibility and stability according to many characterization techniques. Batch adsorption of P over these composite adsorbents indicates that these MIL-101@sponge composites exhibit a maximum adsorption capacity (e.g., 253.66 mg g–1 for MIL-101@CS) at the optimum pH of 6.0 and that adsorption equilibrium can be attained within 150 min and well described by the pseudo-second-order kinetic model. In addition, these composites show a high selectivity for P over carbonate and other common monovalent anions under environmentally relevant conditions. The results of desorption and recycling tests indicate that MIL-101@CS retains good adsorption and desorption efficiency even in a much short operating time (i.e., 5 min), which allows such a composite to be applied in enriching and recovering P efficiently from wastewater via a rapid adsorption/desorption operation. Moreover, the high feasibility of MIL-101@CS in actual scenarios was validated by efficiently enriching the P from a sludge dewatering liquid. Furthermore, the main mechanisms for P adsorption are elucidated from various microstructural characterizations. Overall, this work presents a strategy of integrating MIL-101 with sponge scaffolds for rapidly and efficiently recovering P from wastewater, which may be potentially extended to the recovery of other value-added elements of interest from waste streams.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Chunxia Zhao,Jiaxin Li,Zhuo Chen,Haoran Huang,Jinbo Cheng,Dong Xiang,Zhenyu Li,Yuntao Li,Yuanpeng Wu
The oil spill and industrial oily wastewater in large quantities has caused severe harm to the environment and human health, which make an urgent requirement to develop low-cost, eco-friendly, stable performance and highly efficient oil/water separation materials. Herein, a superhydrophobic/superlipophilic melamine sponge with excellent hydrophobic stability was successfully fabricated via one-step emulsion polymerization . During polymerization, trimethylolpropane triacrylate (TMPTA) and polyethylene imine (PEI) form robust microspheres , and polydimethylsilane (PDMS) cross-links to form hydrophobic coating on the original sponge skeleton. The modified sponge could continuously separate various immiscible oil/water mixtures under harsh conditions (including strong acids, strong bases, salts). Even after 10 consecutive cycles, the separation efficiency for toluene and petroleum ether exceeds 99.87%. In addition, the as-prepared sponge exhibited extraordinarily high oil absorption capacities (with a maximum saturated oil absorption of 107.31 g/g for chloroform) and excellent reversible compressibility (up to 100 compression cycles). More importantly, the pore size of modified sponge was adjusted through a simple mechanical compression strategy so that the compressed sponge met the particle size screening requirements to effectively separate the surfactant-stabilized water-in-oil emulsions. Based on the simple preparation protocol, fluorine-free raw materials, and excellent properties, the MS-TMPTA/PEI-PDMS sponge presented here have extremely promising application potential in oil/water separation.
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高影响因子
危险品化学品经营许可证（带存储）