JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2026
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IF 2.6
Xu Guojuan,Zhang Weigang,Zhang Jialun,Xin Zhifeng
Ultra-low near-infrared reflectance coatings with a reflectivity of less than 10% at 1.06 µm are a research hotspot in the field of laser stealth. In this paper, various types of ultra-low near-infrared reflectance coatings were prepared using polyurethane (PU) as the binder and carbon nanotubes, carbon black, and graphite as the functional fillers. The effects of the types of carbon-based materials, the addition amount of fillers, and the particle size of graphite on the micro-structure, near-infrared reflectivity, and mechanical properties of the PU/carbon-based material composite coatings were systematically investigated. The results indicate that as the addition amount of carbon nanotubes increases, the reflectivity of the PU/carbon nanotubes composite coating towards 1.06 µm near-infrared light generally shows a gradual upward trend. When the addition amount of carbon nanotubes reaches 4 wt.%, the reflectivity of the coating towards 1.06 µm near-infrared light can be as low as 2.909%. As the addition amount of carbon black increases, the reflectivity of the PU/carbon black composite coating towards 1.06 µm near-infrared light generally shows a gradual downward trend. When the addition amount of carbon black reaches 10 wt.%, the reflectivity of the coating towards 1.06 µm near-infrared light can be as low as 2.319%. When the graphite addition amount is 8 wt.%, the reflectivity of the coating towards 1.06 µm near-infrared light can be as low as 2.601%. Under the optimal conditions of carbon-based material addition amount, the coating can achieve an ultra-low near-infrared reflectivity of less than 3% for 1.06 µm near-infrared light, demonstrating outstanding laser stealth performance. When the graphite particle size is 4000 mesh, the reflectivity of the PU/graphite composite coating to 1.06 µm near-infrared light can reach its lowest level (2.601%), while the coating maintains outstanding mechanical properties.
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ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 30
·40660-40671
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IF 7.8
Jin Zhao,Yao Shunyu,Sun Chang,Zhang Chunqi,Liang Licheng,Liu Yipeng,Yang Qingqing,Liang Fei
The practical deployment of magnesium-based alloys, despite their attractive hydrogen-storage capacity and economical advantage, faces critical barriers in the form of high dehydrogenation temperatures and inadequate sorption kinetics. To overcome these barriers, a two-dimensional layered La x @Ti 3 C 2 -derived catalyst was therefore developed, which exhibits high catalytic activity toward the Mg-4Ni-2Y alloy. The Mg-4Ni-2Y + 10 wt % La 0.2 @Ti 3 C 2 composite not only lowered the onset absorption/desorption temperatures to 23.3 ° C and 265.5 ° C but also enabled the composite to achieve superior sorption kinetics, absorbing 4.80 wt % H 2 in 1 min at 150 ° C and releasing 5.16 wt % H 2 in 4 min at 350 ° C. Furthermore, the apparent activation energy (E a ) was substantially reduced to 85.22 ± 2.38 kJ/mol for the composite, thereby decreasing the dehydrogenation temperature and accelerating the kinetics. Systematic analysis suggests that the catalytic enhancement is primarily associated with highly dispersed Ti 0 species, which are proposed to act as the primary active sites for hydrogen dissociation and recombination. La decoration is suggested to serve as an electronic promoter, modulating the electronic structure of Ti sites and stabilizing the interfacial environment. This synergistic Ti-La interaction facilitates hydrogen activation and interfacial transfer without altering the intrinsic Mg/MgH 2 thermodynamics, thereby significantly accelerating hydrogen sorption kinetics.
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ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Youjian Chen,Yuxin Liu,Xu Yang,Lanchao Wen,Haifeng Li,Hongcheng Shang,Siyao Cheng,Wei Dong,Aming Xie
N-doped carbon materials are promising electromagnetic wave (EMW) absorbers, yet the distinct roles of N configurations (Graphitic-N, Pyridinic-N, and Pyrrolic-N) in dielectric loss remain unclear. This work introduces a ligand-centered molecular design strategy using 2-methylimidazole and 4-dimethylaminopyridine to precisely modulate N configurations. Systematic characterization reveals that 4-dimethylaminopyridine stabilizes Pyrrolic-N, increasing its content to 42.95% while reducing Graphitic-N to 9.57%, which introduces defects and enhanced polarization centers. Combining Debye relaxation theory and first-principles calculations, we quantitatively decouple dielectric contributions: Graphitic-N enhances conduction loss via improved carrier mobility, whereas Pyrrolic-N governs polarization loss. As a result, the Graphitic-N rich NC-M sample achieves a minimum reflection loss (RL) of −70.82 dB at 1.97 mm, while the Pyrrolic-N-rich NC-D sample extends the effective absorption bandwidth (EAB) to 5.9 GHz. This work establishes a clear structure-activity relationship, offering a rational pathway for designing configuration-controlled EMW absorbers. This work systematically elucidates the influence of different nitrogen configurations on the electromagnetic response mechanisms of materials by modulating the arrangement of nitrogen atoms, providing theoretical guidance and practical foundations for designing and constructing high-performance nitrogen-doped carbon-based materials for electromagnetic wave absorption. Download: Download high-res image (298KB) Download: Download full-size image
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RENEWABLE ENERGY
·
2026
·
IF 9.1
Hanyuan Lv,Ruojiang Liu,Yi Fan,Ruolin Zhao,Jun Li,Feifan Hong,Haizhen Liu,Jin Guo,Zhiqiang Lan
Due to their large specific surface area and high porosity, porous carbon materials have emerged as a prominent research focus in the field of hydrogen storage. In this study, nanoporous carbon-coated V 2 O 3 nanorods (p-V 2 O 3 /C) were synthesized through high-temperature calcination under a gas mixture using a vanadium metal-organic framework (V-MOF) as a precursor, aimed at enhancing the hydrogen storage performance of MgH 2 . The incorporation of p-V 2 O 3 /C significantly reduced both the initial dehydrogenation temperature and the activation energy for dehydrogenation of MgH 2 to 192 °C and 88.6 kJ∙mol −1 , respectively. Notably, catalytic MgH 2 can desorb 5.35 wt% hydrogen even at a low temperature of 225 °C over a duration of 75 min, with an impressive capacity retention rate of 98.5% after 30 cycles of hydrogen absorption/release. The proposed catalytic mechanism indicates that the presence of metals such as V, VO, V 2 O 3 , and MgO in the composite system formed by p-V 2 O 3 /C with ball-milled MgH 2 serves to reduce the Mg-H bond strength, thereby facilitating easier dehydrogenation of MgH 2 . Additionally, incorporating MgO can stabilize the crystal interface of MgH 2 while impeding particle growth and enhancing its dehydrogenation process. In this work, the multiphase composite system based on p-V 2 O 3 /C has improved the kinetic performance for hydrogen storage in MgH 2 .
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xiangzhong Kong,Zhilong Yao,Zicong Wang,Weijia Lv,Yuyang Ding,Xi Chen,Shi Li,Anqiang Pan,Zhongmin Wan
Aqueous zinc metal batteries are promising for large-scale energy storage, but nonuniform Zn 2+ transport, dendritic deposition, corrosion, hydrogen evolution, and insulating by-products undermine Zn reversibility. Here, a functionally stratified zinc oxalate/ polyacrylonitrile–zinc trifluoromethanesulfonate(PAN–Zn(OTf) 2 ) dual interphase is constructed on Zn by oxalic-acid-induced in situ conversion followed by solution coating(denoted as CNS@Zn). The outer PAN–Zn(OTf) 2 layer improves electrolyte wettability and ion-conduction capability, while nitrile–Zn 2+ coordination modifies the local coordination environment of Zn 2+ and facilitates more homogeneous interfacial Zn 2+ transport. The in situ formed zinc oxalate inner interphase limits direct exposure of active Zn to the aqueous electrolyte, suppressing corrosion, hydrogen evolution, and parasitic by-product formation. This sequential regulation from ion delivery to interfacial deposition reduces the apparent interfacial activation energy from 76.36 to 41.85 kJ mol −1 and promotes uniform, compact Zn deposition. Consequently, the CNS@Zn||NVO full cell retains approximately 140 mAh g −1 after 1930 cycles at 5 A g −1 , while the CNS@Zn||NVO pouch cell maintains approximately 250 mAh g −1 over 120 cycles at 1 A g −1 . This work establishes a hierarchical interface design coupling ion-transport regulation with corrosion protection for durable aqueous Zn metal anodes. Download: Download high-res image (130KB) Download: Download full-size image
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Mingxing Jing,Hongyuan Zhu,Shaocong Chang,Rongzhi Sun,Siyuan Jin,Han Wu,Zhuangzhi Sun
Freshwater scarcity is a global challenge, and solar-driven interfacial evaporation (SDIE) technology has received widespread interest for its sustainability. However, vapor accumulation and salt deposition significantly reduce its performance. This study describes a solar evaporator with a Janus wettability grooved structure. This design not only allows for efficient double-sided evaporation but also provides a localized heat environment that greatly improves natural convection, effectively enhancing vapor diffusion. Under 1 sun irradiation, the optimized evaporator (JGE-60°) had an evaporation rate of 2.27 kg m–2 h–1. Under forced convection (4 m/s) conditions, its surface temperature dropped below ambient, reversing heat loss and increasing the evaporation rate to 5.96 kg m–2 h–1. Owing to the asymmetric wettability of its dual-sided structure, salt is selectively directed and deposited on the shaded side. This enables stable operation for 30 h in a 20 wt % brine while achieving a salt collection rate of 193.9 g m–2 h–1. This work simultaneously addresses two critical bottlenecks─vapor diffusion suppression and salt accumulation─through a simplified structural design, providing an important scientific and applied paradigm for evaporator design.
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Small
·
2025
·
IF 12.1
Ziming Wan,Weihua Zhou,Zhuo Chen,Jian Wang,Haoyu Feng,Lin Sheng,Junrun Feng,Zhangxiang Hao
Aqueous zinc-ion batteries (AZIBs) have gained significant traction in large-scale energy storage due to their notable safety and cost-effectiveness. Nevertheless, their commercialization has been significantly hindered by long-term issues such as dendrite growth, hydrogen evolution reaction, and other side reactions. In this study, it is proposed a chemical wet etching method that is both simple and highly scalable. This method effectively removes the natural passivation layer on the Zn surface, creating a metal-organic artificial interfacial layer (TAU-60@Zn). This layer exhibits a low nucleation barrier and a high ion transfer number, thereby promoting the rapid and uniform deposition of Zn ions. Furthermore, TAU-60@Zn assists in maintaining the pH at the electrolyte/anode interface, thereby effectively hindering the hydrogen evolution reaction and other undesirable side reactions. Consequently, the symmetric cell assembled with TAU-60@Zn attains an exceptional cycle life of over 2925 h at a current density of 5 mA cm −2 , and 180 h at 34.2% depth of discharge (DOD). Furthermore, the full cell with a MnO 2 cathode retains 46% of its capacity after 1000 cycles, compared to just 30% for the MnO 2 //Zn cell. This chemical etching strategy offers a promising path forward for the commercial application of AZIBs.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Ziming Wan,Yongxia Jiang,Weihua Zhou,Zhuo Chen,Jian Wang,Lin Sheng,Junrun Feng,Zhangxiang Hao
Aqueous zinc-ion batteries (AZIBs) are gaining attention as safer and cost-effective alternatives to lithium-ion batteries (LIBs) for large-scale energy storage. Despite their potential, challenges such as zinc dendrite formation and spontaneous corrosion hinder long-term performance. To address these issues, surface coatings on zinc anodes have been explored to address these issues, but conventional organic and metallic coatings often increase charge transfer resistance due to their dense structure. In this study, we propose titanium dioxide nano sols (NS-TiO 2 ) as a novel solution to improve zinc anode performance. Synthesized via a cost-effective sol-gel method, NS-TiO 2 forms a thin, porous coating that enhances ion transport and reduces charge transfer resistance, while effectively mitigating dendrite formation. The amorphous structure of NS-TiO 2 provides superior ion and electron mobility by creating additional diffusion channels, facilitating homogeneous Zn 2+ deposition. In a symmetric cell, NS-TiO 2 @Zn electrodes demonstrated exceptional cycling stability, maintaining performance for over 2400 h at 5 mA cm −2 . Additionally, in an asymmetric Cu || NS-TiO 2 @Zn cell, Coulombic efficiency exceeded 99.69 % for 440 cycles. These findings highlight the potential of NS-TiO 2 coatings to significantly enhance the cycling stability and efficiency of AZIBs, offering a promising pathway for improving large-scale energy storage technologies.
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ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Wenlong Wang,Wentao Hao,Lang He,Jia Qiao,Ning Li,Chaoqiu Chen,Yong Qin
S-scheme heterojunctions have garnered significant interest in photocatalytic CO 2 conversion to valuable products (e.g., CH 4 ) due to their enhanced charge separation and robust redox capabilities. Carbon dots (CDs), with their tunable band structures and light absorption ranges, show particular promise in constructing efficient S-scheme photocatalytic systems. Nevertheless, the critical roles of CDs' band alignment and surface adsorption properties in determining heterojunction configuration, charge carrier kinetics, and ultimately CO 2 activation/product selectivity distribution remain insufficiently explored. Herein, we construct four CDs/TiO 2 heterojunctions using CDs synthesized from varied carbon sources, in which S-scheme heterojunctions were successfully constructed based on cost-effective coal pitch (C-GQDs, 1.75 nm), glucose (G-CQDs, 1.84 nm), and acetone (CQDs-X, 1.82 nm) carbon sources, whereas Type-I heterojunctions were formed by carbon black based CDs (GQDs-A, 1.92 nm). Systematic investigations reveal that both the band structure and adsorption characteristics of CDs play important roles in the charge transfer path and separation efficiency, CO 2 adsorption and activation capacities, and product selectivity in photocatalytic CO 2 reduction. Remarkably, the introduction of CDs significantly broadens the photo-response range compared to fresh TiO 2 , and in particular, the C-GQDs/TiO 2 exhibits exceptional performance with a CH 4 production rate of 32.7 μmol·g −1 ·h −1 , surpassing TiO 2 by 6.3-fold and outperforming GQDs-A/TiO 2 , CQDs-X/TiO 2 , and G-CQDs/TiO 2 by factors of 3.8, 2.7, and 2.3, respectively. This heterojunction simultaneously achieves 72.6 % CH 4 selectivity and 98.1 % hydrocarbons selectivity (encompassing CH 4 , C 2 H 6 , C 2 H 4 , and C 3 H 8 ). In contrast, composites incorporating GQDs-A, CQDs-X, or G-CQDs exhibit substantially diminished CH 4 selectivity (<40.0 %). The high CH 4 production rate and selectivity of C-GQDs/TiO 2 can be attributed to its unique S-scheme heterojunction structure, higher reduction potential, and well-matched CO 2 and H 2 O adsorption and activation capabilities. This study provides unique insights into the efficient photoreduction of CO 2 to CH 4 driven by the S-scheme heterojunction electron transfer pathway in CDs/TiO 2 photocatalysts.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Sijia Zheng,Huige Ren,Haiyan Xue,Lingqi Huang,Jianfeng Zhang,Zhihai Cao
With the emergence of soft electronics, composite materials with a combination of robust adhesion, reprocessing and recycling capability, electrical and thermal conductivity, and biocompatibility are highly required. α-Lipoic acid–based silicone composites are fabricated by a simultaneous ring-opening reaction of epoxide-functionalized silicone with α-lipoic acid and ROP of α-lipoic acid. The liquid metal (LM) is incorporated via −COOH-LM- and -S-LM- coordination. The resultant LM-LAPs exhibited robust adhesion to various substrates. The LM-LAPs exhibited efficient reprocessability and recycling capability enabled by carboxylic groups, disulfide exchange, and depolymerization of the disulfide backbone. Thermal and electrical conductivity reach 2.35 W m–1 K–1 and 19.48 S m–1 for LM-LAP70. Notably, the optimized LM-LAP50 was successfully used in monitoring body movement. This design offers a new route for creating silicone elastomers with technological implications for flexible electronics.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zhiyuan Wang,Libo Wang,Shihao Cui,Dejian Xu,Hui Wang,Honghao Liu,Haipeng Zhang,Ning Gong,Qingshan Zhao,Mingbo Wu
Pd-based catalysts play a pivotal role in nitroaromatic hydrogenation for fine chemical synthesis, yet their intrinsic overactivity often undermines target selectivity. In this study, we develop a highly efficient and magnetically recoverable Pd/Fe3O4–rGO catalyst for nitroaromatic hydrogenation through dual-support interfacial engineering, realized by precisely anchoring Pd nanoparticles at the heterojunctions of ferrosoferric oxide and reduced graphene oxide (Fe3O4–rGO). The dual-support modulation effect not only ensures uniform Pd distribution via strong interfacial interaction but also drives directional charge transfer from Pd to the Fe3O4–rGO composite support, synergistically enhancing nitro group adsorption and optimizing H2 dissociation kinetics. The prepared Pd/Fe3O4–rGO catalyst achieves exceptional catalytic performance with 99% conversion and >97% selectivity for the chemoselective hydrogenation of diverse nitroaromatics under mild conditions while maintaining remarkable activity/selectivity over multiple cycles. Notably, the integrated Fe3O4 component facilitates efficient magnetic separation (<2 min), demonstrating industrial viability for continuous processes. This work provides a rational dual-support strategy that simultaneously regulates spatial configuration and electronic states of active sites to overcome the activity-selectivity trade-off in hydrogenation catalysis.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Yu Qiao,Huajing Zhou,Lingxiang Zhao,Liang He,Rongrong Miao,Zilian Liu,Qingqing Guan
Chlorophenol pollutants are listed as global priority control substances due to their strong carcinogenicity and difficult biodegradability. The advanced oxidation technology based on •OH has strong oxidizability superior to other oxygen-active substances, and has become a favorable candidate for the treatment of organic pollutants in the environmental field. Among them, electrocatalytic two-electron ORR is widely used in water environment treatment as a typical electrochemical advanced oxidation (EAOP) technology. Under normal conditions, molecular oxygen (O 2 ) can be selectively reduced to hydrogen peroxide (H 2 O 2 ) by ORR two-electron reaction, and then further forms efficient hydroxyl radicals (•OH), which is used to target various refractory micropollutants.However, the electro-Fenton (EF) process faces challenges such as slow O 2 adsorption and activation, slow O−O bond cleavage, and slow ORR kinetics on the cathode due to the dissolution of metal ions. In the ORR reaction, the terminal adsorption of ∗OOH intermediates on the active site is difficult to achieve independent regulation, resulting in a slow kinetic process of directional conversion from hydrogen peroxide to hydroxyl radicals.Therefore, the removal efficiency of organic pollutants in EF process is seriously restricted by the above factors.This thesis proposes a kinetic optimization strategy based on the synergistic effect of heteronuclear bimetallic catalysts and the polarization of surface hydroxyl groups (−OH). By constructing a cobalt-iron layered double hydroxide (CoFe-LDHs) catalyst, we significantly enhance the selective generation of hydroxyl radicals along the oxygen reduction reaction (ORR) pathway, achieving efficient degradation of refractory organic pollutants such as 4-chlorophenol (4-CP). Our research reveals that CoFe-LDHs form a Fe−O−Co bridging structure through electron transfer between Fe 3+ and Co 2+ , which induces asymmetric adsorption of the O−O bond and lowers the kinetic energy barrier for O−O coupling (forming MxO−HOOH intermediates). This enables the directed conversion of •OH at low overpotentials. Therefore, the kinetic optimization strategy for catalysts based on modulating the adsorption of intermediates at active sites is not only of significant importance in current research but also provides new ideas and directions for future catalyst design and development.In particular, it shows broad application prospects in the fields of energy conversion and storage, environmental pollution control and so on.
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