POLYMER
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2026
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IF 5.1
Meng Ma,Dezhong Wang,Yan Liao,Sicheng Huang,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
Cellulose nanofibers (CNF) feature a three-dimensional nanofiber network, excellent mechanical properties, and abundant surface hydroxyl groups, facilitating the integration of boron nitride (BN) for fabricating flexible composite films with high thermal conductivity. However, achieving a balance between high thermal conductivity and strong mechanical strength at high BN loadings remains a formidable challenge. A mussel-inspired strategy is employed, in which BNNS-OH and CNF are coated with polydopamine (PDA) to improve their interfacial adhesion and compatibility. The PDA-BNNS-OH is then silanized with 3-aminopropyltriethoxysilane to acquire a positive charge, enabling its subsequent electrostatic adsorption onto PDA-CNF and assembly into a robust film. At a high filler loading of 60 wt%, the resultant composite film achieves an outstanding in-plane thermal conductivity of 18.9 W m −1 K −1 , a 1250% improvement relative to the pure CNF film. Remarkably, this marked enhancement is achieved without compromising the film's high electrical insulation capability, as evidenced by a volume resistivity exceeding 10 11 Ω m, while still delivering a substantial tensile strength of 49.5 MPa. These synergistic enhancements are attributed to the optimized interfacial bonding, which effectively reduces thermal resistance and suppresses phonon scattering. This interface design strategy offers a promising pathway for developing advanced thermal management materials.
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CRYSTENGCOMM
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2026
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IF 2.4
Qi Chen,Hongwei Duan,Yan Song,Yaning Guo,Hongge Zhang,Feng Zhang,Xiaobin Hu,Yinfeng Han
The rational design of hierarchical Co-Ni-Fe-based inorganic materials is of great significance for functional electrochemical applications. Here, a self-supported Co2(OH)2CO3@CoFe-LDH hierarchical heterostructure was constructed in-situ on a conductive nickel foam substrate via a one-step hydrothermal method. A prominent structural feature is that Co2(OH)2CO3 nanoneedles are uniformly and radially anchored on the surfaces of CoFe-LDH nanosheets, which effectively suppresses nanoneedle aggregation. By systematically tuning the Co2+/Fe3+ molar ratio, the effects of composition on phase selectivity, nucleation behavior, and morphological evolution in the multimetallic system were elucidated. The results reveal that CoFe-LDH nanosheets preferentially form at moderate Co2+/Fe3+ ratios, whereas further increasing the Co2+ content leads to heterogeneous nucleation of excess Co2+ species on the LDH surface and induces the directional growth of Co2(OH)2CO3, thereby giving rise to the hierarchical heterostructure. The resulting self-supported electrode exhibits stable oxygen evolution reaction performance under alkaline conditions. In situ Raman spectroscopy reveals a potential-dependent surface reconstruction, evidenced by the attenuation of precursor-related metal-oxygen vibrations and the formation of (oxy)hydroxide species at the heterointerfaces, highlighting the correlation between multimetallic composition regulation and interfacial structural evolution.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122309
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IF 7.5
Hongjiang Peng,Yanyu Song,Cong Lu,Gongjie Hua,Jinhong Wu,Kuangfei Lin
Advanced oxidation processes based on peroxymonosulfate (PMS) activation show promising application prospects in the field of water treatment, yet the efficient utilization of reactive oxygen species (ROS) in different spatial regions (bulk solution and catalyst surface) remains challenging. In this work, a catalyst consisting of trace cobalt ion-complexed hydroxyapatite (Co-HAP) was prepared, which exhibits excellent spatial synergistic oxidation effects. Bulk SO 4 •− and in-situ generated surface •OH ensure the efficient removal of levofloxacin (LEV) (74.5% within 20 min). Quenching experiments reveal the surface-mediated ROS evolution pathway, where bulk SO 4 •− reacts with the abundant lattice hydroxyl groups (-OH) on the HAP surface to in-situ generate surface-bound hydroxyl radicals (•OH surf ). Bulk SO 4 •− originates from the activation of PMS by Co ions. Electrochemical characterization and charge density difference simulation confirm that PMS receives electrons from the catalyst, thus inducing the breakage of O-O bonds to generate SO 4 •− . Therefore, bulk SO 4 •− is responsible for attacking dissolved pollutants, while LEV adsorbed on the catalyst surface is "precisely targeted" by surface-confined •OH. This "two-pronged" synergistic strategy significantly reduces mass transfer resistance and achieves efficient utilization of ROS, thereby the degradation rate ( k obs value) of LEV by Co-HAP is 4.6 times that by Co ions alone. Moreover, the Co-HAP system exhibits excellent stability and promising anti-interference ability. This study provides new insights into the positive role of carrier surface functional groups in regulating ROS distribution and evolution in heterogeneous catalysis.
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Sustainable Chemistry and Pharmacy
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2026
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IF 6.7
Deyang Zhao,Xinyu Zhao,Qikai Si,Kongde Li,Huawei Yang,Christophe Len
γ-valerolactone (GVL) is a renewable and sustainable platform chemical derived from biomass, with broad applications in chemical synthesis and energy-related fields. Consequently, the development of efficient strategies for GVL production has attracted significant attentions. In this study, the hydrogenation of ethyl levulinate (EL) to GVL was investigated using copper-cobalt basic carbonate, (CoCu) 2 (OH) 2 CO 3 , as a catalyst. The influence of different substrates—including esters and acids such as EL, GVL, ethyl acetate (EA), and levulinate acid (LA)-on catalyst recyclability and performance was systematically evaluated. Among the substrates tested, EL exhibited the most favorable behavior, delivering a GVL yield of up to 96% in the second recycling cycle under optimized conditions. This superior performance is attributed to the synergistic interaction between the basic sites of the catalyst and the ability of metallic Cu to activate hydrogen, as well as the formation of larger metal particle clusters when EL is used as the substrate. Notably, the catalytic activity remained largely preserved even after the third recycling cycle. In contrast, when GVL was sued as the substrate, moderate yields were obtained, accompanied by the formation of surface coatings on the catalyst particles. Furthermore, both EA and LA induced varying degrees of catalyst etching, resulting in a drastic loss of activity, with negligible catalytic performance observed in the second cycle. These findings indicate that catalyst deactivation due to etching has a more pronounced impact on catalytic performance than structural changes associated with bimetallic cluster formation. This observation indirectly highlights the critical role of basic sites in maintaining catalytic activity during the hydrogenation process.
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Nature Communications
·
2026
·
IF 18.1
Mao Qiqi,Wang Wenxin,Yang Ruidong,Deng Kai,Yu Hongjie,Li Wenzhen,Wang Liang,Wang Hongjing,Guo Shaojun
Industrial-level alkynols electrocatalytic semi-hydrogenation using seawater as hydrogen source offers a sustainable alternative to conventional thermocatalytic routes, yet remains limited by the lack of efficient and robust electrocatalysts. Here, we report the synthesis of Nd 1 Gd 1 dual atomic site on metallene for co-production of alkenol and magnesium hydroxide in the seawater system. Nd 1 Gd 1 Pd metallene achieves a selectivity of ≈96.7% and a Faradaic efficiency of ≈87.3% for the conversion of 2-methyl-3-butyn-2-ol to 2-methyl-3-buten-2-ol at −150 mA cm -2 in a flow-cell system, and maintains ≈98.0% selectivity at 1.2 A for over 300 h of continuous operation, achieving the long-term stable co-electrosynthesis of alkenols and magnesium hydroxide in natural seawater at industrial-scale currents. Techno-economic analysis reveals a projected product revenue of at least $8,499 per ton of 2-methyl-3-buten-2-ol, underlining the industrial viability of this process. Mechanism investigations illustrate dual hydrogen-spillover and co-catalytic effects on Nd 1 Gd 1 Pd, promoting migration-reaction coupling mechanism of reactive *H to synergize hydrogenation. This work provides a seawater electrocatalytic semi-hydrogenation system and proposes an optimization strategy by atomically engineered dual hydrogen-spillover effect.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122633
·
IF 7.5
Xiaoxuan Li,Ying Lv,Jiaxin Du,Xuelian Chen,Meixia Xiao,Shubin Lei
Defect engineering coupled with heterojunction construction represents a pivotal strategy for optimizing the charge separation dynamics of photocatalysts. Herein, we report the fabrication of a novel Z-scheme heterojunction composed of bismuth-based metal-organic frameworks (NOTT-220) and layered Bi 2 O 2 [BO 2 (OH)] nanosheets via a hydrothermal approach. To further potentiate the photocatalytic activity, surface oxygen vacancies (OVs) were precisely introduced into the heterostructure through controlled ultraviolet (UV) irradiation. This defect-rich engineering strategy significantly broadened the visible-light absorption range and facilitated the separation of photogenerated carriers. Consequently, the optimized catalyst (OVs-BN-20) exhibited a superior photocatalytic reaction rate constant of 0.8133 min −1 , achieving 95.9% degradation rate of CIP within 2 h. Detailed mechanistic investigations, including liquid chromatography-mass spectrometry (LC-MS) and electron spin resonance (ESR), elucidated the degradation pathways and confirmed the synergistic role of superoxide radicals (·O 2 -) and photogenerated holes (h + ). This work not only provides a facile pathway for designing defect-modulated Z-scheme photocatalysts but also offers profound insights into the mineralization mechanisms of persistent antibiotic pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xiaohui Chen,Zhishuncheng Li,Zhishan Li,Jia Liu,Zhouhang Li,Hua Wang,Kongzhai Li
Hydrogen energy represents a promising, sustainable and clean energy resource. However, widespread application of water electrolysis for hydrogen production remains limited by the reliance on expensive noble-metal-based catalysts. Developing cost-effective and efficient electrocatalysts is therefore crucial. Herein, we propose a novel heterostructure strategy to prepare non-noble-metal-based catalysts for overall water splitting. Through a simple two-step synthesis, NiTe-supported catalysts were fabricated: NF/NiTe/NiFe(OH) x -2 for the oxygen evolution reaction (OER) and NF/NiTe/Pt for the hydrogen evolution reaction (HER). Electrochemical measurements revealed outstanding catalytic activities: the optimized catalysts achieved current densities of 10 mA cm −2 at low overpotentials of 264 mV for the OER and 30 mV for the HER. When integrated into a two-electrode electrolyzer, the system required only 1.55 V to reach 10 mA cm −2 and 1.73 V to reach 100 mA cm −2 , while maintaining stable operation for 100 h and 50 h, respectively. Density functional theory calculations reveal that the Pt/NiTe heterostructure possesses a near-optimal Gibbs free energy for hydrogen adsorption (ΔG H* =-0.06 eV), which substantially accelerates HER kinetics. This work provides fundamental insights into heterostructure design and offers guidance for the rational development of efficient nanomaterials for catalytic applications.
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Nanomaterials
·
2023
·Vol. 13
·期 3
·493
·
IF 5.3
Meng Shao,Jun Li,Jing Li,Yanan Yan,Ruoliu Li
Honeycomb-like Ni(OH)2/Ni3S2/Ni foam (NF) was fabricated via a two-step hydrothermal process and subsequent alkalization. Ni3S2with a honeycombed structure was in-situ synthesized on the NF surface by a hydrothermal process. MOF-derived Ni(OH)2nanosheets were then successfully grown on the Ni3S2/NF surface by a second hydrothermal process and alkaline treatment, and a large number of nanosheets were interconnected to form a typical honeycomb-like structure with a large specific surface area and porosity. As a binder-free electrode, the prepared honeycomb-like Ni(OH)2/Ni3S2/NF exhibited a high specific capacitance (2207 F·g−1at 1 A·g−1, 1929.7 F·g−1at 5 mV·s−1) and a remarkable rate capability and cycling stability, with 62.3% of the initial value (1 A·g−1) retained at 10 A·g−1and 90.4% of the initial value (first circle at 50 mV·s−1) retained after 5000 cycles. A hybrid supercapacitor (HSC) was assembled with Ni(OH)2/Ni3S2/NF as the positive electrode and activated carbon (AC) as the negative electrode and exhibited an outstanding energy density of 24.5 Wh·kg−1at the power density of 375 W·kg−1. These encouraging results render the electrode a potential candidate for energy storage.Keywords:Ni(OH)2/Ni3S2/NF;honeycomb-like structure;two-step hydrothermal;alkalization;MOF-derived Ni(OH)2;supercapacitor
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SOLAR ENERGY
·
2022
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IF 7.188
J. Yan,B.W. Yang,C.Y. Zhao
Thermochemical energy storage (TCES) is a promising energy storage method because of its high energy storage density and long-term storage ability. The reactor is the most critical part of the TCES system, and the fluidized bed reactor (FBR) is a novel reactor, which is not restricted by the low effective thermal conductivity of energy storage materials. However, there is little theoretical guidance about the design and operation of the FBR for a TCES system. In this study, we investigated the performance of an FBR using MgO/Mg(OH) 2 as reaction materials by establishing a numerical model followed by experimental validation. The influence of operating parameters on the bed temperature was discussed based on numerical results. According to the sensitivity analysis, the reactor inner diameter, material mass, and inlet gas velocity were the main factors affecting the bed temperature. The optimal boundary surface temperature was analyzed, which influences the proportion of TCES in the total heat storage.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Debin Jiang,Xiaoping Wang,Li Feng,Yichang Yu,Jie Hu,Xiaoying Liu,Hong Wu
In this study, a novel nano-La(OH) 3 /porous carbon composites derived from La alginate xerogel with egg-box structure had been successfully synthesized by a gradient heat treatment in nitrogen atmosphere. This facile fabrication strategy can be easily employed to considerably encapsulate La(OH) 3 nanoparticles uniformly into the porous carbon matrix derived from the alginate macromolecule framework. The optimized sample, labeled as LS-550(N), exhibited extremely high phosphate uptake and great selectivity. The adsorption kinetic process dramatically followed pseudo-second-order model. The Langmuir model fitted maximum equilibrium adsorption capacity is 133.58 mg·g −1 . The phosphate adsorption mechanisms could be consist of electrostatic interaction, complexation and ligand exchange interaction on the surface of LS-550(N). The prominent practical applicability of LS-550(N) in the regeneration test suggests that the LS-550(N) could be a potential adsorption candidate for the decontamination of phosphate-containing natural water bodies.
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APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Hao Wang,Hongyou Yin,Zeng Zhang,Yan Wu,Chang Yi,Tingting Shen
γ-Cu 2 (OH) 3 Cl is used as a Fenton catalyst to mineralize phenol in high chloride solutions. The mineralization of phenol can be enhanced even at 15000 mg∙L –1 NaCl under ambient pH. In addition, other aromatic contaminants including bisphenol A , benzoic acid , 2-chlorophenol, salicylic acid and aniline can also be effectively mineralized under the high chloride concentration. However, reference catalysts including CuSO 4 , CuO and Cu 2 O are significantly depressed by chloride. The chloride resistance ability of γ-Cu 2 (OH) 3 Cl is proposed. First, σ-Cu-ligand complexes formed between Cu 2+ and phenolic hydroxyl can react with H 2 O 2 to promote the rapid reduction of Cu 2+ to Cu + , which are not hindered by chloride. Second, the self-redox property of γ-Cu 2 (OH) 3 Cl which initiates the electron transfer from H 2 O 2 to Cu 2+ to generate Cu + is improved by chloride. Third, the circumneutral pH could suppress HO• scavenging by chloride. The activation energies of phenol mineralization over γ-Cu 2 (OH) 3 Cl in chloride-free and high chloride solutions are 42.9 and 32.3 kJ∙mol –1 , respectively. Chloride does not change the phenol mineralization pathway but accelerates its degradation into small carboxylic acids.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Chao Qu,Yan-gang Li,Shu-juan Meng,Xiao-hu Li,Shu-jun Zhang,Da-wei Liang
Recently, carbon nanotubes coated carbon black and polytetrafluoroethylene (CNTs-C/PTFE) gas diffusion electrode was used as an air-cathode in an electro-oxidation (EO) system for effectively generating hydrogen peroxide (H 2 O 2 ) through a 2-electron oxygen reduction reaction (ORR). This ORR-EO system not only lowered applied voltage and conserved energy, but the synergistic peroxone (O 3 /H 2 O 2 ) reaction could increase hydroxyl radicals ( • OH) generation for organics elimination. However, a significant proportion of H 2 O 2 was left in the effluent of ORR-EO, which was a loss of resources and energy. In this study, a Fenton-like reaction for in-situ H 2 O 2 decomposition to generate active oxidation species was inserted by introducing MnO 2 into the cathodic catalyst layer, and the sole MnO 2 /CNTs-C/PTFE air-cathode could accomplish 90% of phenol degradation. When MnO 2 /CNTs-C/PTFE air-cathode combined with Ti/NATO anode in an ORR-EO system, all anodic oxidation, Fenton-like reaction, and peroxone took place to successfully generate • OH and singlet oxygen ( 1 O 2 ). Over 95% of TOC in phenol and landfill leachate bio-effluent was effectively eliminated, with 20% energy savings compared to the ORR-EO with CNTs-C/PTFE air cathode.
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