JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Xiaohui Guan,Jingyang Chen,Enze Zhu,Penggang Yin,Liu Yang,Xin Guan,Guangsheng Wang
Layered double hydroxides (LDHs) are promising electrode candidates for supercapacitors. However, limitations like inferior cycling stability and unsatisfactory charge storage capability at low temperatures have exerted negative effects on their applications. Herein, a novel synthetic process has been elaborately designed and provided to have the composition and structure of the C/N-NiCoMn-LDH/Ag (C/N-CNMA) delicately regulated. Both the experimental and theoretical researches unveil that the incorporated manganese species and elemental silver could dramatically modulate the bandgap, crystallinity and surface electron structure of the LDH , leading to the remarkable improvement in its conductivity, exposed active sites and intrinsic electrochemical activity, and thus the OH* and O* adsorption free energy could be remarkably optimized, even at low temperatures. In addition, the low crystallinity C/N-CNMA is of great electrochemical compatibility with both the KOH aqueous electrolyte and the isobutyl alcohol (IPA) modulated organohydrogel electrolyte. By means of adjusting the solvation and hydrogen bonding in the electrolytes, the assembled hybrid supercapacitors deliver excellent energy density, power density and cycling stability in the temperature range of -30 to 25 °C. Specifically, the gel electrolyte with IPA as the anti-freezing functional additive displays high flexibility and ionic conductivity at low temperatures.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Keqing Zhou,Kaili Gong,Feiyan Gao,Lian Yin
The creation of high-efficient MXene-based flame retardants to cope with the fire hazards of polymer composites remained an intractable challenge. Hence, this work explored a facile strategy to synthesize MXene-based nanohybrids (MXene@LDH) by in situ growth of layered double hydroxides (CoAl-LDH) on the surface of MXene in anticipation of constructing an efficient flame retardant system. The results indicated that the integration of LDH prevented the stacking of MXene nanosheets and enhanced the dispersion of MXene in EP matrix, endowing EP composites with excellent thermal properties and flame retardancy. With the addition of 2 wt% MXene@LDH, EP composites exhibited reduced the maximum mass loss rate (R max ) of 28.5%, increased residual char and led to 25.3% reduction in PHRR and a drop of 24.4% in THR, compared to those of neat EP. Furthermore, EP/2 wt% MXene@LDH composites also demonstrated superior smoke suppression performance, mainly reflected by the 38.5%, 37.8%, 33.8% and 31.2% reduction in PSPR, TSP, PCO and PCO 2 , respectively, together with a 52.0% decline in smoke factor (SF), compared to those of pure EP. The improved fire safety of EP composites was attributed to the catalytic charring and attenuation effect of the transition metal oxides , coupled with the barrier effect of the nanosheets and the cooling effect, gas-phase dilution effect of LDH.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Tariq Ali,Yiwei Li,Bingjie Fang,Saleem Raza,Yeyuan Xiao
Photocatalysis can decolorize dye-laden wastewaters using light, but practical catalysts often suffer from narrow absorption, charge recombination, and stability limits. Here we synthesize a carbonate-intercalated cobalt–aluminum layered double hydroxide hosting cobalt-oxide nanocluster (CoAl-LDH/CoOx) via a one-pot hydrothermal route and evaluate its performance for dye decolorization and UV/H2O2 treatment of real textile wastewater. Under UV irradiation, CoAl-LDH/CoOx accelerates discoloration of methyl orange (MO) and Congo red (CR), following pseudo-first-order kinetics (e.g., MO: ∼98% removal at 5 mg L−1 in 100 min; CR: ∼100% at 100 mg L−1 in 100 min; kapp up to 0.14 min−1). On real textile wastewater (ADMI0 = 608.1), UV/H2O2 with 0.5 g L−1 catalyst achieved ∼80% American Dye Manufacturer's Institute (ADMI) removal in 120 min at 48.96 mM H2O2; outdoor sunlight tests removed 82.5% (raw influent) and 50.8% (biologically treated effluent) over 20 h. Scavenger tests and EPR spin-trapping implicate h+ and ˙O2− as dominant species under UV, with ˙OH contributing when H2O2 is present. Five-cycle tests indicate stable activity. The one-pot CoAl-LDH/CoOx heterostructure provides a robust, recyclable platform for interfacial charge-transfer-assisted photocatalysis on realistic effluents and motivates follow-up on mineralization and leaching.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Yuchan Liu,Wenjing Gao,Qintong Huang,Chenyao Chen,Rongkai Ye,Xiaoxiong Liu,Jianqiang Hu
Constructing nonprecious metal-based telluride heterointerfaces provides an effective strategy for developing efficient bifunctional catalysts for overall water splitting. However, there still remain major challenges for catalysts that rely on constructing heterojunction interfaces to obtain high-active sites with optimized electronic structures to achieve an efficient oxygen evolution reaction (OER). Herein, hierarchical NiTe/NiFeCe-LDH core–shell heterojunction nanoarrays with crystalline/amorphous interfaces were synthesized based on the Ce doping and interface engineering strategy. Benefiting from the high conductivity of crystalline NiTe nanorods and abundant active sites in amorphous NiFeCe-LDHs, the NiTe/NiFeCe-LDH heterojunction nanoarrays exhibited an excellent OER performance and long-term stability of more than 120 h in an alkaline medium, achieving a low overpotential of ∼247 mV at 100 mA·cm–2, which was ∼44% lower than commercial RuO2 (∼443 mV). Moreover, the NiTe/NiFeCe-LDHs achieved a current density of 10 mA·cm–2 at a low voltage of 1.45 V in overall water splitting. Density functional theory calculations revealed that Ce doping and the strong electronic interaction at the crystalline/amorphous interface of the NiTe/NiFeCe-LDHs could modulate its electronic structure by upward-shifting the d-band center of the Ni sites. This modulation optimized the binding energies of oxygen intermediates and consequently enhanced the OER performance of the NiTe/NiFeCe-LDHs. This research presents a novel approach for designing efficient overall water-splitting electrocatalysts through the synergistic doping–interface strategy.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jingkai Hu,Huaxin Lin,Zhuowei Cheng,Jianmeng Chen,Ruiqi Zhu,Dongzhi Chen,Zhaoyang Lu
Volatile organic compounds (VOCs), particularly toluene, pose significant environmental and health challenges. This study addresses the limitations of ZSM-5 zeolite in humid environments by integrating Si/Al ratio optimization with hydrophobic modification via layered double hydroxide (LDH) coatings. H-ZSM-5 zeolites with Si/Al ratios of 25, 85, and 300 were synthesized using hydrothermal methods, revealing that higher Si/Al ratios enhance specific surface area (387.67 m 2 /g for Si/Al = 300) and mesopore volume (66.4 %). However, humidity reduced the adsorption capacity (e.g., ZSM-5(300) decreased from 85.37 ± 3.60 to 65.76 ± 2.26 mg/g at 80 % RH). To mitigate moisture interference, three LDH-coated composites were fabricated: self-assembled (ZZ-300@LDH), co-precipitated (GC-300@LDH), and sol-gel-derived (RN-300@LDH). Among these, GC-300@LDH exhibited superior hydrophobicity (water contact angle: 53°) and a hierarchical pore structure (mesopore volume: 0.3688 cm 3 /g), achieving a toluene adsorption capacity of 94.43 ± 1.43 mg/g under 80 % RH—43.6 % higher than ZSM-5(300). The dual adsorption sites and enhanced surface roughness contribute to prolonged breakthrough time (6.6 ± 0.3 min) and stable regeneration over five cycles. Comparative analysis with industrial zeolites highlights GC-300@LDH's potential for integration into zeolite rotor-RTO systems, offering a scalable solution for humid industrial VOC treatment.
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JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Hong Chen,Jianhui Lin,Ning Zhang,Liangzhe Chen,Shuiping Zhong,Yao Wang,Wengong Zhang,Qidan Ling
Adsorption is recognized as one of the most promising technologies applied to remove heavy metals from contaminated water. However, the adsorption efficiency often decreases because of the aggregation and loss of adsorbents. Herein, a novel adsorbent was synthesized by intercalation ethylenediaminetetraacetic acid (EDTA) into layered double hydroxides (LDH) and subsequent encapsulated into PAN polymer matrix using electrospinning. The synthesized electrospun nanofiber membrane (MgAl-EDTA-LDH@PAN) was found to combine the advantages of LDH@PAN nanofiber membrane (high surface area, easy to separate, free from aggregation and loss) and EDTA (powerful chelating agent). The adsorption performance of the MgAl-EDTA-LDH@PAN was evaluated using Cu(II) as target metals by varying experimental conditions such as pH, contact time, initial adsorbent dosage, and temperature. The maximum adsorption capacity of MgAl-EDTA-LDH@PAN was 120.77 mg/g with the initial Cu(II) concentrations ranging from 0.6 to 40 mg/L. MgAl-EDTA-LDH@PAN was also used in real industrial contaminated water treatment, and the final effluent was approximate to class-I criteria of the National Wastewater Discharge Standard of China. (GB 8978-1996). In addition, Cu K-edge XAS and XPS analyses were applied for unraveling the adsorptive performance of MgAl-EDTA-LDH@PAN by revealing the molecular-level mechanism of Cu(II) uptake.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jianan Qu,Jinjuan Xue,Yanli Qi,Kaiwen Huang,Mingxin Wang,Yuming Zhou
Passive daytime radiative cooling provides a promising zero-energy solution to reduce energy consumption and carbon emissions in building cooling. While cellulose-based radiative coolers have gained research focus, their efficiency remains constrained by inadequate spectral properties and parasitic heat gain. Herein, a novel silylated bacterial cellulose/MgAl-layered double hydroxide (MBC/LDH) composite aerogel with multi-scale architecture and nano/micro porous structure was fabricated via facile freeze-drying. Within this architecture, 1D bacterial cellulose (BC) nanofibers serve as the matrix, while methyltrimethoxysilane (MTMS) silylation simultaneously enables crosslinking, hydrophobization, and enhanced emissivity through Si-O-Si/Si-O-C bonding. Incorporating 2D MgAl-LDH imparts flame retardancy and further modulates infrared emissivity. This synergistic design yields robust mechanical strength and exceptional optical properties with 96.5 % solar reflectivity and 92.3 % infrared emissivity. Outdoor testing (493.2 W·m −2 solar intensity) achieved a 6.3 °C sub-ambient cooling effect, significantly surpassing pure BC aerogel (1.9 °C). The aerogel also exhibits outstanding flame resistance (LOI = 34.1 %), ultralow thermal conductivity (0.03478 W·m −1 ·K −1 ) and high water contact angle (142°), providing essential thermal insulation, flame retardancy and self-cleaning properties. Year-round simulations demonstrate 41.2 % cooling energy savings when applied to roofs and walls. This work provides a pathway for developing advanced sustainable BC-based composite aerogels for energy-efficient building cooling.
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Journal of Energy Storage
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2024
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IF 8.9
Ye Qu,Yanzi Zhang,Yali Zhang,Jun Song,Zhaoen Liu,Weixing Rao,Yu Liu
The multi-component synergy of electrode materials and structural engineering are crucial for high-performance supercapacitors. Herein, a novel sandwich-like MXene@NiCo-layered double hydroxides (LDHs)/Co 9 S 8 nanostructure is rational synthesized, which with rich pores can significantly facilitate the diffusion of electrolyte ions and boost high charge transfer capability. Besides, the interaction forces between components promote the integration of multidimensional materials, and the resulting hybrid structure significantly improves the electrochemical efficiency through synergistic effects. Remarkably, the obtained MXene@NiCo-LDH/Co 9 S 8 composites exhibit a high specific capacitance of 808.0 F g −1 at a low current density of 1 A g −1 , the value is nearly 1.4 times MXene@NiCo-LDH (586.2 F g −1 ), as well as good rate capability (512.0 F g −1 at 10 A g −1 ). Besides, the fabricated supercapacitor device (MXene@NiCo-LDH/Co 9 S 8 //activated carbon) showed an outstanding energy density of 96.4 Wh kg −1 at 800 W kg −1 ), and good cyclic performance of 70.26 % capacitance retention even over 9000 cycles. This research may provide a promising strategy for developing two-dimensional layered materials as an electrode material in energy storage applications.
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Journal of Magnesium and Alloys
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2025
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IF 13.8
Zexuan Yang,Yazhou Wang,Xia Lin,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun,Yong Shen Chua
Magnesium-based hydrogen storage materials, such as MgH 2 , have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH 2 . In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH 2 . The synthesized NiCo-MOF/V-O-doped MgH 2 system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H 2 was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H 2 in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol −1 which is significantly lower than that of the ball-milled MgH 2 (i.e., 118.649 ± 2.825 kJ ·mol −1 ). It was therefore inferred that during dehydrogenation process, a Mg 2 Ni/Mg 2 NiH 4 hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH 2 . These experiments provide new perspectives on the commercial application of MgH 2 .
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Advanced Healthcare Materials
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2025
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IF 9.6
Hongwei Xu,Shuairu Zhu,Walaa Al-Mathagi,Mei Yang,Wanding Cui,Xiaohua Yuan,Xuping Sun,Yonggang Wei,Binwu Ying
Primary liver cancer remains a significant global health challenge, with the majority of patients diagnosed at an unresectable stage, further complicated by liver dysfunction due to cirrhosis. To address these clinical hurdles, nanozyme-based catalytic therapy has emerged as a promising strategy. However, its therapeutic efficacy is often limited by self-protective mechanisms associated with the tumor microenvironment (TME), particularly the overexpression of glutathione (GSH) and hypoxia-induced metabolic adaptation. In this study, a quaternary medium-entropy layered double hydroxide (LDH) nanozyme, denoted as NiFeMnCu-LDH is developed. This nanozyme exhibits peroxidase-like, catalase (CAT)-like, and oxidase-like activities, facilitating the cascade generation of reactive oxygen species (ROS). Simultaneously, the oxygen produced by CAT mitigates hypoxia, while the glutathione peroxidase-like activity drives the depletion of tumor antioxidants, effectively reprogramming the TME. Further in vitro experiments demonstrated that efficient production of ROS and scavenging of GSH induced substantial apoptosis in liver cancer cells. Additionally, mouse liver tumor models showed robust inhibition of tumor growth without systemic toxicity. This findings provide a framework for the precise engineering of nanozymes in advanced liver cancer treatment, addressing critical barriers within the TME and offering valuable insights into a mimetic multi-enzyme synergy for translational applications.
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Journal of Materials Chemistry A
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2025
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IF 9.5
Saiya Guo,Huihui Li,Manman Shi,Qianqian Zhu,Jieding Wei,Qingqing Zha,Yonghong Ni
Layered double hydroxides (LDH) have attracted great research interest as catalysts for electrochemical water splitting. However, further enhancing the electrocatalytic activity of LDH materials is still a huge challenge. Here, we designed a mild wet chemical route to successfully prepare conductive metal-organic frameworks (cMOFs) modified hollow CoNiFe-LDH nanocages.Firstly, ZIF-67 nanocubes were etched by Ni 2+ and Fe 3+ ions in turn to form hollow CoNiFe-LDH nanocages. Then, hollow CoNiFe-LDH nanocages reacted with 2,3,6,7,10,11hexahydroxytriphenylene (HHTP) to obtain cMOFs modified hollow CoNiFe-LDH nanocages (labeled as CoNiFe-HHTP). Electrochemical measurements showed that the as-obtained CoNiFe-HHTP exhibited excellent electrocatalytic oxygen evolution reaction (OER) performances. In 1 M KOH solution, the as-obtained CoNiFe-HHTP merely required 209 mV overpotential to deliver a current density of 10 mA cm -2 , with a low Tafel slope of 36.81 mV dec -1 . Also, the as-obtained CoNiFe-HHTP could stably run more than 240 h at a current density of 10 mA cm -2 , exhibiting superb long-term stability. The present work provides a promising strategy to promote the electrocatalytic activity of cheap transition metal LDH materials for electrochemical water decomposition.
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Small
·
2025
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IF 12.1
Yongping Qu,Huajun Zhou,Yuzhen Zhang,Peihua Zhao,Kai Yuan,Rui Zhou,Hui Gao,Yanzhong Wang
Seawater electrolysis is a promising route for hydrogen production. However, the elevated concentration of Cl − in seawater can cause the serious corrosion of electrode materials, which limits the large-scale application of seawater splitting for the generation of green hydrogen. Herein, nickel iron layered double hydroxide@Ag/iron foam (NiFe-LDH@Ag/IF) composites are synthesized using a two-step method at room temperature. The introduction of Ag not only induces the electron density redistribution of NiFe-LDH to promote the formation of NiFeOOH as the catalytically active sites, but also impress the corrosion of chloride ions during the seawater oxidation. The as-prepared NiFe-LDH@Ag/IF only requires a low overpotential of 255 mV at a current density of 500 mA cm −2 in alkaline solution, and it can stably operate for 1000 h without degradation. Importantly, the formed AgCl nanoparticles loaded on the surface of NiFe-LDH nanosheets can effectively prevent the corrosive effect of Cl − during the seawater oxidation process. Thus, NiFe-LDH@Ag/IF can maintain high catalytic activity and work stably for 1000 h at high current density of 500 mA cm −2 for seawater oxidation. This study presents a simple method for preparing self-supported electrocatalysts with excellent corrosion resistance and high catalytic activity in alkaline seawater oxidation.
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