JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2025
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IF 4.9
Yazhou Liu,Jingwen Hu,Qiyong Zhu,Ping Yang,Yao Jiang,Xuezhi Zhang,Siying Wu
An innovative preparation approach was utilized to prepare bimetallic nanohybrid arrays of NiCo-LDH onto nickel foam through a hydrothermal technique. Then, 2,5-Dihydroxyterephthalic acid ligands were engaged to synthesize NiCo-MOF via a solvothermal method. Subsequently, an alkaline etching-induced technique transformed the bimetallic MOF back into LDH (designated as Et–NiCo-LDH), yielding a bimetallic hydroxide characterized by a denser nanohybrid array and a more abundant pore structure, thereby demonstrating exceptional specific capacitance. The resultant material exhibited a remarkable specific capacitance of 22.39 F cm −2 at a current density of 2 mA cm −2 (about 1194.16 F g −1 at 1 A g −1 .The loading capacity is 12 mg per square centimeter). After enduring 5000 galvanostatic charge-discharge cycles at a current density of 15 mA cm −2 , the material maintained 83.6 % of its initial capacity. Furthermore, when assembled into an asymmetric supercapacitor device with the as-synthesized Et–NiCo-LDH@NF composites serving as the positive electrode and activated carbon (AC) as the negative electrode, the device demonstrated an energy density of 671.42 Wh m −2 and a power density of 1399.99 W m −2 . Additionally, at a mass loading of 1 A g −1 , the energy density and power density were recorded as 45.04 Wh kg −1 and 350.37 W kg −1 , respectively, with a mass loading of 12 mg cm −2 . A capacity retention rate of 85.6 % was achieved after 5000 cycles. This study offers a straightforward method for producing uniform and dense bimetallic nanohybrid arrays tailored for applications in the capacitor field.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-15
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IF 5.3
Xiao Aijin,Li Meng,Hu Yiluo,Zhang Wei,Bai Huiping,Pan Xuejun,Jiang Fengzhi
A CuFeO 2 /NiCo-LDH heterojunction electrochemical sensor (LDH: layered double hydroxide) was developed for the sensitive detection of tetracycline (TC). The sensor was constructed by integrating ZIF-67-derived nanocage NiCo-LDH on nickel foam with CuFeO 2 , forming a p-n heterojunction that enhanced electron transfer and TC adsorption. The sensor exhibited bilinear detection ranges (0.00594 ~ 1 and 1 ~ 25 μM) and a low detection limit of 1.98 nM. Recoveries in real water samples ranged from 92.0 to 109.0%, with relative standard deviations not exceeding 4.5%. In situ Raman spectroscopy and density functional theory calculations confirmed the involvement of multiple redox pairs (Ni 3+ /Ni 2+ , Co 3+ /Co 2+ , Fe 3+ /Fe 2+ and Cu 2+ /Cu + ) and strong interfacial adsorption energy. This sensor presents a practical and efficient approach for onsite TC monitoring. Graphical
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PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yi Lu,Xiang Wang,Xiaofeng Xu,Pan Wu,Zongze Li,Guangyao Zhang
The increasing global demand for freshwater and clean energy necessitates innovative solutions that address both resource scarcity and environmental challenges. Herein, we present a 2D sandwich-like hybrid membrane, composed of bacterial cellulose (BC) and calcined CoAl-LDH nanosheets (CAL-T), fabricated via a layer-by-layer deposition strategy. This multifunctional membrane synergistically integrates photothermal evaporation and photocatalytic CO 2 reduction, leveraging the porous structure and narrow bandgap (1.37 eV) of CAL-T to enhance solar absorption and energy conversion. Furthermore, the BC matrix facilitates efficient water transport and mechanical stability, ensuring long-term operational performance. Under 1 kW ∙ m −2 solar irradiance, the BC/CAL-650 membrane achieves a water evaporation rate of 1.36 kg ∙ m −2 ∙ h −1 , surpassing most reported 2D evaporators, and a CO evolution rate of 8.78 μmol ∙ g −1 ∙ h −1 , significantly outperforming conventional photocatalysts. Furthermore, the BC matrix facilitates efficient water transport and mechanical robustness, ensuring long-term operational performance. These dual-functional capabilities, coupled with low-cost fabrication (~$0.0041 per membrane), demonstrate the membrane's superiority and practical potential in integrated solar-driven water purification and solar-to-fuel conversion. This work establishes a versatile platform for advancing next-generation hybrid materials to mitigate water scarcity and climate change challenges.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Guoxin Ding,Xiangxiang Chen,Yuexiang Hu,Yan Liu,Jun Liu,Guojun Cheng
The design of the material structure significantly influences microwave absorption properties. Enhancing electromagnetic performance requires the creation of diverse and heterogeneous interfaces to promote extensive wave reflections. This study developed 3D composites with point (NiFe-LDH), line (multi-walled carbon nanotubes, MWCNTs), and surface (reduced graphene oxide, RGO) architectures using ultrasonic stirring and a hydrothermal process, aiming to achieve improved electromagnetic properties. At a Ni:Fe ratio of 3:1, MWCNTs are interspersed within the layers of reduced RGO, forming a distinctive three-dimensional network structure. Additionally, on the MWCNTs/RGO composite's surface, NiFe-LDH flakes grow uniformly. The resulting composite exhibits an effective absorption bandwidth (EAB) of 5.2 GHz and a minimum reflection loss (RL min ) of −57.93 dB at a thickness of 1.64 mm. Furthermore, a thickness of 1.70 mm achieves a maximum EAB of 6.88 GHz. These results demonstrate that the MWCNTs/RGO/NiFe-LDH composite provides a broad microwave absorption bandwidth and high absorption efficiency, making it a promising candidate for developing advanced materials for microwave absorption applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Yuchuan Liu,Zongxue Yu,Xiuhui Li,Liangyan Shao,Haojie Zeng
In this work, the layered double hydroxide @ graphitic nitrogen carbide (LDH@g-C 3 N 4 @PDA) composite photocatalysts were fabricated by dopamine modification method. Then, the LDH@g-C 3 N 4 @PDA and graphene oxide (GO) composites were assembled on PVDF membrane to construct the photocatalytic self-cleaning composite membrane . The prepared PVDF/LDH@g-C 3 N 4 @PDA/GO composite membrane has excellent performance in contaminant separation and photocatalytic degradation. The rejection rates of methylene blue (MB), rhodamine b (RhB), gasoline, diesel, and petroleum ether were 100%, 94.61%, 96.74%, 93.22%, and 92.35%,respectively. More importantly, under visible-light irradiation, the membrane could achieve continuous and simultaneous flow-through separation and degradation of dye in short time. The rejection rate and the flux of organic dye were 99.28% and 397.14 L•m −2 h −1 bar −1 . The photocatalytic cycle experiment, which has been repeated 10 times, have also revealed the stability and high efficiency of PVDF/LDH@g-C 3 N 4 @PDA/GO membrane on account of its superior photocatalytic self-cleaning function. Therefore, this self-cleaning composite membrane would have a range of applications in wastewater treatment .
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Lin Sun,Yu Liu,Ming Yan,Weijing Liu,Xiaoying Liu,Weidong Shi
Reasonable structures are beneficial to improve the electronic transfer efficiency of the electrode. A novel two/three-dimensional structure with multiphase CoSe 2 (M-CoSe 2 ) nanoboxes fixed on CoAl-LDH nanoflowers on carbon paper (CP) is reasonably designed. The formation mechanism of M-CoSe 2 is systematically studied through the gradient change of the selenization conditions. Benefitting from the hollow structure of the ZIFs derivatives (carbon-nitrogen frameworks, CNFs), numerous charge transfer channels are provided. Furthermore, M-CoSe 2 with enhanced conductivity can furnish abundant active sites and a synergistic effect. The specific capacity of the optimal anode M-CoSe 2 /CNFs/CoAl-LDO/CP can reach 343.6 mAh g −1 at 1 A g −1 , which is equivalent to twice that of the monomer material. The hybrid-supercapacitor (M-CoSe 2 /CNFs/CoAl-LDO/CP//activated carbon) can provide a high energy density of 50.8 Wh kg −1 at 800 W kg −1 , and high stability (capacity loss rate of 3.2%, 10,000 cycles). Besides, LEDs can be lit by HSCs, demonstrating their application potential.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Chaoen Li,Yongbin Zhang,Li Che,HaiYang Gao,Honglin Gao,YuYang Zhou,Aiyi Dong
Reconstruction-derived oxyhydroxides possessing high-valent metal centers have been extensively investigated in recent years for their potential to enhance oxygen evolution reaction (OER) activity. However, the reconstruction processes and underlying reaction mechanisms of layered double hydroxides (LDHs) remain insufficiently explored. Investigating catalyst reconstruction and reaction pathways presents significant challenges. The Mn x Cr y LDH catalysts demonstrate enhanced OER performance after 20 cycles of cyclic voltammetry (CV) activation. Among them, the Mn 3 Cr 2 LDH 20th sample exhibits particularly low overpotentials of only 354.0 mV at room temperature and 272.4 mV at an industrial-relevant temperature (65 °C) to achieve a current density of 100 mA cm −2 . Furthermore, the catalyst maintains outstanding performance in alkaline natural seawater. CV cycling triggers rapid structural reorganization, leading to the formation of highly OER active β-MnOOH and simultaneously promoting Cr leaching. This Cr leaching generates abundant defect sites, which not only expose additional electroactive centers but also significantly increase the electrochemically active surface area (ECSA). Experimental evidence strongly suggests that the derived β-MnOOH phase boosts OER activity mainly via the lattice oxygen mechanism (LOM). This work highlights the robust potential of manganese-based OER catalysts for direct seawater electrolysis.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Ruonan Guo,Yiliang Zhu,Xiuwen Cheng,Junjing Li,John C. Crittenden
In this study, bimetal layered double hydroxides (Co x Cu y -LDHs) containing a carbonate interlayer were synthesized using coprecipitation with a variety of Co/Cu mole ratios. Meanwhile, the corresponding layered double oxides (Co x Cu y -LDOs) were prepared as controls. In this study, Electrical energy per order was performed to evaluate economic analysis. Correspondingly, we found that Co x Cu y -LDHs possessed a significantly better PMS activation capability than the corresponding metal oxide composite (Co 3 O 4 /CuO). Compared with other Co x Cu y -LDHs, Co 2 Cu 1 LDH possessed the best PMS activation capability for LOM degradation and the lowest electrical energy per order (EE/O) value during the reaction. Additionally, Co 2 Cu 1 LDH presented an excellent stability and worked over a wide pH range. The hydroxide states of Co(III), Co(II), Cu(I) and Cu(II) were all able to activate PMS, indicating that there were many active sites on the surface of Co 2 Cu 1 LDH. The involvement of radicals in this reaction system was determined via scavenger experiments and electron paramagnetic resonance (EPR). Meanwhile, it's worth noting that a mathematical model was developed to quantify the involvement of SO 4 − and OH. Subsequently, we determined PMS activation mechanism and LOM decomposition pathway for the PMS/Co 2 Cu 1 LDH system.
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高影响因子
APPLIED THERMAL ENGINEERING
·
2025
·
IF 6.9
Tianbao Liu,Weiguang Shi,Wei Li,Benxian Li,Xiaofei Fu,Zhiyong Chang,Sunhua Deng
Low to medium maturity shale oil, an essential energy source, faces challenges due to traditional pyrolysis methods, which are characterized by high energy consumption, low yield, and poor selectivity. Moreover, the inefficiencies in in-situ heat injection underscore the necessity for effective catalysts and improved heat transfer mechanisms involving water vapor. This study aims to elucidate the heat transfer enhancement and catalytic synergy of NiFe-layered double hydroxides (NiFe-LDH) in improving the in-situ pyrolysis efficiency of medium–low maturity oil shale via steam pyrolysis. Analyses conducted using GC–MS, Raman spectroscopy, and 13 C NMR demonstrated that the incorporation of NiFe-LDH with water vapor significantly enhances kerogen pyrolysis. This process increases the yields of alcohols, alkanes, and olefins by 1.32, 1.21, and 1.81 times, respectively, and it reduces the temperature needed to produce oil from kerogen. The catalyst helps turn aromatics into alcohols, olefins, and alkanes while breaking down residues into short-chain alkanes. It does this by weakening C–H bonds and removing hydrogen from methyl groups, ultimately reducing the energy required for heat injection by 38.17 %. Thermal and kinetic studies reveal that NiFe-LDH increases kerogen thermal diffusivity by 75.5 % and decreases specific heat capacity by 28.1 %, while elucidating the kinetic mechanism for a 59 °C elevation in the initial temperature of the main pyrolysis stage (increasing 6.1 times prefactor). A nucleation-reaction-order-geometric contraction multi-mechanism coupling model is established. This work proposes a novel “catalyst-water vapor pyrolysis-kerogen oxidation” synergistic enhancement theory, refining the multi-scale coupling mechanisms of heat/mass/chemical reactions during in-situ oil shale pyrolysis.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
cui baoyu,Jiehu Cui,Mao Tenghao,liu chang,wang shuxia,cai jialin,Chen Hongwu
The application of ammonium polyphosphate (APP) as an additive flame retardant to epoxy resin (EP) flame retardant is common, while, APP is poorly dispersed and easily agglomerated in EP. For solving the problem, in this paper, three kinds of ZnAl-layered double hydroxides (ZnAl-LDH1, ZnAl-LDH2 and ZnAl-LDH3) were successfully prepared by using sodium hydroxide, urea and triethanolamine as differences alkali source, respectively, which were used to strengthen the flame retardant performance of EP with APP. The results showed that the heat release peak and the smoke production rate peak were decreased by 58.2% and 44.2% after the addition of APP (5 wt%) and ZnAl-LDH3 (5 wt%) which is prepared with triethanolamine as the alkali source compared with that of Pure-EP.The addition of ZnAl-LDH3 will contribute to the dispersion of APP and the increase of the most C element in this process by SEM and XPS. The metal oxides were uniformly distributed on the surface of the carbon layer after combustion. The residual carbon value of ZnAl-LDH3 was smaller than that of ZnAl-LDH1-APP-EP and ZnAl-LDH2-APP-EP by the raman pattern. The heat release profile of APP-EP was better than that of ZnAl-LDH3-APP-EP, however, the tensile property and elongation at break of ZnAl-LDH3-APP-EP are better than that of APP-EP.
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高影响因子
CATALYSIS TODAY
·
2021
·
IF 6.766
Xuefeng Liu,Yuantao Pei,Liang Huang,Wen Lei,Faliang Li,Yage Li,Haijun Zhang,Quanli Jia,Shaowei Zhang
The development of high-efficiency, stable and low-cost electrocatalysts is a matter of cardinal significance for large-scale electrolytic hydrogen production from water. In this study, we report a hierarchical electrocatalyst of flower-like FeNiP-LDH (FeNiP on layered double hydroxide) loaded on ultrahigh porosity Co foam (CF). The structure/component superiorities and hydrogen evolution reaction (HER) performance of this electrode were examined in detail. In alkaline solution, the resulting FeNiP-LDH/CF yields a current density of 10 mA/cm 2 at an overpotential of − 39 mV, which is superior than most documented transition metal phosphides electrocatalysts and even Pt catalyst (~ −53 mV). In particular, this electrode with an undamaged microstructure can maintain its HER activity over 16 h at high current density of 500–600 mA/cm 2 . Such remarkable HER performance originates from the satisfactory porous nature of Co foam as well as the special surface structure and electronic properties of phosphide/hydroxide. This work not only offers a viable modular approach for the synthesis of high-performance HER electrocatalysts, but also allows an in-depth understanding of structure-activity relationships of multistage 3D materials for energy and catalysis application.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Weikang Hu,Qiang Liu,Tianxi Lv,Fang Zhou,Yijun Zhong
Bimetallic CoNi-LDHs as catalyst candidates for OER have attracted increasing interests due to their high catalytic activities, low cost and earth abundance. In this work, a series of Co x Ni-LDH nanosheets were synthesized by a chemical co-precipitation method. The impact of Co roles on OER catalytic activities, oxidation conversion of nickel metal ions and resistance of charge-transfer reactions (R ct ) was investigated. The electrochemical dynamic behavior of bivalent Co II was characterized by CV and EIS in combination with XPS. The surface morphologies and microstructure were studied by SEM and TEM, respectively. The results show that Co II is irreversibly oxidized to Co III OOH at interface in the first anodic polarization process prior to the occurrence of OER. The surface reconstruction with the formation of Co III OOH species reduces the R ct and favors the oxidation conversion of Ni II hydroxide into Ni III (oxy)hydroxide at a relatively lower applied potential. The co-existence of these high-valence-state metals (Co III and Ni III ) on the LDH surface further boosts the catalytic activity and enhances the OER performance. The OER activity of the Co x Ni-LDHs increases with increase of the Co: Ni ratio, and reaches the maximum as the Co:Ni ratio raises to about 1.8:1.0. The Co 1.8 Ni-LDH shows the most active OER catalyst with an overpotential of 290 mV at 10 mA cm −2 Geo and a Tafel slop of 66 mV dec −1 , as well as has a higher i ECSA and TOF. The carbon-free pasted Co 1.8 Ni-LDH electrode on Ni foam also exhibits excellent durability at 100 mA cm −2 in 1M KOH at room temperature.
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高影响因子
危险品化学品经营许可证（带存储）