APPLIED CLAY SCIENCE
·
2015
·
IF 2.467
Jun Qu,Xiaoman He,Bentao Wang,Lihua Zhong,Lei Wan,Xuewei Li,Shaoxian Song,Qiwu Zhang
In this study, we introduced a solvent-free mechanochemical route to synthesize Li–Al layered double hydroxide through a two-step grinding of LiOH and Al(OH) 3 , in which the mixture powder with Li/Al molar ratio at 1/2 was first dry ground for 2 h and then wet ground for another 1 h with water addition without any heating operation. The as-prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TG), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The products possessed highly crystalline of Li–Al LDH phase with no evident impure phases, presenting an easy and effective preparation of Li–Al LDH by using solvent-free mechanochemical approach.
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ENERGY & FUELS
·
2025
·
IF 5.3
Xiaoteng Cui,Mingsheng Luo,Zhi Yang,Roshni Rahman,Ziyuan Li,Wenshuai Yang,Lingman Xia
As a greenhouse gas, carbon dioxide is also a rich carbon resource that can be effectively utilized to tackle the global warming crisis. This paper presents an in-depth investigation of the impact of the Cu content on the structure of Cu–Zn–Al layered double hydroxides (LDHs) from a novel perspective. The CO2 hydrogenation performance of the derived catalyst, the LDO, is also evaluated in the methanol synthesis reaction. All catalysts were evaluated at 3.0 MPa, a carbon dioxide to hydrogen ratio of 3, and a space velocity of 3600 mL·g–1·h–1. The results from this work indicate that the catalyst with a Cu:Zn ratio of 11:4 exhibited the highest methanol selectivity of 63.9% at 230 °C. At 250 °C, the catalysts also yielded the highest methanol selectivity of 50% only, along with a CO2 conversion as high as 17.8%. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) data suggest that the CO2-to-methanol reaction follows the formate (HCOO*) mechanism for this catalyst. Results from this work offer a novel approach to designing Cu-LDH-based catalysts, which offers valuable insights for the efficient chemical utilization of CO2.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Guobin Yu,Xiaoya Liu,Weiyuan Huang,Shixin Wang,Jiqiang Zhan,Lu Ma,Hongpeng Li,Xiaojing Lin,Tongchao Liu,Khalil Amine,Hongsen Li
Rechargeable aluminum-sulfur batteries (Al-S) are emerging as a promising alternative energy storage system beyond lithium-ion batteries due to their high energy density, abundant material resources, and economic efficiency. However, their practical application remains challenged by sluggish conversion kinetics, polysulfide shuttling, and low sulfur cathode utilization. While extensive studies have focused on enhancing polysulfide adsorption through catalytic strategies, the roles of electronic structure in dictating catalytic performance remain underexplored. Here, this work unveils the critical effect of unpaired electronic structure on the catalytic performance of single atom ferromagnetic transition metals through a systematic evaluation of three typical atomically dispersed ferromagnetic single atoms—Fe, Co, and Ni—supported on porous carbon (denoted as PC-SAFAs). Comprehensive characterizations and density functional theory (DFT) calculations reveal that the PC-SAFe catalysts, exhibiting the highest spin polarization arising from unpaired electrons, demonstrate the strongest interactions with polysulfide, thereby facilitating rapid and reversible polysulfide conversion reactions. Consequently, Al-S batteries incorporating the optimized PC-SAFe cathode achieve an impressive specific capacity of 508.8 mAh g −1 at 1.0 A g −1 after 500 cycles, along with much improved rate capability. This work provides a deeper understanding of the role of electronic structure in catalytic chemistry, and offers new insights for developing high-performance Al-S batteries.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 48
·2303072
·
IF 19
Renqian Tao,Hongwei Fu,Caitian Gao,Ling Fan,Erqing Xie,Wang Lyu,Jiang Zhou,Bingan Lu
Electrolytes are highly important for aqueous Al ion batteries (AAIBs). However, Al metal anode usually has poor reversibility of plating/tripping, resulting in low Coulombic efficiency (CE) and poor cycling stability by using traditional Al ion electrolyte. Herein, a novel type of aqueous Al ion electrolyte with polyethylene glycol (PEG) as the primary skeleton for solvated Al ions is proposed, named as PEG-Al@H. Outstandingly, an Al electrolyte interface (AEI) is generated on the Al metal surface during galvanostatic charging process by polymerization of PEG. It is proved that AEI, acting as the protective layer, effectively mitigates the side reaction caused by the rapid kinetic in aqueous electrolyte and prevents Al metal anode from deeply corroding. Moreover, PEG disrupts the hydrogen bond of the solvent in the electrolyte, extending the working temperature of AAIBs. The design that a full-cell consisting of PEG-Al@H as the electrolyte, potassium manganese hexacyanoferrate as the cathode, Al metal as anode can run over 20 000 cycles at 500 mA g −1 , with an average CE higher than 95%. More importantly, even at −5 °C, for the first time, an initial capacity of 16 mAh in a pouch-cell is achieved and maintain roughly 87% of capacity after 5500 cycles.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Daixiong Zhang,Xinxi He,Mei Huang,Qing Xiang
Electrophoretic deposition (EPD) is a promising method for fast-preparing thermite (Al/MO x ) coatings and other energetic coatings with the advantages of simplicity, low cost, and wide adoptability for complex shapes. However, post-sintering treatment is unsuitable for enhancing the poor adhesion of electrophoretic Al/MO x coating and other energetic coatings because of the contradiction between the sintering temperature and the trigger temperature of thermite reaction. In this work, electrophoretic Al/MO x (i.e., Fe 2 O 3 ) coatings with high adhesion were designed by using other MO x nanoparticles (i.e., NiO) prepared via oil-phase synthesis (named as O-MO x ) as an outer coating. DSC curves show that the value of heat release in the electrophoretic NiO-Al/Fe 2 O 3 coating is 2568 J g −1 . The combustion test successfully confirms a violent and quick energy releasing of the designed Al/Fe 2 O 3 coating. More attractively, this strategy can also be employed to prepare many other kinds of Al/MO x coating (i.e., CuO, MoO 3 , WO 3 , Bi 2 O 3 ) or energetic coating (i.e., B/Ti) with good adhesion via EPD. In summary, this study provides a general strategy for electrophoretic preparation of Al/MO x coatings with high adhesion, excellent thermodynamic properties and electrical explosion performance, which would solve the key issue for preparing Al/MO x coatings through EPD technology.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu Wu,Wenting Ji,Zhihua Xu,Yuqin Huang,De Li,Yuanchuan Li,Yong Chen
In Li-ion batteries (LIBs), the phenomenon of memory effect has only been found in a few two-phase electrode materials such as olivine LiFePO4, anatase TiO2, and Al-doped Li4Ti5O12, which is attributed to the Li-ion exchange between adjacent vacant Li and Fe sites in LiFePO4 and the Al-ion exchange between 8a and 16c sites in Al-doped Li4Ti5O12. Here, the Al-doped LiCrTiO4 was successfully synthesized by the spray-drying method and high-temperature sintering, which also exhibits the memory effect during only the charging process. The X-ray diffraction (XRD) and electrochemical results indicate that the saturated Al-doping level corresponds to the Al:Ti ratio of ca. 0.25 for LiCrTiO4, and the memory effect increases with the Al-doping level evidently. According to the in situ XRD and magic-angle spinning nuclear magnetic resonance results, the Al3+ ions are doped at the 8a sites, the Li ions hop between 8a and 16c sites during the charging and discharging processes, and the Li ions further hop from the 16c site to the 16d site after deeply discharging and move back in the subsequent charging process. Therefore, the memory effect of Al-doped LiCrTiO4 should originate from the reversible exchange of Li ions between 16c and 16d sites, and it is a common strategy to cause the memory effect in LIBs by inducing another reversible ionic migration in the electrode materials to affect the normal Li-ion extraction/insertion.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Duoduo Yang,Junhao He,Kaishen Chen,Yiping Cheng,Zhiyu Liu,Chengyun Zhang
Surface-enhanced Raman scattering (SERS) is a powerful, label-free technique for trace-level molecular detection; however, its broad application is limited by the lack of low-cost, scalable, and reproducible substrates. Here, we introduce a facile route to large-area SERS nanoplatform using liquid-assisted femtosecond (fs) laser direct writing (FLDW) in sucrose solution, followed by thermal evaporation of a thin Au nanofilm composed of nanoparticle clusters on aluminum-alloy substrates. By optimizing sucrose concentration and fs laser power, densely packed arrays of nanocones, nanoplates, and nipple-like protrusions are produced, serving as robust scaffolds for plasmonic hotspots. After thermal evaporation, the substrate exhibits super hydrophobicity with water contact angle (WCA) ∼157°, which concentrates analyte droplets and further amplifies Raman signals. Using Rhodamine 6 G (R6G) and malachite green (MG) as probe molecules, the limits of detection (LODs) were determined to be 3.5 × 10 −14 M for R6G and 6.6 × 10 −11 M for MG, with corresponding enhancement factors (EFs) of 1.19 × 10 11 and 6.13 × 10 7 , respectively. Uniformity tests yielded relative standard deviations (RSDs) below 4 %, and cycle reusability assays showed < 15 % signal loss. After 150 days, more than 80 % of the initial SERS signals were retained, confirming long-term stability under ambient conditions. Simulation results reveal intense electromagnetic hotspots localized at nanostructure tips and junctions, accounting for the substrate’s exceptional SERS performance. This straightforward, contamination-free approach enables scalable production of durable, high-performance SERS substrates for environmental monitoring, food safety, and biomedical diagnostics.
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MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Zhemin Zou,Jie Wang,Jun Qu,Panfei Dong,Zhigao Xu
The ionic rare earth elements (REEs) was mainly recovered by in-situ leaching process. The concentration of rare earth ions in the leaching solution after long-term leaching process would be too low for traditional precipitation process for REEs recovery. The adsorption process was ideal for the low concentration REEs recovery. In this study, Zn–Al LDH precursor were successfully synthesized by mechanochemical method for the adsorption of REEs (including La − , Eu 3+ and Er 3+ ). X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron energy spectrometer (XPS), and Zeta potential test was applied for adsorption mechanism illustration. The maximum adsorption capacity of the Zn–Al LDH precursor for La 3+ , Eu 3+ and Er 3+ reached 492 mg/g, 346 mg/g, and 1154 mg/g which was significantly higher than other types of adsorbents. The adsorbed REEs on the Zn–Al LDH was hard to be desorbed. The Zn–Al LDH precursor after REEs adsorption could be directly used as high content REEs resources for further process.Therefore, the Zn–Al LDH precursor could be a promising adsorbent for REEs recovery in practical application.
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高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 6
·066308
·
IF 1.449
Xie Hui,Yu Jiakang,Jiang Dapeng,Liu Jipeng
Graphite flakes (Gf) were coated with Cr7C3 by salt bathing coating, and the Cr7C3 coated Gf reinforced Al matrix composites were prepared by gas pressure infiltration. Surface morphology of uncoated and Cr7C3 coated Gf, the interfacial characteristics of Cr7C3 coated Gf/Al composites were observed by SEM. Surface of Cr7C3 coated Gf is smooth without defects, the Cr7C3 coating effectively improved the wettability. When volume fraction of Gf is below 50%, the experimental value of thermal conductivity (TC) is basically consistent with the calculated value of the EMA model. When volume fraction of Gf is over 50%, the growth of deviates from the EMA model curve. Coefficient of thermal expansion (CTE) of composite was predicted by Kerner model and Orientation Disc model, because Kerner model does not consider the anisotropy of Gf and inaccurately predict the change of CTE. However, the Orientation Disc model can predict the change of CTE better, but there is certainly deviation.
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JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Hongchao Wang,Jian Wang,Zhijiang Jin,Hongxin Li,Haoran Dou,Jie Shi,Cundi Wei,Qian Gao
A high-performance flexible Al-air battery with liquid alloy-activated anode system is developed for wearable electronics . By constructing activation interface composed of Ga–In liquid particles (GILPs) on the Al anode, the electrochemical performance of the flexible Al-air battery is enhanced. This work validated that GILPs can not only serve as active sites for the oxidation reaction of Al atoms to avoid the generation of passivation film, but also can further expand the active Al range and improve overall performance of the battery. These GILPs also exhibit satisfying electrical conductivity to reduce the mechanical loss of the Al anode during discharge, resulting in a high energy utilization of the battery. The Al-air battery with 150 μg cm −2 GILPs displays remarkable capacities of 2345 mA h g −1 at the current density of 1 mA cm −2 , 1.6 times higher than that of Al-air battery without GILPs loading. Amplification experiment of Al anodes’ thickness and area are performed. The results indicate that the lifetime of battery can be extended by scaling up thickness of Al anode, and overall battery amplification efficiency is greater than 93.5%. This study opens up a prospect for the application of Al-air batteries in the field of flexible wearable power supply devices.
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高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Jiguo Tu,Xiang Xiao,Mingyong Wang,Shuqiang Jiao
In this work, hierarchical flower-like MoS2 microspheres synthesized through a facile hydrothermal approach are used as a cathode for aluminum-ion batteries. They exhibit an initial specific discharge capacity of 153.6 mAh g–1 at a current density of 50 mA g–1 and deliver a stable capacity of 112.2 mAh g–1 with a Coulombic efficiency of 92.4% over 100 cycles on account of the unique hierarchical structure, which provides abundant space for aluminum storage. Moreover, the characterization results confirm that Al3+ ions can be intercalated into the MoS2 phase to form AlxMoS2 during the discharge process. The density functional theory calculation results indicate that the structure of MoS2 can be stabilized during the intercalation/deintercalation process.
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APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Min Zhao,Yihui Li,Ziang Zhao,Yuan Lyu,Wei Lu,Hejun Zhu,Yunjie Ding
Mn-doped spinel oxides CoAl 2 O 4 marked as CMA-m (m = Co/Mn atom ratio) herein were synthesized and evaluated for the first time as supports of Co-based Fischer-Tropsch synthesis (FTS) catalysts. HAADF-STEM images showed that Mn doping caused more crystal defects on the surface of CMA-m grains, which may provide more attachment sites for cobalt loading, leading to much smaller Co 0 particle size of 15Co/CMA-m than that of 15Co/CoAl 2 O 4 . Data of H 2 /CO chemisorption showed that the interaction of highly dispersed Co 0 with lattice Mn-doped CMA-m grain has a promotive effect on CO adsorption capability. FTS evaluation results demonstrate that 15Co/CMA-20 showed the highest CO conversion, C 5+ selectivity and C 5+ STY, benefiting from its high Co 0 dispersion and CO chemisorption capability as a result of suitable Mn doping into the lattice of CoAl 2 O 4 , which was confirmed very different from the influence of impregnated Mn oxide over CoAl 2 O 4 .
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危险品化学品经营许可证（带存储）