Research
·
2022
·
IF 11.036
Zihao Wang,Yuchi Liu,Jianxiong Xing,Zhicui Song,Aijun Zhou,Wei Zou,Fu Zhou,Jingze Li
Constructing a three-dimensional (3D) multifunctional hosting architecture and subsequent thermal infusion of molten Li to produce advanced Li composite is an effective strategy for stable Li metal anode. However, the pure liquid Li is difficult to spread across the surface of various substrates due to its large surface tension and poor wettability, hindering the production and application of Li composite anode. Herein, heteroatomic Ca is doped into molten Li to generate Li-Ca alloy, which greatly regulates the surface tension of the molten alloy and improves the wettability against carbon cloth (CC). Moreover, a secondary network composed of CaLi 2 intermetallic compound with interconnected ant-nest-like lithiophilic channels is in situ formed and across the primary scaffold of CC matrix by infiltrating molten Li-Ca alloy into CC and then cooling treatment (LCAC), which has a larger and lithiophilic surface to enable uniform Li deposition into interior space of the hybrid scaffold without Li dendrites. Therefore, LCAC exhibits a long-term lifespan for 1100 h under a current density of 5 mA cm -2 with fixed areal capacity of 5 mAh cm -2 . Remarkably, full cells paired with practical-level LiFePO 4 cathode of 2.45 mAh cm -2 deliver superior performance.
研究领域:
材料科学
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储能
·
电化学
·
电池技术
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Chenchen Zhao,Mengjie Wu,Meiju Li,Tianqi Wang,Ping Zhang,Yujie Li
Excessive phosphate discharge into aquatic systems drives eutrophication while depleting finite phosphorus resources. To address this dual challenge, a magnetic calcium/ferric hydroxide composite was developed via co-precipitation for efficient phosphate recovery. The optimized magnetic calcium/ferric hydroxide composite (Ca:Fe = 3:1) integrates CaFe-layered double hydroxide and Ca(OH) 2 , achieving a phosphate uptake capacity of 224.2 mg/g. Pseudo-second-order kinetics confirmed the chemisorption mechanism, and the Freundlich isotherm revealed a multilayer adsorption behavior. Thermodynamic analysis confirmed the exothermic nature of the process. The composite performed robustly across pH 2 - 12, in the presence of competing anions, and in real water matrices. Mechanism studies identified pH-dependent pathways: electrostatic attraction and ligand exchange on amorphous akageneite under pH<6; hydroxyapatite precipitation and ligand exchange with ferrihydrite at pH≥6. LDH facilitated uptake via ion exchange and self-assembly under high phosphate concentrations (≥600 mg/L) and strongly alkaline conditions (pH≥12). The material maintained its magnetic properties, enabling easy separation and reuse over five cycles with >90% performance retention. This work presents a high-capacity, recyclable adsorbent that supports both eutrophication control and resource recovery, while offering mechanistic insights for designing multifunctional metal-based adsorbents.
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Optoelectronics Letters
·
2014
·Vol. 10
·期 5
·343-346
·
IF 0
Song Jun,Sun Liang,Li Jian,Ma Jian,Wang Da-jian
A solid-solution-phase Ba 1.75 Ca 1.25 MgSi 2 O 8 : Eu 2+ , Mn 2+ phosphor in the photosynthetic action spectrum with dual band emissions at 438 nm and 660 nm is fabricated. X-ray diffraction (XRD) confirms the presence of the solid-solution phase. With the supporting information from the diffuse reflection spectrum, a feasible way to obtain higher energy-transfer (ET) efficiency is attained, and the ET efficiency of Eu 2+ -Mn 2+ is enhanced to 76%. The mechanism of this enhancement is owing to variation of the solid solution composition of Ca 3 MgSi 2 O 8 and Ba 3 MgSi 2 O 8 , which contributes to the extension of the critical distance. Temperature-dependent results show an enhancement which is attributed to Ca. These enhancements show great promise for improving eco-lighting devices.
研究领域:
材料科学
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光电子学
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无机化学
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功能材料
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农业光生物学
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DOI
Materials Advances
·
2022
·Vol. 3
·期 15
·6171-6178
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IF 0
Mingsheng Cai,Tianchun Lang,Tao Han,Damir Valiev,Shuangqiang Fang,Houjiang You,Bitao Liu,Ling Du,Zichao Xu,Elena F. Polisadova
Investigating narrow-band green emitting phosphors with high efficiency and good thermal stability is the main goal of the present light-emitting diode (LED) display research. Here, Ba1−xCaxScO2F:0.001Bi3+,0.001K+ (x = 0–0.12) perovskite phosphors, emitting narrow green light excited by a 415 nm chip, were developed using the cation substitution design strategy. The effects of Ca2+ substitution for Ba2+ in the Ba1−xCaxScO2F:0.001Bi3+,0.001K+ crystal structures and photoluminescence properties were investigated. All the phosphors show the cubic perovskite-type structure in the space group Pm3m. The evolution of the cell parameters and the Ba/Ca/K/Bi–O bond lengths were evaluated. The phosphors with the internal quantum efficiency of 77.4% exhibit bright green emission peaking at 510 nm under 415 nm chip excitation. The improvement of luminescence efficiency and thermal stability was discussed in detail in relation to the local structure variation. The cation substitution design strategy mentioned here can become an important approach to realize the spectral modulation through controlling the micro-environment in the lattice for excellent LED backlight displays.
研究领域:
材料科学
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光学工程
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无机化学
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固体物理
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显示技术
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DOI
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 20
·7839-7845
·
IF 3.069
Kun Chai,Shichao Cheng,Hongyi Li,Bin Dai
A new phosphate fluoride, Rb2CaPO4F, was synthesized from a high temperature solution. Single-crystal X-ray diffraction analysis indicates that Rb2CaPO4F belongs to the Pnma space group of the orthorhombic system. It exhibits an intricate three dimensional (3D) framework that consists of 1D infinite zig-zag [FRb2Ca]∞ chains interlinked by isolated PO4 tetrahedra. The 1D chains are composed of plane-sharing F-centered [FRb4Ca2] octahedra. Meanwhile, we also obtained another phosphate fluoride K2CaPO4F, which is isostructural with Rb2CaPO4F. Moreover, the effect of the cation size on the framework structures of A2CaPO4F (A = K, Rb) and K2BaPO4F is discussed in detail. In addition, the UV-Vis-NIR diffuse reflectance spectra and the infrared spectra were measured to determine their cut-off edge and the anionic group, respectively. The first-principles theoretical studies were also conducted to aid in the understanding of the electronic structures and linear optical properties.
研究领域:
材料科学
·
化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Peijun Yang,Zhidan Diao,Hui Jin,Shaohua Shen
Sodium-ion batteries (SIBs) have attracted much attention for their high energy densities and low cost. However, the unstable solid-liquid interphase seriously restricts the development and application of SIBs. Herein, Ca(ClO 4 ) 2 as a new-type electrolyte additive is developed to engineer the solid-liquid interphase of carbon-coated anodes. In the electrolyte with an appropriate concentration of Ca(ClO 4 ) 2 , Ca 2+ can insert into the carbon coating and form a passivation layer during the first cycle, reducing the irreversible sodium-ion capture in the carbon coating and the electrolyte decomposition at the solid-liquid interface. Thus, the carbon-coated anode with a thin and stable solid electrolyte interphase (SEI) layer formed realizes the superior sodium storage performance with enhanced sodium-ion diffusion kinetics. Specifically, after adding 0.015 M Ca(ClO 4 ) 2 into the electrolyte, the reversible capacity of carbon-coated TiO 2 anode could be greatly improved from 271.2 mAh g −1 to 335.1 mAh g −1 at 50 mA g −1 , with the initial coulombic efficiency increasing from 41.2 % to 48.7 %. This study provides an alternative strategy to optimizing the SEI layer of carbon-coated TiO 2 anode for superior sodium storage property, which also can be applied to other carbon-coated anodes for SIBs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Kun Hu,Qingjie Xie,Huijuan Wang,Bo Zhang,Yuyue Huang,Shilin Song,Huihui Zhang,Yixiao Ding,Hai Huang,Chundu Wu
In this paper, degradation of ciprofloxacin (CIP) in a circulating dielectric barrier discharge (DBD) plasma system with Cu-CeO 2 @CA composite films addition was investigated. The Cu-CeO 2 @CA films were synthesized through hydrothermal method, and the samples were characterized by SEM , XRD, EDS, FT-IR and Raman spectra analysis. The obtained results show that there was synergistic effect of the DBD plasma and the Cu-CeO 2 @CA films on the CIP degradation and mineralization. The optimal performance was obtained under the condition of 5 wt% Cu-CeO 2 nanoparticles doping in the composite film. Besides the effect of the DBD plasma, the Cu-CeO 2 @CA films could drive the O 3 decomposition, photocatalysis and then the more reactive oxygen species (ROS) formation. The presence of the main active species and their contributions to the CIP degradation were determined by electron spin resonance (ESR) analysis and radical quenching experiments. Methods of UV–vis spectrum, three-dimensional fluorescence spectrum and liquid chromatography mass spectrometry (LC-MS) were used to analyze the CIP decomposition process. The prepared Cu-CeO 2 @CA composite films had certain stability in the four cycles of application and the film catalyst was convenient for recycling. The toxicity evaluation results indicated the decline of the solution toxicity after treating in the Cu-CeO 2 @CA/DBD system.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 24
·1-17
·
IF 2.8
Fan Yan,Wang Lei,Sun Xueqin,Li Cuili,Liu Jiacheng
A series of UiO-66-NH 2 -CA-Cu/g-C 3 N 4 (UCC 1 /CN x ) heterogeneous photocatalysts were constructed via a facile physical mixing treatment of the covalently post-modified MOF (UiO-66-NH 2 -CA-Cu) and functional materials g-C 3 N 4 . The tetracycline removal by the photocatalysis coupled with persulfate activation were studied under white light irradiation. The optimal UCC 1 /CN 20 photocatalyst showed the best photocatalytic performance, in which 94.0% TC could be efficiently eliminated ( k = 0.08669 min −1 ) within 30 min. The satisfactory degradation performance could be ascribed to the effective separation of photogenerated electron-hole pairs over the heterogeneous binary structure, which were demonstrated by several characteristic technologies including photoluminescence spectra, electrochemical impedance spectroscopy, transient photocurrent response and Bader charge analysis based on density functional theory calculations. Moreover, a possible mechanism behind the photocatalytic degradation was proposed and further affirmed by the quenching experiments and electron spin resonance measurements. Our work may supply a feasible idea for treating wastewater contained organic pollutants based on the heterogeneous photocatalyst.
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DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Yuxiang Cheng,Zhongjie Shen,Feng Lv,Dayang Wan,Yongchuan Gao,Yiru Yang,Haifeng Lu,Zhenghua Dai,Haifeng Liu
During the Ca(OH) 2 /CaO thermochemical energy storage process, the cyclability of reactions and the consolidation properties of powder storage are important issues to consider. In this study, experiments were conducted to assess the evolution of reaction conversion, particle size and penetration resistance of Ca(OH) 2 /CaO powder fixed bed. The results revealed that the final conversions of both the hydration and dehydration reactions stabilized between 70 and 80%. The particle size distributions of Ca(OH) 2 increased initially and then decreased with the increasing cycle number and degree of dehydration. The dehydration conversion was the dominant factor for changing Ca(OH) 2 bed penetration resistance force. The particle size and penetration resistance of the CaO bed remained stable during long-term storage at high temperatures. The theoretical analysis of the inter-particle forces agreed with the trend of the experimental results, with particle size and moisture content being the main factors affecting cohesion.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 37
·e54417
·
IF 3
Mingjie Lin,Junmei Ma,Xuping Xue,Shiyang Li,Qingyi Wang,Zixuan Lv,Congjie Gao,Linxin Xue
Polyamide (PA) based thin film composite forward osmotic (TFC-FO) membranes were prepared through inter-facial polymerization (IP) processes on porous cellulose acetate (CA) substrates. A dual solvent modification process of adding DMF in the aqueous phase followed by activation with methanol was found to be able to simultaneously improve the permselectivity and anti-fouling capability of the modified membranes. On top of the acidic CA substrates, DMF could not only absorb the HCl formed in the IP processes, but also chemically bind with the PA matrix by reaction with MPD monomers, leading to formation of homogeneous thin and flat PA layers, while methanol activation further swelled the PA matrix, repaired defects and optimized water permeating channels. Using 1 M NaCl solution as the draw solution, the water flux of the CA/PA-DMF4-ME1 membrane was twice that of the pristine membrane, and 24% increase in J w /J s value from 182 to 225 L·mol −1 . Its J w /J s value could be further increased 10 times to 2000 L·mol −1 using 1 M Na 2 SO 4 solution as draw solution. RO tests for the CA/PA-DMF4-ME1 membranes showed 6-fold increase in water permeance, from 1.16 to 7.02 L·m −2 ·h −1 ·bar −1 , as well as increase in NaCl rejection from 94.8% to 97.7% from pristine membrane.
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高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Yuhong Zhang,Yibin Guo,Xingke Zheng,Pengcheng Wang,Hang Liu
A series of AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors are successfully prepared by solid-state method. In comparison with the samples without Gd 3+ ions, the UC emission intensity of CaWO 4 : 0.5 mol%Tm 3+ /1 mol%Yb 3+ /10 mol%Gd 3+ sample has increased by 104 times (∼475 nm), 71 times (∼655 nm) and 23 times (∼795 nm) due to the shrink of the host lattice with the Gd 3+ ions corporation. Based on the fluorescence intensity ratio (FIR) of non-thermal couple levels(non-TCLs), the temperature sensing characteristics are investigated for AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors. The maximum values of absolute sensitivity and relative sensitivity are 0.09356 K -1 and 1.499% K −1 for CaWO 4 : Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphor. It indicates that the AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors can be applied to develop optical thermometry.
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高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Zijing Wang,Changjuan Mo,Sixuan Xu,Shanshuai Chen,Tiansheng Deng,Wanbin Zhu,Hongliang Wang
The catalytic conversion of carbohydrate to platform chemicals, e.g. lactic acid (LA), is the key to unlock the potential of biomass. In this study, we report that the combination of Ba(OH) 2 and Ca(OH) 2 can efficiently catalyse high-concentration (> 0.5 M) of glucose to relatively high yield of LA (> 40 %) under mild conditions (60 °C). Both glucose conversion and LA yield were sensitive to the pH of the catalytic system. A high loading of Ba(OH) 2 led to a high initial pH of the reaction solution, resulting in serious side reactions. While, a low loading of Ba(OH) 2 led to a quike decrease of OH − and Ba 2+ both of which were continuously consumpted by the formed LA. The combination of Ca(OH) 2 with Ba(OH) 2 could significantly improve LA yield, since Ca(OH) 2 , with limited solubility, could act as a controlled-release catalyst for the real-time supply of OH − and Ca 2+ . OH − was indispensable for glucose isomerization to fructose as well as for fructose retro-aldol reaction to C 3 intermediates. Ca 2+ could combine with LA to form stable calcium lactate, liberating Ba 2+ to catalyse the conversion of C 3 intermediates to LA. Under the preliminary optimized reaction conditions, the yield of LA could be reached to 42.55 % and 38.32 % from 0.5 M and 1 M glucose, respectively. This catalytic system has advantages of mild reaction condition, short reaction time, and capable of conversion of high-concentration substrates, enabling it with a great potential for practical applications.
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高影响因子
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