JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Jun Gu,Guolang Zhou,Linlin Chen,Xiaowei Li,Guiling Luo,Linjing Fan,Yanhong Chao,Haiyan Ji,Wenshuai Zhu
With the unprecedented heat of lithium resources, it has been a hot topic to find an effective, low-energy-consumption, and eco-friendly method for extracting lithium from salt lakes. As an electrochemically active material, LiMn 2 O 4 (LMO) is widely used in electrochemical lithium extraction. In order to reduce the Mn dissolution loss and improve the cycle stability of LMO, we designed octahedral LMO with controllable particle size by adjusting the water/ethanol volume ratio of the precursor solution. Through the electrochemical performance test, it was found that with the increase in particle size, the cycle stability of LMO and the lithium ion transport performance also improved. The Mn dissolution loss per 30 cycles of LMO (B-LMO) was 0.187%, and the capacity was maintained at the initial 86.9%. The electrochemical lithium extraction system of B-LMO//Ag exhibits excellent lithium extraction performance. After 1 h of extraction, the lithium extraction capacity is 20.6 mg/g, and the energy consumption is 15.2 Wh/mol.
研究领域:
材料科学
·
电化学工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Saiyu Yang,Zicheng Yin,Xianchun Chen,Zhide Geng,Bo Wang,Junwen Zhou,Lu Wang
Conventional methods for synthesizing nano-sized metal-organic frameworks (nano-MOFs) often rely on additives or extra conditions, overlooking the critical role of solvents. Here, we highlight tetramethylene sulfone (TMS, or sulfolane) as a versatile solvent for nano-MOF synthesis. TMS forms strong solvation structures with metal ions and inhibits ligand deprotonation, enabling control over particle size. Using TMS, we synthesized ZIF-65 [Zn(2-nIm)2, 2-nIm = 2-nitroimidazole], ZIF-8 [Zn(2-mIm)2, 2-mIm = 2-methylimidazole], UiO-66 [Zr6O4(OH)4(BDC)6, BDC = 1,4-dicarboxybenzene acid], and MOF-199 [Cu3(BTC)2, BTC = 1,3,5-benzenetricarboxylic acid] with significantly smaller particle sizes compared to traditional solvents like ethanol (EtOH). Systematic analysis on the growth of ZIF-65 revealed distinct growth behaviors: in TMS, slower kinetics allowed the coexistence of nucleation and growth over an extended period, leading to an increase in particle number while maintaining relatively constant size; in contrast, EtOH promoted rapid growth followed by Ostwald ripening, resulting in larger particles and reduced particle number over time. By adjusting reactant concentration, metal-to-ligand ratio, and reaction temperature, we achieved facile size modulation of ZIF-65 nanoparticles. This work underscores the importance of solvents in nano-MOF synthesis and offers a robust strategy for tailoring MOF particle size, advancing applications in catalysis, biomedicine, and beyond.
研究领域:
材料科学
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化学工程
·
纳米技术
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 1
·192-202
·
IF 3.925
Huanhuan Wang,Qi Qu,Zhiming Liu,Yan He,Jiangshan Gao
Herein, we report a micro-mix strategy for the continuous and large-scale synthesis of Ni–Co PBA nanoparticles. The technique presented in this study allows the particle size to be controlled in the 165 nm to 350 nm range while maintaining a high specific surface area (250 m2 g−1) and cubic structure. Furthermore, the particles exhibit superior dispersity and have a more homogeneous particle size than those prepared using the conventional stirring-mix method due to the drastic collisions that occur in the microchannel during the precipitation process. The present study demonstrates that the concentration of raw materials and feed flow rates in the microreactor effectively control the particle size during mixing. The high concentration of raw materials could decrease the particle size, and the particle size is decreased with the increasing feed flow rates when Re (Reynolds number) <783. Particularly, when 783 < Re < 1567, the particle size remains stable (about 165 ± 10 nm). Additionally, the space-time yield (STY) of Ni–Co PBA is 471 kg m−3 d−1. Finally, the continuous flow microreactor can continuously fabricate large-scale and high-quality Ni–Co PBA crystals with distinct morphological features in a short period of time, providing an effective alternative to the time-consuming and multi-step MOF synthesis method.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 28
·13661-13672
·
IF 7.233
Wei Jiang,Hongyan Fu,Yingming Zhu,Hairong Yue,Shaojun Yuan,Bin Liang
In this research, a controlling mechanism of particle size on the wettability of Ag2O particles is reported, and an interesting floatable Ag2O photocatalyst with superhydrophobicity and superoleophilicity is prepared based on this mechanism. Stable superhydrophobic and superhydrophilic Ag2O without a low-surface-energy modifier can be obtained only by adjusting its particle size, and its wettability can switch mutually by changing the particle size. The wettability of Ag2O converts from superhydrophilic to hydrophobic when the average particle size is more than 1.08 μm. The operation parameters of the Ag2O crystallization process significantly influence the wettability of the Ag2O particles. The obtained superhydrophobic Ag2O floated on the water surface, and exhibited excellent photodegradation performance with various floating oils. This attractive superhydrophobic Ag2O photocatalyst is promising for practical applications, and provides a strategy for the development of functional photocatalysts and superhydrophobic materials.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Shuyang Shi,Baozhong Ma,Hui Yang,Zhihe Cao,Yubo Liu,Yongqiang Chen,Chengyan Wang
In bauxite-scarce China, aluminum extraction from alternative resources via the acid leaching process is promising. However, critical gaps persist: (1) pyrolysis yields lightweight alumina with limited market capacity, and (2) direct electrolytic alumina synthesis from acid leach liquor remains unexplored, especially alumina particle size control. The production of coarse boehmite as an alumina precursor via high-temperature autohydrolysis was investigated in this paper. First, the hydrolysis characteristics of Al 3+ were revealed by thermodynamic analysis. Subsequently, the experimental parameters and hydrolysate particle size were optimized through a series of experiments. Under optimal conditions, an Al hydrolysis ratio of 82.6 % and a median particle size of 27.1 μm for polycrystalline boehmite were achieved. The morphological evolution of boehmite was revealed by SEM. The hydrolysis path was determined by analyzing the variation of Al-ion species with pH. Kinetics demonstrated that the hydrolysis process followed heterogeneous nucleation and was chemically controlled, with an apparent activation energy of 52.2 kJ/mol. Finally, a novel process for electrolytic Al 2 O 3 preparation and simultaneous HNO 3 regeneration using coal gangue and fly ash as raw materials was proposed. This study establishes a technological foundation for producing electrolytic alumina from aluminum-containing solid wastes, providing a novel route for large-scale aluminum resource recovery.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
Particuology
·
2023
·
IF 3.5
Zhuoran Deng,Liqiang Zhao,Daojian Cheng
Pt catalysts are commonly used for chemical reaction processes due to its high catalytic activity and selectivity. Notably, the size of metal particles often has a significant impact on the performance of the metal-loaded catalysts. Therefore, developing highly efficiently synthesis method for the size control of Pt catalysts has great development prospects and research value. In this study, high-throughput size tuning of Pt-based catalysts was achieved by carbonizing the carriers. The experimental and characterization results showed that the size of the loaded Pt nanoparticles varied with different concentrations of glucose solution during carriers carbonization process. The reduction of 4-nitrophenol as a template reaction indicated that the reaction rate constant of the catalyst is approximately linear with the size of Pt particles. Importantly, a laboratory-built high-throughput synthesis system was applied for the catalyst synthesis, which enhances the automation of the laboratory exploratory experiments and makes it possible to synthesize catalysts with controllable size in batches.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mei Yang,Jiao Ma,Ling Xia,Yujiao Guo,Xiaofang Liu,Wei Bai,Mingwu Xiang,Junming Guo
The spinel LiMn 2 O 4 cathode material shows severe capacity degradation due to Jahn–Teller distortion and dissolution of Mn during the charge-discharge process. Herein, a series of single crystal truncated octahedral of LiFe 0.03 B x Mn 1.97−x O 4 (0≤x≤0.10) were synthesized by simple solid-state combustion combined with Fe-B co-doping, morphology and particle size controlling strategy. Through Fe-B co-doping, not only the LiFe 0.03 Mn 1.97 O 4 containing {111}, {100} and {110} planes are successfully controlled to the particles containing only {111} and {100} planes, but also the near-nanometer particles are controlled to bigger submicron sizes. It is found that Fe-B co-doping can enhance the stability of the crystal structure, inhibit Jahn-Teller distortion and reduce the dissolution of Mn. Among them, the optimized LiFe 0.03 B 0.08 Mn 1.89 O 4 forms a truncated octahedral single crystal particle with good crystallization and only {111} and {100} crystal faces, and the particle size is around 349.3 nm, showing exceptional high rate capacity and long cycle life. The LiFe 0.03 B 0.08 Mn 1.89 O 4 releases a high initial discharge capacity of 107.1 mAh/g with a capacity retention of 77.7% after 1000 cycles at 10 C, which is higher than that of the LiFe 0.03 Mn 1.97 O 4 (58.8%). Even at 20 C, LiFe 0.03 B 0.08 Mn 1.89 O 4 still achieves a high reversible specific capacity (90.4 mAh/g) and outstanding long-cycle stability (81.3%, 1000th). This work provides a scientific basis for the crystal surface control and particle size control of spinel LiMn 2 O 4 , which is of great significance for the development of the next generation of high-power lithium-ion batteries.
研究领域:
材料科学
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电化学
·
能源存储技术
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产品关联
DOI
高影响因子
Micromachines
·
2025
·Vol. 16
·期 9
·1058
·
IF 3
Qian Peng,Guangzu Wang,Chao Sheng,Haonan Wang,Yao Fu,Shenghong Huang
This study introduces the Double-Diamond Reactor (DDR), a novel planar passive microreactor designed to overcome the following conventional limitations: inefficient mass transfer, high flow resistance, and clogging. The DDR integrates splitting–turning–impinging (STI) hydrodynamic principles via CFD-guided optimization, generating chaotic advection to enhance mixing. Experimental evaluations using Villermaux–Dushman tests showed a segregation index (Xs) as low as 0.027 at 100 mL·min−1, indicating near-perfect mixing. In BaSO4nanoparticle synthesis, the DDR achieved a 46% smaller average particle size (95 nm) and narrower distribution (σg=1.27) compared to reference designs (AFR-1), while maintaining low pressure drops (<20 kPa at 60 mL·min−1). The DDR’s superior performance stems from its hierarchical flow division and concave-induced vortices, which eliminate stagnant zones. This work demonstrates the DDR’s potential for high-throughput nanomaterial synthesis with precise control over particle characteristics, offering a scalable and energy-efficient solution for advanced chemical processes.
研究领域:
化学工程
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微流控技术
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纳米科技
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反应工程
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过程强化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 3
·030501
·
IF 4.316
Liuyang Zhao,Huimin Xu,Hao Ru,Yueli Shi,Quanchao Zhuang,Yongli Cui,Zhicheng Ju,Yanhua Cui
Conversion-type lithium–metal fluoride batteries with high energy density, are considered to be very promising candidates for the next generation of low-cost lithium-ion batteries. Unfortunately, metal fluoride cathodes generally suffer from poor conductivity, sluggish reaction kinetics, and irreversible structural changes. Reducing particle size to nanoscale is an effective way to solve the large volume change and poor electronic conductivity of metal fluoride cathodes. In this study, a nano-control strategy was proposed, using n-propanol as an auxiliary solvent to achieve the conversion of micrometer-scale FeF3·3H2O to nanoscale FeF3·0.33H2O. Meanwhile, the particle size and morphology of iron fluorides could be controlled by regulating the synthesis temperature. The distribution of relaxation times (DRT) was used to analyze the electrochemical impedance spectroscopy (EIS). FeF3·0.33H2O synthesized at 180 °C with lower resistance showed a high capacity of 200 mAh g−1 after 160 cycles with excellent rate performance and cycle stability.
研究领域:
材料科学
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电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF CULTURAL HERITAGE
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2025
·
IF 3.3
Ming Wu,Zhenzhen Ma,Zhang He,Jinghan Ding,Xichen Zhao,Encarnacion Ruiz-Agudo,Carlos Rodriguez-Navarro,Jinmeng Zhu,Xuanhua Li
Mural paintings reflect valuable spiritual and cultural achievements of human civilizations and serve as crucial evidence for studying ancient customs, rituals, and clothing. However, deterioration of the mural plaster layer results in a decrease in the mural’s mechanical strength, thus posing a serious threat to its preservation. Nanolime (NL) is currently one of the most widely studied inorganic nanomaterials for the consolidation of cultural heritage in general, and mural paintings in particular, due to its excellent compatibility. However, there is limited research on the application of NL for consolidating the plaster layer of mural paintings. Here, we focus on ancient tomb mural paintings (ca. 1000 CE), investigating the consolidation performance of NL for its plaster layer. NL is homogeneously synthesized in the presence of additives and subjected to size-selection through centrifugation, yielding a narrowly distributed particle size of ∼40 nm—markedly smaller than the ∼180 nm obtained without centrifugation (NL-C). This novel NL is subsequently applied to the plaster layer of the tomb mural exhibiting limited impact on its pore structure and good penetration depth (1.2∼3.5 mm), which is significantly deeper than that observed in samples consolidated with NL-C (∼1 mm). More importantly, after consolidation with NL, the surface hardness of the plaster layer increases by ∼56 %, and the surface weight loss decreases by ∼67 %, demonstrating an effective consolidation performance. This study provides technical and methodological support for the application of NL in the preservation of ancient tomb murals.
研究领域:
文化遗产保护
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材料科学
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考古学
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古代建筑技术
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无机纳米材料应用
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Jia Jixiang,Wang Haiwei,Yang Guang,Lu Zhihao,Wang Rui,Wu Zhaoyang
Preparing insulating layers via interfacial solid-phase reactions is regarded as one of the most effective strategies for enhancing the magnetic performance of soft magnetic powder cores (SMPCs). However, mismatches in lattice structures between the insulating layer and the magnetic powder can cause cracking in the insulating layer, thereby compromising the stability and performance of SMPCs under operational conditions. This study presents a refined method for preparing insulating layers based on solid-phase reactions, utilizing the thermal decomposition of salt compounds in combination with powders of differing particle sizes: 99.4 μ m (S1) and 8.9 μ m (S2). Initially, the FeSiCr(S1+S2)/ZnSO 4 composite powder was synthesized through a hydrothermal method. Subsequently, FeSiCr(S1+S2)-based SMPCs with a SiO 2 @Cr 2 O 3 @ZnO (SCZ) composite insulating layer were successfully prepared by a combination of heat treatment and cold pressing. Then, we investigated the effect of varying powder ratios of different particle sizes on the microstructure and magnetic performances of FeSiCr(S1+S2)/SCZ SMPCs, and the results revealed that ZnSO 4 decomposes into solid-phase ZnO and gaseous SO 2 and O 2 during heat treatment. Among these, O 2 triggers the solid-phase reaction, causing non-magnetic Si and Cr atoms from the soft magnetic powder to migrate to the surface, leading to the formation of a composite insulating layer. The smaller FeSiCr(S2) powder fills gaps within the SMPCs and provides more sites for ZnSO 4 decomposition and insulating layer formation. This process allows for the uniform growth of an insulating layer on the surface of the magnetic powder, thereby reducing the lattice mismatch while simultaneously increasing the magnetic phase content. The optimal magnetic performance was achieved at a powder ratio of 60:40 wt% (S1:S2), with maximum saturation magnetization (172.9 emu/g), magnetic permeability (31.3 at 10 mT, 500 kHz) and low core loss (465.62 kW/m 3 at 30 mT, 200 kHz). These findings suggest that the optimized SMPCs are promising candidates for high-performance electromagnetic components. Graphical
研究领域:
材料科学
·
电磁材料
·
固态化学
·
粉末冶金
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）