Soft Matter
·
2022
·Vol. 18
·期 43
·8251-8261
·
IF 4.046
Hengxin Fang,Zhanli Geng,Nan Guan,Limin Zhou,Lijuan Zhang,Jun Hu
Spherical nanobubbles and flat micropancakes are two typical states of gas aggregation on solid–liquid surfaces. Micropancakes, which are quasi-two-dimensional gaseous structures, are often produced accompanied by surface nanobubbles. Compared with surface nanobubbles, the intrinsic properties of micropancakes are barely understood due to the challenge of the highly efficient preparation and characterization of such structures. The hydrophobicity of the substrate and gas saturation of solvents are two crucial factors for the nucleation and stability of interfacial gas domains. Herein, we investigated the synergistic effect of the surface hydrophobicity and gas saturation on the generation of interfacial gas structures. Different surface hydrophobicities were achieved by the aging process of highly oriented pyrolytic graphite (HOPG). The results indicated that higher surface hydrophobicity and gas oversaturation could create surface nanobubbles and micropancakes with higher efficiency. Strong surface hydrophobicity could promote nanobubble nucleation and higher gas saturation would induce bigger nanobubbles. Degassed experiments could remove most of these structures and prove that they are actually gaseous domains. Finally, we draw a region diagram to describe the formation conditions of nanobubbles, micropancakes based on observations. These results would be very helpful for further understanding the formation of interfacial gas structures on the hydrophobic surface under different gas saturation.
研究领域:
材料科学
·
界面化学
✓ 已验证
DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2024
·Vol. 59
·期 2
·2300264
·
IF 1.5
Hongyan Cui,Liangcheng Song,Sheng Lv,Chongqiang Zhu,Chunhui Yang
Seeding metastable zone of itaconic acid in water is determined using a laser dynamic detecting technique, based on which feedback supersaturation control is performed for the crystallization process. The crystallization is strictly confined within the metastable zone throughout the whole process to effectively inhibit the secondary nucleation and the strategy of seed loading is employed to avoid the burst of primary nucleation, resulting in the uniform particle size distribution. With the aid of solution information, continuous feedback control is conducted to keep the supersaturation at a high level accelerating the crystal growth, which significantly shortens the time consumption, and also the effect of seed amount is discussed in this work.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2016
·
IF 3.698
Hongliang Dai,Xiwu Lu,Yonghong Peng,Haiming Zou,Jing Shi
Homogeneous nucleation of hydroxyapatite (HAP) crystallization in high levels of supersaturation solution has a negative effect on phosphorus recovery efficiency because of the poor settleability of the generated HAP microcrystalline. In this study, a new high-performance approach for phosphorus recovery from anaerobic supernatant using three series-coupled air-agitated crystallization reactors was developed and characterized. During 30-day operation, the proposed process showed a high recovery efficiency (∼95.82%) and low microcrystalline ratio (∼3.11%). Particle size analysis showed that the microcrystalline size was successively increased (from 5.81 to 26.32 μm) with the sequence of series-coupled reactors, confirming the conjectural mechanism that a multistage-induced crystallization system provided an appropriate condition for the growth, aggregation, and precipitation of crystallized products. Furthermore, the new process showed a broad spectrum of handling ability for different concentrations of phosphorus-containing solution in the range of 5–350 mg L −1 , and the obtained results of phosphorus conversion ratio and recovery efficiency were more than 92% and 80%, respectively. Overall, these results showed that the new process exhibited an excellent ability of efficient phosphorus recovery as well as wide application scope, and might be used as an effective approach for phosphorus removal and recovery from wastewater.
研究领域:
环境科学
·
废水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Energy
·
2023
·Vol. 6
·期 4
·e383
·
IF 20.5
Youchun Yu,Simeng Wang,Juyan Zhang,Weiwei Qian,Nana Zhang,Guangjie Shao,Haiyan Bian,Yuwen Liu,Lan Zhang
The specific energy of Li metal batteries (LMBs) can be improved by using high-voltage cathode materials; however, achieving long-term stable cycling performance in the corresponding system is particularly challenging for the liquid electrolyte. Herein, a novel pseudo-oversaturated electrolyte (POSE) is prepared by introducing 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) to adjust the coordination structure between diglyme (G2) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Surprisingly, although TTE shows little solubility to LiTFSI, the molar ratio between LiTFSI and G2 in the POSE can be increased to 1:1, which is much higher than that of the saturation state, 1:2.8. Simulation and experimental results prove that TTE promotes closer contact of the G2 molecular with Li + in the POSE. Moreover, it also participates in the formation of electrolyte/electrode interphases. The electrolyte shows outstanding compatibility with both the Li metal anode and typical high-voltage cathodes. Li||Li symmetric cells show a long life of more than 2000 h at 1 mA cm −2 , 1 mAh cm −2 . In the meantime, Li||LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cell with the POSE shows a high reversible capacity of 134.8 mAh g −1 after 900 cycles at 4.5 V, 1 C rate. The concept of POSE can provide new insight into the Li + solvation structure and in the design of advanced electrolytes for LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 9
·1303-1311
·
IF 2.6
Shuyue Miao,Fangbao Jiao,Ying Wang,Qi Zhang,Suming Jing,Hongzhen Li,Xin Zhou
Compared with jagged and rod-like raw products, the spherulitic 3-nitro-1,2,4-triazol-5-one (NTO) crystalline powder is generally superior in the formulation. However, the growth mechanism and corresponding influential factors for NTO spherulites remain to be deeply explored. Herein, the morphological evolutions of NTO crystals in alcohol solvents under a range of maximum supersaturation (Smax) are systematically investigated. It was found that differences in solvent-crystal interface interactions determine the primary morphology of the growing crystals while the magnitude of Smax determines the subsequent polycrystalline evolution. The cooling rate, initial concentration and stirring rate all could affect the crystal morphology by changing the Smax. It is demonstrated that there exists a critical Smax range (1.75–1.88) above which the formation of spherulites is kinetically favorable. Face indexing tests suggest that the (0 0 1) plane of NTO is mostly prone to twinning at low supersaturation, which is because that the molecular layers on the (0 0 1) surface are prone to twisting and the energy difference before and after is only 8.77 kJ mol−1. Then, the interfacial growth theory is employed to explain how a growing crystal plane develops from smooth to rough with non-crystallographic sub-individuals as the crystallization driving force increases. The change of morphology has a positive consequence in improving the safety performance of NTO crystalline powder under drop-weight impact. These findings would forward the understanding of the spherulitic crystallization process for energetic crystals.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2022
·
IF 5.64
Jie Yin,Jun Zhang,Li Lv,Hui Zhong
Enhancing the growth performance of fine particles in supersaturated water vapor environment (SWVE) is an important means to further improve the removal efficiency of fine particles in coal-fired flue gas . In this paper, the growth performance of fine particles was strengthened by direct coupling magnetic field (MF) and heterogeneous condensation technology. The particle growth and measurement experimental platform was used to measure the effect of MF on the growth performance of heterogeneous condensation for high-concentration particles under different particle concentration and residence time. Our results show that the growth performance of insoluble submicron particles can be improved by direct coupling MF and heterogeneous condensation technology. After adding the MF with an intensity of 61.1 mT, the number of submicron particles decreases, and the number of particles with particle size greater than 2.1 μm increases in grown particles. At the same particle concentration and supersaturation , the arithmetic mean diameter of the grown particles in the SWVE with MF increases by 0.45%–2.32%, compared with that without magnetic field. Under the same residence time and supersaturation, the arithmetic mean diameter increases by 0.32%–6.89% for the grown particles in the SWVE with MF.
研究领域:
环境科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 50
·2305134
·
IF 13.3
Yifan Liu,Jiazuo Zhou,Yudong Li,Ziyao Wang,Xiaohan Sun,Haiyue Yang,Chengyu Wang
Phase change materials (PCMs) have great prospects in thermal management applications because they can store and release latent heat. However, they are not suitable for on-demand heating as they can only release heat once. Herein, this work reports the intermittent exothermic of PCMs based on a supersaturated salt solution, exhibiting fully controlled long-term storage of energy, releasing and suspending heat on demand. Due to the high energy barrier, it is difficult for the supersaturated salt solution to nucleate; thus, it can store energy for a long time. Contact with seeds or other foreign objects can destroy the metastable state of the supersaturated salt solution and promote the formation of crystal nuclei, enabling crystallization and heat release on demand. The release of crystallization heat can be interrupted using scissors dip in water. Additionally, self-healing behavior allows it to be recycled and last longer, due to the presence of Fe 3+ , inducing strong dynamic reversible non-covalent crosslinking through metal coordination bonds. Furthermore, the hydrated salts gels are applied for thermal management of underfloor radiant heating system, demonstrating four types of intermittent exotherms sequences amazingly. Further, the intermittent exothermic hydrated salts gels provide a more user-friendly thermal management of underfloor radiant heating systems.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 4
·285
·
IF 5.3
Lin Zhang,Xiaoling Lu,Hao Li,Hongjie Chen,Qi Yin,Xuehan Hu,Kang Yang,Fang Yang,Liya Chen,Zeng Yang,You Long,Chao Shen,Bo Yao,Chenghong Huang
The medicinal value of vanillin and its isomers has not been well developed, so it is necessary to prepare crystals of vanillin and its isomers as well as to investigate their crystallization rules in detail using advanced crystallization techniques in polymer gel. Based on molecular simulation, the maximum number of hydrogen bonds between CMCS with Van, IsoVan and oVan were reached at molar ratios of 1:9 and 1:4 and 1:5, respectively. The gel hardness and apparent viscosity of CMCS/Van isomers were proportional to the mole ratio, while elongation at break and tensile strength decreased with an increase in molar concentration depending on the position of the side chain group of the Van isomer, exposure of the benzene ring, steric resistance and the number of hydrogen bonds formed. The crystallization of Van, IsoVan and oVan in CMCS gel unexceptionally follow classical supersaturation theory in the case that nVan mainly exhibits a unique growth pattern from needle to strip, IsoVan’s growth style changes from plate to bulk and oVan adapts growth pattern from needle to branch bifurcating. It was also found that the Van crystal changed from II-type to I-type under long-term heating. Studies have further confirmed that the discrepancy of physicochemical characteristics of CMCS/Van blend gel can be attributed to differences in the number of hydrogen bonds compared to CMCS with given group positions of Van isomers. This study provides powerful technical support for the gel crystallization of van isomers.
研究领域:
材料科学
·
药剂学
·
高分子化学
·
分子模拟
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Fujian Li,Min Li,Zhibo Zhu,Yuan Liu,Dandan Han
L-tryptophan, an essential amino acid for protein synthesis and neurotransmitter regulation, tends to crystallize in flake crystals in the crystallization process, resulting in difficulty in processability and poor product quality. Faced with this challenge, in this work, the approach of spherulite growth induced by the polymeric additive was applied to form spherulites of L-tryptophan with effectively improved powder properties. In detail, L-tryptophan spherulites were fabricated through cooling crystallization under the effect of hydroxypropyl methylcellulose (HPMC). Then, the formation mechanism of L-tryptophan spherulites was analyzed based on the results of experiments and molecular simulations. Besides, the effect of supersaturation coupling additive concentration on the morphology of L-tryptophan spherulites was investigated. It turns out that the formation of L-tryptophan spherulites follows the classical non-crystallographic branching for spherulitic growth, in which HPMC preferentially adsorbs on the (001) face of L-tryptophan to introduce stress triggering the branching. Furthermore, the tap density of the prepared L-tryptophan spherulites was improved and nearly 4 times that of the L-tryptophan flake crystals, and the angle of repose of the L-tryptophan flake crystals was 46°, while the angle of repose of L-tryptophan spherulites was 29°, exhibiting the improved flowability for the post-processing. To sum up, this study provides a feasible method for the manufacture of L-tryptophan crystals with good product quality, as well as making efforts to reveal the mechanism of spherulitic growth, which may provide new insight into the structure design of organic crystals.
研究领域:
晶体工程
·
药学
·
材料科学
·
高分子科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Particuology
·
2021
·
IF 3.067
Jinbo Ouyang,Xiaohong Xing,Jian Chen,Limin Zhou,Zhirong Liu,Jerry Y.Y. Heng
Swift cooling crystallization of vanillin was investigated in water, ethanol, isopropanol and ethyl acetate. Morphology and polymorph evolution of vanillin were discussed in terms of solvent, supersaturation ratio and silica template. PXRD, DSC, FTIR and microscope were used to identify polymorphs of vanillin. Results showed that the nucleated polymorphs of vanillin depended largely on the solvent, supersaturation ratio and silica template. Low supersaturation ratios favor the nucleation of stable form I in water, and high supersaturation ratio exceeds 7 generating 100% metastable form II. However, if the supersaturation ratio is too high ( S >8), liquid–liquid phase separation will occur, and no crystals could be obtained. In other solvents such as ethanol, isopropanol and ethyl acetate, only form I was obtained. However, it should be noted that the morphology of form I prepared in ethanol, isopropanol and ethyl acetate is distinct from that obtained in water, the former is flake-like and the latter is rod-like. The nucleation of vanillin from different solution was also studied with the presence of SiO 2 , SiO 2 –NH 2 and SiO 2 −COOH templates, which did not change the nucleated polymorph of vanillin, but changed the nucleation and growth rate of stable form I.
研究领域:
化学工程
·
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2024
·Vol. 98
·期 4
·568-576
·
IF 0.7
Yayuan Zheng
This paper discusses the crystallization kinetics of potassium sulfate in a stirred bed crystallizer through experimental investigation. Using classical nucleation theory, the homogeneous and heterogeneous nucleation mechanisms of potassium sulfate are studied. The induction time and critical nucleation parameters, including surface tension (γ), critical nucleation radius ( r *), critical nucleation free energy (Δ G *), and critical nucleation molecule number ( i *), are measured under different temperatures and supersaturation ratios. Experimental results show that as temperature and supersaturation ratio increase, induction time, critical nucleation free energy, critical nucleation radius, and critical molecule number decrease while nucleation rate increases. The crystal shape remains relatively unchanged with temperature and supersaturation ratio, but the average particle size increases with increasing supersaturation and temperature. Changes in measured nucleation parameters are consistent with classical nucleation theory. In addition, the kinetic equations of crystal nucleation and growth rate in a stirred crystallization system are fitted using population balance equations, and the results show that the growth rate increases with increasing supersaturation and stirring speed. In addition, the effects of the parameters in the nucleation rate equation suggest that suspension density has the greatest impact, followed by supersaturation ratio and stirring speed.
研究领域:
化学工程
·
材料科学
·
物理化学
·
过程工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Qingshun Nian,Weiduo Zhu,Shibing Zheng,Shunqiang Chen,Bing-Qing Xiong,Zihong Wang,Xiaojun Wu,Zhanliang Tao,Xiaodi Ren
The water-in-salt electrolyte (WISE) features intimate interactions between a cation and anion, which induces the formation of an anion-derived solid electrolyte interphase (SEI) and expands the aqueous electrolyte voltage window to >3.0 V. Although further increasing the salt concentration (even to >60 molality (m)) can gradually improve water stability, issues about cost and practical feasibility are concerned. An alternative approach is to intensify ion–solvent interactions in the inner solvation structure by shielding off outward electrostatic attractions from nearby ions. Here, we design an “overcrowded” electrolyte using the non-polar, hydrogen-bonding 1,4-dioxane (DX) as an overcrowding agent, thereby achieving a robust LiF-enriched SEI and wide electrolyte operation window (3.7 V) with a low salt concentration (<2 m). As a result, the electrochemical performance of aqueous Li4Ti5O12/LiMn2O4 full cells can be substantially improved (88.5% capacity retention after 200 cycles, at 0.57 C). This study points out a promising strategy to develop low-cost and stable high-voltage aqueous batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）