Arabian Journal of Chemistry
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2024
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IF 5.3
Shaochen Li,Qingyong Zhao,Jianhua Xiong,Nahid Pervez,Lina Lin,Yingjie Cai,Vincenzo Naddeo
Liquid ammonia dyeing emerges as an environmentally benign and sustainable option for the textile industry, characterized by a minimal ecological impact. However, its adoption is hampered by certain limitations, such as suboptimal dye exhaustion and issues with color uniformity, which present significant hurdles to its widespread industrial application. Building on the premise that the addition of water to an ethanol solvent can enhance reactive dye exhaustion in cotton fiber dyeing, this study delves into the dyeing behavior of ramie fiber using a water-liquid ammonia mixture with Reactive Red 195. The incorporation of water into the liquid ammonia solution was observed to marginally decrease the color strength (K/S value) of the dyed ramie fiber, compared to the dyeing with anhydrous liquid ammonia. This reduction is likely due to the diminished expansion of the amorphous regions within the fiber. However, the color levelness of the dyed ramie fiber was enhanced by the addition of water to the liquid ammonia. To decipher the influences on the dyeing process, the Taguchi method, utilizing an orthogonal array (L16), was applied. The analysis revealed that the dye mass factor was the predominant influencer (79.08 %), followed by the liquor ratio factor (18.53 %), with both factors demonstrating statistically significant effects (p < 0.05). A multifaceted analysis of the samples was conducted using advanced techniques such as XRD (X-ray diffraction), FTIR (Fourier transform infrared), TGA (thermogravimetric analysis), and SEM (scanning electron microscopy). These analyses confirmed that the water-liquid ammonia treatment induced changes in the samples’ properties. The treated samples exhibited lower barium activity numbers and breaking force values, indicating structural alterations. Furthermore, the molecular structure of Reactive Red 195 remained intact throughout the dyeing process in the water-liquid ammonia mixture, thereby affirming its viability for practical applications in the textile industry.
研究领域:
纺织科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 6
·2715-2723
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IF 6.482
Xiaojing Feng,Zhongnan Guo,Xiaoxiao Yan,Jun Deng,Dan Wu,Zijing Zhang,Fan Sun,Wenxia Yuan
Metal phosphorus trichalcogenides (MPX3) are of great interest since these layered materials exhibit wide applications in optical, electrical and magnetic fields. An effective chemical intercalation route for MPX3 which could regulate their physical properties, however, is still lacking. In this work, we show that the liquid ammonia method is an efficient route to co-intercalate alkali metals and NH3 molecules into the gaps in FePS3. After intercalation, the interlayer distance is significantly enlarged by ∼3 Å while the monoclinic lattice (C2/m space group) is still maintained. The structure refinement and EDS measurement suggest that intercalation does not induce any Fe vacancy, thus leading to electron transfer from the alkali metal to [FePS3] layers. Interestingly, magnetic susceptibility shows that the intrinsic anti-ferromagnetic transition in the FePS3 matrix is completely suppressed by this intercalation, whereas a spin-glass state is observed in A(NH3)xFePS3 (A = Li, K) in the lower temperature range (<50 K). The intercalation described in this work is reversible: the alkali metal can be easily de-intercalated using a two-step route and the anti-ferromagnetism reappears accordingly. Meanwhile, the liquid ammonia method is also shown to be efficient at intercalating other MPS3 materials (M = Mn, Co, Ni). Our work not only enriches the intercalation chemistry in the MPX3 system but also provides an excellent route to regulate the magnetic properties of these layered materials.
研究领域:
材料科学
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无机化学
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凝聚态物理
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纳米技术
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功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2016
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IF 3.205
Bao-Xia Dong,Hui Tian,Yi-Chen Wu,Fan-Yan Bu,Wen-Long Liu,Yun-Lei Teng,Guo-Wang Diao
Liquid ammonia electrolysis is conducted out at ambient temperature using different ammonium salt electrolytes with and without the reference electrode. It is determined that electrolytes containing NH 4 + increase the current density and reduce the solution resistance. Moreover, ammonium salts of NH 4 Br, NH 4 NO 3 and NH 4 Cl preserve >80% current efficiency and a 0.6–0.8 mL min −1 average rate of H 2 generation during chronopotentiometry tests at 120 mA cm −2 for 3 h. A minimum electrolysis voltage ( E min ) of ca . 1.2 V is required for the NH 4 Cl electrolyte when using Pt-foil as the anode and cathode . To decrease the overpotential of the anode reaction, five types of electrocatalysts were prepared and characterized: Pt-black, Rh, Pt–Ir, Rh–Pt and Ph–Pt–Ir alloys. Trimetallic Rh–Pt–Ir and bimetallic Pt–Ir, Rh–Pt (1:1) alloy electrodes exhibit a combined benefit of better activity and minimized deactivation. The ternary Rh–Pt–Ir alloy anode shows the best electrocatalytic activity with the lowest E min of ca . 0.47 V and highest current density of 46.9 mA cm −2 at 2.0 V. In comparison with the Pt-foil anode, the E min is reduced by two-thirds, and the current density is increased two-fold.
研究领域:
化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Metabolites
·
2025
·Vol. 15
·期 9
·625
·
IF 3.7
Hai Zhao,Kangwei Shen,Wei Fan,Mengjie Li,Xuejun Kang
Purpose: To explore the potential relationship between salivary amino acid concentrations and 8 km running performance in male undergraduate students. Methods: Thirty male undergraduate students were recruited. Participants completed an 8 km run while wearing smart bracelets. Saliva samples were collected before, immediately after, and 24 h after the run. Ultra-High Performance Liquid Chromatography (UHPLC) was used to quantify salivary amino acids. Results: The fast group (average speed > 12.80 km/h) had a significantly shorter running time (35.66 ± 1.30 min,p< 0.001) and higher speed (13.59 ± 0.46 km/h,p< 0.001) than the slow group. Before the run, salivary serine concentration (20.19 µg/mL,p= 0.013) was higher in the fast group. After 24 h, salivary glutamine concentration (6.65 µg/mL,p= 0.047) was lower in the fast group. Salivary threonine concentration was positively correlated with running speed. For every 1 µg/mL increase in salivary threonine concentration, average running speed increased by 0.011 km/h, and this correlation persisted after adjusting for age and heart rate. Conclusions: This study found a positive correlation between salivary threonine and 8 km running speed, along with differences in serine and glutamine concentrations among runners with different speeds. These findings provide preliminary evidence for the relationship between salivary amino acid concentrations and running performance, though further research with larger samples and diverse exercise types is needed.
研究领域:
运动医学
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生理学
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生物化学
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营养学
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代谢组学
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转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Zhiyuan Kong,Sibao Liu,Hongwang Liu,Guozhu Liu
Endothermic hydrocarbon fuel is the most utilized coolant in regenerative cooling technology for the high-speed aircraft, but it is challenged by the limited heat sink and severe coke deposition. In this study, we propose liquid ammonia as a promising carbon-free fuel with high heat sink for advanced vehicles or aircrafts. The chemical heat sink originates from the endothermic decomposition reaction of ammonia. A series of Ru/CeO2–Al2O3 catalytic coatings were fabricated on stainless-steel tubes using the washcoating method to catalyze the ammonia decomposition reaction and enhance chemical heat sink. The catalytic performance of these Ru/CeO2–Al2O3 coatings for ammonia decomposition was evaluated using an electrically heated tubular reactor. With the Ru/CeO2–Al2O3 coatings of 19 μm, ammonia conversion reaches up to 65%, and a remarkable high heat sink of 5.9 MJ/kg was achieved at 800 °C and 5 MPa. This value is ca. 68% higher than that of the typical hydrocarbon fuel JP-7. This work shows that liquid ammonia can serve as a novel generation high heat sink fuel for advanced engines and aircrafts.
研究领域:
航空航天工程
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
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