ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bo-Sheng Zhao,Lu Wang,Sheng Liu,Guo-Ran Li,Xue-Ping Gao
All-solid-state lithium–sulfur batteries (ASSLSBs) have become a promising candidate because of their high energy density and safety. To ensure the high utilization and electrochemical capacity of sulfur in all-solid-state batteries, both the electronic and ionic conductivities of the sulfur cathode should be as high as possible. In this work, an intercalation–conversion hybrid cathode is proposed by distributing sulfur evenly on electroactive niobium tungsten oxide (Nb18W16O93) and conductive carbon nanotubes (CNTs) for achieving high performance ASSLSBs. Herein, Nb18W16O93 shows good electrochemical lithium storage in the hybrid cathode, which could serve as an effective Li-ion/electron conductor for the conversion of sulfur in the discharge/charge processes to achieve a high utilization of sulfur. However, CNTs could further increase the electronic conductivity of the hybrid cathode by constructing good conductive frameworks and suppress the volumetric fluctuation during the interconversion of sulfur and Li2S. With this strategy, the S/Nb18W16O93/CNT cathode achieves a high sulfur utilization of 91% after one cycle activation with a high gravimetric capacity of 1526 mA h g–1. In addition, excellent rate performance is also obtained at 0.5 C with a reversible capacity of 1262 mA h g–1 after 1000 cycles. This work offers a new perspective to develop ASSLSBs.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Fuyu Wang,Gaoyuan Zou,Li Xu,Shihao Fan
The purpose of this study is to investigate the impact of calcium sulfate whiskers (CSW) on the microscopic properties of basalt fiber-reinforced asphalt using the molecular dynamics (MD) simulation. In this study, the asphalt molecular model, fiber-reinforced asphalt molecular model, and asphalt-fiber interface model were established using Materials Studio 8.0 software. Then, the impact of CSW on the microscopic physical properties of basalt fiber-reinforced asphalt and the impact of CSW on the interface interactions in composite fiber-reinforced asphalt were investigated. The results show that the microphysical moduli of basalt fiber-reinforced asphalt can be improved by the addition of CSW. The inclusion of CSW can alleviate the molecular aggregation of asphaltene and resin and enhance the orderliness of asphalt molecules. Moreover, introducing CSW into basalt fiber-reinforced asphalt can elevate the interfacial energy between asphalt and fibers. It also increases the relative concentration distribution of asphalt molecules on the surface of basalt fibers. These indicate that more asphalt has been adsorbed on the surface of the basalt fibers, thereby strengthening the interfacial adhesion between asphalt and fibers. Furthermore, the type of silane coupling agent and the content of CSW are recommended through MD simulation. Finally, the dynamic shear rheolometer test and the multiple stress creep recovery test were used to investigate the rheological and interfacial properties of fiber-reinforced asphalt, and conclusions of laboratory tests correlated well with the results of MD simulation.
研究领域:
材料科学
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土木工程
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化学工程
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产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 1.6
Hao Yan,Wenhua Tong,Jiepeng Wang,Panyu Li,Xuqian Wang,Yongkui Zhang
Waste sulphur produced in industrial processes is often exposed to the air, and its diffusion and combustion in the environment can produce harmful substances, posing a significant risk to ecological safety and human health. Herein, a novel method for the direct treatment of solid sulphur with manganese dioxide based on a simple sealed reactor is proposed. Significantly, the developed sulphur treatment technology could prepare high purity manganese sulphate at the same time. Under the optimum conditions of the reaction temperature of 187.2°C, reaction time of 21.6 h, sulphuric acid loading of 1.00 mol ∙ L −1 , and manganese dioxide dosage of 4.00 mol ∙ mol-S −1 derived by the response surface method (RSM), the removal efficiency of sulphur could reach near 100%, and the purity of the manganese sulphate product obtained was more than 98%. Kinetic model fitting analysis and several characterization methods were adopted to confirm that the reaction process between sulphur and manganese dioxide follows the unreacted nuclear model controlled by surface chemical reaction, and the transformation paths of Mn and S elements were proposed. This study provides a novel method for the resource treatment of waste sulphur and the preparation of high purity manganese sulphate.
研究领域:
环境科学
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材料化学
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产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 100
·期 9
·2417-2431
·
IF 2.5
Hsiwen Wu,Xijun Hu,Minhua Shao,Shuwei Zhang,Guohua Chen
The lithium–sulphur battery is a promising system for next-generation energy storage because of its high energy density and the abundant supply of sulphur. In this study, Magnéli phase Ti 4 O 7 nanotube arrays (NTA) were grown on titanium nitride mesh substrates via anodization of titanium mesh followed by high-temperature reduction under a hydrogen atmosphere. When prepared into a composite material with sulphur via electrodeposition, Ti 4 O 7 NTA provides sulphur with high electronic conductivity and strong polysulphide chemisorption during battery operation. The structure of NTA allows sufficient access of incorporated sulphur to the liquid electrolyte and supports high sulphur loadings per unit area of the electrode. The application of an additional layer of conductive carbon coating to confine electrodeposited sulphur inside the NTA further improved the cell cycling performance. Under sulphur loadings of around 2.0 mg/cm 2 , high values of specific capacity (1604 mAh/g at a 1/20 C rate), ultra-low capacity decay rate (0.03% per cycle for 1800 cycles), and versatile rate capability (660 mAh/g at 2 C and 500 mAh/g at 4 C) were achieved. Under high sulphur loadings of around 5.0 mg/cm 2 , stable cycling (decay rate below 0.10% per cycle) and high areal capacity (4.97 mAh/cm 2 ) were attained.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Heyu Li,Zhe Sun,Yan Cao
Gypsum (GP) by-products are a group of widely sourced sulfur-containing solid wastes and their recycling utilizations are of great significance. This work proposed a new cyclic GP utilization process, achieving both the sulfur recovery and simultaneous value-added syngas byproduct under the restriction of the CO 2 capture. This innovative process integrates the carbon-fueled and calcium-based chemical-looping technology to generate concentrated SO 2 , followed by the recovery of the sulfur to be a concentrating sulfuric acid via the iodine–sulfur thermochemical cycle and finally the CO 2 capture to produce CaCO 3 /(NH 4 ) 2 SO 4 by the use of the in-situ generating calcium adsorbent via the NH 3 -Merseburg process. Its feasibility was thermodynamically and experimentally validated. It’s found that the elevated temperature and the weak reducing atmosphere were conducive to a nearly 100% thermally-decomposed of GP (mainly CaSO 4 ) toward a mixture of CaS and CaO (a ratio in 4:6) and the maximum per pass carbon conversion over 80% using carbon fuels (coal), and the carbon residues can be recovered back to carbon fuel stream. The recovery of I 2 can be achieved through the electrochemical electrolysis method and then recycled. The optimization of heat exchange network results in energy consumption reduction by 79.6% and 75.2% for hot and cold utilities, respectively.
研究领域:
环境科学
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化学工程
·
能源工程
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Zuoshu Wang,Xiaoyu Yang,Yingjun Wei,Dewei Wang
Cathodes for aqueous zinc-sulfur batteries (AZSBs) produced via the conventional melt-infiltration technique face issues such as non-uniform sulfur distribution and a lack of active sites, which lead to sluggish redox reactions and considerable voltage hysteresis in AZSBs. In this study, we introduce an alternative approach where amorphous sulfur is encapsulated in situ within three-dimensional hierarchical porous carbons (S-HPCs). The versatility of this strategy is demonstrated by its applicability to various precursors. As a typical example, the resulting S-HPCs exhibits a significantly higher specific surface area of 494.4 m 2 g −1 , compared to the mere 6.4 m 2 g −1 of cathode prepared via traditional melt-infiltration methods. This enhancement means an increase in active sites and an enlarged electrode-electrolyte interface, which in turn, accelerates electrode reaction kinetics. The S-HPCs cathode is capable of delivering a reversible capacity of 1493.4 mA h g⁻ 1 at 0.5 A g⁻ 1 , with a narrowed polarization potential of just 0.42 V. They also demonstrate a high-rate performance of 849.2 mA h g⁻ 1 at 5 A g⁻ 1 , along with enduring stability over 845 cycles at 5 A g −1 . This work not only presents a high-performance cathode for AZSBs but also offers strategies for enhancing the kinetics and cycle stability of AZSBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 21
·12726-12735
·
IF 3.269
Zhongqiang Ding,Xueliang Li,Pei Zhang,Jingjian Yu,Yang Hua
Ultrafine Y2O3 modified carbon aerogels (Y-CAs) were successfully fabricated via in situ and sol–gel methods. The Y-CA materials exhibit interconnected porous structures and high adsorption ability. The Y-CA/S composites loaded with sulfur served as cathode materials in lithium–sulfur batteries to suppress the polysulfide diffusion and offer high electrical conductivity during the charge/discharge process. In particular, the designed Y2-CA/S cathode exhibits a high initial discharge capacity of 1369 mA h g−1 and retained 1108 mA h g−1 after 100 cycles at 0.2C. The Y2-CA/S cathode presents a good rate capability of 994 mA h g−1 up to 2C and nice long-term cycling stability with a high reversible capacity of 892 mA h g−1 after 300 cycles at 0.5C. The excellent electrochemical performance of the batteries is attributed to high adsorption ability and the uniform Y2O3 distribution on the porous and interrelated carbon spheres.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Wei-Hao Zhang,Han-Yan Luo,Jing Fang,Chen-Liang Zhao,Kam-Chun Chan,Yui-Man Chan,Cai-Xia Dong,Hu-Biao Chen,Zhong-Zhen Zhao,Song-Lin Li,Jun Xu
We previously found that sulfur fumigation, a commonly used controversial method for the post-harvest handling of ginger, induces the generation of a compound in ginger, which was speculated to be a sulfur-containing derivative of 6-shogaol based on its mass data. However, the chemical and biological properties of the compound remain unknown. As a follow-up study, here we report the chemical structure, systemic exposure, and anticancer activity of the compound. Chromatographic separation, nuclear magnetic resonance analysis, and chemical synthesis structurally elucidated the compound as 6-gingesulfonic acid. Pharmacokinetics in rats found that 6-gingesulfonic acid was more slowly absorbed and eliminated, with more prototypes existing in the blood than 6-shogaol. Metabolism profiling indicated that the two compounds produced qualitatively and quantitatively different metabolites. It was further found that 6-gingesulfonic acid exerted significantly weaker antiproliferative activity on tumor cells than 6-shogaol. The data provide chemical and biological evidence that sulfur fumigation may impair the healthcare functions of ginger.
研究领域:
药理学
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化学
·
毒理学
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癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2018
·
IF 4.908
Honghua Zhang,Hongguo Tang,Jiakuo Xu,Yajing Li,Zhiqiang Yang,Ruixia Liu,Suojiang Zhang,Yanji Wang
The aromatic-compound additive in sulfuric acid (H 2 SO 4 ) was found to promote isobutane/butene alkylation significantly. The selectivity of isooctane (C 8 ) and the alkylate research octane number increased by 23.46% and 5.09, respectively, when thiophene was added to H 2 SO 4 , especially. The proportion of trimethylpentanes can be improved from 58.57% to 84.58%, and the ratio of trimethylpentanes to dimethylhexanes was doubled, compared with that in the presence of H 2 SO 4 alone. The improved performance in the presence of thiophene additive in H 2 SO 4 is attributed to the improvement in carbenium-ion stability and the acceleration of hydrogen proton release, because of the existence of electron-rich π-bond compounds, and the substitution of thiophene in the alpha site by the sulfonic group and isobutane/butene. Reaction parameters such as reaction temperature, reaction time, stirring speed, feed rate, and acid/hydrocarbon volumetric ratio were also investigated in detail. The synergetic mechanism of thiophene-H 2 SO 4 on isobutane/butene alkylation was also speculated.
研究领域:
化学工程
·
催化反应
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产品关联
DOI
高影响因子
JOURNAL OF FOOD QUALITY
·
2025
·Vol. 2025
·期 1
·1362752
·
IF 2.9
Qi Wei,Jie Zhang,Shanlian Qiu
Laetiporus sulphureus is an edible and medicinal mushroom. Laetiporus sulphureus polysaccharide (LSP) is an effective biological agent for alleviating the oxidative stress. The aim of this study was to evaluate the antioxidant activity and hypolipidemic effect of LSP. In vitro antioxidant activity of LSP were evaluated by assessing the ability to scavenge free radicals, including 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl (•OH), and 3-ethylbenzoth-iazoline-6-sulfonic acid (ABTS). In vivo antioxidant activity and hypolipidemic effect of LSP were evaluated by the model of Caenorhabditis elegans ( C. elegans ). Antioxidant test results showed that LSP (1 mg/mL) could scavenge the radicals of DPPH, •OH, and ABTS, with the inhibition value of 40.41%, 12.68%, and 62.74%, respectively. In addition, LSP increased the activity of catalase (CAT) and superoxide dismutase (SOD) in C. elegans . This research also found that LSP (1 mg/mL) could decrease the malondialdehyde (MDA) content (67%), reactive oxygen species (ROS) content (62%), and relative fat level (55%) in C. elegans , compared with the control group. The present findings suggested that LSP could alleviate hyperlipidemia by decreasing the MDA content and fat accumulation in C. elegan s. The above results suggested that LSP could be used as a potential approach to alleviate hyperlipidemia as well as contribute to the development of LSP-related products.
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DOI
高影响因子
JOURNAL OF MOLECULAR RECOGNITION
·
2016
·Vol. 30
·期 1
·e2566
·
IF 2.091
Hua-jin Zeng,Min Miao,Ran Yang,Ling-bo Qu
In this study, the fibrillation of hen egg-white lysozyme (HEWL) in the absence and presence of different concentrations of silybin was studied by thioflavin T spectroscopy, Congo red binding assays, 8-anilino-1-naphthalenesulfonic acid (ANS) fluorescence assay, circular dichroism, and transmission electron microscopy. The experimental results indicated that not only the fibrillation of HEWL at high temperature (65°C) and low pH (pH = 2.0) could be inhibited effectively by silybin but also the inhibition of HEWL by silybin followed a dose-dependent manner. Molecular docking studies indicated that 2 possible binding modes could be found in the interaction between silybin and HEWL via van der Waals forces and electrostatic forces as well as hydrogen bonding. One of these 2 conformations was directly entered into the cavity of HEWL (binding site I); the other was bound to the surface of HEWL (binding site II). In this way, silybin could not only increase the hydrophobicity of the cavity or the surface of HEWL but also influence the microenvironment of the binding site, which was able to stabilize the structure of HEWL and delay the process of HEWL fibrosis.
研究领域:
生物化学
·
分子生物学
·
蛋白质科学
·
药理学
·
结构生物学
✓ 已验证
DOI
高影响因子
Chemical and Biological Technologies in Agriculture
·
2024
·Vol. 11
·期 1
·1-13
·
IF 5.2
Qu Yunhe,Zhang Pingping,Zhao Boya,Xu Jing,Shi Dongfang
The total polysaccharides extracted from Laetiporus sulphureus fruiting bodies by ultrasound-assisted complex enzyme method were separated by freeze–thaw combined with fehling reagent to prepare purified polysaccharide (LSPS1). The results of monosaccharide composition and molecular weight distribution demonstrated that LSPS1 contained galactose (51.83%), mannose (26.89%), fucose (16.13%) and glucose (5.15%), and the molecular weight was around 17.3 kDa. Methylation analysis indicated that the backbone of LSPS1 consisted of 1,6-Gal p residues, branched at O-2 of Gal p with t-Man p , t-Fuc p and t-Glc p residues as side chains. In addition, LSPS1 was used for the synthesis of SeNPs based on the redox system of sodium selenite and ascorbic acid. The L. sulphureus polysaccharide selenium nanoparticles (LSPS1–SeNPs) were characterized by UV, FT-IR, ICP-MS, EDX, DLS and SEM, inferring that LSPS1–SeNPs were stabilized with spherical and granular surface structure as well as a mean particle size of 96.72 ± 1.12 nm. Both of LSPS1 and LSPS1–SeNPs possessed strong antioxidant and hypoglycemic activities while the effects of LSPS1–SeNPs were superior to LSPS1. The findings provided valuable structural information for L. sulphureus polysaccharide, and will promote the application of SeNPs by L. sulphureus polysaccharide in potential antioxidant agent and hypoglycemic candidate. Graphical
研究领域:
生物化学
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药理学
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纳米医学
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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）