JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongyang Lv,Fengyu Tian,Xingxing Cui,Zhenkun Chen,Guangzheng Sun,Yuan Pan,Yichuan Li,Bin Dong,Bin Liu,Yongming Chai,Chenguang Liu
With the trend of heavy and inferior crude oil, the design of hydrodesulfurization (HDS) catalysts with excellent activity and high active metal utilization is an inevitable trend for the upgrading of refining technology. In this study, a highly dispersed Mo catalyst confined within nitrogen-doped porous carbon (xMo@NC) was prepared using an in situ encapsulation-pyrolysis approach and used in the HDS reaction of dibenzothiophene (DBT). The methods of XRD, HRTEM, HAADF-STEM, N 2 physisorption, FT-IR, Raman, and XPS were used to carry out thorough microstructural characterization. The results demonstrated that the Mo species in xMo@NC were highly dispersed, exhibiting superior intrinsic HDS activity compared to MoS 2 /NC* catalysts and conventional supported catalyst MoS 2 /Al 2 O 3 . The xMo@NC catalyst exhibited significant direct desulfurization (DDS) pathway in the HDS reaction of DBT. Differential charge density and bader charge suggested that significant electron transfer between the sulfur atom of DBT and the Mo species of xMo@NC, which weakened the C S bond and made it easier to remove sulfur via DDS pathway during the HDS reaction. This work presents a new catalytic material with high intrinsic activity and enhanced DDS desulfurization selectivity, providing fresh perspectives on the creation of high-performance HDS catalysts.
研究领域:
催化化学
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化学工程
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材料科学
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石油炼制
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Gan Cheng,Yujie Peng,Peigao Duan,Enze Li,Chao Lv,Xin Wang,Fangqin Cheng
Coal remains a primary global energy source, however, the continued exploitation has positioned high-sulfur coal as a critical concern, with its desulfurization remaining a significant technical challenge worldwide. In this study, fine high-sulfur samples were selected for investigation, and a series of flotation and electrochemical methods were employed for desulfurization. The results indicate that both sulfur and ash contents of high-sulfur coal decrease with decreasing particle size. The desulfurization efficiencies for different methods are as follows: 31.04% for flotation, 32.15% for grinding-flotation, 41.08% for electrochemistry, 42.04% for ultrasonic-electrochemistry, 49.51% for electrochemical-flotation, and 51.23% for ultrasonic-electrochemistry-grinding-flotation. Flotation effectively removes most of the inorganic sulfur content, while electrolysis can remove both inorganic sulfur and a portion of organic sulfur content. Grinding facilitates the liberation of sulfur inclusions in coal, while ultrasonic treatment aids in detaching gangue minerals from the coal surface, thereby accelerating the electrochemical reactions. Simulation results show that the C-S bond in coal is more resistant to dissociation than the S-S bond. The oxidation efficacy varies across different crystal planes, with the {111} plane exhibiting the most optimal electrochemical oxidation performance. Furthermore, molecular dynamics simulations indicate that both the collector and electrolytic oxidation affect sulfur migration within the coal matrix.
研究领域:
能源工程
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化学工程
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矿物加工
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电化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-17
·
IF 5.578
Li Jian-Long,Zhao Wei,Zhou Chen,Zhang Ya-Xuan,Li Hong-Mei,Tang Ya-Ling,Liang Xin-Hua,Chen Tao,Tang Ya-Jie
Herein is a first effort to systematically study the significance of carbon-sulfur (C-S) and carbon-amine (C-NH) bonds on the antitumor proliferation activity of podophyllum derivatives and their precise mechanism of apoptosis. Compared with the derivative modified by a C-NH bond, the derivative modified by a C-S bond exhibited superior antitumor activity, the inhibition activity of target proteins tubulin or Topo II, cell cycle arrest and apoptosis induction. Antitumor mechanistic studies showed that the death receptor and the mitochondrial apoptotic pathways were simultaneously activated by the C-S bond modified aromatic heterocyclic podophyllum derivatives with a higher cellular uptake percentage of 60–90% and induction of a higher level of reactive oxygen species (ROS). Only the mitochondrial apoptotic pathway was activated by the C-NH bond modified aromatic heterocyclic podophyllum derivatives, with a lower cellular uptake percentage of 40–50%. This study provided insight into effects of the C-S and C-NH bond modification on the improvement of the antitumor activity of Podophyllum derivatives.
研究领域:
药理学
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肿瘤学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Gongheng Zhang,Fengxiang Yin,Gideon Kofie,Qiuyue Gao,Jie Zhang,Guoru Li,Biaohua Chen
ZIF-67(CoFe) was synthesized using the solvothermal method , and the precursor of ZIF-67(CoFe)/xC-yIL was obtained by grinding the mixture of ZIF-67(CoFe), [BMIM][NTf 2 ] ionic liquid (IL), and carbon black. A series of ZIF-67(CoFe)/xC-yIL-T catalysts were prepared by calcining the precursor at different temperatures. The structure of the catalysts was examined using XRD , TEM, BET and XPS analysis. The results show that the high-temperature treatment of the precursor contributes to the formation of the structure of the N, S-co-doped carbon-coated nanoparticles . The introduction of ionic liquid increases the specific surface area of the catalysts and exposes more active sites. At the same time, as a sulfur source, ionic liquid forms a C-S bond, which is conducive to improving ORR activity. The optimal ORR half-wave potential and limited current density of ZIF-67(CoFe)/1.5 C-45IL-600 are 0.87 V vs. RHE and 4.64 mA cm -2 , respectively, in 0.1 mol L −1 KOH.
研究领域:
材料科学
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电化学
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纳米技术
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催化化学
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能量转换
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）