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学者姓名：钟守超
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Abstract ：
A solid ionic liquid adsorbent, obtained by grafting [C3N][SO4H] onto porous carbon was reported. Characterizations including IR, XPS and TEM provided the structural information of the sulfonic acid groups on the porous carbon matrix, affirming the feasibility of this synthesis method. The results elucidated the synergy between the sulfonic acid groups and the pore structure of porous carbon, resulting in substantial enhancements in both ammonia adsorption capacity and adsorption selectivity. Moreover, this absorbent exhibited the ability to capture minute concentrations of ammonia below 0.1 ppm with great efficacy and excellent regeneration property within 8 cycles. This simple grafting and acid activation technique proffers a valuable tool for designing adsorbent of trace ammonia within ammonia-hydrogen fuel cells.
Keyword ：
Ammonia fuel cells Ammonia fuel cells Porous carbon Porous carbon Solid ionic liquids Solid ionic liquids Trace ammonia capture Trace ammonia capture
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| GB/T 7714 | Zhu, Qiliang , Zhang, Wentao , Zhong, Shouchao et al. Precisely capture trace ammonia from fuel cell system over ionic liquid grafted hierarchically porous carbons [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 483 . |
| MLA | Zhu, Qiliang et al. "Precisely capture trace ammonia from fuel cell system over ionic liquid grafted hierarchically porous carbons" . | CHEMICAL ENGINEERING JOURNAL 483 (2024) . |
| APA | Zhu, Qiliang , Zhang, Wentao , Zhong, Shouchao , Xiao, Yao , Qian, Hao , Zheng, Anmin et al. Precisely capture trace ammonia from fuel cell system over ionic liquid grafted hierarchically porous carbons . | CHEMICAL ENGINEERING JOURNAL , 2024 , 483 . |
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Abstract ：
Herein, a variety of 2,6-diaminopyridine (DAP) derived nitrogen-doped hierarchically porous carbon (DAP-NHPC-T) prepared from carbonization-induced structure transformation of DAP-Zn-SiO2-P123 nanocomposites are reported, which are facilely prepared from solvent-free co-assembly of block copolymer templates P123 with pyridine-rich monomer of DAP, Zn(NO3)2 and tetramethoxysilane. In the pyrolysis process, P123 and SiO2 templates promote the formation of mesoporous and supermicroporous structures in the DAP-NHPC-T, while high-temperature volatilization of Zn contributed to generation of micropores. The DAP-NHPC-T possess large BET surface areas (≈956–1126 m2 g−1), hierarchical porosity with micro-supermicro-mesoporous feature and high nitrogen contents (≈10.44–5.99 at%) with tunable density of pyridine-based nitrogen sites (≈5.99–3.32 at%), exhibiting good accessibility and reinforced interaction with SO2. Consequently, the DAP-NHPC-T show high SO2 capacity (14.7 mmol g−1, 25 °C and 1.0 bar) and SO2/CO2/N2 IAST selectivities, extraordinary dynamic breakthrough separation efficiency and cycling stability, far beyond any other reported nitrogen-doped metal-free carbon. As verified by in situ spectroscopy and theoretical calculations, the pyridine-based nitrogen sites of the DAP-NHPC-T boost SO2 adsorption via the unique charge transfer, the adsorption mechanism and reaction model have been finally clarified. © 2024 Wiley-VCH GmbH.
Keyword ：
charge transfer charge transfer hierarchical porosity hierarchical porosity pyridine-based nitrogen sites pyridine-based nitrogen sites SO2 capture SO2 capture triple template directed synthesis triple template directed synthesis
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| GB/T 7714 | Zhang, G. , Liu, F. , Zhu, Q. et al. Triple Templates Directed Synthesis of Nitrogen-Doped Hierarchically Porous Carbons from Pyridine Rich Monomer as Efficient and Reversible SO2 Adsorbents [J]. | Small , 2024 . |
| MLA | Zhang, G. et al. "Triple Templates Directed Synthesis of Nitrogen-Doped Hierarchically Porous Carbons from Pyridine Rich Monomer as Efficient and Reversible SO2 Adsorbents" . | Small (2024) . |
| APA | Zhang, G. , Liu, F. , Zhu, Q. , Qian, H. , Zhong, S. , Tan, J. et al. Triple Templates Directed Synthesis of Nitrogen-Doped Hierarchically Porous Carbons from Pyridine Rich Monomer as Efficient and Reversible SO2 Adsorbents . | Small , 2024 . |
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Ordered mesoporous carbon@silica hybrid frameworks with high nitrogen content and good stabilities show great significance to improve their functionalities. Herein, we report novel nitrogen-doped (3.51 - 4.62 wt%) and ordered mesoporous carbon@silica frameworks (N-OMC@SiO2) with reinforced nitrogen stability. The NOMC@SiO2 were designed from tricomponent direct co-assembly between block copolymer template and mixed precursors containing urea and tetramethoxysilane without using additional solvent. The N-OMC@SiO2 have large BET surface areas (444.3 - 674.9 m2/g), uniform mesoporous channels (5.8 - 10.9 nm) with well-defined hexagonal symmetry, and stable carbon@silica "reinforced concrete" framework that can be transformed into carbon@silicon by controllable reduction. The nitrogen sites were firmly embedded into their frameworks via the formation of Si-N bonding. Thus, the resulted N-OMC@SiO2 exhibit multi-functionalities and enhanced recyclability in acid waste gas capture and gaseous sulfides catalytic utilization, better than many reported porous adsorbents and catalysts. This study may help develop stable and efficient N-OMCs nanocomposites for acidic gas selective removal.
Keyword ：
Acid gas selective capture Acid gas selective capture Carbon@silica composites Carbon@silica composites Gaseous sulfides elimination Gaseous sulfides elimination Nitrogen -doping Nitrogen -doping Ordered mesoporosity Ordered mesoporosity Solvent -free synthesis Solvent -free synthesis
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| GB/T 7714 | Kan, Xun , Liu, Zihao , Sun, Yafei et al. Tricomponent direct co-assembly to nitrogen-doped, ordered mesoporous carbon@silica frameworks with enhanced nitrogen stability and multi-functionalities [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
| MLA | Kan, Xun et al. "Tricomponent direct co-assembly to nitrogen-doped, ordered mesoporous carbon@silica frameworks with enhanced nitrogen stability and multi-functionalities" . | CHEMICAL ENGINEERING SCIENCE 292 (2024) . |
| APA | Kan, Xun , Liu, Zihao , Sun, Yafei , Zhong, Shouchao , Zheng, Yong , Liang, Shijing et al. Tricomponent direct co-assembly to nitrogen-doped, ordered mesoporous carbon@silica frameworks with enhanced nitrogen stability and multi-functionalities . | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
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