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学者姓名:张夏兰
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The effective solution to current energy and environmental issues lies in the advancement of renewable energy conversion and storage technologies. In this work, an ultra-thin-walled hierarchical porous carbon (UHPC) with fluffy three-dimensional (3D) interconnected network structure was synthesized by pyrolysis of petroleum residue and aluminum isopropoxide. Then, a nitrogen-sulfur co-doped UHPC (NS-UHPC) was prepared and employed as a sulfur-loading host to achieve NS-UHPC@S composite after sulfur impregnation. After that, the electrochemical performances are explored utilizing the NS-UHPC@S composite as electrode active material for lithium-sulfur battery (LSB). The as-prepared NS-UHPC possesses a specific surface area of 1031.32 m2 g-1 and a pore volume of 0.82 cm3 g-1 with abundant active sites for absorption of polysulfides. Meanwhile, it maintains a fluffy 3D interconnected network structure with graphene-like sheets on its surface. The sulfur loading of the NSUHPC reaches as high as 79.58 wt% after sulfur impregnation. In addition, the resulting NS-UHPC@S composite exhibits an initial specific capacity of 1255.17 mAh g-1 at 0.1C, and after 700 cycles, the capacity decay rate per cycle is 0.0323 %, demonstrating its excellent cycling stability. Therefore, the NS-UHPC is a desirable sulfurloading host for high-performance LSB.
Keyword :
Electrode material Electrode material Hierarchical porous carbon Hierarchical porous carbon lithium -sulfur batteries lithium -sulfur batteries Nitrogen -sulfur co -doping Nitrogen -sulfur co -doping
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GB/T 7714 | Bi, Tiantian , Zheng, Weiyi , Zhou, Yunhong et al. Three-dimensional N, S co-doped ultra-thin-walled hierarchical porous carbon as sulfur-loading host for high-performance lithium-sulfur battery [J]. | JOURNAL OF ENERGY STORAGE , 2024 , 93 . |
MLA | Bi, Tiantian et al. "Three-dimensional N, S co-doped ultra-thin-walled hierarchical porous carbon as sulfur-loading host for high-performance lithium-sulfur battery" . | JOURNAL OF ENERGY STORAGE 93 (2024) . |
APA | Bi, Tiantian , Zheng, Weiyi , Zhou, Yunhong , Lin, Qilang , Zhang, Xialan . Three-dimensional N, S co-doped ultra-thin-walled hierarchical porous carbon as sulfur-loading host for high-performance lithium-sulfur battery . | JOURNAL OF ENERGY STORAGE , 2024 , 93 . |
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Developing effective adsorbents for wastewater purification is crucial, as excessive emissions of toxic dyes and heavy metal ions have been proven harmful to ecosystems and human health. A NiFe-layered double hydroxide/graphitic porous carbon (NiFe-LDH/GPC) composite was fabricated by introducing NiFe-LDH nanosheets into GPC via a simple hydrothermal method to utilize the advantages of both materials fully, and thus ultimately obtain a composite adsorbent with improved adsorption properties. The samples obtained were comprehensively characterized by various characterization means, and the effects of several critical influential factors on the pollutant uptake capability of the NiFe-LDH/GPC were also studied through batch experiments. The results show that the as-synthesized NiFe-LDH/GPC exhibits a three-dimensional (3D) fluffy ultrathin-wall hierarchical porous structure, which possesses a high specific surface area and pore volume separately up to 506.74 m2/g and 0.22 cm3 g−1 as well as a relatively narrow pore size distribution. These characteristics bring advantages to enhance the adsorption ability of the NiFe-LDH/GPC for cationic/anionic dyes and heavy metal ions such as congo red (CR), malachite green (MG) and hexavalent chrome (Cr(VI), which reached the maximum adsorption capacity of 1726.51 mg/g, 1157.11 mg/g and 155.72 mg/g under the optimum conditions, respectively. Meanwhile, the adsorption behavior can be well described by the pseudo-second-order kinetic model and Langmuir isotherm model, reflecting that the sorption process mainly occurred chemically in the adsorbent monolayer. Furthermore, the NiFe-LDH/GPC maintained relatively high adsorption performance after multicycle testing, manifesting its good recyclability and stability. © 2024 Elsevier B.V.
Keyword :
Adsorption Adsorption Cationic/anionic pollutant Cationic/anionic pollutant GPC GPC Hierarchical Hierarchical LDH nanosheet LDH nanosheet
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GB/T 7714 | Zhang, X. , Li, W. , Wang, X. et al. A novel 3D hierarchical NiFe-LDH/graphitic porous carbon composite as multifunctional adsorbent for efficient removal of cationic/anionic dyes and heavy metal ions [J]. | Journal of Molecular Liquids , 2024 , 411 . |
MLA | Zhang, X. et al. "A novel 3D hierarchical NiFe-LDH/graphitic porous carbon composite as multifunctional adsorbent for efficient removal of cationic/anionic dyes and heavy metal ions" . | Journal of Molecular Liquids 411 (2024) . |
APA | Zhang, X. , Li, W. , Wang, X. , Su, M. , Lin, Q. . A novel 3D hierarchical NiFe-LDH/graphitic porous carbon composite as multifunctional adsorbent for efficient removal of cationic/anionic dyes and heavy metal ions . | Journal of Molecular Liquids , 2024 , 411 . |
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为培养适应社会发展需要的应用型创新人才,文章针对高分子化学实验课程传统教学存在的问题,提出了一种虚拟仿真实验教学与传统实验教学相结合的实验教学模式。该教学模式的实施,有助于弥补传统实验教学的不足,激发学生的学习兴趣,锻炼学生的实践能力和创新思维,提高教学质量和效率,促进应用型创新人才的培养。
Keyword :
实验教学 实验教学 虚实结合 虚实结合 虚拟仿真 虚拟仿真 高分子化学实验 高分子化学实验
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GB/T 7714 | 张夏兰 , 吕秋丰 , 靳艳巧 et al. 虚实结合的高分子化学实验课程教学改革探索 [J]. | 化工高等教育 , 2024 , 41 (04) : 142-149 . |
MLA | 张夏兰 et al. "虚实结合的高分子化学实验课程教学改革探索" . | 化工高等教育 41 . 04 (2024) : 142-149 . |
APA | 张夏兰 , 吕秋丰 , 靳艳巧 , 林起浪 . 虚实结合的高分子化学实验课程教学改革探索 . | 化工高等教育 , 2024 , 41 (04) , 142-149 . |
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本文以“双一流”建设为背景,以《高分子化学实验》课程为研究对象,并结合多年的教学实践经验,简要介绍了在教学过程中所遇到的一些问题。基于“双一流”建设对创新人才培养的理念,我们提出了相应的教学改革措施,涉及到实验课程的教学内容、教学方法以及考核方式等方面。这些措施旨在培养和提高学生的学习主动性和创新能力,从而推进《高分子化学实验》课程的建设。
Keyword :
创新人才 创新人才 双一流建设 双一流建设 教学改革 教学改革 高分子化学实验 高分子化学实验
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GB/T 7714 | 陈玉龙 , 曹静 , 张夏兰 . “双一流”建设背景下《高分子化学实验》课程教学改革探索 [J]. | 广东化工 , 2023 , 50 (20) : 226-227,222 . |
MLA | 陈玉龙 et al. "“双一流”建设背景下《高分子化学实验》课程教学改革探索" . | 广东化工 50 . 20 (2023) : 226-227,222 . |
APA | 陈玉龙 , 曹静 , 张夏兰 . “双一流”建设背景下《高分子化学实验》课程教学改革探索 . | 广东化工 , 2023 , 50 (20) , 226-227,222 . |
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Nowadays, the reduction of dye contaminants in the aquatic environment has attracted widespread research attention. In this work, a novel mesoporous carbon nanospheres (MCNs)-based material as an adsorbent for dye removal was achieved by the carbonization of a composite of sucrose and aluminum sulfate without involving any hazardous activators. The as-obtained MCNs were analyzed by TG, XRD, FESEM, TEM, Raman, BET and XPS, meanwhile the batch experiments of Congo red (CR), Malachite green (MG) and Methylene blue (MB) on the MCNs were conducted to explore the impact of adsorption conditions on the adsorption process, respectively. Results show that the MCNs exhibit a uniform spherical morphology as well as partially graphitic structure with a large surface area of 449.25 m2/g, a relatively narrow pore size distribution and a high pore volume of 0.57 cm3 g-1. The unique porous structure of the MCNs endows it with high adsorption capabilities for dyes, including CR (1726.60 mg g-1), MG (980.55 mg g-1) and MB (708.82 mg g-1), suggesting its high adsorption capability for both anionic and cationic dyes. Meanwhile, the adsorption process is demonstrated to follow the Langmuir model and pseudo-second-order kinetic model, respectively, and the main adsorption mechanisms may involve pore filling, 7C-7C conjugation, electrostatic attraction and hydrogen bonding. Furthermore, the as-synthesized adsorbent displays good recyclability performance for remaining relatively high sorption performance even after five regeneration cycles.
Keyword :
Adsorption Adsorption Dye Dye Mesoporous carbon nanosphere Mesoporous carbon nanosphere Pyrolysis Pyrolysis Sucrose Sucrose
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GB/T 7714 | Zhang, Xialan , Wang, Xin , Cheng, Ting et al. A novel mesoporous carbon nanospheres-based adsorbent material with desirable performances for dyes removal [J]. | JOURNAL OF MOLECULAR LIQUIDS , 2023 , 390 . |
MLA | Zhang, Xialan et al. "A novel mesoporous carbon nanospheres-based adsorbent material with desirable performances for dyes removal" . | JOURNAL OF MOLECULAR LIQUIDS 390 (2023) . |
APA | Zhang, Xialan , Wang, Xin , Cheng, Ting , Lin, Qilang . A novel mesoporous carbon nanospheres-based adsorbent material with desirable performances for dyes removal . | JOURNAL OF MOLECULAR LIQUIDS , 2023 , 390 . |
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A novel Fe-containing carbon foam (Fe-CF) was achieved with a hierarchical porous structure by carbonization of nano-magnesium oxide/epoxy resin mixture followed by Fe(NO3)3 activation. The structures and properties of as-prepared Fe-CF were characterized via XRD, compression strength test, FESEM, TEM, BET, Raman and XPS, meanwhile the effects of adsorption conditions on the removal performance of Congo red (CR), Malachite green (MG) and Methylene blue (MB) by the Fe-CF are investigated through batch adsorption experiments. Results show that the Fe-CF obtained at 1000 degrees C possesses a fluffy and porous structure without obvious collapse and closure, and the iron oxide particles are evenly distributed on its surface, which endows it with high adsorption capacities for CR (1263.36 mg g- 1), MG (679.84 mg g- 1) and MB (483.66 mg g- 1) at the optimum conditions, respectively. Furthermore, the adsorption process can be depicted well by the Langmuir and pseudo-second-order models, and the thermodynamic analysis results reflect that the adsorption processes are thermodynamically feasible and spontaneous. More importantly, the prepared adsorbent retains relatively high adsorption ability and stability even after five regeneration cycles.
Keyword :
Activation Activation Adsorption Adsorption Dye Dye Fe-containing carbon foam Fe-containing carbon foam Hierarchical porous structure Hierarchical porous structure
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GB/T 7714 | Zhang, Xialan , Lin, Liwei , Gao, Wei et al. A novel Fe-containing carbon foam with hierarchical porous structure for efficient removal of organic dyes [J]. | DIAMOND AND RELATED MATERIALS , 2023 , 140 . |
MLA | Zhang, Xialan et al. "A novel Fe-containing carbon foam with hierarchical porous structure for efficient removal of organic dyes" . | DIAMOND AND RELATED MATERIALS 140 (2023) . |
APA | Zhang, Xialan , Lin, Liwei , Gao, Wei , Zhou, Yunhong , Lin, Qilang . A novel Fe-containing carbon foam with hierarchical porous structure for efficient removal of organic dyes . | DIAMOND AND RELATED MATERIALS , 2023 , 140 . |
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