相关实验视频
Updated: Jun 24, 2025
05:26
Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
2.5K
关于在炭石的石墨化过程中形成核心外结构的机制的研究
Tian Qiu1, Weining Xie2,3, Xuejie Bai1
1School of Mechanical & Electrical Engineering, Xuzhou University of Technology, Xuzhou 221018, Jiangsu, China.
ACS omega
|June 3, 2024
概括
具有核心外结构的合成石墨是使用 antracite 和 almandine 创建的. 这种新的方法为天然石墨短缺提供了潜在的解决方案,并推动了煤炭化学应用.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 地质地质地质地质地质地
背景情况:
- 天然石墨是一种面临潜在短缺的关键材料.
- 合成石墨的生产对于未来的材料需求至关重要.
- 炭石和氧化铁混合物为合成石墨提供了一条途径.
研究的目的:
- 为了研究核心外结构合成石墨的形成.
- 探索使用 antracite 和 almandine (3FeO·Al2O3·3SiO2) 的两步合成方法.
- 阐明在石墨化过程中核心外结构形成背后的机制.
主要方法:
- 采用了两步热处理过程.
- 阿尔曼丁颗粒经过热处理,形成玻璃相球体 (核心).
- 在球形表面 (外) 上涂抹了被剥离的炭石.
- 描述包括X射线衍射 (XRD),拉曼光谱,扫描电子显微镜-能量分散式X射线光谱 (SEM-EDS) 和传输电子显微镜 (TEM).
主要成果:
- 均大小的玻璃相球体成功地由阿尔曼丁形成.
- 核心外结构石墨与球形核心上石墨化的 antracite 进行了合成.
- 鉴定证实了所需石墨结构的形成.
- 提出了一种形成机制模型,涉及球体化和层次碳沉积.
结论:
- 这种两步方法有效地产生了核心外结构合成石墨.
- 提出的形成机制解释了在不同温度下发生的过程.
- 这些发现为合成石墨工业和煤炭化学提供了理论指导.
- 这项研究有助于通过合成替代品解决天然石墨稀缺问题.
更多相关视频
10:23Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
14.2K
08:18Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
Published on: March 4, 2021
1.7K
相关概念视频
02:18Network Covalent Solids
13.4K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
13.4K
02:33Phase Transitions: Sublimation and Deposition
17.1K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.1K