有序的半孔碳与分散的或纳米颗粒用于室温吸附
Barbara Szczęśniak1, Sylwia Głowniak1, Jakub Woźniak1
1Faculty of New Technologies and Chemistry, Military University of Technology, 00-098 Warsaw, Poland.
Molecules (Basel, Switzerland)
|September 28, 2023
概括
研究人员开发了一种简单的机械化学方法,通过嵌入金属纳米颗粒来制造有序半孔碳 (OMC). 这些材料对气储存应用具有前景.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学 化学 化学
背景情况:
- 排序性半孔碳 (OMC) 是具有高表面积和可调节孔隙结构的先进材料.
- 开发功能化OMC的高效合成方法,特别是那些包含金属纳米颗粒的方法,对于各种应用至关重要.
- 桑宁为碳材料提供了可持续的前体,但它们与金属集成到有序结构中需要特定的策略.
研究的目的:
- 开发一种简单的机械化学方法,用于合成嵌入金属纳米粒子 (Ni或Pt) 的有序半孔碳 (OMC).
- 研究合成的OMC的结构特征,包括表面积,毛孔体积和中毛孔排序.
- 评估金属嵌入式OMC的储能能力.
主要方法:
- 采用单球磨粉工艺,涉及化物,金属盐 (Ni或Pt) 和块共聚物.
- 将磨砂混合物进行热处理,以获得嵌入金属的OMC.
- 使用技术来确定表面积,毛孔体积,毛孔大小分布和金属纳米颗粒分散的技术来描述所得到的材料.
- 在特定的温度和压力条件下评估储能.
主要成果:
- 成功合成了Ni或Pt嵌入的OMCs,具有高特异性表面积 (高达600 m2·g-1) 和大孔积 (高达~0.5 cm3·g-1).
- OMCs呈现出六角顺序的圆柱形半孔与狭窄的孔径分布 (平均7nm),表明有效的共聚合物辅助自组装.
- 在碳表面上实现了小尺寸Ni或Pt纳米颗粒的均分布.
- 合成的基于OMC的材料在25°C和100bar时表现出高达0.33重量%的储能.
结论:
- 一种简单的机械化学方法使得有序的半孔碳与素中的分散的金属纳米颗粒的合成成为可能.
- 该方法产生具有优良结构性质的材料,适合吸附和催化.
- 嵌入的金属纳米粒子有助于显著的储能能力,突出了实际应用的潜力.
更多相关视频
10:44Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
10.0K
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
3.6K
相关概念视频
02:50Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...