从生物炭中可持续生产生物质衍生石墨和石墨烯导电墨水
Haoyang You1, Janan Hui2, Yilun Zhou3
1Department of Chemistry, University of Chicago, 5735 S Ellis Ave, Chicago, IL, 60637, USA.
Small (Weinheim an der Bergstrasse, Germany)
|October 23, 2024
概括
研究人员开发了一种可持续的方法,从生物质衍生生物炭中生产高质量的石墨. 这种生物石墨为离子电池和导电墨水提供了更绿色的替代方案,超越了传统材料.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 对于高质量的石墨的需求不断增长,特别是对于离子电池的需求.
- 目前石墨生产的局限性:短缺,分布不均和环境问题.
- 对天然和合成石墨的可持续替代品的需求.
研究的目的:
- 从生物炭中合成生物质衍生石墨的高效方法.
- 评估生产的生物石墨的质量和性能.
- 评估新生产方法对环境的影响和可扩展性.
主要方法:
- 从生物炭中合成石墨.
- 使用拉曼光谱 (ID/IG比,La晶体体大小) 进行生物石墨的表征.
- 生物石墨的应用用于液相剥落到导电性油墨的石墨烯.
- 螺旋涂层薄膜的制造和导电性测试.
- 生命周期评估 (LCA) 用于环境影响比较.
主要成果:
- 生物石墨的质量与球状化天然石墨相当或优于它 (拉曼ID/IG = 0.051,La = 2.08μm).
- 生物石墨烯导电墨水实现了高导电性 (3.58 ± 0.16 × 10 4 S m -1).
- 与传统石墨生产方法相比,LCA表明化石燃料使用量和温室气体排放量减少.
结论:
- 来自生物质的生物石墨是一种可行的,高质量的,可持续的替代传统石墨.
- 这种方法使得可扩展生产的石墨烯导电性油墨具有优异的性能.
- 该工艺为石墨生产提供了环境效益和当地适应能力.
相关概念视频
01:14The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
01:21Portland Cement
Portland cement is the essential binding ingredient in concrete, made from finely ground materials including lime, iron, silica, and alumina. Lime is derived primarily from limestone, marble, marl, seashells, and clays, which also supply iron and alumina, while silica is sourced from sand, chalk, and bauxite. Contemporary manufacturing of Portland cement is a significant source of carbon dioxide emissions, prompting research into reducing its content in concrete through alternative...
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...