| 查看: 1850 | 回复: 7 | ||||||||||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||||||||||||
[交流]
Acc. Chem. Res. 最新综述 化学修饰石墨烯的机遇与挑战 已有6人参与
|
||||||||||||
|
题目：Material Processing of Chemically Modified Graphene: Some Challenges and Solutions 摘要：Graphene-based sheets show promise for a variety of potential applications, and researchers in many scientific disciplines are interested in these materials. Although researchers have developed many ways of generating single atomic layer carbon sheets, chemical exfoliation of graphite powders to graphene oxide (GO) sheets followed by deoxygenation to form chemically modified graphene (CMG) offers a promising route for bulk scale production. The materials processing, which we broadly define as the physical and chemical means to tailor a material’s chemical and microstructures, enables us to control the properties in bulk CMG materials. For example, by processing CMG sheets in different solvents, we can make thin films, blend CMG sheets with other materials, and modify them by chemical reactions. Materials processing methods also allow us to control the interactions between CMG sheets for the assembly of large scale two- or three-dimensional structures with desirable microstructures. This Account highlights a few problems associated with large scale production and processing of GO and CMG. First, we briefly discuss the potential fire risk of GO and CMG when alkaline salt byproducts are not completely removed. These impurities can catalyze carbon combustion. We introduce an improved purification procedure that effectively removes the byproducts and speeds up the production. Next, we address the challenges of imaging GO and CMG sheets on common substrates such as glass and plastics using standard microscopy methods. We have introduced a new technique fluorescence quenching microscopy (FQM), which allows us to observe graphene-based sheets with both high throughput and high contrast on arbitrary substrates and even in solution. Then we focus on how to prevent aggregation in CMG. Aggregation greatly reduces the material processability and accessible surface area, which degrades the material properties. We introduce two strategies to reduce aggregation by (i) reducing the lateral dimension of the sheets to nanometer range to enhance their colloidal stability and (ii) crumpling the sheets into paper ball-like, fractal-dimensional particles to make them aggregation-resistant in both solvents and solid state, even after mechanical compression. Solutions to these material processing challenges can pave the way for further research and development. We hope that the tools and strategies presented in this Account can facilitate the processing and property control of this promising material.  ar-2012-00180n_0014.gif |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : ar300180n.pdf
2013-02-25 08:54:50, 1.24 M
» 收录本帖的淘帖专辑推荐
 先进材料 | 科研资料 | 文献推荐 | 碳材料负载催化 |
| 二维材料最新进展 | 石墨烯 | Graphene | 如月之恒-石墨烯 |
| 石墨烯透明导电薄膜 |
» 猜你喜欢
无机化学论文润色/翻译怎么收费?
已经有128人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐，对您同样有帮助:
- Acc Chem Res 综述 : 石墨烯纳米复合材料在太阳能转换，储存，传感方面的前景
已经有131人回复
- Acc. Chem. Res.最新综述：你和石墨烯要去的地方！
已经有50人回复
- Acc. Chem. Res.最新综述：Graphene: Powder, Flakes, Ribbons, and Sheets
已经有127人回复
- Acc. Chem. Res.最新综述：碳基催化剂---氧化石墨烯及其衍生物
已经有230人回复
- Acc. Chem. Res.最新综述：基于大面积高质量石墨烯薄膜的杂化功能系统
已经有151人回复
- Acc. Chem. Res.最新综述：用于太阳能转化、存储、传感的石墨烯基复合物的设计与展望
已经有214人回复
- Acc. Chem. Res.最新文章：CVD法可控生长寡层石墨烯用于电子器件
已经有79人回复
- Acc. Chem. Res. 新综述--量子点的细胞毒性及减小毒性的方法
已经有119人回复
  |
4楼2013-02-25 15:30:21
0.8
| 顶一下，感谢分享！ |
2楼2013-02-25 09:18:50
|
|
3楼2013-02-25 14:30:24
28