Large scale production of high aspect ratio graphite nanoplatelets with tunable oxygen functionality
Large scale production of high aspect ratio graphite nanoplatelets with tunable oxygen functionality
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DOI：
10.1039/c1jm00039j
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发表时间：
2011-01-01
影响因子：
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通讯作者：
Stadler, Urs
中科院分区：
文献类型：
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作者：
Choi, Sung Yeun;Mamak, Marc;Stadler, Urs
具有可调氧功能的高宽高比石墨纳米片采用两步可扩展工艺制备，包括热等离子体处理膨胀和超声波处理剥离。该工艺的结果是高产量的石墨纳米片，其平均粒径分布范围从单层石墨烯到10纳米厚度，长度/宽度为1到30 μ m，碳氧比（C/O）可调在50到200之间，无需任何特殊的分离或分离技术，如沉淀或离心。这是第一次证明，中间水平的氧功能化提高了剥离膨胀石墨的能力，而不会对导电性产生不利影响。
High aspect ratio graphite nanoplatelets with tunable oxygen functionality are prepared using a two-step scalable process consisting of expansion by thermal plasma processing followed by exfoliation with ultrasonic processing. The result of this process is graphite nanoplatelets in high yield with an average particle size distribution ranging from monolayer graphene up to 10 nm in thickness, 1 to 30 mu m in length/width, and a tunable carbon to oxygen (C/O) ratio from 50 to 200 without requiring any special separation or isolation techniques such as sedimentation or centrifugation. It has been demonstrated for the first time that an intermediate level of oxygen functionalization improves the ability to exfoliate expanded graphite without having a detrimental effect on electrical conductivity.