Graphene from amorphous titanium carbide by chlorination under 200 °C and atmospheric pressures.

Graphene from amorphous titanium carbide by chlorination under 200 °C and atmospheric pressures.
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无定形碳化钛在 200 摄氏度和大气压下氯化得到石墨烯

DOI:
10.1038/srep05494
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发表时间:
2014-06-30
期刊:
影响因子:
4.6
通讯作者:
Mu S
Mu S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Peng T;Kou Z;Wu H;Mu S

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通过SiC分解合成石墨烯为石墨烯的大规模生产开辟了一条有前途的路线。然而,对几乎完美有序的晶体SiC的极高要求和苛刻的工艺条件如高温(>1200°C)和超高真空是阻碍其广泛用于通过SiC分解合成石墨烯的两个重大挑战。在这里,我们表明,容易获得的碳化物前体,非晶TiC(a-Ti 1-xCx),可以通过氯化方法在非常低的温度(200°C)和环境压力下转化为具有可调层的石墨烯纳米片(GNS)。此外,独立式GNS可以通过从所得颗粒的表面剥离GNS来实现。因此,我们的策略,a-Ti 1-xCx直接转化为石墨烯,是简单的,预计很容易扩大规模。
The synthesis of graphene via decomposition of SiC has opened a promising route for large-scale production of graphene. However, extremely high requirements for almost perfectly ordered crystal SiC and harsh process conditions such as high temperatures (>1200°C) and ultra-high vacuum are two significant challenges hindering its wide use to synthesize graphene by decomposition of SiC. Here, we show that the readily available precursor of carbides, amorphous TiC (a-Ti1-xCx), can be transformed into graphene nanosheets (GNS) with tunable layers by chlorination method at very low temperatures (200°C) and ambient pressures. Moreover, freestanding GNS can be achieved by stripping off GNS from the surface of resulting particles. Therefore, our strategy, the direct transformation of a-Ti1-xCx into graphene, is simple and expected to be easily scaled up.
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