Growing three-dimensional biomorphic graphene powders using naturally abundant diatomite templates towards high solution processability.
Growing three-dimensional biomorphic graphene powders using naturally abundant diatomite templates towards high solution processability.
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使用天然丰富的硅藻土模板生长三维生物形态石墨烯粉末，以实现高溶液加工性
DOI：
10.1038/ncomms13440
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发表时间：
2016-11-07
影响因子：
16.6
通讯作者：
Liu Z
中科院分区：
文献类型：
--
作者：
Chen K;Li C;Shi L;Gao T;Song X;Bachmatiuk A;Zou Z;Deng B;Ji Q;Ma D;Peng H;Du Z;Rümmeli MH;Zhang Y;Liu Z
低成本、高质量的石墨烯的大规模生产是其广泛实际应用的基石。我们在此提出了一种自限生长方法，用于通过小甲烷流化学气相沉积工艺在天然丰富和工业上广泛使用的生物二氧化硅（biosilica）基底上生产石墨烯粉末。与化学剥离的石墨烯不同，由此产生的生物形态石墨烯高度结晶，具有原子层厚度可控性、结构可设计性和较少的非碳杂质。特别地，单独的石墨烯微架构保留了原始硅藻硅藻壳的三维自然弯曲表面形态，有效地克服了层间堆叠，因此在制造可溶液加工的电极时具有优异的分散性能。由石墨烯粉末制成的石墨烯薄膜，与棒涂或喷墨和卷对卷印刷技术兼容，表现出比先前报道的基于溶液的对应物高得多的电导率（在80%透射率下为110，700 S m− 1）。本工作为低成本大规模生产各种粉末状二维材料提供了一条切实可行的途径。
Mass production of high-quality graphene with low cost is the footstone for its widespread practical applications. We present herein a self-limited growth approach for producing graphene powders by a small-methane-flow chemical vapour deposition process on naturally abundant and industrially widely used diatomite (biosilica) substrates. Distinct from the chemically exfoliated graphene, thus-produced biomorphic graphene is highly crystallized with atomic layer-thickness controllability, structural designability and less noncarbon impurities. In particular, the individual graphene microarchitectures preserve a three-dimensional naturally curved surface morphology of original diatom frustules, effectively overcoming the interlayer stacking and hence giving excellent dispersion performance in fabricating solution-processible electrodes. The graphene films derived from as-made graphene powders, compatible with either rod-coating, or inkjet and roll-to-roll printing techniques, exhibit much higher electrical conductivity (∼110,700 S m−1at 80% transmittance) than previously reported solution-based counterparts. This work thus puts forward a practical route for low-cost mass production of various powdery two-dimensional materials.