Pristine graphene: functionalization, fabrication, and nanocomposite materials
Pristine graphene: functionalization, fabrication, and nanocomposite materials
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DOI：
10.1088/1742-6596/1143/1/012012
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发表时间：
2018-12
期刊：
影响因子：
--
通讯作者：
Mingdi Yan
中科院分区：
文献类型：
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作者：
Mingdi Yan
石墨烯具有广泛的独特性质，包括高载流子迁移率、光学透明性以及优异的导电性和导热性。对石墨烯的兴趣在很大程度上是由于它有可能彻底改变许多重要的技术领域，包括材料科学，生物医学科学和能源。尽管潜力很大，但仍然存在重大挑战。这些缺点包括溶解性差、固有零带隙能、低反应性和大量可获得的良好定义的原始石墨烯，这些都阻碍了石墨烯基功能器件的快速发展。这些挑战中的许多都可以通过材料的化学功能化来解决。共价官能化可以增强石墨烯的性能，包括打开其带隙、调节电导率、改善溶解性以及增强石墨烯基复合材料的性能。本文主要讨论了石墨烯的化学功能化、石墨烯-纳米粒子复合材料的制备以及三维石墨烯（3DG）-TiO 2纳米复合光催化剂的制备。在光催化CO2还原反应中，3DG-TiO 2纳米复合材料表现出优异的活性，约为TiO 2纳米颗粒的11倍。
Graphene has a wide range of unique properties including high carrier mobility, optical transparency, and exceptional electrical and thermal conductivity. The interest in graphene has been largely fueled by its potential to revolutionize a number of technologically important areas including materials science, biomedical science, and energy. Despite its high potentials, major challenges still remain. These include poor solubility, intrinsic zero band gap energy, low reactivity and the availability of well-defined pristine graphene in large quantity, which have hampered the rapid development of graphene-based functional devices. Many of these challenges can be potentially addressed through chemical functionalization of the material. Covalent functionalization can enhance graphene’s properties including opening its band gap, tuning conductivity, improving solubility, and enhancing the properties of graphene-based composite materials. This paper discusses our work on the chemical functionalization of pristine graphene, and synthesis of graphene-nanoparticle composite materials and three-dimensional graphene (3DG)-TiO2 nanocomposite photocatalyst. In photocatalytic CO2 reduction, the 3DG-TiO2 nanocomposite demonstrated excellent activity, about 11 times higher than TiO2 nanoparticles.