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《自然科学进展(英文版)》2020,30(3):312-320
There are still serious barriers from laboratory exploration to large-scale production of commercializing highquality graphene, especially by environmental-friendly methods. In this study, a simple and efficient electrochemical method for the preparation of high-quality water-dispersible graphene has been developed using molybdate aqueous solutions as the electrolyte. The exfoliation of graphite paper could be achieved in the electrolyte with a high yield of a few layers graphene(1–5 layers, 76%) and uniform lateral size(1–6 μm, 90%).The as-obtained few layers graphene well dispersed in aqueous solution with a solubility of ~4 mg mL~(-1) and stability for at least 2 months. It provides a new green method to prepare high-quality graphene. The as-prepared water-dispersible graphene films exhibit significant electrothermal performance, with a steady-state temperature of 147 °C under voltage of 10 V and a maximum heating rate achieved of 11.8 °C s~(-1). 相似文献
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石墨相氮化碳(g-C3N4)具有较好的物理化学稳定性,合适的能带结构,良好的可见光吸收性能,因而在光催化领域得到了广泛关注。作为异相催化剂,高比表面积可以提供较多的反应位点,增加反应物的接触,改善传质,从而促进催化性能的提升。本文综述了高比表面积g-C3N4的合成方法,介绍了两种增加g-C3N4比表面积的途径:(1)模板法制备多孔g-C3N4;(2)剥离法制备薄层g-C3N4纳米片。本文对高比面积g-C3N4的光催化应用也做了相应的介绍,并对g-C3N4的发展前景做了展望。 相似文献
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