Synthesis of high performance Ni3C-Ni decorated thermally expanded reduced graphene oxide (TErGO/Ni3C-Ni) nanocomposite: A stable catalyst for reduction of Cr(VI) and organic dyes.
Synthesis of high performance Ni3C-Ni decorated thermally expanded reduced graphene oxide (TErGO/Ni3C-Ni) nanocomposite: A stable catalyst for reduction of Cr(VI) and organic dyes.
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DOI：
10.1016/j.jhazmat.2018.12.015
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发表时间：
2019-03
影响因子：
13.6
通讯作者：
M. Y. Akram;M. U. Hameed;N. Akhtar;Safdar Ali;Inamullah Maitlo;Xiaoqi Zhu;Nie Jun
中科院分区：
文献类型：
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作者：
M. Y. Akram;M. U. Hameed;N. Akhtar;Safdar Ali;Inamullah Maitlo;Xiaoqi Zhu;Nie Jun
采用一种简单、环保的方法成功制备了一种高性能的Ni3C-Ni修饰的热膨胀还原氧化石墨烯（TErGO）纳米复合材料（TErGO/Ni3C-Ni）。通过各种物理化学表征研究了TErGO/Ni3C-Ni纳米复合材料的形貌、织构特征、表面组成和稳定性，揭示了结晶金属纳米颗粒在TErGO基体中的均匀分散。该复合材料表现出大的表面积和孔体积，分别为121 m2 g − 1和0.791 cm3 g − 1。TErGO/Ni3C-Ni催化剂的催化性能超过了目前文献报道的大多数金属基催化剂。Cr（Ⅵ）还原为Cr（Ⅲ）在1 min内实现，具有2.74 min − 1的优异速率常数和0.29 mg Cr（VI）min − 1的显著更高的比去除速率（SRR）。 mg − 1的TErGO/Ni3C-Ni。NaBH_4还原有机染料的反应在30 s内完成。此外，所制备的纳米催化剂具有良好的稳定性和可回收性，易于磁性分离。
A high performance thermally expanded reduced graphene oxide (TErGO) nanocomposite decorated with Ni3C-Ni nanoparticles (TErGO/Ni3C-Ni) has been successfully synthesized by using a facile and eco-friendly approach. The morphology, textural features, surface composition and stability of TErGO/Ni3C-Ni nanocomposite are investigated by various physicochemical characterizations which revealed the uniform dispersion of crystalline metal nanoparticles inside TErGO matrix. The composite has been exhibited a large surface area and pore volume of 121 m2g−1and 0.791 cm3g−1, respectively. The TErGO/Ni3C-Ni exhibited remarkable catalytic performance surpassing most metal-based catalysts with various kind of support matrices reported in recent literature. The reduction of Cr(Ⅵ) to Cr(Ⅲ) was achieved within 1 min with an excellent rate constant of 2.74 min−1and phenomenally higher specific removal rate (SRR) of 0.29 mg Cr(VI) min−1. mg−1of TErGO/Ni3C-Ni. While it also proved an excellent reducing catalyst for organic dyesviaNaBH4with full reduction achieved within 30 s. Moreover, as prepared nanocatalyst possesses excellent stability and recyclability with easy magnetic separation.