Chen Chunhong, Li Xuefeng, Deng Jiang, Wang Zhe, Wang Yong
Advanced Materials and Catalysis Group, Institute of Catalysis, Zhejiang University, Hangzhou, 310028, P. R. China.
ChemSusChem. 2018 Aug 9;11(15):2540-2546. doi: 10.1002/cssc.201801215. Epub 2018 Jul 23.
The realization of asymmetric hollow carbonaceous nanostructures remains a great challenge, especially when biomass is chosen as the carbon resource through hydrothermal carbonization (HTC). Herein, a simple and straightforward solvent-induced buckling strategy is demonstrated for the synthesis of asymmetric spherical and bowl-like carbonaceous nanomaterials. The formation of the bowl-like morphology was attributed to the buckling of the spherical shells induced by the dissolution of the oligomers. The bowl-like particles prepared through this solvent-driven approach demonstrated a well-controlled morphology and a uniform particle size of approximately 360 nm. The obtained nanospheres and nanobowls were loaded with CoS nanoparticles to act as heterogeneous catalysts for the selective hydrogenation of aromatic nitro compounds. As expected, the CoS /nanobowls catalyst showed good tolerance to a wide scope of reducible groups and afforded both high activity and selectivity in almost all the tested substrates.
实现不对称空心碳质纳米结构仍然是一个巨大的挑战，尤其是当通过水热碳化（HTC）选择生物质作为碳源时。在此，展示了一种简单直接的溶剂诱导屈曲策略，用于合成不对称球形和碗状碳质纳米材料。碗状形态的形成归因于低聚物溶解引起的球壳屈曲。通过这种溶剂驱动方法制备的碗状颗粒表现出形态可控且粒径均匀，约为360 nm。将所得的纳米球和纳米碗负载CoS纳米颗粒，用作芳香族硝基化合物选择性氢化的多相催化剂。正如预期的那样，CoS/纳米碗催化剂对广泛的可还原基团具有良好的耐受性，并且在几乎所有测试的底物中都具有高活性和选择性。
