Rajesh Rajendiran, Sujanthi E, Senthil Kumar S, Venkatesan Rengarajan
Department of Chemistry, Pondicherry University, Puducherry-605014, India.
Phys Chem Chem Phys. 2015 May 7;17(17):11329-40. doi: 10.1039/c5cp00682a.
Herein we report the covalent grafting of chitosan on graphene oxide (GO) followed by a simple approach for anchoring silver (AgNPs) and gold (AuNPs) nanoparticles onto a chitosan grafted graphene oxide surface by a NaBH4 reduction method. Catalytic activity of prepared heterogeneous GO grafted chitosan stabilized silver and gold nanocatalysts (GO-Chit-Ag/AuNPs) was explored for the reduction of aromatic nitroarenes and degradation of hazardous azo dyes in the presence of NaBH4. Both catalysts were found to exhibit excellent catalytic activity towards the reduction of aromatic nitroarenes and azo dyes degradation. Furthermore, the nanocatalysts were found to be selective towards the reduction of nitro groups in halonitroarenes without any dehalogenation under mild conditions.
在此，我们报道了壳聚糖在氧化石墨烯（GO）上的共价接枝，随后通过一种简单的方法，采用硼氢化钠还原法将银（AgNPs）和金（AuNPs）纳米颗粒锚定在壳聚糖接枝的氧化石墨烯表面。研究了制备的非均相GO接枝壳聚糖稳定的银和金纳米催化剂（GO-Chit-Ag/AuNPs）在硼氢化钠存在下对芳香族硝基芳烃的还原以及对有害偶氮染料的降解的催化活性。发现这两种催化剂对芳香族硝基芳烃的还原和偶氮染料的降解均表现出优异的催化活性。此外，发现该纳米催化剂在温和条件下对卤代硝基芳烃中的硝基还原具有选择性，且无任何脱卤反应。
