Utilization of abundantly available biomass to develop advanced materials and products has become an utmost priority these days. Herein, we developed a sustainable route for the synthesis of Ni nanoparticles loaded on N-doped carbon nanosheets using underutilized sugarcane bagasse, urea and NiCl2∙6H2O as the carbon, nitrogen and Ni source. The synthesized catalyst was characterized by different analytical techniques; FESEM, elemental mapping and HRTEM analysis revealed the formation of flower-like carbon nanosheets containing uniformly distributed nickel nanoparticles with average particle size of 2.4-10 nm. The synthesized nanocatalyst was used for the one-pot reductive amination of different bio-derived aldehydes with the nitroarenes at 100 °C for 4 h. The complete conversion of the variety of Nitroarenes with the formation of imines and Benzimidazole products was obtained under optimized reaction conditions. The catalyst was recyclable up to five times with negligible loss in selectivity towards imines.

中文翻译：

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从蔗渣中合成花状Ni @ N掺杂碳纳米片的可持续路线及其对生物衍生醛还原硝基芳烃的催化活性

如今，利用丰富的生物质来开发先进的材料和产品已成为当务之急。在本文中，我们开发了一种可持续的路线，可以利用未充分利用的甘蔗渣，尿素和NiCl2∙6H2O作为碳，氮和镍源，合成负载在N掺杂碳纳米片上的Ni纳米颗粒。用不同的分析技术对合成的催化剂进行了表征。FESEM，元素图谱和HRTEM分析表明形成了花状碳纳米片，其中包含均匀分布的镍纳米粒子，平均粒径为2.4-10 nm。合成的纳米催化剂用于在100°C下与硝基芳烃进行一锅还原不同生物衍生醛的胺化反应。在优化的反应条件下，获得了各种亚硝基芳烃的完全转化并形成了亚胺和苯并咪唑产物。该催化剂可循环使用多达五次，而对亚胺的选择性损失可忽略不计。