The templated synthesis of noble metal nanoparticles using biomass, such as proteins and polysaccharides, has generated great interest in recent years. In this work, we report on denatured proteins as a novel template for the preparation of water-soluble metal nanoparticles with excellent stability even after high speed centrifugation or storage at room temperature for one year. Different noble metal nanoparticles including spherical gold and platinum nanoparticles as well as gold nanoflowers are obtained using sodium borohydride or ascorbic acid as the reducing agent. The particle size can be controlled by the concentration of the template. These metal nanoparticles are further used as catalysts for the hydrogenation reaction of p-nitrophenol to p-aminophenol. Especially, spherical gold nanoparticles with an average size of 2 nm show remarkable catalytic performance with a rate constant of 1.026 × 10− 2 L s− 1 mg− 1. These metal nanoparticles with tunable size and shape have great potential for various applications such as catalysis, energy, sensing, and biomedicine.

中文翻译：

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变性蛋白质作为合成模板的新模板，用于催化应用的定义明确，超稳定和水溶性金属纳米结构

近年来，使用生物质（例如蛋白质和多糖）进行模板化的贵金属纳米颗粒的合成引起了人们的极大兴趣。在这项工作中，我们报道了变性蛋白作为制备水溶性金属纳米颗粒的新型模板，即使在高速离心或在室温下保存一年后，该纳米颗粒也具有出色的稳定性。使用硼氢化钠或抗坏血酸作为还原剂，可获得包括球形金和铂纳米粒子以及金纳米花的不同贵金属纳米粒子。粒度可以通过模板的浓度来控制。这些金属纳米颗粒还用作对硝基苯酚加氢合成对氨基苯酚的催化剂。特别，