AbstractCellulose hydrogels are “green” reductants and supports for Au nanoparticles (Au NPs). Herein, we report a facile method for synthesizing Au NPs based on alkali/urea regenerated cellulose hydrogels. By controlling the precursor concentration and the reaction temperature, the size of the Au NPs can be adjusted. We successfully demonstrate that the Au NP/cellulose hydrogels can be used as efficient heterogeneous catalysts in the reduction of 4-nitrophenol (4-NP). Au NPs with smaller sizes have higher catalytic activity. The highest turnover frequency (TOF) of the Au NPs/cellulose hydrogels is 19.4 h−1. The Au NP/cellulose hydrogels can be easily isolated after the catalytic reaction.We report a facile method for synthesizing Au NPs based on alkali/urea regenerated cellulose hydrogels. By controlling the precursor concentration and the reaction temperature, the size of the Au NPs can be adjusted. The Au NP/cellulose hydrogels can be used as efficient heterogeneous catalysts in the reduction of 4-nitrophenol.

中文翻译：

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基于纤维素水凝胶的易分离金纳米粒子催化剂的原位合成

摘要纤维素水凝胶是“绿色”还原剂和金纳米粒子 (Au NPs) 的载体。在此，我们报告了一种基于碱/尿素再生纤维素水凝胶合成 Au NPs 的简便方法。通过控制前驱体浓度和反应温度，可以调节 Au NPs 的大小。我们成功地证明了 Au NP/纤维素水凝胶可用作还原 4-硝基苯酚 (4-NP) 的有效多相催化剂。较小尺寸的 Au NPs 具有较高的催化活性。Au NPs/纤维素水凝胶的最高周转频率 (TOF) 为 19.4 h-1。Au NP/纤维素水凝胶在催化反应后很容易分离。我们报道了一种基于碱/尿素再生纤维素水凝胶合成Au NPs的简便方法。通过控制前驱体浓度和反应温度，可以调节 Au NPs 的大小。Au NP/纤维素水凝胶可用作还原 4-硝基苯酚的高效多相催化剂。