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Synthesis of Au Nanoparticles with Benzoic Acid as Reductant and Surface Stabilizer Promoted Solely by UV Light
Langmuir ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1021/acs.langmuir.7b03192 Yasuhiro Shiraishi 1, 2 , Haruki Tanaka 1 , Hirokatsu Sakamoto 1 , Naoto Hayashi 1 , Yusuke Kofuji 1 , Satoshi Ichikawa 3 , Takayuki Hirai 1
Langmuir ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1021/acs.langmuir.7b03192 Yasuhiro Shiraishi 1, 2 , Haruki Tanaka 1 , Hirokatsu Sakamoto 1 , Naoto Hayashi 1 , Yusuke Kofuji 1 , Satoshi Ichikawa 3 , Takayuki Hirai 1
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Photoreductive synthesis of colloidal gold nanoparticles (AuNPs) from Au3+ is one important process for nanoprocessing. Several methods have been proposed; however, there is no report of a method capable of producing AuNPs with inexpensive reagents acting as both reductant and surface stabilizer, promoted solely under photoirradiation. We found that UV irradiation of water with Au3+ and benzoic acid successfully produces monodispersed AuNPs, where thermal reduction does not occur in the dark condition even at elevated temperatures. Photoexcitation of a benzoate–Au3+ complex reduces Au3+ while oxidizing benzoic acid. The benzoic acid molecules are adsorbed on the AuNPs and act as surface stabilizers. Change in light intensity and benzoic acid amount successfully creates AuNPs with controllable sizes. The obtained AuNPs can easily be redispersed in an organic solvent or loaded onto a solid support by simple treatments.
中文翻译：
紫外光单独促进以苯甲酸为还原剂和表面稳定剂的金纳米粒子的合成
由Au 3+光还原合成胶体金纳米颗粒（AuNPs）是纳米加工的重要过程之一。已经提出了几种方法。然而，没有报道能够通过廉价的试剂同时充当还原剂和表面稳定剂来生产AuNP的方法，该试剂仅在光照射下被促进。我们发现，用Au 3+和苯甲酸对水进行UV辐照成功地产生了单分散的AuNPs，即使在高温下，在黑暗条件下也不会发生热还原。光激发苯甲酸酯-Au 3+络合物可降低Au 3+同时氧化苯甲酸。苯甲酸分子吸附在AuNPs上并充当表面稳定剂。光强度和苯甲酸含量的变化成功地产生了尺寸可控的AuNP。所获得的AuNPs可以通过简单的处理轻松地重新分散在有机溶剂中或加载到固体支持物上。
更新日期：2017-11-21
中文翻译：
紫外光单独促进以苯甲酸为还原剂和表面稳定剂的金纳米粒子的合成
由Au 3+光还原合成胶体金纳米颗粒（AuNPs）是纳米加工的重要过程之一。已经提出了几种方法。然而，没有报道能够通过廉价的试剂同时充当还原剂和表面稳定剂来生产AuNP的方法，该试剂仅在光照射下被促进。我们发现，用Au 3+和苯甲酸对水进行UV辐照成功地产生了单分散的AuNPs，即使在高温下，在黑暗条件下也不会发生热还原。光激发苯甲酸酯-Au 3+络合物可降低Au 3+同时氧化苯甲酸。苯甲酸分子吸附在AuNPs上并充当表面稳定剂。光强度和苯甲酸含量的变化成功地产生了尺寸可控的AuNP。所获得的AuNPs可以通过简单的处理轻松地重新分散在有机溶剂中或加载到固体支持物上。
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