Extraction of Silver by Glucose
Extraction of Silver by Glucose
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DOI：
10.1002/anie.201510122
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发表时间：
2016-06-27
影响因子：
16.6
通讯作者：
Pradeep, Thalappil
中科院分区：
文献类型：
--
作者：
Baksi, Ananya;Gandi, Mounika;Pradeep, Thalappil
当金属银在简单碳水化合物如葡萄糖存在下于70 ℃的水中加热时，观察到0.7 ppm范围内的前所未有的银离子浸出，使其成为银提取的绿色方法。阴离子如碳酸根和磷酸根的存在有利于萃取。研究证实了银释放的两步机制，首先在金属表面形成银离子，然后离子银与葡萄糖络合;此类络合物已通过质谱法检测到。萃取导致表面的微观粗糙化，使其具有拉曼活性，增强因子为5 × 10（8）。
Unprecedented silver ion leaching, in the range of 0.7 ppm was seen when metallic silver was heated in water at 70 degrees C in presence of simple carbohydrates, such as glucose, making it a green method of silver extraction. Extraction was facilitated by the presence of anions, such as carbonate and phosphate. Studies confirm a two-step mechanism of silver release, first forming silver ions at the metal surface and later complexation of ionic silver with glucose; such complexes have been detected by mass spectrometry. Extraction leads to microscopic roughening of the surface making it Raman active with an enhancement factor of 5 x 10(8).