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Ostwald ripening and control of Ag ion reduction degree by ammonium hydroxide in alcohol reduction process

机译：醇还原过程中奥斯特瓦尔德熟化和氢氧化铵控制Ag离子还原度

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摘要

Highly concentrated silver colloidal solutions were synthesized via alcohol reduction process by adding ammonium hydroxide (NH4OH). NH4OH played a role of enhancing the conversion of silver ions to silver atoms by accelerating oxidation reaction of alcohol. Amount of converted Ag-0 affected particle size, size distribution, and particle concentration, and it was explained in the aspect of nucleation and growth steps. Also, in the middle of the reaction process, Ostwald ripening was observed in TEM image which has hardly been reported in metallic particles. Colloidal characteristics were analyzed by UV-vis spectrophotometer and TEM, and the degree of Ag+ reduction was determined by ISE. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：通过添加氢氧化铵（NH4OH），通过醇还原法合成高浓度的银胶体溶液。 NH 4 OH通过加速醇的氧化反应起促进银离子向银原子的转化的作用。转化的Ag-0的量影响粒径，粒径分布和粒径，并在成核和生长步骤方面进行了解释。另外，在反应过程的中间，在TEM图像中观察到了奥斯特瓦尔德熟化，这在金属颗粒中几乎没有报道。用紫外可见分光光度计和TEM分析胶体特性，并用ISE测定Ag +的还原度。 （C）2014大韩工业化学工程学会。由Elsevier B.V.发布。保留所有权利。

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