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Gravimetric analysis of the autocatalytic growth of copper microparticles in aqueous solution

机译:水溶液中铜微粒的自催化生长的重量分析

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The growth kinetics of copper microparticles was analysed by using the gravimetric method. The copper microparticles were synthesized in aqueous solution containing cupric ion and HCHO under various conditions (temperature, additive) and the total mass was monitored during the synthesis. The relation between the total mass and time was formularized using heterogeneous and pseudo-first order reaction kinetics of the autocatalytic surface growth of copper with a modification of the Finke-Watzky kinetic model. Fitting of theoretical curves to the experimental results with various temperatures provided the rate constants of the surface growth, and the reaction activation energy was found from the Arrhenius plot to be 105.4 kJ mol(-1). The obtained value was validated by comparing it with one from copper film growth. Its change was observed with the addition of 2,2 '-dipyridyl during synthesis.
机译:通过使用重量法分析铜微粒的生长动力学。 在含铜离子和Hcho的水溶液中合成铜微粒,在各种条件下(温度,添加剂),并且在合成期间监测总质量。 使用铜的自均匀性表面生长的异质和伪第一阶反应动力学与铜的自均匀性表面生长的变形例进行了多种质量和时间之间的关系,其改变了Finke-Watzky动力学模型。 将理论曲线与各种温度的实验结果拟合提供了表面生长的速率常数,并且从Arrhenius图中发现了反应活化能量为105.4kJ摩尔(-1)。 通过将其与来自铜膜生长的一个人进行比较来验证所得值。 通过在合成期间添加2,2'-己二维基,观察到其变化。

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    《RSC Advances》 |2019年第65期|共6页
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  • 正文语种 eng
  • 中图分类 化学;
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