کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602142 | 1424075 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion transfer at polarised liquid-liquid interfaces modified with adsorbed silica nanoparticles
ترجمه فارسی عنوان
انتقال یون در رابطهای مایع قطبی شده با نانوذرات سیلیکا جذب شده اصلاح شده است
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The interface between two immiscible electrolyte solutions (ITIES) can act as a scaffold for the assembly of nanometer-sized objects. Here we followed the adsorption of silica nanoparticles of 12â¯nm diameter at the ITIES by AC voltammetry and their interactions with methylene blue (MB+), selected as a model ion, by cyclic voltammetry and UV-vis absorption spectroscopy. We determined the association constant, Kadsaq, of adsorption of MB+ onto silica nanoparticles to be 1.66â¯105, which indicated a strong affinity between them. This strong affinity shifted the Gibbs free energy of transfer by â8.9â¯kJâ¯molâ1. This is in contrast with the other two ions investigated (Eosin B and tetraethylammonium), which demonstrated low affinity for the silica nanoparticles. By combining the ability of silica to adsorb onto the ITIES and their affinity for MB+, we were able to accumulate MB+ at the ITIES.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 282, 20 August 2018, Pages 155-162
Journal: Electrochimica Acta - Volume 282, 20 August 2018, Pages 155-162
نویسندگان
Martha C. Collins, Marc Hébrant, Grégoire Herzog,