بازدهی جریان پالسی در فرآیند پوشش‌دهی نانوذرات طلا از محلول دی‌سیانورات پتاسیم

نوع مقاله : علمی و پژوهشی

نویسندگان

دانشگاه صنعتی شریف

چکیده

مقایسه‌ی اثر دو نوع زیرلایه و افزودنی نشان داد که هنگام پوشش‌دهی پالسی نانوذرات طلا، استفاده از اکسید ایندیم- قلع (به‌جای مس) و سیس‌تئین (به‌جای یُدید پتاسیم) سبب بهبود مُرفولوژی، افزایش تعداد نانوبلورها و بازدهی جریان الکتریکی و خواص فتوکاتالیزری می‌شود. مطالعات میکروسکُپ الکترونی روبشی گسیل میدانی نشان داد که با افزایش فرکانس پالسی از 50 به 8/142 هرتز و استفاده از یُدید پتاسیم، نانوخوشه‌های طلا روی سطح مس ظاهر می‌شوند و ضخامت پوشش و بازدهی جریان افزایش می‌یابند، ولی با کاهش چگالی جریان از 10 به 5/2 میلی‌آمپر بر سانتی‌متر مربع، ضخامت پوشش و بازدهی جریان کاهش می‌یابند.

کلیدواژه‌ها


عنوان مقاله [English]

Pulse Current Efficiency in Coating Process of Gold Nanoparticles from Potassium Dicyanoaurate Solution

نویسندگان [English]

  • Parisa Vahdatkhah
  • S. khatibolaslam Sadrnezhaad
Sharif Univ of Tech
چکیده [English]

Comparison of the effects of two substrates and additives on pulse current electrodeposition of Au nanoparticles showed that using indium-tin oxide instead of Cu and cysteine instead of potassium iodide can improve morphology, current efficiency, photocatalytic effect and increase the number of nanocrystals. The examinations using the field-emission scanning-electron-microscope (FE-SEM) showed that Au nanoclusters appear on the Cu surface when pulse frequency increases from 50 to 142.8 Hz and potassium iodide additive is added, whereas both the coating thickness and the current efficiency increased with the frequency of the pulse current. As current density decreased, the deposition thickness and the cathodic current efficiency decreased from 10 to 2.5 mA/cm2.

کلیدواژه‌ها [English]

  • Gold Nanoparticles
  • Pulse Electrodeposition
  • Cysteine
  • Potassium iodide
  • Cu
  • Indium-Tin Oxide
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