نوع مقاله : مقاله کامل پژوهشی
نویسنده
دانشکده علوم پایه مهندسی، دانشگاه صنعتی سهند، تبریز، ایران
چکیده
در این مطالعه، نیترید کربن گرافیتی (g-C3N4) از چگالش گرمایی ملامین در دو دمای 450 و 550 درجه سانتیگراد ساخته شد. همچنین، الکترود نانوساختارهای متخلخل دی اکسید تیتانیوم (TiO2 NP) به عنوان بستر برای لایه نشانی g-C3N4 با روش آندیزاسیون بر روی فویل تیتانیوم (Ti) ساخته شد و سپس برای بهبود رسانندگی الکتریکی به روش الکتروشیمیایی احیا گردید. لایه نیترید کربن گرافیتی به روش الکتروفورتیک بر روی الکترود نانوساختارهای متخلخل احیا شده (Re-TiO2 NP/Ti) لایه نشانی گردید و الکترود نانوساختارهای متخلخل دی اکسید تیتانیوم احیا شده/نیترید کربن گرافیتی (g-C3N4/Re-TiO2 NP/Ti) حاصل به عنوان الکترود ابرخازنی مورد استفاده قرار گرفت. مقایسهی خواص ابرخازنی الکترودهای (g-C3N4/Re-TiO2 NP/Ti) نشان داد که بازده الکتروشیمیایی و ظرفیت ویژه الکترود g-C3N4(450)/Re-TiO2 NP/Ti نسبت به الکترودg-C3N4(550)/Re-TiO2 NP/Ti بیشتر است که این پدیده، به دلیل مقادیر بالای نیتروژن و در نتیجه، افزایش سایتهای فعال، افزایش انتقال بار و آبدوستی در الکترود g-C3N4(450)/Re-TiO2 NP/Ti میباشد.
کلیدواژه‌ها
عنوان مقاله [English]
Supercapacitive properties of graphitic-carbon nitride deposited on reduced titanium dioxide porous nanostructured substrate
نویسنده [English]
- Samira Yousefzadeh
Department of Physics, Faculty of Science, Sahand University of Technology, Tabriz, Iran
چکیده [English]
In this study, graphitic carbon nitride (g-C3N4) was made by thermal condensation of melamine at 450 and 550 °C. Moreover, the TiO2 porous nanostructured electrode was fabricated as a substrate for the g-C3N4 deposition by anodization method on a titanium foil (Ti) and then, reduced by electrochemical method to improve electrical conductivity (Re-TiO2 NP). The graphite carbon nitride layers were deposited on the porous nanostructured electrode (Re-TiO2 NP/Ti) by electrophoretic technique and the g-C3N4/Re-TiO2 NP/Ti electrodes were used as supercapacitor electrode. Comparison of the supercapacitive properties of the g-C3N4/Re-TiO2 NP/Ti electrodes showed that the electrochemical efficiency and specific capacitance of the g-C3N4 (450)/Re-TiO2 NP/Ti electrode is higher than the g-C3N4 (550)/Re-TiO2 NP/Ti electrode due to the increased active sites and charge transfer and the enhanced hydrophilicity as result of its high nitrogen content.
کلیدواژه‌ها [English]
- Supercapacitor
- Reduced TiO2 porous nanostructured electrode
- graphitic-Carbon Nitride
- Specific capacitance
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