عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TL55796
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Design and Characterization of Active Photocataylysts Based on Transition Metal Chalcogenides
نام عام مواد
[Thesis]
نام نخستين پديدآور
Tanışık, İrem
نام ساير پديدآوران
Koca, Atıf
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Marmara Universitesi (Turkey)
تاریخ نشرو بخش و غیره
2019
يادداشت کلی
متن يادداشت
68 p.
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Master's
کسي که مدرک را اعطا کرده
Marmara Universitesi (Turkey)
امتياز متن
2019
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
The use of fossil fuels causes CO2 emissions. In recent years, the tendency to use alternative energy sources has increased due to increased environmental concerns. Among the alternative energy sources, studies on hydrogen energy have accelerated. Hydrogen as an energy source is obtained both from fossil fuels or electrolysis of water. Up to today, hydrogen production has mostly been derived from fossil sources. However, since these approaches are considered as non-environmentally friendly, and clean; hydrogen energy in the energy sector has not been able to pay attention. In recent years, researches are concentrated on hydrogen production from water studies on the production of hydrogen from water by using solar energy have intensified. In the photocatalytic hydrogen production, the catalysts have an important place. CdxZn(1-x)S is one of the most preferred photocatalysts due to their controllable band cavities and their excellent resistance to corrosion. Therefore, CdxZn(1-x)S and RGO-CdxZn(1-x)S photocatalysts were synthesized using different x values in this thesis study and hydrogen activities were analysed. CdxZn(1-x)S photocatalysts with different compositions were synthesized by the thermal sulphurization technique and the these photocatalysts were decorated with reduced graphene oxide (RGO) to enhance photocatalytic activity. To determine crystal systems, lattice parameters, band spacing and surface morphologies, produced photocatalysts were characterized by X-Ray diffractometer (XRD), Ultraviole-visible (UV-VIS) spectrophotometer, scanning electron microscope (SEM) and Raman spectrophotometer. Subsequently, hydrogen efficiency of CdxZn(1-x)S and RGO-CdxZn(1-x)S composites were analysed. Structures of photocatalysts were characterized by XRD, EDS and Raman spectra. Presence of RGO in RGO-CdxZn(1-x)S has proven by these analysis. As RGO has a high electron conductivity which increases electron transfer rate, adsorption capacity and extended light absorption range, RGO-CdxZn(1-x)S photocatalysts have higher photocatalytic activity. The RGO-Cd0.7Zn0.3S photocatalyst having 2.86 eV band gap was found to be the most suitable photocatalyst for hydrogen production with 141.6 µmolh-1 hydrogen production and 19.4 % quantum efficiency. Since high crystallinity has observed from thermal sulphurization method, Cd0.7Zn0.3S photocatalyst produced by thermal sulphurization method has higher rate of hydrogen production than Cd0.7Zn0.3S photocatalysts produced by different methods.
اصطلاحهای موضوعی کنترل نشده
اصطلاح موضوعی
Alternative energy
اصطلاح موضوعی
Chemistry
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
Tanışık, İrem
نام شخص - ( مسئولیت معنوی درجه دوم )
مستند نام اشخاص تاييد نشده
Koca, Atıf
شناسه افزوده (تنالگان)
مستند نام تنالگان تاييد نشده
Marmara Universitesi (Turkey)
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
