Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı 2

Synthesis and Characterization of Pt-Metal Sulfide/CdS Catalysts for Photocatalytic Water Splitting
Today, environmental pollution is the main problem that affecting humankind. Water is the source of life and essential requirement for present and future generations. With the developing technology, water used in the manufacturing processes in chemical industry is polluted. Photocatalysis, using sunlight as an energy source, the removal of impurities in the water and production hydrogen from water is of increasing importance.
In recent years, semiconductors having beneficial optical, electronical and chemical properties are utilised as industrial photocatalysts. A semiconductor material, such as, CdS with absorbance in visible light and band well positioned for the water splitting, is promising primary material both for the hydrogen production with solar energy and in the removal of impurities in water. TiO₂ is a semiconductor material that is active only in the UV light region but it can be effective in the visible region after doping. However, CdS is known to have about stability problems. Thus, to synthesize CdS catalysts showing high and stable activity is the goal of this thesis.
In this thesis, CdS catalysts, sensitive to the visible region of the solar spectrum, are synthesized using hydrothermal method, doped with Pt, and also synthesized as binary metal sulfides (MS-CdS). (MS = PdS, NiS, ZnS)
The synthesized photocatalysts were characterized by XRD, UV-Vis reflectance and Photoluminescence (PL) techniques. Hydrogen production rate by photocatalytic water splitting reaction was followed with GC. Photocatalytic activity of the catalysts is also determined by following the removal of methylene blue removal.
  

GEMİCİ Ayşegül

Danışman : Prof. Dr. Ş. İsmail Kırbaşlar

Anabilim Dalı : Kimya Mühendisliği

Programı : Temel İşlemler ve Termodinamik

Mezuniyet Yılı : 2014

Tez Savunma Jürisi : Prof. Dr. Ş. İsmail KIRBAŞLAR

Prof Dr. Umur DRAMUR

Prof. Dr. Mehmet BİLGİN

Prof. Dr. İsmail İNCİ

Doç. Dr. Hasan USLU