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OK, ALAADDİN CEM

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ALAADDİN CEM

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Author: OK, ALAADDİN CEM × Subject: Enerji Mühendisliği ve Güç Teknolojisi ×

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    Synthesis of SnS2 photocatalyst for photocatalytic hydrogen production
    (2022-06-30) OK, ALAADDİN CEM; SARIOĞLU, CEVAT; Ok A. C., Sarıoğlu C.
    Hydrogen could be generated from both renewable and non-renewable sources of energy. Usingnonrenewable energy sources to produce hydrogen will result in greenhouse CO2 gas emissions andcause global warming. Photocatalytic systems for generating hydrogen from solar energy have a greatdeal of potential to solve the global warming problem because of the totally renewable green source ofsun and water. Because of its superior properties, such as a proper and narrow bandgap, betterchemical stability, non-toxic, photo-corrosion resistance, and suitable optimum conduction and valanceband potentials, the tin disulfide (SnS2) photocatalyst has great potential to be used for producing H2from the splitting of water via solar energy. In this study, SnO2 powders were successfully thermallysulfurized to SnS2 powders at 500°C for 24 hours under an Argon (Ar) atmosphere. The XRD analysisverified the hexagonal SnS2 crystals. UV-vis spectroscopy was used to determine the band gap valueof the generated powder, which is 2.24 eV.
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    Synthesizing of SnS2 photocatalyst from SnO2 powders by thermal sulfurization with varying temperature (400 °C and 500 °C) and time
    (2023-01-01) OK, ALAADDİN CEM; SARIOĞLU, CEVAT; OK A. C., SARIOĞLU C.
    SnS2 from SnO2 powders was successfully produced by the thermal sulfurization method to obtain pure SnS2 powders by varying the sulfurization temperature and time. XRD analysis confirmed pure hexagonal SnS2 powders at 400 and 500 °C after 24 h of sulfurization. Grain size analysis in SEM indicated that the average grain size of powders synthesized at 400 °C and 500 °C were 1 and 11 μm, respectively. The band gap values of the obtained powders at 400 and 500 °C was determined by UV–vis spectroscopy as 2.26 eV and 2.24 eV, respectively. The photoelectrochemical analysis of the SnS2 photoelectrode produced at 500 °C revealed a flat band potential of −0.50 V, a charge carrier density of 1.49 × 1020 cm −3 and photocurrent density of 2.5 μA/cm2 at 0 V vs SCE. These results indicated that SnS2 synthesized for the first time by the thermal sulfurization technique from SnO2, which was a simple and cheap technique, was a promising candidate to be used as a photocatalysts.