Visible light-driven hydrogen evolution by using mesoporous carbon nitride-metal ferrite (MFe2O4/mpg-CN; M: Mn,Fe, Co and Ni) nanocomposites as catalysts |
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| Affiliation: | 1. Department of Chemistry, College of Sciences, Koç University 34450, Istanbul, Turkey;2. Department of Biochemistry, Selcuk University, 42030, Konya, Turkey;3. Department of Biotechnology, Selcuk University, 42030, Konya, Turkey;1. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China;2. School of Chemistry and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, PR China;1. Selcuk University, Department of Nanotechnology and Advanced Materials, 42030, Konya, Turkey;2. Linz Institute for Organic Solar Cells (LIOS) and Institute of Physical Chemistry, Johannes Kepler University Linz, Altenbergerstraße 69, 4040, Linz, Austria;3. Selcuk University, Department of Biochemistry, 42030, Konya, Turkey;4. Karamanoglu Mehmetbey University, Scientific and Technological Research & Application Center, 70200, Karaman, Turkey;5. Karamanoglu Mehmetbey University, Department of Metallurgy and Materials Engineering, Karaman 70200, Turkey;1. Selcuk University, Department of Biotechnology, 42030, Konya, Turkey;2. Karamanoglu Mehmetbey University, Department of Metallurgical and Materials Engineering, 70200, Karaman, Turkey;3. Selcuk University, Department of Biochemistry, 42030, Konya, Turkey;4. Karamanoglu Mehmetbey University, Scientific and Technological Research & Application Center, 70200, Karaman, Turkey |
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| Abstract: | Four different earth-abundant ferrite nanoparticles (MFe2O4, M: Mn, Fe, Co, Ni) with spinel structure were synthesized by using the surfactant-assisted high temperature thermal decomposition methods and then assembled on mesoporous graphitic carbon nitride (mpg-CN) to study their comparative catalysis for the photocatalytic hydrogen evolution reaction (HER) in the presence of Eosin-Y (EY) as a visible-light sensitizer. The yielded monodisperse ferrite nanoparticles and the MFe2O4/mpg-CN nanocomposites were characterized by using advanced analytical techniques including TEM, XPS, XRD, ICP-MS, and UV–Vis DRS. All the tested MFe2O4/mpg-CN nanocomposites provided the better catalytic performance than that of pristine mpg-CN in the photocatalytic HER and their photocatalytic HER rates are in the order of NiFe2O4/mpg-CN > CoFe2O4/mpg-CN > MnFe2O4/mpg-CN > Fe3O4/mpg-CN > mpg-CN. Among the tested MFe2O4/mpg-CN nanocomposites, NiFe2O4/mpg-CN nanocomposite provided the highest hydrogen generation of 14.56 mmol g?1, which is 6.75 times greater than that of pristine mpg-CN and, using EY as a visible light sensitizer and triethanolamine (TEOA) as a sacrificial reagent. According to the optical properties and energy band positions of the nanocomposites, a plausible mechanism for the NiFe2O4/mpg-CN catalyzed HER is proposed to give insights on the highest activity of NiFe2O4/mpg-CN nanocomposites among others. |
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| Keywords: | Mesoporous graphitic carbon nitride Ferrite nanoparticles Hydrogen evolution Photocatalysis |
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