Effect of TiO2 crystallite size on the dispersion of Co on nanocrystalline TiO2 |
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| Authors: | Wilasinee Kongsuebchart Joongjai Panpranot Chairit Satayaprasert and Piyasan Praserthdam |
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| Institution: | (1) Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bankok, 10330, Thailand |
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| Abstract: | Nanocrystalline TiO2 powders with average crystallite sizes of 9–15 nm were synthesized by the solvothermal method and employed as supports for
Co catalysts. The value of H2 chemisorption/specific surface area of Co/TiO2 increased significantly with increasing TiO2 crystallite size. It was suggested that the higher amount of Ti3+ surface defects on the larger crystalline TiO2 resulted in a stronger interaction between Co and TiO2, hence, higher dispersion of Co was obtained. |
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| Keywords: | TiO2 solvothermal crystallite size cobalt catalyst dispersion |
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