Abstract
TiO2 is a representative photocatalyst used in practical applications. To improve its catalytic activity, an increase in the active surface area and electroconductivity is a promising approach. For this purpose, various composite structures have been investigated by many researchers. We investigated the composition of TiO2 with multi-walled carbon nanotubes (MWCNT) using various approaches. Recently, we have developed on environmentally-friendly sol–gel electrophoretic deposition (sol–gel EPD) to find the best composite structures of TiO2 and MWCNT as a photoanode.[1] Consequently, it was demonstrated that sol–gel EPD produces various film structures by changing the deposition conditions. For example, it was confirmed that the solute composition, that is, the proportion of TiO2 sol to MWCNT in the electrophoresis bath, linearly changed the thickness and Ti/C composition of the film. Excellent photoelectrochemical activity for the water-splitting reaction was confirmed with a TiO2 film by combining MWCNT in an appropriate manner via sol–gel EPD to improve the film conductivity and UV adsorption by TiO2. In this presentation, several conditions including solvent as well as solute composition of sol–gel EPD significantly influencing film structures of TiO2/MWCNT composite films will be introduced, and the as-prepared film structures that show the best photoelectrochemical activity are also discussed.[1] Matsunaga, Y. Yu, K.Takahashi, “Photoelectrochemical Activity of TiO2/MWCNT Thin-Film Electrodes with Different Film Structures Prepared by Combining Electrophoretic Deposition and Sol–Gel Method,” Electrochemistry, 92(4), 047004 (2024).
Published Version
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