Photocatalysis Research Division
Design, Fabrication and Application of Functionalized Particles
Ken-ichi SHIMIZU@ Ewa KOWALSKA
We are aiming to design and fabricate functionalized micro-/nano-particles and apply them to chemical reaction systems for efficient use of energy and resources. Recent achievements include (1) development of analytical methods, action spectrum analyses and double-beam photoacoustic spectroscopy for evaluating photocatalyst particles for the purpose of designing a highly active photocatalyst; (2) preparation of highly active titanium (IV) oxide (titania) photocatalyst particles using a newly developed gas-phase reactor (Fig. 1); (3) development of a visible-light responsive gold-loaded titania photocatalyst particles driven by surface plasmon resonance absorption of gold; (4) development of metal oxide particles with micro-macro hierarchical structure through processes such as hydrothermal treatment of substrates (Fig. 2), which show relatively high level of photocatalytic activity under visible-light irradiation.