한국진공학회 제 45 회 하계학술대회 Tutorial 08/21/2013 한국화학연구원 최지나

Red Ox – Red + Ox Reduction Oxidation CB VB h+h+ Recombination (heat) e–e– Excitation by light (hv) H 2 (H  ) H 2 O (H + ) CO 2  − CO 2 H 2 O (OH – ) OH Energy : Hydrogen Production via Water Splitting Carbon Dioxide Reduction into Hydrocarbon Fuel Environmental Application: Water and Air Purification

S.-Y. Lee, S.-J. Park, J. Ind. Eng. Chem. (2013),

Band Gap Energies and Positions of Various Semiconductors

High Photocatalytic Activity Robust Chemical Stability Low Production Cost Non-Toxicity TiO 2 & Light Water Treatment Decomposition of Organic Pollutants Anti-Bacterial Anti-Fogging Air Purification Removal of NO x, SO x, Aldehydes Deordorization 3.2 eV Self-Cleaning

Modification of TiO2 Morphology: Enhancing Photocatalytic Activity High Surface Area Adsorption Capacity Enhanced Interfacial Charge Transfer A. Fujishima et al., Electro. Soc. Interface (2013), 51

Water Treatment Decomposition of Persistent Organic Pollutants (POPs) Air Purification Removal of NO x and Aldehydes, Deordorization

TiO 2 loading pH Temperature Dissolved oxygen Contaminants and their loading Light wavelength Light intensity Response surface analysis

Ti Photocatalyst: TiO 2 / SrTiO 3 / K 2 La 2 Ti 3 O 10 / Ba-La 2 Ti 2 O 7 Nb Photocatalyst: K 4 Nb 6 O 17 / Sr 2 Nb 2 O 7 / Ba 2 Nb 4 O 15 / Cs 2 Nb 4 O 11 Ta Photocatalyst: Ta 2 O 5 / K 2 PrTa 5 O 15 / K 3 Ta 3 B 2 O 12 / NaTaO 3 / La-NaTaO 3 Other Photocatalysts: PbWO 4 / Sr-CeO 2 / BaCeO 3 Co-catalyst: Pt, NiO x, RuO 2

A. Kudo et al., Che. Soc. Rev. (2008), 253

S. N. Habisreutinger et al., Angew. Rev. (2012), 7372

J. Choi et al., Clean Technol. (2012), 229

S. N. Habisreutinger et al., Angew. Rev. (2012), 7372

Sun Wavelength (nm) UV VISIR 3.1eV1.6eV 46 % 38%17%3.5%0.5%0%

J. Choi et al., JPC C (2010), 783

Acetaldehyde Decomposition TiO 2-x N x

J. Choi et al., J. Mater. Chem. (2008), 2371