| 초록 |
Titanium dioxide (TiO2) is one of highly promising photocatalysts because of its biological and chemical inertness, nontoxicity, low cost, and high photocatalytic activity. However, generally anatase TiO2 shows a large band gap (3.2 eV) corresponding to UV light (λ ＜ 380 nm), which only accounts 5% of the solar energy spectrum. Over few decades, transition metal doping and organic-inorganic hybridization are proposed to enhance photocatalytic performance of TiO2. These two approaches, however, have shown disadvantages such as limited visible light absorption due to inhomogeneous distribution of doped heteroatom in TiO2 and lowered mobility of carriers in the localized states, respectively. In this work, TiO2 nanoparticles with enriched oxygen vacancy were synthesized using polyvinyl alcohol and consequently, TiO2/activated carbon substrate was fabricated for the detection and reduction of NOx gas with enhanced visible-light photocatalytic activity. |
