Research Article

Photocatalytic Activity of Toluene under UV-LED Light with TiO2 Thin Films

Table 1

Surface properties of dip-coated TiO2 thin films on stainless steel substrates.

Surface propertiesCatalysts
TiO20.3% Fe-TiO20.5% Fe-TiO20.7% Fe-TiO2

Crystalline phaseAnataseAnataseAnataseAnatase
Optical band gap (eV)3.273.283.222.82
Grain size (nm)20–25020–15050–18030–100
RMS average roughnesses (nm)18.3011.9218.4012.92
Apparent surface area (m2 m−2) (1)1.081.061.111.09
Total weight of TiO2 on substrate (g m−2) (2)0.150.150.150.14
Total apparent surface area per total weight of TiO2 (m2 g−1) (3) = (1)/(2)7.137.077.667.81
BET surface area (m2 g−1) 36.9821.6132.5742.73
Adherence
 Classification4B4B4B4B
 RankGoodGoodGoodGood
Corrosion test

: no visible damage.