Research Article
Photocatalytic Reaction of Gas-Phase Naphthalene on Paint- and Sunscreen-Coated Surfaces
Table 2
Calculated rate constants, half-lives, and fractional conversions for naphthalene photocatalytic degradation experiments.
| | | Rate constant
(min−1) | Normalized rate constant based on specific surface area
(g min−1 cm−2) | Normalized rate constant based on available TiO2
(min−1 g−1) | Half-life
(min) | Fractional conversion at
t = 70 min |
| | 30% RH | | | | | | | P1 thin | 0.023 ± 0.006 | 2.23 × 10−7 | 150 | 30.1 | 70% | | P1 thick | 0.020 ± 0.007 | 1.94 × 10−7 | 170 | 34.7 | 68% | | P2 thin | 0.024 ± 0.006 | 2.54 × 10−7 | 53.0 | 28.9 | 81% | | P2 thick | 0.012 ± 0.002 | 1.27 × 10−7 | 26.5 | 57.8 | 61% | | S1 thin | 0.044 ± 0.024 | 3.48 × 10−7 | 1730 | 15.8 | 94% | | S1 thick | 0.033 ± 0.009 | 2.61 × 10−7 | 1300 | 21.0 | 88% |
| | 70% RH | | | | | | | P1 thin | 0.025 ± 0.0046 | 2.43 × 10−7 | 162 | 27.7 | 86% | | P1 thick | 0.036 ± 0.012 | 3.49 × 10−7 | 311 | 19.3 | 90% | | P2 thin | 0.029 ± 0.011 | 3.07 × 10−7 | 64.1 | 23.9 | 87% | | P2 thick | 0.024 ± 0.010 | 2.54 × 10−7 | 53.0 | 28.9 | 80% | | S1 thin | 0.061 ± 0.025 | 4.83 × 10−7 | 2400 | 11.4 | 96% | | S1 thick | 0.049 ± 0.025 | 3.88 × 10−7 | 1920 | 14.1 | 95% |
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