Table 3.
Summary on the intermediates formed in photocatalytic oxidation of typical indoor VOCs.
| Target VOC | Concentration (ppm) | Light Source | Main Intermediates | Chemical | Analytical Method | Ref. |
|---|---|---|---|---|---|---|
| Benzene | 3000–6000 | 4000 W Xe lamp | Benzaldehyde, benzoic acid | - | GC/MS | [83] |
| 614 | White fluorescent lamp | Phenol | Hydroquinone, 1,4-benzoquinone | GC/MS | [84] | |
| - | - | Phenol, hydro-quinone, benzoic acid | Malonic acid, benzoquinone | GC/MS/FTIR | [85] | |
| Toluene | 10 | Black light lamp | Benzaldehyde, benzoic acid | Benzyl alcohol | FTIR | [86] |
| 50–800 | 365 nm UV | Acetone, acetaldehyde, formaldehyde | Acrolein, butanone | TDS-GC/MS/FID, HPLC/UV/FTIR | [87] | |
| 370 | >400 nm | Benzaldehyde, benzoic acid | - | DRIFTS | [88] | |
| Xylene | 3000–6000 | 4000 W Xe lamp | Benzaldehyde, Methyl-benzaldehydes | 2,5-Furandione, 1,3-isobenzofurandione | GC/MS | [83] |
| 25–75 | UV | o-Tolualdehyde, o-toluic acid, benzoate ion | - | FTIR | [89] |