Table 2. Comparison of HCHO Sensing Performance in This Work and Those in Other Literature Studiesa.
| mater. | temp. (°C) | L. S. (nm) | conc. (ppm) | res. | τres./τrecov. (s) | Y. | ref. |
|---|---|---|---|---|---|---|---|
| WO3/ZnWO4 | 220 | 5 | 44.5b | 12/14 | 2019 | (13) | |
| Cu–Sn3O4 | 160 | 100 | 53b | 5/120 | 2020 | (80) | |
| Y–SnO2 | 180 | 25 | 9b | 8/10 | 2019 | (81) | |
| CuO | 30 | 80 | 32c | 301/705 | 2020 | (39) | |
| g-C3N4/ZnO | RT | 50 | 24.4b | 30/70 | 2020 | (82) | |
| Pt/MoO3 | RT | 200 | 39.3%d | 21.4/16.6 | 2019 | (83) | |
| PEDOT/PSS/MWCNTs-N2 | RT | 10 | 30.5%d | 45/7 | 2019 | (84) | |
| TiO2/SnO2 | RT | UV (365) | 10 | 20b | 20/56 | 2020 | (22) |
| ZnOx/ANS/rGO | RT | vis. (405) | 1 | 38%d | 47/39 | 2021 | (70) |
| HoFeO3 | RT | red (660) | 100 | 75%e | 719/248 | 2020 | (85) |
| MoS2/rGO | RT | vis. (>420) | 10 | 64%e | 17/98 | 2020 | (86) |
| VO-rich ZnO | RT | vis. (>420) | 1 | 63%f | 32/20 | this work | |
| 10 | 208%f | 10/5 |
a
Mater.: materials; temp.: operating temperature; L. S.: light source; conc.: gas concentration; res.: response; D. L.: detection limit; τres./τrecov.: response/recovery time; Y.: publication year; ref.: references; and vis.: visible light.
b
Ra/Rg.
c
Rg/Ra.
d
(Ra −Rg)/Ra*100%.
e
(Rg – Ra)/Ra*100%.
f
(Ig – Ia)/Ia*100%.