Table 2.

Noble metal-based nano-catalysts for VOCs oxidation.

Catalyst	Preparation Method	Loading (wt%)	Catalyst Mass (mg)	VOC Type	VOC Concentration (ppm)	Reference
Pt/TiO2	impregnation	0.01–1.00	250	formaldehyde	22	[43]
Pt/ZSM-5	reduction	0.50–2.00	100	toluene	1000	[44]
Pt/SiO2	flame spray pyrolysis	0.21	100	benzene	100	[45]
Pd/TiO2	impregnation + reduction	1.00	500	formaldehyde	10	[46]
Pd/TiO2	deposition-precipitation + reduction	1.00	500	formaldehyde	10	[46]
Au/TiO2	deposition-precipitation	1.00	200	propene	1000	[47]
Ag/TiO2	impregnation	8.00	60	formaldehyde	110	[48]
Ag/CeO2/SiO2	impregnation	5.00	145	formaldehyde	18,000–22,000	[49]