E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

Table 3

Comparison of the properties of the SG- and SP-TiO₂ photocatalytic thin films and of other studies.

Substrate	Catalyst	Amount of Ag (% wt)	Preparation		% crystalline		Bandgap energy (eV)	Contact angle (°)	Number of coating layers	Grain size (nm)	Roughness RMS (nm)	Surface area/weight of catalyst (m^2·g^−1)	Reference
			Method	Temp (°C)	Anatase	Rutile
Glass	SG-TiO2	—	Sol–gel	500	100	0	3.19	46.78	5	35–90	1.75	2.27	This study
Glass	SP-TiO2	—	Spray	80	100	0	3.22	57.31	5	25–80	0.88	2.53	This study
Glass	TiO2	—	Spin	500	100	0	—	2	—	50–100	—	—	[28]
Silicon wafer	TiO2	—	Spin	500	100	0	—	25	3	30	3.44	—	[29]
Glass	TiO2	—	Sol–gel	500	100	0	3.27	—	5	15–100	2.62–5.74	2.58–10.27	[30]
Glass	TiO2	—	Sputtering	250	100	0	3.75	—	—	185	6.87	—	[31]

The apparent surface area is measured by AFM.