Influence of the Synthesis pH on the Properties and Activity of Sol-Gel TiO₂ Photocatalysts

Table 1

Synthesis conditions, crystallinity, and photocatalytic activity in terms of the first-order kinetic constant for RO16 decolorization of powder photocatalysts.

Name	pH	Temp. (^∘C)	XRD Data			𝑘RO (h^-1)
			Anatase (%)	𝐷anat (nm)	𝑆𝑔^† (m^2g^-1)
P-TiO2-1	1.5	500	100	14	110	0.22
P-TiO2-2	1.5	600	89	42	37	0.32
P-TiO2-3	6.5	500	100	12	128	0.38
P-TiO2-4	6.5	600	100	24	64	1.09

^†Estimated assuming nonporous spherical particles with a density corresponding to bulk anatase.