Effect of Gold Dispersion on the Photocatalytic Activity of Mesoporous Titania for the Vapor-Phase Oxidation of Acetone

Table 1

Physical properties of TiO₂ and Au/TiO₂ samples.

Sample	Calcination Temp. (K)	Au content (wt%)		Surface area (m^2g^-1)	Average crystallite size(d) (nm)	Average gold particle size(e) (nm)	Average pore diameter(f) (nm)
		Initial	Final
T1(a)	623	–-		109	9.6	–-	4.2
H1(b)	375	1.0	0.6	–-	–-	–-	–-
H2(b)	523	1.0	0.6	214.4	5.2	∼1.0	3.5, 2.4
H3(b)	623	1.0	0.6	157.0	4.4	1.0	3.3, 1.6
H4(b)	773	1.0	0.6	–-	10.8	–-	–-
H5(b)	623	1.5	0.8	66.1	11.3	5.7	3.8
H6(b)	623	2.0	1.3	65.0	8.7	–-	–-
I1(c)	623	1.0	1.1	74.7	7.1	7.5	4.7
I2(c)	623	1.5	1.7	35.7	7.0	–-	4.5
I3(c)	623	2.0	2.1	39.4	7.0	9.0	4.5

(a)TiO₂ sample prepared by hydrothermal route.
(b)Au/TiO₂ with gold incorporated during hydrothermal process.
(c)Au/TiO₂ with gold dispersed over sample T1 by impregnation.
(d)From XRD data using Scherrer’s equation.
(e)From TEM results.
(f)From N₂ adsorption data.