Mechanochemical Synthesis of Visible Light Sensitive Titanium Dioxide Photocatalyst

Table 1

Phase composition (X_A fraction of anatase; X_R, rutile; X_II, TiO₂-II phase), specific area (S) and crystal size (D_A, anatase; D_R, rutile and D_II, TiO₂-II phase) of the different phases present at the as prepared sample and after grinding for 1.6 hours without additives (1.6 h) and with ammonium carbamate additive (1.6 h AC), respectively.

Sample	XA	XR	XII	DA (nm)	DR (nm)	DII (nm)	S (m^2/g)
As prepared	1.00	—	—	6.8	—	—	232
1.6 h	0.35	0.35	0.30	7.1	5.7	5.1	81
1.6 h AC	1.00	—	—	8.0	—	—	135