The Progress of TiO_𝟐 Nanocrystals Doped with Rare Earth Ions

Table 4

Characterization of samples. Reprinted with permission from [74].

Sample	Anastase fraction^a [nm]	Anastase crystal size^a [nm]	Rutile crystal size^a [nm]	Band gap energy [eV]	Sscr [m^2/g]
P25	0.70	22	37	3.25	51
P25_600	0.70	25	36	3.23	47
P25_0, 2La_600	0.71	28	41	3.23	46
P25_0, 2Ce_600	0.71	27	50	3.19	47
P25_0, 2Y_600	0.72	28	39	3.16	46
P25_0, 2Pr_600	0.71	27	50	3.14	47
P25_0, 25m_600	0.71	26	47	3.16	46
P25_800	0.05	—	43	3.04	16
P25-0.2La-800	0.22	31	43	3.03	23
P25-0.2Ce-800	0.15	35	45	3.04	19
P25-0.2Y-800	0.13	30	50	3.02	20
P25-0.2Pr-800	0.31	35	47	3.02	24
P25-0.25m-800	0.08	29	50	3.01	17
P25-1La-800	0.31	35	45	3.05	25
P25-1Ce-800	0.48	31	47	3.07	30
P25-1Y-800	0.05	—	50	3.04	16
P25-1Pr-800	0.15	31	45	3.03	21
P25-15m-800	0.37	33	50	3.06	29
P25_2La_800	0.14	34	47		21
P25_2Ce_800	0.15	35	49		18

^aDetermined from XRD.