The Influence of La Doping on Structural, Optical …
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Fig. 3 TEM images of the samples: a TiO 2 and b 2La/TiO 2
Fig. 4 XRD patterns of (1) TiO 2 , (2) 1La/TiO 2 and (3) 2La/TiO 2 (*—anatase, ˆ—rutile)
ions inhibit the A–R phase transformation, others argued that La promotes the rutile
formation. In our case, doping with La ions promotes the rutile formation even at
lower temperatures (500 °C).
The crystallites size of the samples as calculated through Debye–Scherrer equation
in the pure TiO 2 is equal to 10 nm for anatase (101) and 7 nm for rutile (110) (Table 2).
Doping with La leads to a decrease in the anatase crystallite sizes from 10 to 8 nm and
in the rutile crystallite sizes from 7 to 5 nm (Table 2). This statement is supported
by our studies using TEM (Fig. 3). It is interesting to note that the size of rutile
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Fig. 3 TEM images of the samples: a TiO 2 and b 2La/TiO 2
Fig. 4 XRD patterns of (1) TiO 2 , (2) 1La/TiO 2 and (3) 2La/TiO 2 (*—anatase, ˆ—rutile)
ions inhibit the A–R phase transformation, others argued that La promotes the rutile
formation. In our case, doping with La ions promotes the rutile formation even at
lower temperatures (500 °C).
The crystallites size of the samples as calculated through Debye–Scherrer equation
in the pure TiO 2 is equal to 10 nm for anatase (101) and 7 nm for rutile (110) (Table 2).
Doping with La leads to a decrease in the anatase crystallite sizes from 10 to 8 nm and
in the rutile crystallite sizes from 7 to 5 nm (Table 2). This statement is supported
by our studies using TEM (Fig. 3). It is interesting to note that the size of rutile