hydrothermal route. The workers also evaluated its photoactivity by the degradation
of methyl orange, which is representative of stable azo dyes. Moreover, Tian et al.
[26] synthesized gold loaded on TiO 2 (Au/TiO 2 ) catalysts using Au (I)–thiosulfate
complex (Au(S 2 O 3 ) 2 )
3À as the golden precursor for the first time, and its
photoactivity was tested by the degradation of MO under visible light. Also, Yuan
et al. [27] reported that La
3+ -doped mesoporous TiO 2 with a highly crystallized
framework and long-range order was prepared by using nano-anatase particles as
nano-building units. Based on the previous work [12], Yuan and his coworkers also
prepared highly dispersed Pd nanoparticles in La-doped mesoporous TiO 2 with
crystalline framework via co-assembly and photoreduction method [28] in 2006.
Figure 3.2 is an illustration of the process. By using this simple method, highly
dispersed Pd nanoparticles were prepared in La-doped mesoporous titania with
crystallized walls by in situ photoreducing of PdO at room temperature.
In 2010, Zhang et al. [29] prepared Fe
3+ -doped mesoporous TiO 2 with ordered
mesoporous structure via the solvent evaporation-induced self-assembly process
through using P123 as soft template. They also successfully prepared the copper
impregnated Ms-TiO 2 by using water immiscible room-temperature ionic liquid
1-butyl-3-methyl-imidazolium-tetrafluoroborate as a template and an effective additional solvent via the sol–gel method at low temperature [30]. As a result, the
photoactivity of the sample Cu/Ms-TiO 2 is superior to P-25, Ms-TiO 2 , and 2.0%
Cu/P-25 in the case of 2,4-dichlorophenol and methyl orange under visible light
(λ > 420 nm).
Not only the doping of metal can improve the photocatalytic activity, but also the
doping of nonmental element can achieve the same goal. A thermal stable SiO 2 -
doped mesoporous TiO 2 with high crystallinity was prepared through a templating
Fig. 3.2 Preparation of Pd nanoparticles in La-doped mesoporous titania by co-assembly and in
situ photoreduction. (Reprinted with permission from Ref. [28]. Copyright 2006, Springer)
50
3 Titanium-Based Mesoporous Materials for Photocatalysis
of methyl orange, which is representative of stable azo dyes. Moreover, Tian et al.
[26] synthesized gold loaded on TiO 2 (Au/TiO 2 ) catalysts using Au (I)–thiosulfate
complex (Au(S 2 O 3 ) 2 )
3À as the golden precursor for the first time, and its
photoactivity was tested by the degradation of MO under visible light. Also, Yuan
et al. [27] reported that La
3+ -doped mesoporous TiO 2 with a highly crystallized
framework and long-range order was prepared by using nano-anatase particles as
nano-building units. Based on the previous work [12], Yuan and his coworkers also
prepared highly dispersed Pd nanoparticles in La-doped mesoporous TiO 2 with
crystalline framework via co-assembly and photoreduction method [28] in 2006.
Figure 3.2 is an illustration of the process. By using this simple method, highly
dispersed Pd nanoparticles were prepared in La-doped mesoporous titania with
crystallized walls by in situ photoreducing of PdO at room temperature.
In 2010, Zhang et al. [29] prepared Fe
3+ -doped mesoporous TiO 2 with ordered
mesoporous structure via the solvent evaporation-induced self-assembly process
through using P123 as soft template. They also successfully prepared the copper
impregnated Ms-TiO 2 by using water immiscible room-temperature ionic liquid
1-butyl-3-methyl-imidazolium-tetrafluoroborate as a template and an effective additional solvent via the sol–gel method at low temperature [30]. As a result, the
photoactivity of the sample Cu/Ms-TiO 2 is superior to P-25, Ms-TiO 2 , and 2.0%
Cu/P-25 in the case of 2,4-dichlorophenol and methyl orange under visible light
(λ > 420 nm).
Not only the doping of metal can improve the photocatalytic activity, but also the
doping of nonmental element can achieve the same goal. A thermal stable SiO 2 -
doped mesoporous TiO 2 with high crystallinity was prepared through a templating
Fig. 3.2 Preparation of Pd nanoparticles in La-doped mesoporous titania by co-assembly and in
situ photoreduction. (Reprinted with permission from Ref. [28]. Copyright 2006, Springer)
50
3 Titanium-Based Mesoporous Materials for Photocatalysis