TiO₂Nanoparticles as Functional Building Blocks

One‐Step Direct Synthesis of SiO2–TiO2 Composite Nanoparticle Assemblies with Hollow Spherical Morphology

“…[32] A precursor solution containing an equimolar amount of Si(OEt) 4 and Ti(OiPr) 4 yielded NP assemblies with a beautiful hollow spherical morphology as expected (Entry 4 in Table 1 and Figure 1d). Similar reactions of precursor solutions containing low amounts of Si(OEt) 4 also resulted in composite NP assemblies with hollow spherical morphology (Entries 2 and 3 in Table 1 and Figure 1b and 1c). However, higher amounts of Si(OEt) 4 resulted in a very low product yield (Entries 5 and 6 in Table 1 and Figure 1e and 1f ).…”

“…Precursor solutions containing Si(OEt) 4 , Ti(OiPr) 4 , and ophthalic acid in methanol (MeOH) were heated up to 300°C at a heating rate of 5.4°C/min (Table 1), where the existence of o-phthalic acid and slow heating are necessary for the fabrication of the hollow structure through Ostwald ripening as discussed in a previous paper. [32] A precursor solution containing an equimolar amount of Si(OEt) 4 and Ti(OiPr) 4 yielded NP assemblies with a beautiful hollow spherical morphology as expected (Entry 4 in Table 1 and Figure 1d). Similar reactions of precursor solutions containing low amounts of Si(OEt) 4 also resulted in composite NP assemblies with hollow spherical morphology (Entries 2 and 3 in Table 1 and Figure 1b and 1c).…”

“…[1][2][3][4][5][6][7][8][9][10][11][12] In addition, TiO 2 nanoparticles (NPs) are also used in the preparation of nanocomposites in order to enhance the optical, mechanical, electrical, and thermal properties of polymeric materials. [13][14][15][16][17][18] Despite their inherent excellent properties, TiO 2 NPs have several drawbacks such as agglomeration and poor interaction with organic materials.…”

“Black” TiO2 Nanotubes Formed by High-Energy Proton Implantation Show Noble-Metal-co-Catalyst Free Photocatalytic H2-Evolution

“…This feature becomes even more visible under illumination. This Ti 3+ center can be described by orthorhombic g values [1.990 1.929 1.909], with a considerable distribution in the g strain contribution which is significantly different from the typically observed Ti 3+ centers found in the reduced titania [36,37].Overall the PL and EPR findings strongly support that a main electronic effect of p + -implantation is the creation of paramagnetically active recombination states that are close to the band gap of the anatase. Such features were also observed for high pressure hydrogenated anatase, where they have been identified as a key indicator for establishing intrinsic H 2 evolution ability in TiO 2 [20,21].…”

“…This feature becomes even more visible under illumination. This Ti 3+ center can be described by orthorhombic g values [1.990 1.929 1.909], with a considerable distribution in the g strain contribution which is significantly different from the typically observed Ti 3+ centers found in the reduced titania [36,37].…”