Effect of annealing temperature on phase transition and optical property of titanate nanotubes prepared by ion exchange approach

Physico-chemical properties and possible photocatalytic applications of titanate nanotubes synthesized via hydrothermal method

“…This value is consistent with the already published results [50]. The literature data [49,51,52] concerning band gap of titanate nanotubes are inconsistent. Some researchers found that E g of TNT was higher than that of anatase, whereas others reported inverse relation.…”

“…Similarly, the total pore volume was increasing from 1.31 to 1.69 cm 3 /g for TNT130,24 -TNT140,48, respectively. The obtained values are consistent with the literature data [48,49]. For example, Tsai et al [48] reported that the BET surface area of TNTs prepared via hydrothermal method at 130°C for 24h was equal to 399 m 2 /g and the pore volume was 1.47 cm 3 /g.…”

“…Such low values of E g were associated with a high rutile content in the prepared samples. Khan et al [52] found the band gap of 3.1 eV, whereas Wang et al [49] determined the E g = 3.6 eV. Bavykin et al [15,53] reported E g value as high as 3.87 eV.…”

“…For example, Tsai et al [48] reported that the BET surface area of TNTs prepared via hydrothermal method at 130°C for 24h was equal to 399 m 2 /g and the pore volume was 1.47 cm 3 /g. Wang et al [49] prepared titanate nanotubes at 130°C for 20h. The BET surface area of such prepared samples was equal to 375 m 2 /g.…”

Lead titanate nanotubes synthesized via ion-exchange method: Characteristics and formation mechanism

“…A simple and cost effective hydrothermal method for the large scale production of titanate nanotubular material was firstly reported by Kasuga et al [13]. Some investigations have been conducted on the phase and morphology of titanate nanotubes [14][15][16][17]. Many research groups [18][19][20] reported that protonated titanate nanotubes and sodium titanate nanotubes can be synthesized with and without hydrogen ion treatment.…”