Preparation and characterization of macroporous TiO2–SrTiO3 heterostructured monolithic photocatalyst

Preparation of LaTiO2N Using Hydrothermally Synthesized La2Ti2O7 as a Precursor and Urea as a Nitriding Agent

“…[10,23,[25][26][27] When O atoms are partially substituted by N atoms, the N 2p states and O 2p states are hybridized, reducing the band gap. [28,29] Perovskite-type metal oxynitrides commonly contain early transition metals such as Ti, V, Zr, Nb, Ta, Mo, and W. Jansen et al demonstrated that the solid solutions between CaTaO 2 N and LaTaON 2 (i.e., Ca x La 1-x TaO 1+x N 2-x ) have a range of yellow to red colors and are possible pigments to replace Cd-containing materials. [20] As a typical perovskite-type oxynitride, LaTiO 2 N has been recognized as a candidate for a visible-light-driven photocatalysis because of its narrow band gap (ca.…”

TiO2/SrTiO3 and SrTiO3 microspheres decorated with Rh, Ru or Pt nanoparticles: Highly UV–vis responsible photoactivity and mechanism

“…Moreover, the proper couple of SrTiO 3 and TiO 2 would lead to not only the transfer of electron from the CB of SrTiO 3 to that of TiO 2 , but also the transfer of holes from the valence band (VB) of TiO 2 to that of SrTiO 3 , which effectively prevent the recombination of photogenerated electrons and holes in the coupled SrTiO 3 -TiO 2 heterostructure and as a result may improve the photocatalytic activity of semiconductors. Literature data showed that the coupled SrTiO 3 /TiO 2 composite could improve the charge separation and achieve a higher photocatalytic activity [4][5][6][7][8][9][10][11][12]. Zhang et al prepared SrTiO 3 /TiO 2 by forming SrTiO 3 on highly ordered TiO 2 nanotube arrays, and indicated that the SrTiO 3 /TiO 2 nanotube nanojunctions were formed after immersion of the TiO 2 nanotubes into Sr(OH) 2 solution [11,12].…”

Novel hybrid Sr-doped TiO2/magnetic Ni0.6Zn0.4Fe2O4 for enhanced separation and photodegradation of organics under visible light

“…9,[17][18][19][20][21][22][23] Alternatively, pure or modied perovskite strontium titanate (SrTiO 3 ) and SrTiO 3 /TiO 2 heterojunctions have also been investigated as a candidate for the photodegradation of organic pollutants. [23][24][25][26][27] However, a few studies have been conducted on Sr 2+ doped TiO 2 for the photodegradation of organic compounds. Very recently, Li et al 28 synthesized Sr 2+ -doped ZnO composites and attributed its enhanced performance over ZnO for RhB degradation under visible light to the narrowed band gap and the formation of active defects to trap electrons.…”